如何浏览一个WebSphere MQ消息，而不删除它？ [英] How do I browse a Websphere MQ message without removing it?

问题描述

我在写一个.NET Windows窗体应用程序将信息发送给WebSphere MQ队列，然后查询不同的队列响应。如果响应返回，应用程序将部分地实时处理的响应。但反应需要保持在队列中，以便每日批处理作业，这也读取响应队列，可以做的处理的其余部分。

I'm writing a .NET Windows Forms application that will post a message to a Websphere MQ queue and then poll a different queue for a response. If a response is returned, the application will partially process the response in real time. But the response needs to stay in the queue so that a daily batch job, which also reads from the response queue, can do the rest of the processing.

我就得到了作为阅读邮件。我一直无法弄清楚是怎么读它而不移除它。

I've gotten as far as reading the message. What I haven't been able to figure out is how to read it without removing it.

下面是我有这么远。我是一个MQ新手，所以任何建议将AP preciated。并随时在C＃中做出回应。

Here's what I've got so far. I'm an MQ newbie, so any suggestions will be appreciated. And feel free to respond in C#.

Public Function GetMessage(ByVal msgID As String) As MQMessage
    Dim q = ConnectToResponseQueue()
    Dim msg As New MQMessage()
    Dim getOpts As New MQGetMessageOptions()
    Dim runThru = Now.AddMilliseconds(CInt(ConfigurationManager.AppSettings("responseTimeoutMS")))
    System.Threading.Thread.Sleep(1000) 'Wait for one second before checking for the first response'
    While True
        Try
            q.Get(msg, getOpts)
            Return msg
        Catch ex As MQException When ex.Reason = MQC.MQRC_NO_MSG_AVAILABLE
            If Now > runThru Then Throw ex
            System.Threading.Thread.Sleep(3000)
        Finally
            q.Close()
        End Try
    End While
    Return Nothing 'Should never reach here'
End Function

注意：我没有验证，我的code其实除去该消息。但是，这是我所理解的MQ工作，这似乎是发生了什么。请纠正我，如果这不是默认的行为。

NOTE: I haven't verified that my code actually removes the message. But that's how I understand MQ to work, and that appears to be what's happening. Please correct me if that's not the default behavior.

推荐答案

您需要打开与MQOO_BROWSE选项队列。然后在你的第一次读你使用MQGMO_BROWSE_FIRST选项GET。最后，你后续的GET的应该使用MQGMO_BROWSE_NEXT选项。

You need to open the queue with MQOO_BROWSE option. Then on your first read you do a GET using the MQGMO_BROWSE_FIRST option. Finally, your subsequent GET's should use the MQGMO_BROWSE_NEXT option.

注：MQOO是MQ打开选项和MQGMO是MQ获取消息选项

Note: MQOO is MQ open options and MQGMO is MQ Get Message Options.

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