How to tpenqueue/tpdequeue structures

Question

Hello All,
I was able to execute the qsample of Tuxedo. The example works well for me. Now
I want the client to enqueue a request to the Tuxedo server ... but this time
rather than a string, it enqueues a structure. I have written the VIEW FILE for
this structure and also the FIELD HEADER file for this structure. I am also able
to send this structure to the server using the tpinit method and get it back
successfully. But I want to know how to send this structure to the server using
the tpenqueue method and then get it back using tpdequeue method.
I tried the following code but it did not work for me ...
struct Person p = (struct Person ) tpalloc("VIEW", "Person", sizeof(struct
Person));
qctl.flags = TPQREPLYQ;
strcpy(qctl.replyqueue, "RPLYQ");
qctl.flags |= TPQDELIVERYQOS;/* specify delivery quality of service */
qctl.delivery_qos = TPQQOSNONPERSISTENT;
tpenqueue("QSPACE", "STRING", (TPQCTL *)&qctl, (char* )p, 0, 0) == -1)
qctl.flags = TPQWAIT;
tpdequeue("QSPACE", "RPLYQ", (TPQCTL *)&qctl, (char **)&p, &len, TPNOTIME);
printf("The first name of the person is %s\n", p->first_name);
printf("The last name of the person is %s\n", p->sur_name);
printf("The age of the person is %d\n", p->age);
tpfree((char *)p);
tpterm();
return(0);
I got the error message
Failure to dequeue STRING service: TPEDIAGNOSTIC - function failed - check
diagnostic value
Queue manager diagnostic -8
regards,
Abhishek.

Answer 1

thanks to you scott for your reply.
> request to the server using tpinit. Tpinit does not send a request, so
> perhaps that test case was not working either. You will need to use
> tpcall to actually send the request.
Oh sorry for the typo I meant to type tpcall. The example is working
perfectly with tpcall.
but if I try to use queue it doesn't work.
I am attaching the code of my example.... Please have a look at it and
let me know why it doesn't work.
I will be very gratefull for your help.
regards,
Abhishek.
Scott Orshan wrote:
Abhishek,
Do you have TMQFORWARD running, to automatically call your server when a
message is enqueued? That is the only way that a reply will appear on
the reply queue.
If you just want to test /Q, then change your tpdequeue to dequeue from
the STRING queue. You will then read the message that you just enqueued.
If you are using TMQFORWARD, and you are still not seeing a reply,
check the ULOG, and check the failure queue if you have one, in case the
service failed. The standard server that coomes with qsample will not
work with VIEWS, as it tries to run the toupper loop on all of the bytes
of the request, and this will scramble the data.
In your description, you indicated that you successfully sent the
request to the server using tpinit. Tpinit does not send a request, so
perhaps that test case was not working either. You will need to use
tpcall to actually send the request.
Scott Orshan
Abhishek Srivastava wrote:
Hello All,
I was able to execute the qsample of Tuxedo. The example works well
for me. Now I want the client to enqueue a request to the Tuxedo
server ... but this time rather than a string, it enqueues a
structure. I have written the VIEW FILE for this structure and also
the FIELD HEADER file for this structure. I am also able to send this
structure to the server using the tpinit method and get it back
successfully. But I want to know how to send this structure to the
server using the tpenqueue method and then get it back using tpdequeue
method.
I tried the following code but it did not work for me ...
struct Person p = (struct Person ) tpalloc("VIEW", "Person",
sizeof(struct Person));
qctl.flags = TPQREPLYQ;
strcpy(qctl.replyqueue, "RPLYQ");
qctl.flags |= TPQDELIVERYQOS;/* specify delivery quality of service */
qctl.delivery_qos = TPQQOSNONPERSISTENT;
tpenqueue("QSPACE", "STRING", (TPQCTL *)&qctl, (char* )p, 0, 0) == -1)
qctl.flags = TPQWAIT;
tpdequeue("QSPACE", "RPLYQ", (TPQCTL *)&qctl, (char **)&p, &len,
TPNOTIME);
printf("The first name of the person is %s\n", p->first_name);
printf("The last name of the person is %s\n", p->sur_name);
printf("The age of the person is %d\n", p->age);
tpfree((char *)p);
tpterm();
return(0);
I got the error message
Failure to dequeue STRING service: TPEDIAGNOSTIC - function failed -
check diagnostic value
Queue manager diagnostic -8
regards,
Abhishek.
[person_que.tar.gz]