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MQSeries.net Forum Index » General Discussion » How to read SYSTEM.ADMIN.XXX.EVENT

How to read SYSTEM.ADMIN.XXX.EVENT

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pmane

Posted: Sun Sep 08, 2002 10:17 pm Post subject: How to read SYSTEM.ADMIN.XXX.EVENT

Acolyte

Joined: 17 Oct 2001
Posts: 50

I am trying to read the SYSTEM.ADMIN.CHANNEL.EVENT QUEUE in Java.
I am not able to open it as it says it is in use. Can't I check for the events.
My options are
qMgr = new MQQueueManager(qManager);
int openOptions = MQC.MQOO_INPUT_SHARED | MQC.MQOO_BROWSE ;

pmane

Posted: Mon Sep 09, 2002 2:03 am Post subject:

Acolyte

Joined: 17 Oct 2001
Posts: 50

Just got an additional info about the PCF commands. But I am unable to get a sample source code that can read EVENT queu using PCF command. Do we need PCF command to read the EVENT QUEUE ? as I do find MQCMD_PERFM_EVENT in CMQCFC Java class

nimconsult

Posted: Mon Sep 09, 2002 11:00 pm Post subject:

Master

Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium

Most probable cause is that another process has opened the queue in exclusive mode (which is by the way the default open option on event queues if I remeber well). You may have a monitoring agent already running on your queue manager.

If it is not the case, can you be more specific on the type of error and reason code you receive in your application?
_________________
Nicolas MarÃ©chal
Senior Architect - Partner

NIMCONSULT Software Architecture Services (Belgium)
http://www.nimconsult.be

pmane

Posted: Tue Sep 10, 2002 12:48 am Post subject:

Acolyte

Joined: 17 Oct 2001
Posts: 50

My error was MQJE001 : Completion code 2 and reason code 2042. I am not using any other event monitoring tool. But not I have a improvement , this error comes only some times. Other wise my program works fine. Have any idea if any other process might use event queues in exec mode ? Below is my code
import java.io.*;
import com.ibm.mq.*;
import com.ibm.mq.pcf.*;
import java.util.*;
import java.text.*;

public class ChannelMonitorNew {

/**
* For testing only.
*/
public static void main(String[] args) {

try {

String qManager = "GLANSERGW.QUEUE.MANAGER";
MQQueueManager qMgr;

java.util.Hashtable properties;

qMgr = new MQQueueManager(qManager);

MQQueue mqqueue =
qMgr.accessQueue("SYSTEM.ADMIN.CHANNEL.EVENT", 8201);

MQGetMessageOptions mqgetmessageoptions = new MQGetMessageOptions();
mqgetmessageoptions.matchOptions = 0;
mqgetmessageoptions.waitInterval = 333;
mqgetmessageoptions.options = 8225;
boolean flag = false;

int i = 0 ;
while(true){

MQMessage mqmessage = new MQMessage();
mqqueue.get(mqmessage, mqgetmessageoptions);
System.out.println("Got an event message!");
SimpleDateFormat simpledateformat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
GregorianCalendar eventTime = ((MQMD) (mqmessage)).putDateTime;
PCFMessage pcfeventmessage = new PCFMessage(mqmessage);
System.out.println("--------------------" + "EVENT:" + i + "----------------" + "\n" +
"Time:" + simpledateformat.format(eventTime.getTime()) + "\n" +
"Command: " + pcfeventmessage.getCommand() + "\n" +
"CompCode: " + pcfeventmessage.getCompCode() + "\n" +
"Reason: " + pcfeventmessage.getReason() + "\n" +
"Control:" + pcfeventmessage.getControl() + "\n" +
"ParameterCount" + pcfeventmessage.getParameterCount() + "\n");

if(pcfeventmessage.getReason() == CMQC.MQRC_CHANNEL_STARTED){

System.out.println(pcfeventmessage.getStringParameterValue(CMQCFC.MQCACH_CHANNEL_NAME) +
" on Transmission Queue : " +
pcfeventmessage.getStringParameterValue(CMQCFC.MQCACH_XMIT_Q_NAME) +
" with connection name :" +
pcfeventmessage.getStringParameterValue(CMQCFC.MQCACH_CONNECTION_NAME) +
" CHANNEL STARTED" + "\n") ;
}else
if(pcfeventmessage.getReason() == CMQC.MQRC_CHANNEL_STOPPED){

System.out.println(pcfeventmessage.getStringParameterValue(CMQCFC.MQCACH_CHANNEL_NAME) +
" on Transmission Queue : " +
pcfeventmessage.getStringParameterValue(CMQCFC.MQCACH_XMIT_Q_NAME) +
" with connection name :" +
pcfeventmessage.getStringParameterValue(CMQCFC.MQCACH_CONNECTION_NAME) +
" CHANNEL STOPPED" + "\n") ;
}else {
System.out.println("SOME OTHER CODE" + "\n") ;
}

//System.out.println("MESSAGE:" + pcfeventmessage.toString());
i++;

}

//mqqueue.close();
//qMgr.disconnect();

}
catch (Exception ex)
{
ex.printStackTrace();
}

}

}

nimconsult

Posted: Tue Sep 10, 2002 10:19 pm Post subject:

Master

Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium

Yes I have an idea: your application is blocking itself!

Try to reproduce this:
- make sure your event queue until you see an open input count 0.
- run your application.
- when the application ends look immediately at the open input count. Chance are great that open input count remains 1 for some seconds.
- if you restart your application immediately you fail to open the queue because the handle of the previous execution was not cleaned.

The first thing you should do is to close the queue and disconnect from the queue manager when you leave the application (a quick look at your code shows that the lines are currently commented). This gives more opportunity to MQ to clean the handles smoothly.
_________________
Nicolas MarÃ©chal
Senior Architect - Partner

NIMCONSULT Software Architecture Services (Belgium)
http://www.nimconsult.be

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