使用 IBM MQ 类浏览、读取和移除队列中的消息

2022-01-21 00:00:00 queue java ibm-mq

我正在使用 Eclipse 的 Java MQ 类编写一个简单的 Java 应用程序.

I'm writing a simple Java application using MQ classes for Java with Eclipse.

现在我可以浏览远程队列而无需删除存储的消息.
下面是阅读循环的代码:

Right now I'm able to browse a remote queue without removing the messages stored.
Here is the code of the reading cycle:

MQQueueManager QMgr = new MQQueueManager(qManager); //<-- qManager is a String with the QMgr name

int openOptions = MQC.MQOO_FAIL_IF_QUIESCING | MQC.MQOO_INPUT_SHARED | MQC.MQOO_BROWSE;  

MQQueue queue = QMgr.accessQueue(queueName, openOptions);

MQMessage theMessage    = new MQMessage();
MQGetMessageOptions gmo = new MQGetMessageOptions();
    gmo.options=MQC.MQGMO_WAIT | MQC.MQGMO_BROWSE_FIRST;
    gmo.matchOptions=MQC.MQMO_NONE;
    gmo.waitInterval=5000;

boolean thereAreMessages=true;
while(thereAreMessages){
    try{
        //read the message          
        queue.get(theMessage,gmo);  
        //print the text            
        String msgText = theMessage.readString(theMessage.getMessageLength());
        System.out.println("msg text: "+msgText);

                 // <--- Solution code Here

        //move cursor to the next message               
        gmo.options = MQC.MQGMO_WAIT | MQC.MQGMO_BROWSE_NEXT;

    }catch(MQException e){

        if(e.reasonCode == e.MQRC_NO_MSG_AVAILABLE) {
            System.out.println("no more message available or retrived");
        }

        thereAreMessages=false;
    } catch (IOException e) {
        System.out.println("ERROR: "+e.getMessage());
    }
}

主要问题:在读取消息行之后，将光标移动到下一条消息之前，如何从队列中删除消息?

Main question: After the read message line and before moving the cursor to the next message how can I remove the message from the queue?

次要问题:Eclispe 警告我，所有用于选项的成本都已弃用；哪些是正确的?

Secondary question: Eclispe is warning me that all the costants used for the options are deprecated; which are the correct ones to use?

解决方案:

这里是我真正想要的解决方案:

Here the solution I'm really looking for:

// set te cursor to remove the message from the queue
gmo.options = CMQC.MQGMO_MSG_UNDER_CURSOR;
queue.get(theMessage, gmo);

这些行必须插入问题代码中

these lines have to be inserted in the question code

我在这里找到了它:http://www.velocityreviews.com/forums/t124676-mq-series-messages-browse-and-delete.html

推荐答案

解决方案:

这里是我真正想要的解决方案:

Here the solution I'm really looking for:

// set te cursor to remove the message from the queue
gmo.options = CMQC.MQGMO_MSG_UNDER_CURSOR;
queue.get(theMessage, gmo);

这些行必须插入问题代码中

these lines have to be inserted in the question code

我在这里找到了它:http://www.velocityreviews.com/forums/t124676-mq-series-messages-browse-and-delete.html

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