用户触发某种行为动作,根据行为类型,分别执行延迟30s处理数据动作,和立即处理数据重做两种业务
方案一:Redis key监听器,但是考虑实际key数量,放弃该方式
方案二:方案RabbitMQ延迟队列实现,程序同时监听两种队列即可,简单方便
因为不熟悉RabbitMQ相关配置,导致很多奇奇怪怪的问题,特此记录
理由:
application.yml
如下
spring:
# rabbitmq相关配置
rabbitmq:
# 链接超时时间
connection-timeout: 1000
cache:
channel:
# 要保留在高速缓存中的通道数
size: 200
# 如果已达到高速缓存大小,则等待获取通道的持续时间。如果为0,则始终创建一个新通道。
checkout-timeout: 500
connection:
mode: channel
publisher-returns: true
publisher-confirm-type: simple
配置类
如下
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.api.RabbitListenerErrorHandler;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Objects;
@Configuration
public class RabbitMqConfig {
@Bean
public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(ConnectionFactory connectionFactory,
MessageConverter messageConverter) {
SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
factory.setConnectionFactory(connectionFactory);
factory.setMessageConverter(messageConverter);
factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);
// 根据CPU数量,动态调整消费者最大值
int i = Runtime.getRuntime().availableProcessors();
factory.setMaxConcurrentConsumers(i * 5);
return factory;
}
@Bean
public MessageConverter jsonMessageConverter() {
return new Jackson2JsonMessageConverter();
}
}
消费者代码如下
import com.alibaba.fastjson.JSONObject;
import com.qlm.yfb.util.log.LogUtils;
import com.rabbitmq.client.Channel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.handler.annotation.Header;
import javax.annotation.PostConstruct;
import java.io.IOException;
/**
* @author chunyang.leng
* @date 2022-06-17 9:52 PM
*/
@Configuration
public class WechatDeadLetterConsumer {
private static final Logger logger = LoggerFactory.getLogger(WechatDeadLetterConsumer.class);
@PostConstruct
private void postConstruct(){
LogUtils.info(logger,"启动 ========> 微信延迟队列消费者");
}
@RabbitListener(
autoStartup = "true",
bindings = {
@QueueBinding(
value = @Queue(name = "subscribeDelayQueue"),
exchange = @Exchange(name = "deadLetterExchange"),
key = {"subscribeDelayQueueRoutingKey"}
),
@QueueBinding(
value = @Queue(name = "clickMenuQueue"),
exchange = @Exchange(name = "wechatPushExchange"),
key = {"clickMenuQueueRoutingKey"}
)
}
)
// 幂等检查注解
@IdempotenceCheck(redisKeyPrefix = "delay:strategy:")
public void enterpriseWechatDeadLetterHandler(EnterpriseWechatDelayDTO enterpriseWechatDelayDTO, Channel channel, @Header(AmqpHeaders.DELIVERY_TAG) long tag){
LogUtils.debug(logger,"消费到EnterpriseWechat死信队列数据:{}", JSONObject.toJSONString(enterpriseWechatDelayDTO));
try {
// todo 处理业务
} catch (Exception e) {
logger.error("rabbitmq 消费信息出现异常", e);
} finally {
try {
channel.basicAck(tag, false);
} catch (IOException e) {
logger.error("rabbitmq ack出现异常", e);
}
}
}
}
因生产者和消费者框架不同,配置方式不太一样,生产者为Spring MVC
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Recoverable;
import com.rabbitmq.client.RecoveryListener;
import com.rabbitmq.client.ShutdownSignalException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.AcknowledgeMode;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.connection.*;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.ConditionalRejectingErrorHandler;
import org.springframework.amqp.rabbit.listener.RabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.listener.api.RabbitListenerErrorHandler;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;
/**
* @author chunyang.leng
* @date 2021-04-13 9:32 上午
*/
@Configuration
@PropertySource("classpath:rabbit-push.properties")
public class RabbitMqConfig {
private static final Logger logger = LoggerFactory.getLogger(RabbitMqConfig.class);
@Value("${rabbit.push.address:192.168.1.2}")
private String rabbitPushAddress;
@Value("${rabbit.push.username:xxx}")
private String rabbitPushUsername ;
@Value("${rabbit.push.password:xxxxxx}")
private String rabbitPushPassword;
@Value("${rabbit.consumesize:10}")
private Integer consumesize;
@Bean
public ConnectionFactory wechatPushConnectionFactory(ConnectionListener wechatPushConnectionListener,
RecoveryListener wechatPushRecoveryListener,
ChannelListener wechatPushChannelListener) {
CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
connectionFactory.setAddresses(rabbitPushAddress);
connectionFactory.setUsername(rabbitPushUsername);
connectionFactory.setPassword(rabbitPushPassword);
connectionFactory.setVirtualHost("/");
connectionFactory.setCacheMode(CachingConnectionFactory.CacheMode.CHANNEL);
// 坑一,正确值应该设置大一些,比如200
connectionFactory.setChannelCacheSize(5);
// 坑二,正确值应该设置大一些,比如2000,单位毫秒
connectionFactory.setChannelCheckoutTimeout(0);
connectionFactory.setPublisherReturns(true);
connectionFactory.setPublisherConfirmType(CachingConnectionFactory.ConfirmType.SIMPLE);
connectionFactory.addConnectionListener(wechatPushConnectionListener);
connectionFactory.addChannelListener(wechatPushChannelListener);
connectionFactory.setRecoveryListener(wechatPushRecoveryListener);
connectionFactory.getRabbitConnectionFactory().setRequestedChannelMax(500);
return connectionFactory;
}
@Bean
public RabbitListenerContainerFactory yfbPushListenerContainerFactory(ConnectionFactory wechatPushConnectionFactory,
MessageConverter jsonMessageConverter) {
SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
factory.setConnectionFactory(wechatPushConnectionFactory);
factory.setMessageConverter(jsonMessageConverter);
factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);
factory.setConcurrentConsumers(consumesize);
factory.setMaxConcurrentConsumers(consumesize);
factory.setPrefetchCount(1000);
factory.setChannelTransacted(false);
factory.setDefaultRequeueRejected(false);
factory.setErrorHandler(new ConditionalRejectingErrorHandler());
return factory;
}
@Bean
public MessageConverter jsonMessageConverter() {
return new Jackson2JsonMessageConverter();
}
}
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Service;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
/**
* 类名: MessageEventService </br>
* 描述: 核心服务类 </br>
*/
@Slf4j
@RestController
public class MessageEvent {
@Autowired
private SubscribeEventListener subscribeEventListener;
@Autowired
private ClickMenuMessageEventListener clickMenuMessageEventListener;
/**
* 处理微信发来的请求
* @param request
* @return xml
*/
@PostMapping("handle")
public String processRequest(HttpServletRequest request, HttpServletResponse response) {
// todo 用户关注事件
subscribeEventListener.onApplicationEvent(new SubscribeEvent(openid));
// todo 用户点击菜单事件
clickMenuMessageEventListener.onApplicationEvent(new ClickMenuEvent(openid));
}
}
Listener 超级大坑
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;
/**
*
*
* @author chunyang.leng
* @date 2022-06-20 1:19 PM
*/
@Component
public class ClickMenuMessageEventListener implements ApplicationListener<ClickMenuEvent> {
@Autowired
private RabbitTemplate rabbitTemplate;
@Override
public void onApplicationEvent(ClickMenuEvent event) {
String openId = event.getOpenId();
EnterpriseWechatDelayDTO dto = new EnterpriseWechatDelayDTO();
dto.setOpenId(openId);
dto.setSource(EnterpriseWechatSource.CLICK_MENU_EVENT);
dto.setDelayStrategy(DelayStrategyEnum.ENTERPRISE_WECHAT_CUSTOMER_SERVICE_PUSH);
// 发送到mq,直接消费,不做延迟处理
rabbitTemplate.convertAndSend("wechatPushExchange","clickMenuQueueRoutingKey",dto);
}
}
以上代码上线之后,出现服务器内存增加,连接数暴增等现象
分析内存镜像,发现有大量http链接被卡住,导致内存增加
分析线程运行情况,发现大量amqp线程处理等待状态
查看amqp线程发现全部都在创建链接
查看源代码
最后发现,ThreadLocal
tomcat因为是BIO模式,因此每次请求都是一个线程在处理,而在投递信息的时候,直接调用的send,因此这里会一直是null,直到。。。tomcat所有线程执行完毕,并且每个线程都通过ThreadLocal绑定channel,才不会在继续创建channel
而且,tomcat设置的线程数,,嗯.配置如下,后果自己脑补吧
解决方案,,,在线程池中使用amqpTemplate即可
修改后的示例代码
rabbitMqThreadPool.execute(()->{
// 发布用户关注事件
subscribeEventListener.onApplicationEvent(new SubscribeEvent(openid));
});
线程池配置
@Bean
public ThreadPoolTaskExecutor rabbitMqThreadPool(){
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
//获取到服务器的cpu内核
int i = Runtime.getRuntime().availableProcessors();
//核心池大小
executor.setCorePoolSize(i);
//最大线程数
executor.setMaxPoolSize(i * 2);
//队列长度
executor.setQueueCapacity(60000);
//线程空闲时间
executor.setKeepAliveSeconds(1000);
//线程前缀名称
executor.setThreadNamePrefix("rabbitMq-thread-pool-");
//配置拒绝策略
executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardPolicy());
return executor;
}
这样 channel的数量,就是线程池的maxCore数量了,搞定收工