MQSeries.net :: View topic - MQCMIT MQBACK

nr_shan · Posted: Sat Jun 07, 2008 7:49 pm Post subject:

Hi,

I wrote a ESQL/C program to read the Logical group of Messages (UOW) from my Local Queue.

Please find my sample ESQL/C code.

During Compilation and Execution i didnt get error in MQBEGIN(); function.
During runtime if there is any error, am just executing MQBACK(); function to put back whatever messages read by my program, at this time am getting Connection Handler Error.

When i browse my Local-Queue i can see only less number of messages in UOW, i.e., whatever messages read by my program were not written back to the local Queue.

kindly help me to resolve this issue.

=======================

MQCONN();

Options= MQOO_INPUT_SHARED + MQOO_FAIL_IF_QUIESCING;
MQOPEN();

gGetCompCode = MQCC_OK;

While(gGetCompCode != MQCC_FAILED)
{
lBeginOptions.Version = MQBO_CURRENT_VERSION;
MQBEGIN();

gGetMsgOptn.Options = MQGMO_WAIT + MQGMO_CONVERT +
MQGMO_ACCEPT_TRUNCATED_MSG;

memcpy(gMsgDesc.MsgId, MQMI_NONE, sizeof(gMsgDesc.MsgId));
memcpy(gMsgDesc.CorrelId, MQCI_NONE, sizeof(gMsgDesc.CorrelId));
memcpy(gMsgDesc.GroupId, MQCI_NONE, sizeof(gMsgDesc.GroupId));
memcpy(gMsgDesc.Format,MQFMT_STRING, (size_t)MQ_FORMAT_LENGTH);

MQGET();
if any error then
MQBACK();
exit program;
endif

while(gCompCode != MQCC_FAILED)
{
gMsgDesc.Version = MQMD_VERSION_2;
gGetMsgOptn.Version = MQGMO_VERSION_2;
memcpy(gMsgDesc.Format,MQFMT_STRING, (size_t)MQ_FORMAT_LENGTH);
gGetMsgOptn.Options = MQGMO_ACCEPT_TRUNCATED_MSG + MQGMO_WAIT + MQGMO_CONVERT ;
gGetMsgOptn.MatchOptions = MQMO_MATCH_GROUP_ID;
gGetMsgOptn.WaitInterval = 1000;
MQGET();
if any error then
MQBACK();
exit program;
endif

}

MQCMIT();

}

MQCLOSE();

Regards,
Ravi