使用 ActiveMQ 5.3 和 NMS 延迟交付

Question

我正在尝试使用 NMS 的新延迟交付功能。

已在配置文件中设置了 schedulerSupport 属性，我正在使用以下代码尝试延迟消息的传递，直到达到用户选择的日期/时间。

代码（目前似乎不起作用）如下：

var timeDelay = dateTimePicker.Value.Subtract(DateTime.Now).TotalMilliseconds;     
var message = topicPublisher.CreateTextMessage();
message.Properties["AMQ_SCHEDULED_DELAY"] = timeDelay;
message.Text = CM.ToXMLString();

topicPublisher.Send(message);

你能指出这个例子中可能不正确的地方吗？

非常感谢！

Answer 1

我没有从提供的代码中看到任何明显的东西。

您可以尝试在代理中打开日志以查看调度程序是否收到消息并且值是否正确，这也将确认您确实启用了调度程序支持。您也可以尝试创建一个小型 java 程序，该程序执行类似的操作以确定 NMS 客户端是否正常运行。

我假设你有一个消费者正在运行并且它的连接对象已经启动？

问候 蒂姆。

www.fusesource.com

Answer 2

感谢您对蒂姆的帮助。我找到了问题的原因。我的反应稍有延迟 - 我不得不专注于其他工作领域，但我今天设法回到了这一点。

问题在于 C# 的“.TotalMilliseconds”函数 - 它返回一个小数的 total.partial 毫秒值，很明显 ActiveMQ 不喜欢这个值。

现在我将此毫秒值转换为整数，延迟消息按要求工作。

日志摘录如下：

2011-03-07 10:14:44,186 | DEBUG | quasar adding destination: topic://REDACTED | org.apache.activemq.broker.region.AbstractRegion | ActiveMQ Transport: tcp:///REDACTED:50161
2011-03-07 10:14:44,576 | DEBUG | Error occured while processing async command: ActiveMQTextMessage {commandId = 4, responseRequired = false, messageId = ID:HL003323-50159-634350896828327757-0:0:1:1:1, originalDestination = null, originalTransactionId = null, producerId = ID:HL003323-50159-634350896828327757-0:0:1:1, destination = topic://REDACTED, transactionId = null, expiration = 0, timestamp = 1299492884437, arrival = 0, brokerInTime = 0, brokerOutTime = 0, correlationId = null, replyTo = null, persistent = false, type = null, priority = 4, groupID = null, groupSequence = 0, targetConsumerId = null, compressed = false, userID = null, content = null, marshalledProperties = org.apache.activemq.util.ByteSequence@1ae0436, dataStructure = null, redeliveryCounter = 0, size = 0, properties = {targetModule=HL.Services.Blackbird.OrderManager, AMQ_SCHEDULED_DELAY=53564.4233}, readOnlyProperties = false, readOnlyBody = false, droppable = false, text = <?xml version="1.0" encoding="utf-16"?>
<Com...mandMessage>}, exception: java.lang.NullPointerException | org.apache.activemq.broker.TransportConnection.Service | ActiveMQ Transport: tcp:///REDACTED:50161
java.lang.NullPointerException
        at org.apache.activemq.broker.scheduler.SchedulerBroker.send(SchedulerBroker.java:179)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:129)
        at org.apache.activemq.broker.CompositeDestinationBroker.send(CompositeDestinationBroker.java:96)
        at org.apache.activemq.broker.TransactionBroker.send(TransactionBroker.java:227)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:129)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:129)
        at org.apache.activemq.security.AuthorizationBroker.send(AuthorizationBroker.java:192)
        at org.apache.activemq.broker.MutableBrokerFilter.send(MutableBrokerFilter.java:135)
        at org.apache.activemq.broker.TransportConnection.processMessage(TransportConnection.java:462)
        at org.apache.activemq.command.ActiveMQMessage.visit(ActiveMQMessage.java:677)
        at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:311)
        at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:185)
        at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
        at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113)
        at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:228)
        at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
        at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220)
        at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202)
        at java.lang.Thread.run(Thread.java:595)
2011-03-07 10:14:44,577 | WARN  | Async error occurred: java.lang.NullPointerException | org.apache.activemq.broker.TransportConnection.Service | ActiveMQ Transport: tcp:///REDACTED:50161
java.lang.NullPointerException
        at org.apache.activemq.broker.scheduler.SchedulerBroker.send(SchedulerBroker.java:179)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:129)
        at org.apache.activemq.broker.CompositeDestinationBroker.send(CompositeDestinationBroker.java:96)
        at org.apache.activemq.broker.TransactionBroker.send(TransactionBroker.java:227)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:129)
        at org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:129)
        at org.apache.activemq.security.AuthorizationBroker.send(AuthorizationBroker.java:192)
        at org.apache.activemq.broker.MutableBrokerFilter.send(MutableBrokerFilter.java:135)
        at org.apache.activemq.broker.TransportConnection.processMessage(TransportConnection.java:462)
        at org.apache.activemq.command.ActiveMQMessage.visit(ActiveMQMessage.java:677)
        at org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:311)
        at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:185)
        at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
        at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113)
        at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:228)
        at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
        at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220)
        at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202)
        at java.lang.Thread.run(Thread.java:595)