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Chapter 2
Tuxedo also provides a server called TMQFORWARD, which dequeues a message and
forwards it to other services. Messages can be retrieved in any of several ordering
schemes, including Last In, First Out (LIFO), First In, First Out (FIFO), priority order,
and time-based order. More than one client or server can access the same queue. In
Chapter 3, Development of Tuxedo – Various APIs, I have discussed the Tuxedo queue
in more detail; I am avoiding repetition, so please refer to the Queues (Tuxedo /Q)
section of that chapter.
There are three primary tasks for a Tuxedo administrator to carry out. They are
configuring, maintaining, and monitoring the Tuxedo queue.
Configuration of resources for /Q
There are three servers (TMS, TMQUEUE, and TMQFORWARD) provided by the Tuxedo
system that need to be configured in the SERVER section of the UBBCONFIG file.
Also, there must be a server group defined for each queue space as per the
application usage or design. The TMSNAME and OPENINFO parameters need to be set
accordingly; please see the following example in the UBBCONFIG file:
*GROUPS
TMQUEUE-G1
GRPNO=1 TMSNAME=TMS_QM
OPENINFO="TUXEDO/QM:/dev/deviceONE:QueueSpace1"
*SERVERS
TMQUEUE SRVGRP="TMQUEUE-G1" SRVID=1550 RESTART=Y GRACE=0 \
CLOPT="-s CUSTOMER:TMQUEUE"
In this example, the -s flag of the CLOPT parameter is used to name the queue space
served by a given instance of the server.
We mentioned that the environment variable for the queue (/Q)
is QMCONFIG, which needs to be set in the environment.
Creation of queue space and queues
To use a queue, we need to create the queue devices, queue space, and queues, in
that order; qmadmin is the tool provided by the Tuxedo system to do this for us.
%UnixPromt%> qmadmin
> crdl /home/applicationQ/CustomerQdev 0 500
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