RabbitMQ:setReturnListner handleBasicReturn未收到未送达邮件的呼叫

对于其中一个需求，我们需要跟踪队列深度和成功处理的消息。其思想是发布消息并获得成功和失败消息的列表。为了模拟需求，我做了以下操作

发布带有强制和即时标志sent channel.basicPublish'exchange'，'rKey'，true，false，props，“Hello World.”字节的消息

消费者使用偶数标记（我将1..10中的数字作为标记值放在每条消息的标题中），而不确认奇数消息

我在发布服务器中实现了setReturnListnere以捕获未送达的消息

虽然我能够通过Rabbmitmqctl list_queues messages_unacknowledged获取未确认消息的数量，但不知何故，我的handleBasicReturn方法没有被调用。我错过了什么

代码片段：

制作人：

channel.setReturnListener(new ReturnListener() {
    public void handleBasicReturn(int replyCode, String replyText, String exchange,
                                  String routingKey, AMQP.BasicProperties properties,
                                  byte[] body) 
            throws IOException {
        println "Debugging messages!!!!"
        println "The details of returned messages are ${replyText} from  ${exchange} with routingKey as ${routingKey} with properties"
    }
});

println " queuename is ${dec.queue} and consumerCount is ${dec.consumerCount} messageCount is ${dec.messageCount}"
(1..10).each {
    println "Sending file ${i}....."
    def headers = new HashMap<String,Object>()
    headers.put "operatiion","scp"
    headers.put "dest","joker.dk.mach.com"
    headers.put "id", i
    println headers

    BasicProperties props = new BasicProperties(null, null, headers, null, null, null, null, null,null, null, null, null,null, null)
                    channel.basicPublish 'exchange' ,'rKey',true,false, props,"Hello Worls".bytes                                
    i++                         
}
channel.close()

了解即时和强制标志如何影响RabbitMQ中的消息传递

在您的情况下，因为您有一个消费者正在接收消息，所以即使消费者从未确认消息，消息也不会返回

D

while (true) {
    def delivery = consumer.nextDelivery()
    def headers = delivery?.properties?.headers
    def id = headers.get("id")
    println "Received message:"
    println " ${id.toString()}"

    if( id % 2 == 0){
        channel.basicAck delivery.envelope.deliveryTag, false                
    }    
}