MQSeries.net :: View topic - Question about processing messages on a queue

nzr1949 · Posted: Wed Nov 17, 2004 1:14 am Post subject:

Hi guys,

I am a little stuck at the moment. What I'm trying to do is read each of the messages on a queue one at a time. I want to do it in browse mode so that I don't delete them as they are read. At the moment I have set all my options as follows:

// queue manager options
int openOptions = MQC.MQOO_INPUT_AS_Q_DEF | MQC.MQOO_OUTPUT
| MQC.MQOO_INQUIRE | MQC.MQOO_BROWSE;

// get message options
MQGetMessageOptions ops = new MQGetMessageOptions();
ops.options = MQC.MQGMO_WAIT | MQC.MQGMO_BROWSE_FIRST; ops.waitInterval = MQC.MQWI_UNLIMITED;

And the code that does the reading:-

//*****************************************************
int count = 0;

while (count < getNoMessages())
{
String filename = "";
this.myQueue.get(msg, ops);
filename = serverNamingConvention + "_" + count;
writeFile(msg, filename);
count++;
}
//*****************************************************

What I have managed to get working is to read the first message on the queue, which I managed by setting the message option MQC.MQGMO_BROWSE_FIRST. When I run the above code, it writes the first message on the queue to every file it creates. So, if there are four messages on the queue, it will create four files which all contain the same message data, which is the first one because that's what I specified. My problem is that I'm not sure how to modify my options so that it reads all the messages and writes each to a file (instead of always the first as it does now). Remember that I wish to do this in browse mode. What options do I need to change for my get message options and my queue manager options (if any)? Will these changes have any bearings on the code in the while() loop above?

Thanks