PL/I example: Opening an existing queue

This extract is not taken from the sample applications supplied with IBM® MQ.

For the names and locations of the sample applications, see Using the sample procedural programs for z/OS®.

%INCLUDE SYSLIB(CMQP);
%INCLUDE SYSLIB(CMQEPP);
:
/*********************************************************/
/* WORKING STORAGE DECLARATIONS                          */
/*********************************************************/
DCL COMPCODE           BINARY FIXED (31);
DCL REASON             BINARY FIXED (31);
DCL HCONN              BINARY FIXED (31);
DCL HOBJ               BINARY FIXED (31);
DCL OPTIONS            BINARY FIXED (31);
⋮
DCL QUEUE_NAME         CHAR(48) INIT('PL1.LOCAL.QUEUE');
⋮
/*********************************************************/
/* LOCAL COPY OF OBJECT DESCRIPTOR                       */
/*********************************************************/
DCL 1 LMQOD  LIKE MQOD;
⋮
/*********************************************************/
/* SET UP OBJECT DESCRIPTOR FOR OPEN OF REPLY QUEUE      */
/*********************************************************/
LMQOD.OBJECTTYPE = MQOT_Q;
LMQOD.OBJECTNAME = QUEUE_NAME;
OPTIONS = MQOO_INPUT_EXCLUSIVE;

CALL MQOPEN (HCONN,
             LMQOD,
             OPTIONS,
             HOBJ,
             COMPCODE,
             REASON);
 
/*********************************************************/
/* TEST THE COMPLETION CODE OF THE OPEN CALL.            */
/* IF THE CALL HAS FAILED ISSUE AN ERROR MESSAGE         */
/* SHOWING THE COMPLETION CODE AND THE REASON CODE.      */
/*********************************************************/
     IF COMPCODE ¬= MQCC_OK
        THEN DO;
          ⋮
          CALL ERROR_ROUTINE;
        END;