SpringBoot使用EventBus实现事件监听并消费

一，依赖

  com.google.guava
  guava
  22.0

二，配置文件

import com.atzhi.bang.thread.HandlerThread;
import com.google.common.eventbus.AsyncEventBus;
import com.google.common.eventbus.EventBus;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.concurrent.Executors;

@Configuration
public class EventBusConfig {

    @Bean
    public EventBus registerEventBus() {
        AsyncEventBus asyncEventBus = new AsyncEventBus("eventBusName", Executors.newFixedThreadPool(100));
        asyncEventBus.register(handlerThread());
        return asyncEventBus;
    }

    @Bean
    public HandlerThread handlerThread() { //HandlerThread 这个类需要有一个消费的方法，如下
        return new HandlerThread();
    }
}

三，调用这个EventBus事件监听配置不能直接注入到对应的方法中，需要使用SpringUtil.getBean()来注入

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.stereotype.Component;


@Component
public final class SpringUtils implements BeanFactoryPostProcessor
{
    
    private static ConfigurableListableBeanFactory beanFactory;
 
    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException
    {
        SpringUtils.beanFactory = beanFactory;
    }
 
    
    @SuppressWarnings("unchecked")
    public static  T getBean(String name) throws BeansException
    {
        return (T) beanFactory.getBean(name);
    }
 
    
    public static  T getBean(Class clz) throws BeansException
    {
        T result = (T) beanFactory.getBean(clz);
        return result;
    }
 
}

四，注入EventBus后调用他的post()方法传入事件信息给对应的方法处理，也就是上面说到的消费方法

 @Subscribe @AllowConcurrentEvents这两个注解一定要加上，不然post传的参接收不到