spring-amqp

问题 We have observed the following behavior of RabbitMQ and are trying to understand if it is correct and how to resolve it. Scenario: A (persistent) message is delivered into a durable queue The (single) Consumer (Spring-AMQP) takes the message and starts processing => Message goes from READY to UNACK Now the broker is shut down => Client correctly reports "Channel shutdown" The consumer finishes the processing, but can not acknowledge the message as the broker is still down Broker is started

问题 I am using spring boot amqp in which I will be consuming a list of Employee objects from a queue. My listener method looks like this: @RabbitListener(queues = "emp_queue") public void processAndPortEmployeeData(List<Employee> empList) { empList.forEach(emp -> { some logic }) } However, when I try to consume the message, I get a class cast exception: For some reason, I'm getting a LinkedHashMap. Caused by: java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.integration

问题 I would like to receive messages from a queue an immediately dequeue them, in fact I would like to mimic the behaviour of the rabbitMQ admin console which can receive a message and requeue it. So my question is how to do this? At first I was trying to make a clone of the message and re-send them, but it seems that the rabbitTemplate is not able to send messages directly to a queue and sending them to an exchange is not an option because it could be possible that multiple queues will receive

问题 On my project(spring-rabbit..), Set fixed ReplyTo queue on template, I use convertSendAndReceive method for RPCs. I understand that mekes correlationId automatically. Can I set correlationId before using that method? Here is Template. @Bean public RabbitTemplate rabbitTemplate() { RabbitTemplate template = new RabbitTemplate(connectionFactory()); template.setMessageConverter(jsonMessageConverter()); template.setRoutingKey(AmqpConstants.JOB_QUEUE_NAME); template.setExchange(AmqpConstants.JOB

问题 I've got an integration flow that looks like the following: @Bean public IntegrationFlow auditFlow(@Qualifier("eventLoggingConnectionFactory") ConnectionFactory connectionFactory, @Qualifier("writeChannel") MessageChannel messageChannel, @Qualifier("parseErrorChannel") MessageChannel errorChannel) { return IntegrationFlows .from(Amqp.inboundAdapter(connectionFactory, auditQueue) .errorChannel(errorChannel) .concurrentConsumers(numConsumers) .messageConverter(new MongoMessageConverter())) //

问题 I am testing Spring-AMQP with Spring-Integration support, I've following configuration and test: <rabbit:connection-factory id="connectionFactory" /> <rabbit:queue name="durableQ"/> <int:channel id="consumingChannel"> <int:queue capacity="2"/> <!-- Message get Acked as-soon-as filled in Q --> </int:channel> <int-amqp:inbound-channel-adapter channel="consumingChannel" queue-names="durableQ" connection-factory="connectionFactory" concurrent-consumers="1" acknowledge-mode="AUTO" /> public static

问题 I am trying to update the consumer-tag to be more informative than the randomly generated string. We have a pattern which we use that includes hostname + identifier + randomized string. This works fine in our other services (ie: NodeJS with ampqlib ) because they provide a mechanism to pass in this value. However, for our Java services, we use spring-amqp and it looks like there is no way to pass in a consumer-tag value. I took a look at BlockingQueueConsumer and it is currently hard-coded to

问题 I have spent the last little while trying to get it so that my handler that is registered using @RabbitListener will have the message converted with the Jackson2JsonMessageConverter. Unfortunately no matter what configuration setup I try only the SimpleMessageConverter is used. @Component @Slf4j public class TestQueueListener { @RabbitListener(queues = "#{@allQueue}") public void processMessage(String data) { log.trace("Message received: {}", data); } @RabbitListener(queues = "#{@invokeQueue}

问题 We have a project that's using Spring-AMQP to consume messages from our RabbitMQ broker. We would like to increase the concurrency on the consuming side so that multiple worker threads can process messages in parallel. I began by reading the documentation for the native RabbitMQ client, and that lead me to a design of using a single consumer, and a prefetch count > 1 to control for parallelism. Using the RabbitMQ client directly, this seems quite natural. The handleDelivery method of the

问题 A colleague and I are working on an application using Spring which needs to get a message from a RabbitMQ queue. The idea is to do this using (the usually excellent) spring annotation system to make the code easy to understand. We have the system working using the @RabbitListner annotation but we want to get a message on demand. The @RabbitListner annotation does not do this, it just receives messages when they are available. The demand is determined by the "readiness" of the client i.e. a