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Asked: 2024-10-12T05:51:18+05:30 In:

what is message queue in as400 and why do we use it?

Explain the Message queue (MSGQ) and its use in AS400 applications. What are the different types of message queues available for use in the AS400 system?

How can I send and receive messages through the message queue and what commands are used with the message queue?

as400

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  1. Admin
    This answer was edited.

    The message queue (MSGQ) receives all messages transmitted via the AS400 system. The user receives the message from the message queue (MSGQ) or the application linked to it. A reply to the related message is sent back to the user’s or program’s message queue once it has been received in the MSGQ. There are different types of message queues in as400, which are as follows:

    • Workstation Message Queue
    • User Profile Message Queue
    • Job Message Queue
    • System Operator Message Queue
    • History Log Message Queue

    Important points to consider:

    • Every workstation has a message queue (MSGQ) of its own.
    • There is a message queue (MSGQ) specific to each user profile.
    • Every job executing on the system possesses a unique message queue (MSGQ). An external message queue (*EX) MSGQ is given to each job, and a call message queue is assigned to each call made by the job to an Integrated Language Environment (ILE) procedure or an Original Program Model (OPM) program.
    • The system operator message queue (QSYSOPR) is accessible to the system operator.
    • History Log Message Queue is provided to the system history log (QHST).
    • System History Log (QHST) receives messages from the History Log Message Queue.