Question

由于spring amqp引用doc说“当回复超时（replyTimeout）时，sendAndReceive（）方法返回null”。据我所知，replyTimeout的默认值是5秒。

所以，我正在做的是打开100个线程。每个线程使用sendAndReceive操作将消息发送到一个队列。 RabbitListener监听该队列，接收消息并发送回复。

有些线程在5秒之前得到null。据我所知，RabbitTemplate首先必须等待5秒，如果没有收到回复，则返回null。请帮帮我，我做错了什么？

上下文：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:rabbit="http://www.springframework.org/schema/rabbit"

   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                       http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">

<context:component-scan base-package="ru.cib" />
<rabbit:annotation-driven />
<rabbit:connection-factory id="connFactory" host="localhost" username="guest" password="guest" channel-cache-size="10" />
<rabbit:admin id="admin" connection-factory="connFactory" />    
<rabbit:queue name="requestQueue" />  
<rabbit:direct-exchange name="directExchange">
    <rabbit:bindings>
        <rabbit:binding key="directRequestKey" queue="requestQueue" />
    </rabbit:bindings>
</rabbit:direct-exchange>

<rabbit:template id="requestTemplate" connection-factory="connFactory" channel-transacted="true" reply-timeout="10000" />

<bean id="rabbitTxManager" class="org.springframework.amqp.rabbit.transaction.RabbitTransactionManager">
    <property name="connectionFactory" ref="connFactory" />
</bean>

<bean id="rabbitListenerContainerFactory" class="org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory">
        <property name="connectionFactory" ref="connFactory" />
        <property name="concurrentConsumers" value="10" />
        <property name="maxConcurrentConsumers" value="20" />
        <property name="transactionManager" ref="rabbitTxManager" />
        <property name="channelTransacted" value="true" />
    </bean>
</beans>

方法：

for (int i = 1; i <= 100; i++) {
    pool.submit(new RunnableImpl(i));
}

public void run() {
    LOG.info("thread send request {}", i);
    Integer resp = (Integer) requestTemplate.convertSendAndReceive("directExchange", "directRequestKey", i);
    if (resp == null) {
        LOG.error("thread get null for request {}!!!", i);
    } else {
        LOG.info("thread get response {}", resp);
    }
}

@RabbitListener(queues = "requestQueue")
    public int receivedRequestMessage(int data, Message request) throws Exception {
        LOG.info("receive request {}, {}", data, request);
        LOG.info("sleep for 2 seconds");
        Thread.sleep(2000);
        int reply = data * 100;
        LOG.info("sending response {}", reply);
        return reply;
    }

Answer 1

我的错误。 sendAndReceive操作效果很好：等待replyTimeout属性中指定的一段时间，然后尝试接收答案。

我对自己的日志感到困惑......

Spring Amqp sendAndReceive操作获取null但没有发生超时

1 个答案: