文章目录

为什么要设置HTTP timeout？

  1. 与用户操作相关的接口，如果不设置超时时间，将会出现长时间的无响应，严重影响用户体验。
  2. 负载很高的系统，因为大量调用耗时长的接口，导致性能急剧下降，从而影响其他正常的业务。
  3. 某些情况下，HTTP请求可能永远都得不到响应，那么这部分系统资源就一直被占用，直到系统奔溃。

HttpClient超时配置参数的问题

客户端httpclient的关于连接的配置相关的参数和意义如下：

SocketTimeout 是 5s

  • 连接建立后，数据传输过程中数据包之间间隔的最大时间

ConnectTimeout 是 3s

  • 连接建立时间，即三次握手完成时间

ConnectionRequestTimeout 是默认值

  • httpclient使用连接池来管理连接，这个时间就是从连接池获取连接的超时时间

响应超时时间异常

在网络不好的时候, 请求超时时间并没有按照我们的设置报超时异常，明明响应超时时间设置了5s，很多请求超时时间都达到了10几秒甚至有的二十几秒，大大超过了我们的预期时间
在这里插入图片描述

虽然报文(“abc”)返回总共用了6秒，如果SocketTimeout设置成5秒，实际程序执行的时候是不会抛出java.net.SocketTimeoutException: Read timed out异常的。

  • 因为SocketTimeout的值表示的是“a”、”b”、”c”这三个报文，每两个相邻的报文的间隔时间没有能超过SocketTimeout。

wireshark抓包结果
可能会想实际的报文是不是每经过3秒返回一个报文呢，下面是通过wireshark抓包的结果

1：返回字母a的TCP报文
2：返回字母b的TCP报文
3：返回字母c的TCP报文

根据time列可以看出TCP数据传输报文之间的间隔就是3秒。，每个报文后还有一个ACK的报文，就是tcp客户端的回执报文
在这里插入图片描述

  • 因此可以得出结论: SocketTimeout时间是我们两次读取数据之间的最长阻塞时间，如果我在网络抖动的情况下，我每次2秒之内返回一部分数据，这样我就一直不会超时了

Apache的Httpclient不同版本设置超时时间的方法是不一样的，要特别注意：

3.x.超时设置实例

/* 从连接池中取连接的超时时间(单位是ms),超时则抛出ConnectionPoolTimeoutException*/ 
ConnManagerParams.setTimeout(params, 1000); 
/*客户端和服务器建立连接超时时间(单位是ms),超时则抛出ConnectionTimeOutException*/ 
HttpConnectionParams.setConnectionTimeout(params, 2000); 
/*(已建立连接)指客户端从服务器读取数据的超时时间(单位是ms),超时则抛出SocketTimeOutException*/
HttpConnectionParams.setSoTimeout(params, 4000);

   
   
   
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4.x.超时设置实例

connectionRequestTimout(单位是ms)：指从连接池获取连接的timeout超出预设时间(

  • 从连接池获取连接的超时时间，如果连接池里连接都被用了，且超过设定时间就会抛出ConnectionPoolTimeoutException

connetionTimeout(单位是ms)：指客户端和服务器建立连接的timeout.

  • 就是http请求的三个阶段，一：建立连接；二：数据传送；三，断开连接。如果与服务器(这里指数据库)请求建立连接的时间超过ConnectionTimeOut，就会抛 ConnectionTimeOutException，即服务器连接超时，没有在规定的时间内建立连接。

socketTimeout(单位是ms)：指客户端和服务进行数据交互的时间，是指两者之间如果两个数据包之间的时间大于该时间则认为超时，而不是整个交互的整体时间，比如如果设置1秒超时，如果每隔0.8秒传输一次数据，传输10次，总共8秒，这样是不超时的。而如果任意两个数据包之间的时间超过了1秒，则超时。 超出后会抛出SocketTimeOutException.

public static void main(String[] args) throws Exception{
    <span class="token comment">//创建httpclient</span>
    CloseableHttpClient httpClient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">createDefault</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">//创建http get</span>
    HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span><span class="token string">"http://www.taotao.com/"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">//构建超时等配置信息</span>
    RequestConfig config <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span> <span class="token comment">//连接超时时间</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span> <span class="token comment">//从连接池中取的连接的最长时间</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">10</span> <span class="token operator">*</span><span class="token number">1000</span><span class="token punctuation">)</span> <span class="token comment">//数据传输的超时时间</span>
            <span class="token punctuation">.</span><span class="token function">setStaleConnectionCheckEnabled</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span> <span class="token comment">//提交请求前测试连接是否可用</span>
            <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">//设置请求配置时间</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span><span class="token punctuation">;</span>
     
    <span class="token comment">//接受返回的数据</span>
    CloseableHttpResponse response <span class="token operator">=</span> null<span class="token punctuation">;</span>
     
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        response <span class="token operator">=</span> httpClient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span><span class="token keyword">finally</span><span class="token punctuation">{<!-- --></span>
        <span class="token keyword">if</span><span class="token punctuation">(</span>response<span class="token operator">!=</span>null<span class="token punctuation">)</span><span class="token punctuation">{<!-- --></span>
            response<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        httpClient<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

}

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结合代码测试

注：下面面Case是使用httpclient版本4.5.2测试所得

		<dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.2</version>
            <type>jar</type>
        </dependency>

 
 
 
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1.完整测试接口代码
/**
 * 超时测试接口
 */
@RestController
@RequestMapping("/test")
@Slf4j
public class TimeoutTestController {
<span class="token comment">/**
 * 1.测试socketOutTimeout，三秒后返回数据
 *
 * @return
 * @throws InterruptedException
 */</span>
<span class="token annotation punctuation">@GetMapping</span><span class="token punctuation">(</span><span class="token string">"/socket_timeout"</span><span class="token punctuation">)</span>
String <span class="token function">socketTimeout</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> InterruptedException <span class="token punctuation">{<!-- --></span>
    log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"socket_timeout"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    TimeUnit<span class="token punctuation">.</span>MILLISECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">3000</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">return</span> <span class="token string">"/socket_timeout接口调用成功"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token comment">/**
 * 2.测试socketOutTimeout，
 * 每隔0.8秒返回数据，循环发送，模拟网络不好的时候，收到的数据断断续续
 * @return
 * @throws InterruptedException
 */</span>
<span class="token annotation punctuation">@GetMapping</span><span class="token punctuation">(</span><span class="token string">"/socket_timeout_2"</span><span class="token punctuation">)</span>
<span class="token keyword">void</span> <span class="token function">socketTimeout2</span><span class="token punctuation">(</span>HttpServletResponse response<span class="token punctuation">)</span> <span class="token keyword">throws</span> InterruptedException<span class="token punctuation">,</span> IOException <span class="token punctuation">{<!-- --></span>
    log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"socket_timeout_2"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">10</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"{}"</span><span class="token punctuation">,</span> i<span class="token punctuation">)</span><span class="token punctuation">;</span>
        response<span class="token punctuation">.</span><span class="token function">getWriter</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">""</span> <span class="token operator">+</span> i<span class="token punctuation">)</span><span class="token punctuation">;</span>
        response<span class="token punctuation">.</span><span class="token function">flushBuffer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        TimeUnit<span class="token punctuation">.</span>MILLISECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">800</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment">/**
 * 3.测试connectionRequestTimeout用的服务，三秒后返回数据
 *
 * @param request
 * @return
 * @throws InterruptedException
 */</span>
<span class="token annotation punctuation">@GetMapping</span><span class="token punctuation">(</span><span class="token string">"/connection_request_timeout"</span><span class="token punctuation">)</span>
String <span class="token function">connectionRequestTimeout</span><span class="token punctuation">(</span>HttpServletRequest request<span class="token punctuation">)</span> <span class="token keyword">throws</span> InterruptedException <span class="token punctuation">{<!-- --></span>
    log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"{}"</span><span class="token punctuation">,</span> request<span class="token punctuation">.</span><span class="token function">getRequestURI</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    TimeUnit<span class="token punctuation">.</span>MILLISECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">3000</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">return</span> <span class="token string">"/connection_request_timeout调用成功"</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

}

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2.完整单元测试代码
/**
 * 测试HttpClient超时参数
 */
public class TimeoutTestControllerTest {
    String urlPrefix = "http://localhost:8443";
<span class="token comment">/**
 * 1.connectionTimeout测试：IP无法建立连接，连接超时
 *
 * @throws Exception
 */</span>
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">connectionTimeout</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> Exception <span class="token punctuation">{<!-- --></span>
    CloseableHttpClient httpclient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">createDefault</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span><span class="token string">"http://192.168.0.125:8443"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">//设置超时时间</span>
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">long</span> startTime <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"response:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求成功耗时"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">ConnectTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求失败耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment">/**
 * 2.socketTimeout测试，服务端没有指定时间内任何响应，会超时
 *
 * @throws Exception
 */</span>
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">socketTimeout</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> Exception <span class="token punctuation">{<!-- --></span>
    CloseableHttpClient httpclient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">createDefault</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span>urlPrefix <span class="token operator">+</span> <span class="token string">"/test/socket_timeout"</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//test/socket_timeout 3秒后才会返回数据</span>

    <span class="token comment">//设置超时时间</span>
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">long</span> startTime <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"response:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求成功耗时"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求失败耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment">/**
 * 3.socketTimeout测试：服务端隔800ms返回一点数据,不会超时
 *
 * @throws Exception
 */</span>
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">socketTimeoutNo</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
    CloseableHttpClient httpclient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">createDefault</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span>urlPrefix <span class="token operator">+</span> <span class="token string">"/test/socket_timeout_2"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">//设置超时时间</span>
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">long</span> startTime <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"response:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",服务端每隔800ms返回一点数据,不会超时。耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"任意两个数据包之间的时间超过了1秒，则超时。耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>


<span class="token punctuation">}</span>

<span class="token comment">/**
 * 4.connectionRequestTimeout测试:指从连接管理器(例如连接池)中拿到连接的超时时间
 * &lt;p&gt;
 * (多线程连接池)PoolingHttpClientConnectionManager, 可以创建并管理一个连接池，为多个路由或目标主机提供连接
 */</span>
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">connectionRequestTimeoutWithPoolingConnectionManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> InterruptedException <span class="token punctuation">{<!-- --></span>
    PoolingHttpClientConnectionManager connManager <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">PoolingHttpClientConnectionManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    connManager<span class="token punctuation">.</span><span class="token function">setMaxTotal</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">final</span> CloseableHttpClient httpclient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setConnectionManager</span><span class="token punctuation">(</span>connManager<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">final</span> HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span>urlPrefix <span class="token operator">+</span> <span class="token string">"/test/connection_request_timeout"</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//当前接口会休眠3秒在返回,因此需要设大SocketTimeout</span>

    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">3500</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">// 如下多线程占满连接池</span>
    ExecutorService executorService <span class="token operator">=</span> Executors<span class="token punctuation">.</span><span class="token function">newFixedThreadPool</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">10</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        <span class="token keyword">int</span> finalI <span class="token operator">=</span> i<span class="token punctuation">;</span>
        executorService<span class="token punctuation">.</span><span class="token function">submit</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span><span class="token operator">&gt;</span> <span class="token punctuation">{<!-- --></span>
            <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
                CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
                System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">// 在连接池占满的情况下，拿不到就会抛异常</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2: "</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>


    <span class="token comment">//休眠20S</span>
    TimeUnit<span class="token punctuation">.</span>SECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token comment">/**
 * 5.connectionRequestTimeout测试，指从连接管理器中拿到连接的超时时间，由于使用基本的连接管理器，连接被占用时，直接无法分配连接
 * connectionRequestTimeout并未生效，目前看来该参数只在 “ 多线程连接池 ” 奏效.
 * &lt;p&gt;
 * (单线程连接池)BasicHttpClientConnectionManager
 * 自HttpClient 4.3.3起，BasicHttpClientConnectionManager可用作HTTP连接管理器的最简单实现。它用于创建和管理一次只能由一个线程使用的单个连接。
 */</span>
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">connectionRequestTimeoutWithBasicConnectionManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> Exception <span class="token punctuation">{<!-- --></span>
    BasicHttpClientConnectionManager connManager <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">BasicHttpClientConnectionManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">final</span> CloseableHttpClient httpclient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setConnectionManager</span><span class="token punctuation">(</span>connManager<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setMaxConnPerRoute</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">final</span> HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span>urlPrefix <span class="token operator">+</span> <span class="token string">"/test/connection_request_timeout"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">100000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000000</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000000</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">// 如下多线程占满连接</span>
    ExecutorService executorService <span class="token operator">=</span> Executors<span class="token punctuation">.</span><span class="token function">newFixedThreadPool</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">10</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        <span class="token keyword">int</span> finalI <span class="token operator">=</span> i<span class="token punctuation">;</span>
        executorService<span class="token punctuation">.</span><span class="token function">submit</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span><span class="token operator">&gt;</span> <span class="token punctuation">{<!-- --></span>
            <span class="token keyword">try</span> <span class="token punctuation">(</span>CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>


    <span class="token comment">// 在连接池占满的情况下，拿不到就会抛异常</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2: "</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">//休眠20S</span>
    TimeUnit<span class="token punctuation">.</span>SECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

}

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分析每个单元测试案例

1.建立连接超时测试
  /**
     * 1.connectionTimeout测试：IP无法建立连接，连接超时
     *
     * @throws Exception
     */
    @Test
    public void connectionTimeout() throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpGet httpGet = new HttpGet("http://192.168.0.125:8443");
    <span class="token comment">//设置超时时间</span>
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">long</span> startTime <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"response:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求成功耗时"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">ConnectTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求失败耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
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响应结果:
在这里插入图片描述

当前请求的超时配置为:

  • 连接池获取连接时间1秒，建立连接时间1秒，数据包响应时间1秒

接口 http://192.168.0.125:8443 并不存在,因此客户端与服务端建立连接时间超出connectTimeout配置时间后就会抛出ConnectTimeoutException

2.响应超时测试(单个数据包)
    /**
     * 2.socketTimeout测试，服务端没有指定时间内任何响应，会超时
     *
     * @throws Exception
     */
    @Test
    public void socketTimeout() throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpGet httpGet = new HttpGet(urlPrefix + "/test/socket_timeout");//test/socket_timeout 3秒后才会返回数据
    <span class="token comment">//设置超时时间</span>
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">long</span> startTime <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"response:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",请求成功耗时"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">+</span><span class="token string">"=》请求失败耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
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响应结果:
在这里插入图片描述

当前请求的超时配置为:

  • 连接池获取连接时间1秒，建立连接时间1秒，数据包响应时间1秒

接口 /test/socket_timeout 会休眠3秒,因此服务端响应单个数据包超出socketTimeout配置时间后就会抛出SocketTimeoutException

3.响应超时测试(多个数据包)

网络不好时,服务端可能会分段返回多个数据包时,包与包之前不超过socketTimeout时间,而整体时间超过socketTimeout时间,也不会判断为超时

    /**
     * 3.socketTimeout测试：服务端隔800ms返回一点数据,不会超时
     *
     * @throws Exception
     */
    @Test
    public void socketTimeoutNo() {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpGet httpGet = new HttpGet(urlPrefix + "/test/socket_timeout_2");
    <span class="token comment">//设置超时时间</span>
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token keyword">long</span> startTime <span class="token operator">=</span> System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"response:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">",服务端每隔800ms返回一点数据,不会超时。耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">+</span><span class="token string">"=》任意两个数据包之间的时间超过了1秒，则超时。耗时:"</span> <span class="token operator">+</span> <span class="token punctuation">(</span>System<span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> startTime<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
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响应结果:
在这里插入图片描述

当前请求的超时配置为:

  • 连接池获取连接时间1秒，建立连接时间1秒，数据包响应时间1秒

接口 /test/socket_timeout_2 每隔0.8秒传输一次数据，传输10次，总共8秒，这样是不超时的。而如果任意两个数据包之间的时间超过了1秒，则超时，超出后会抛出SocketTimeOutException

本人测试过: 实际上okHttp以及HttpURLConnection 的 socketTimeOut 都是 连接建立后，数据传输过程中数据包之间间隔的最大时间
.
如果说错了请在下方对本文评论

4.多线程连接获取连接超时测试
    /**
     * 4.connectionRequestTimeout测试:指从连接管理器(例如连接池)中拿到连接的超时时间
     * <p>
     * (多线程连接池)PoolingHttpClientConnectionManager, 可以创建并管理一个连接池，为多个路由或目标主机提供连接
     */
    @Test
    public void connectionRequestTimeoutWithPoolingConnectionManager() throws InterruptedException {
        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager();
        connManager.setMaxTotal(2);
    <span class="token keyword">final</span> CloseableHttpClient httpclient <span class="token operator">=</span> HttpClients<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setConnectionManager</span><span class="token punctuation">(</span>connManager<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">final</span> HttpGet httpGet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpGet</span><span class="token punctuation">(</span>urlPrefix <span class="token operator">+</span> <span class="token string">"/test/connection_request_timeout"</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//当前接口会休眠3秒在返回,因此需要设大SocketTimeout</span>

    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">3500</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">// 如下多线程占满连接池</span>
    ExecutorService executorService <span class="token operator">=</span> Executors<span class="token punctuation">.</span><span class="token function">newFixedThreadPool</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">10</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        <span class="token keyword">int</span> finalI <span class="token operator">=</span> i<span class="token punctuation">;</span>
        executorService<span class="token punctuation">.</span><span class="token function">submit</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span><span class="token operator">&gt;</span> <span class="token punctuation">{<!-- --></span>
            <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
                CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
                System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">// 在连接池占满的情况下，拿不到就会抛异常</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2: "</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">//休眠20S</span>
    TimeUnit<span class="token punctuation">.</span>SECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
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响应结果:

在这里插入图片描述

当前请求的超时配置为:

  • 连接池获取连接时间1秒，建立连接时间1秒，数据包响应时间3.5秒

接口 /test/connection_request_timeout 会在3秒后返回数据，导致一个连接会被占用3秒后，才能被恢复可用状态，当多个线程同时从PoolingHttpClientConnectionManager 获取连接时，无空闲连接可用且超出等待获取连接池连接时间，会抛出ConnectionPoolTimeoutException

5.单线程连接获取连接超时测试
    /**
     * 5.connectionRequestTimeout测试，指从连接管理器中拿到连接的超时时间，由于使用基本的连接管理器，连接被占用时，直接无法分配连接
     * connectionRequestTimeout并未生效，目前看来该参数只在 “ 多线程连接池 ” 奏效.
     * <p>
     * (单线程连接管理)BasicHttpClientConnectionManager
     * 自HttpClient 4.3.3起，BasicHttpClientConnectionManager可用作HTTP连接管理器的最简单实现。它用于创建和管理一次只能由一个线程使用的单个连接。
     */
    @Test
    public void connectionRequestTimeoutWithBasicConnectionManager() throws Exception {
        BasicHttpClientConnectionManager connManager = new BasicHttpClientConnectionManager();
        final CloseableHttpClient httpclient = HttpClients.custom().setConnectionManager(connManager).setMaxConnPerRoute(1).build();
        final HttpGet httpGet = new HttpGet(urlPrefix + "/test/connection_request_timeout");
    RequestConfig requestConfig <span class="token operator">=</span> RequestConfig<span class="token punctuation">.</span><span class="token function">custom</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setConnectTimeout</span><span class="token punctuation">(</span><span class="token number">100000</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">setConnectionRequestTimeout</span><span class="token punctuation">(</span><span class="token number">1000000</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setSocketTimeout</span><span class="token punctuation">(</span><span class="token number">1000000</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    httpGet<span class="token punctuation">.</span><span class="token function">setConfig</span><span class="token punctuation">(</span>requestConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>

    <span class="token comment">// 如下多线程占满连接</span>
    ExecutorService executorService <span class="token operator">=</span> Executors<span class="token punctuation">.</span><span class="token function">newFixedThreadPool</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> <span class="token number">10</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        <span class="token keyword">int</span> finalI <span class="token operator">=</span> i<span class="token punctuation">;</span>
        executorService<span class="token punctuation">.</span><span class="token function">submit</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span><span class="token operator">&gt;</span> <span class="token punctuation">{<!-- --></span>
            <span class="token keyword">try</span> <span class="token punctuation">(</span>CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1:"</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

            <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
                System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>finalI <span class="token operator">+</span> <span class="token string">"=&gt;connectionRequestTimeoutTest1=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">// 在连接池占满的情况下，拿不到就会抛异常</span>
    <span class="token keyword">try</span> <span class="token punctuation">{<!-- --></span>
        CloseableHttpResponse response <span class="token operator">=</span> httpclient<span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span>httpGet<span class="token punctuation">)</span><span class="token punctuation">;</span>
        System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2: "</span> <span class="token operator">+</span> EntityUtils<span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getEntity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">SocketTimeoutException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=SocketTimeoutException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">IOException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=IOException=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        System<span class="token punctuation">.</span>err<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"main=&gt;connectionRequestTimeoutTest2=Exception=&gt;"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">":"</span> <span class="token operator">+</span> e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">//休眠20S</span>
    TimeUnit<span class="token punctuation">.</span>SECONDS<span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span><span class="token number">20</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
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响应结果:
在这里插入图片描述

当前请求的超时配置为:

  • 连接池获取连接时间1秒，建立连接时间1秒，数据包响应时间1秒

    接口 /test/connection_request_timeout 会在3秒后返回数据，导致一个连接会被占用3秒后，才能被恢复可用状态，BasicHttpClientConnectionManager 是一个简单的连接管理器，它用于创建和管理一次只能由一个线程使用的单个连接。 使用他当获取连接时超过 connectionRequestTimeout并未抛出ConnectionPoolTimeoutException，因此可以得出 connectionRequestTimeout是从 连接池获取连接的超时时间的设置

HttpClient之socketTimeOut源码解析
httpclient连接池异常引发的惨案

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