Hi,
Your code looks fine, except you are doing a programming no-no. I don't
like the following line:
memcpy(md.CorrelId, "COR1", sizeof(md.CorrelId));
The string "COR1" is only 4 bytes (memcpy does not copy the NULL) but you
are copying 24 bytes (because sizeof(md.CorrelId) is 24). Therefore, you
are copying 20 bytes of garbage. You should setup a define to hold the
string plus ALL blank padding.
i.e.
#define COR1 "COR1 " // COR1 with 20 blanks
Then your memcpy would look like:
memcpy(md.CorrelId, COR1, sizeof(md.CorrelId));
By the way, just to clean up your code, change the following:
memcpy(md.GroupId,MQMI_NONE , sizeof(md.GroupId));
to
memcpy(md.GroupId,MQGI_NONE , sizeof(md.GroupId));
later
Roger...
At 12:01 AM 1/16/2003, you wrote:
Hi all,
Let me explain the scenario
I have 3 MQ series client. All 3 clients post the messages on the same queue
.
The idea is, whoever posted the message only they should get the response
for that message.
To do that I group the messages by CorrelId,
For Client1 the CorrelId is COR1
Client2 the CorrelId is COR2
When is call MQGET function I should only the messages which are matching
The CorrelId.
This block of code is for getting message from Q.
memcpy(md.MsgId, MQMI_NONE, sizeof(md.MsgId));
memcpy(md.CorrelId, "COR1", sizeof(md.CorrelId));
memcpy(md.GroupId,MQMI_NONE , sizeof(md.GroupId));
md.Encoding = MQENC_NATIVE;
md.CodedCharSetId = MQCCSI_Q_MGR;
md.Version = MQMD_VERSION_2;
gmo.Version = MQGMO_VERSION_2;
gmo.MatchOptions = MQMO_MATCH_CORREL_ID ;
gmo.WaitInterval = 11000;
MQGET(Hcon, /* connection handle */
Hobj, /* object handle */
&md, /* message descriptor */
&gmo, /* get message options */
buflen, /* buffer length */
buffer, /* message buffer */
&messlen, /* message length */
&CompCode, /* completion code */
&Reason); /* reason code */
The MQGET just returned with out any error. It could not find the matching
CorrelId
I have attched the those 2 files which put the message and get the message.
Waiting for ur response
Thanks in Advance
Murugesan
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