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| Problems reading MQCFT_GROUP data in Command Event Queue |
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Message
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| JKulcyk |
 Posted: Thu Sep 29, 2011 8:52 am Post subject: Problems reading MQCFT_GROUP data in Command Event Queue |
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Novice
Joined: 24 Apr 2009
Posts: 16
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I am trying to interpret data from event queues. I am able to process messages from the CONFIG, LOGGER, PERFM and QMGR Event queues, but am having troubles with the COMMAND queue.
The message from the command queue says it has two parameters. The first is a MQCFT_GROUP parm of type MQGACF_COMMAND_CONTEXT. It returns a getValue() of 9. This matches with the number of parameters the manual says are in the MQGACF_COMMAND_CONTEXT group (1). I am having problems figuring out how to access those group parameters. When I do a PCFParameter.nextParameter(Message) it skips over the group parameters and takes me to the next group parameter MQGACF_COMMAND_DATA. I did not think I could skip over the group elements (2).
Is anyone able to tell me where I am going wrong trying to read those group parameters? I would think I would be able to read them into another PCFParameter or MQCFGR structure. The main body of the code is below, if the full runnable code helps let me know and I can post that.
Thanks in advance,
-John
| Code: |
while (queue.getCurrentDepth() > 0) {
MQMessage Message = new MQMessage();
MQGetMessageOptions gmo = new MQGetMessageOptions();
queue.get(Message, gmo);
int msgType1 = Message.messageType;
MQCFH cfh = new MQCFH(Message);
int msgType = cfh.getType();
int msgLength = cfh.getStrucLength();
int msgVersion = cfh.getVersion();
String msgFormat = Message.format;
int msgCommand = cfh.getCommand();
int msgSeqNumber = cfh.getMsgSeqNumber();
int msgControl = cfh.getControl();
int msgCompCode = cfh.getCompCode();
int msgReason = cfh.getReason();
int msgParmCount = cfh.getParameterCount();
System.out.format("Message format: %s %n", msgFormat);
System.out.format("Message type: %d %d %s %n",
msgType1, msgType,
MQConstants.lookup(msgType, "MQCFT_.*"));
System.out.format("Message command: %s %n",
MQConstants.lookup(msgCommand, "MQCMD_.*"));
System.out.format("Message reason: %s %n",
MQConstants.lookupReasonCode(msgReason));
System.out.format("Message length: %d %n", msgLength);
System.out.format("Message version: %d %n", msgVersion);
System.out.format("Message seq num: %d %n", msgSeqNumber);
System.out.format("Message control: %s %n",
MQConstants.lookup(msgControl, "MQCFC_.*"));
System.out.format("Message comp code: %s %n",
MQConstants.lookup(msgCompCode, "MQCC_.*"));
System.out.format("Message # parms: %d %n", msgParmCount);
PCFParameter p;
String parmString;
for (int i = 0; i < cfh.getParameterCount(); i++) {
p = PCFParameter.nextParameter(Message);
int parmType = p.getType();
int parmCode = p.getParameter();
switch (parmType) {
case MQConstants.MQCFT_STRING:
parmString = p.getStringValue();
break;
case MQConstants.MQCFT_BYTE_STRING:
parmString = p.getStringValue();
break;
case MQConstants.MQCFT_INTEGER:
parmString = ConstantXlate.intXlate(parmCode,
(Integer) p.getValue());
break;
case MQConstants.MQCFT_INTEGER_LIST:
parmString = ConstantXlate.intListXlate(parmCode,
(int[]) p.getValue());
break;
case MQConstants.MQCFT_STRING_LIST:
parmString = ConstantXlate.strListXlate(parmCode,
(String[]) p.getValue());
break;
case MQConstants.MQCFT_GROUP:
// NEED HELP HERE
parmString = "Working on it " + p.getValue() + " " + p.getParameterName();
break;
default:
System.out.println("Paramater: " + p.getType() + " "
+ MQConstants.lookup(p.getType(), "MQCFT_.*"));
parmString = p.getStringValue();
}
System.out.println("");
}
}
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(1) http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/index.jsp?topic=%2Fcom.ibm.mq.csqzax.doc%2Fmo11490_.htm
(2) Pg 24/26 http://www.gse-nordic.org/Working%20Groups/GNRC/Conferences/2005/WMQ%20Stream/s61 |
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| markt |
| Posted: Thu Sep 29, 2011 11:37 am Post subject: |
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Knight
Joined: 14 May 2002
Posts: 508
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Groups can be iterated through as well. This code fragment deals with events that are known to have a max of two layers of group. The original I cut and sanitised this from does work, even if this won't compile!
| Code: |
while ((p = PCFParameter.nextParameter(msg)) != null) {
if (p instanceof MQCFGR) {
MQCFGR g = (MQCFGR) p;
for (Enumeration e = g.getParameters(); e.hasMoreElements();) {
p = (PCFParameter) e.nextElement();
// These messages only have 2 layers nested group, so we don't need to
// get recursive. Other uses may need recursion
if (p instanceof MQCFGR) {
MQCFGR g2 = (MQCFGR) p;
print p ...
U.debug("Found embedded group " + g2.getParameterName());
for (Enumeration e2 = g2.getParameters(); e2.hasMoreElements();) {
PCFParameter p2 = (PCFParameter) e2.nextElement();
pn = p2.getParameterName();
U.debug("Reading parameter " + pn);
print p2 ...
}
} else {
print p ...
}
}
} else {
print p...
}
}
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| JKulcyk |
| Posted: Wed Oct 05, 2011 6:07 am Post subject: Problems reading MQCFT_GROUP data in Command Event Queue |
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Novice
Joined: 24 Apr 2009
Posts: 16
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Markt - Thanks for the code snippet, it works great! Should we ever find ourselves in the same location, your beer is on me. 
Still slogging through some details, but things are looking much better, thanks again.
-John |
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