SpringBoot项目中使用Google EventBus

SpringBoot项目中使用Google EventBus

1、项目导入依赖

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>20.0</version>
</dependency>

2、注册为Bean组件

package com.jidi.springbootredis.config;

import com.google.common.eventbus.AsyncEventBus;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @Description
 * @Author jidi
 * @Email [email protected]
 * @Date 2021/5/20
 */

@Configuration
public class EventBusConfig {

    /**
     * 定义EventBus
     */
    @Bean
    public AsyncEventBus asyncEventBus() {
        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(3, 10, 60,TimeUnit.SECONDS, new ArrayBlockingQueue<>(10), new ThreadPoolExecutor.DiscardPolicy());
        return new AsyncEventBus(threadPoolExecutor);
    }
}

3、添加事件处理监听器

package com.jidi.springbootredis.listener;

import com.google.common.eventbus.AsyncEventBus;
import com.google.common.eventbus.Subscribe;
import com.jidi.springbootredis.model.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;

/**
 * @Description
 * @Author jidi
 * @Email [email protected]
 * @Date 2021/5/20
 */

@Slf4j
@Component
public class EventBusListener {

    @Autowired
    private AsyncEventBus eventBus;


    /**
     *  在事件总线中注册
     */
    @PostConstruct
    public void init(){
        eventBus.register(this);
    }



    /**
     *  具体要执行的业务逻辑
     */
    @Subscribe
    public void test(User user){
        log.info("{}", user.toString());
    }
}

4、业务层调用

    @Autowired
    private EventBus eventBus;


    /**
     * 使用EventBus进行异步处理，会执行EventBusListener中对应的方法，根据参数类型进行匹配
     */
    public void test(){
        eventBus.post(new User());
    }