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TIBCO Rendezvous® 8.7.0

# tibrvcmEvent_CreateListener()

Function

## Declaration

    tibrv_status tibrvcmEvent_CreateListener(
        tibrvcmEvent*           cmListener,
        tibrvQueue              queue,
        tibrvcmEventCallback    callback,
        tibrvcmTransport        cmTransport,
        const char*             subject,
        const void*             closure);

## Purpose

Listen for messages that match the subject, and request certified delivery when available.

Parameter | Description
`cmListener` | For each inbound message, place this listener event on the event queue. The program supplies a location, and the function stores the new listener object in that location. The event object remains valid until the program explicitly destroys it.
`queue` | For each inbound message, place the listener event on this event queue.
`callback` | On dispatch, process the event with this callback function.
`cmTransport` | Listen for inbound messages on this certified delivery transport.
`subject` | Listen for inbound messages with subjects that match this specification. Wildcard subjects are permitted. The empty string is not a legal subject name.
`closure` | Store this closure data in the event object.

## Activation and Dispatch

Details of listener event semantics are identical to those for ordinary listeners; see Activation and Dispatch.

## Inbox Listener

To receive unicast (point-to-point) messages, listen to a unique inbox subject name. First call tibrvTransport_CreateInbox() to create the unique inbox name; then call tibrvcmEvent_CreateListener() to begin listening. Remember that other programs have no information about an inbox until the listening program uses it as a reply subject in an outbound message.

## See Also

tibrvcmEvent

tibrvcmTransport_Destroy()

tibrvEvent_GetListenerSubject()

tibrvTransport_CreateInbox()

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