Question

更新：似乎更简单的测试用例不起作用：只是尝试通过进程内代理从ActiveMQ生成器向ActiveMQ使用者发送消息。这是代码：

val brokerURL = "vm://localhost?broker.persistent=false"
val connectionFactory = new ActiveMQConnectionFactory(brokerURL)
val connection = connectionFactory.createConnection()
val session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE)
val queue = session.createQueue("foo.bar")
val producer = session.createProducer(queue)
val consumer = session.createConsumer(queue)
val message = session.createTextMessage("marco")

producer.send(message)
val resp = consumer.receive(2000)
assert(resp != null)

我尝试使用akka-camel实现一个非常简单的请求 - 回复模式。这是我的（testbench）代码，它试图直接使用activeMQ发送消息并期待响应：

val brokerURL = "vm://localhost?broker.persistent=false"

// create in-process broker, session, queue, etc...
val connectionFactory = new ActiveMQConnectionFactory(brokerURL)
val connection = connectionFactory.createConnection()
val session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE)
val queue = session.createQueue("myapp.somequeue")
val producer = session.createProducer(queue)
val tempDest = session.createTemporaryQueue()
val respConsumer = session.createConsumer(tempDest)
val message = session.createTextMessage("marco")
message.setJMSReplyTo(tempDest)
message.setJMSCorrelationID("myCorrelationID")

// create actor system with CamelExtension
val camel = CamelExtension(system)
val camelContext = camel.context
camelContext.addComponent("activemq", ActiveMQComponent.activeMQComponent(brokerURL))
val listener = system.actorOf(Props[Frontend])

// send a message, expect a response
producer.send(message)
val resp: TextMessage = respConsumer.receive(5000).asInstanceOf[TextMessage]
assert(resp.getText() == "polo")

我为消费者演员尝试了两种不同的方法。第一个更简单，尝试使用sender !：

进行响应

class Frontend extends Actor with Consumer {
  def endpointUri = "activemq:myapp.somequeue"
  override def autoAck = false
  def receive = {
    case msg: CamelMessage => {
      println("received %s" format msg.bodyAs[String])
      sender ! "polo"
    }
  }
}

第二次尝试使用CamelTemplate回复：

class Frontend extends Actor with Consumer {
  def endpointUri = "activemq:myapp.somequeue"
  override def autoAck = false
  def receive = {
    case msg: CamelMessage => {
      println("received %s" format msg.bodyAs[String])
      val replyTo = msg.getHeaderAs("JMSReplyTo", classOf[ActiveMQTempQueue], camelContext)
      val correlationId = msg.getHeaderAs("JMSCorrelationID", classOf[String], camelContext)
      camel.template.sendBodyAndHeader("activemq:"+replyTo.getQueueName(), "polo", "JMSCorrelationID", correlationId)
    }
  }
}

我确实看到了我的actor接收方法的println()输出，因此ActiveMQ消息进入了actor，但是我在测试平台的respConsumer.receive()调用中得到了超时。我已经尝试了很多指定和不在回复中指定标题的组合。我还尝试过启用和停用autoAck。

提前致谢。

Answer 1

原来我需要在JMS代码中调用connection.start（）。

请求 - 回复akka-camel和ActiveMQ

1 个答案: