Scala 停止和重新启动嵌入式ActiveMQ时丢失消息

您好，我正在尝试编写一个测试用例来实现对activeMQ的故障转移支持

这是密码

val brokerA = createBroker("A")
brokerA.start
val failoverUrl = s"failover:(vm://BrokerA?create=false)" +
s"?randomize=false&maxReconnectAttempts=-1&reconnectSupported=true"


val cFactory = new ActiveMQConnectionFactory(failoverUrl)
val qConnection = getQueueConnection
val session = createQueueSession(qConnection)

private def totalReadMessagesCount(queueReceiver: QueueReceiver) = {
val messages = Iterator.continually(Option(queueReceiver.receive(2000))).takeWhile(_.isDefined).flatten.toSeq
messages.size
}

private def getReceiver = {
val queueConnection = getQueueConnection
queueConnection.start()
val queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE)
val queueReceiver = createQueueReceiver(queueSession, brokerA.getBrokerName)
queueReceiver
}

def getQueueConnection =cFactory.createQueueConnection("admin", "")

def createBroker(name:String) = {
val broker = new BrokerService()
val adaptor = new KahaDBPersistenceAdapter()
broker.setBrokerName("Broker" + name)
broker.addConnector(getBrokerUrl)
broker.setPersistent(true)
broker.setUseJmx(false)
broker.setUseShutdownHook(false)
broker
}

def getBrokerUrl =  "tcp://localhost:0"


val queueReceiver: QueueReceiver = getReceiver
val messageCount = 500
(1 to messageCount) map {count =>
  //Calling method to send message to ActiveMQ
  if(count == 200){
    brokerA.stop()
    brokerA.waitUntilStopped()
    brokerA.start(true)
  }
}
val totalCount = totalReadMessagesCount(queueReceiver)
println(s"Read ${totalCount} messages")
assert(totalCount == messageCount)

我可以在重新启动后重新连接activeMQ，但是

totalCount

显示的是300而不是500。以前的消息似乎丢失了。但是，当我在非嵌入式模式下运行相同的场景时。我能收到所有的信息

---

请帮助我如何防止在重新启动嵌入式活动mq时丢失任何消息

您必须将persistent设置为true，我不知道scala，但这里是java代码

public BrokerService broker() throws Exception {
    final BrokerService broker = new BrokerService();
    //broker.addConnector("tcp://localhost:61616");
    broker.addConnector("stomp://localhost:61613");
    broker.addConnector("vm://localhost");
    PersistenceAdapter persistenceAdapter = new KahaDBPersistenceAdapter();
    File dir = new File(System.getProperty("user.home") + File.separator + "kaha");
    if (!dir.exists()) {
        dir.mkdirs();
    }
    persistenceAdapter.setDirectory(dir);
    broker.setPersistenceAdapter(persistenceAdapter);
    broker.setPersistent(true);
    return broker;
}

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我刚刚更新了我的示例。我已将坚持变为真实，并添加了KahaDB。但现在我的人数是305。有什么建议吗？您已经创建了KahaDBPersistenceAdapter的实例，但没有将其设置为broker no？？像这个broker.setPersistenceAdapter（适配器）；您需要有2（两）个activeMQ实例来测试故障转移。故障转移意味着，如果客户端无法与给定服务器通信，它将尝试连接字符串中服务器列表中的下一个服务器。连接字符串中只有一台服务器。请参阅此处的文档：