借助rabbitMQ，当文章发布、修改、删除时发送一条消息，消息数据为文章id，搜索服务编写监听器接收消息，保存新的数据。

一、文章微服务添加依赖

   <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

二、配置rabbitmq

指定自定义交换机：WEBLOG.ARTICLE.EXCHANGE

rabbitmq:
    host: 你的rabbitmq的host
    username: **
    password: **
    virtual-host: **
    publisher-confirms: true
    template:
      exchange: WEBLOG.ARTICLE.EXCHANGE

三、文章Service层编写发送消息方法

/**
     * 发送消息
     * @param aid
     */
    private void sendMsg(String type,String aid) {

        try {
            rabbitTemplate.convertAndSend("article."+type,aid);
        }catch (AmqpException e){
            e.printStackTrace();
        }
    }

在指定位置调用：

 /**
     * 发布文章
     * @param map
     */
    @Transactional(rollbackFor = Exception.class)
    public void publish(Map<String,Object> map) throws ParseException {
		...............
         .............
        //发送消息
        sendMsg("publish",article.getAid());
    }

TIP:

文章的发布、修改、软删除、强删除、点赞、评论分别对应的type为：

publish、update、black、delete、thumbup、comment

四、搜索微服务编写监听类

同上引入依赖加上配置

4.1 listener:

注：

1. @Queue：绑定指定队列名
2. exchange：交换机名，这里为配置文件中配置的交换机名
3. key：接收的routingKey

/**
 * @author MaoLin Wang
 * @date 2019/10/1917:35
 */
@Component
public class ArticleListener {


    @Autowired
    private ArticleService articleService;

    /**
     * 修改或发布文章
     * @param aid
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     */
    @RabbitListener(bindings = @QueueBinding(
        value = @Queue(value = "WEBLOG.ARTICLE.SAVE.QUEUE",durable = "true"),
        exchange = @Exchange(value = "WEBLOG.ARTICLE.EXCHANGE",ignoreDeclarationExceptions ="true",type = ExchangeTypes.TOPIC),
        key = {"article.publish","article.update"}
    ))
    public void save(String aid) throws InvocationTargetException, IllegalAccessException {
        if("".equals(aid)){
            return;
        }
        articleService.save(aid);
    }

    /**
     * 删除文章
     * @param aid
     */
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "WEBLOG.ARTICLE.DELETE.QUEUE",durable = "true"),
            exchange = @Exchange(value = "WEBLOG.ARTICLE.EXCHANGE",ignoreDeclarationExceptions ="true",type = ExchangeTypes.TOPIC),
            key = {"article.delete"}
    ))
    public void delete(String aid)  {
        if("".equals(aid)){
            return;
        }
        articleService.delete(aid);
    }

    /**
     * 后台软删除文章
     * @param aid
     */
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "WEBLOG.ARTICLE.BLACK.QUEUE",durable = "true"),
            exchange = @Exchange(value = "WEBLOG.ARTICLE.EXCHANGE",ignoreDeclarationExceptions ="true",type = ExchangeTypes.TOPIC),
            key = {"article.black"}
    ))
    public void black(String aid){
        if("".equals(aid)){
            return;
        }
        articleService.black(aid);
    }

    /**
     * 点赞
     * @param aid
     */
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "WEBLOG.ARTICLE.THUMBUP.QUEUE",durable = "true"),
            exchange = @Exchange(value = "WEBLOG.ARTICLE.EXCHANGE",ignoreDeclarationExceptions ="true",type = ExchangeTypes.TOPIC),
            key = {"article.thumbup"}
    ))
    public void thumbup(String aid){
        if("".equals(aid)){
            return;
        }
        articleService.thumbup(aid);
    }

    /**
     * 增加评论
     * @param aid
     */
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "WEBLOG.ARTICLE.COMMENT.QUEUE",durable = "true"),
            exchange = @Exchange(value = "WEBLOG.ARTICLE.EXCHANGE",ignoreDeclarationExceptions ="true",type = ExchangeTypes.TOPIC),
            key = {"article.comment"}
    ))
    public void comment(String aid)  {
        if("".equals(aid)){
            return;
        }
        articleService.comment(aid);
    }

}

4.2 保存文章

/**
     * 发布文章、修改文章
     * @param aid
     * @throws InvocationTargetException
     * @throws IllegalAccessException
     */
    @Transactional(rollbackFor = Exception.class)
    public void save(String aid) throws InvocationTargetException, IllegalAccessException {
        .........相关业务.......
        articleDao.save(article);
    }