Difference between revisions of "MQCURMSGS()"

From Lianjapedia
Jump to: navigation, search
Line 1: Line 1:
 
==Purpose==
 
==Purpose==
 
Return the number of unread messages in the specified queue
 
Return the number of unread messages in the specified queue
 
  
 
==Syntax==
 
==Syntax==
 
MQCURMSGS(<expN>)
 
MQCURMSGS(<expN>)
 
  
 
==See Also==
 
==See Also==
 
[[MQCLOSE()]], [[MQCREATE()]], [[MQOPEN()]], [[MQRECEIVE()]], [[MQSEND()]], [[MQUNLINK()]], [[XML_DECODE()]], [[XML_ENCODE()]], [[XML_GATHER()]], [[XML_SCATTER()]]
 
[[MQCLOSE()]], [[MQCREATE()]], [[MQOPEN()]], [[MQRECEIVE()]], [[MQSEND()]], [[MQUNLINK()]], [[XML_DECODE()]], [[XML_ENCODE()]], [[XML_GATHER()]], [[XML_SCATTER()]]
 
  
 
==Description==
 
==Description==
Line 17: Line 14:
  
 
For more examples of handling message queues, please see the examples/mqueue programs in the software distribution.
 
For more examples of handling message queues, please see the examples/mqueue programs in the software distribution.
 
  
 
==Example==
 
==Example==
Line 39: Line 35:
 
mqclose(mqdes)
 
mqclose(mqdes)
 
</code>
 
</code>
 
  
 
==Products==
 
==Products==

Revision as of 13:02, 11 December 2012

Purpose

Return the number of unread messages in the specified queue

Syntax

MQCURMSGS(<expN>)

See Also

MQCLOSE(), MQCREATE(), MQOPEN(), MQRECEIVE(), MQSEND(), MQUNLINK(), XML_DECODE(), XML_ENCODE(), XML_GATHER(), XML_SCATTER()

Description

The MQCURMSGS() function returns the current number of unread messages in the open queue specified by <expN>. The <expN> is the pointer to a queue opened with MQCREATE() or MQOPEN().

The MQCLOSE() function is used to close a queue which has been opened with MQOPEN() or MQCREATE().

For more examples of handling message queues, please see the examples/mqueue programs in the software distribution.

Example

// Open up the queue for reading
mqdes=mqopen("/myqueue")
if (mqdes < 0)
    messagebox(strerror()+",errno="+alltrim(str(error())))
    return
endif
// do while there are messages
do while (mqcurmsgs(mqdes) > 0)
    // Get each message
    mstr=mqreceive(mqdes)
    if (empty(mstr))
        messagebox(strerror()+",errno="+alltrim(str(error())))
        return
    endif
    messagebox(mstr)
enddo
mqclose(mqdes)

Products

Lianja, Lianja Server