![]() ![]() Each queue manager uses one or more channels to send and receive data to other queue managers. The physical location of the queue manager is irrelevant, as long as it is reachable over the network.Ĭommunication between queue managers A network or "client" connection: applications using a client connection can connect to a queue manager on any other host in the network.Generally faster, but limited to programs running on the same physical host as the queue manager. Bindings: a direct software connection.Queue managers communicate with the outside world either through: As of version 8.0.0.4, MQ also supports the MQ Light API.Ĭlustering: Multiple MQ implementations share the processing of messages, providing load balancing. Range of APIs: It implements the Java Message Service (JMS) standard API, and also has its own proprietary API, known as the Message Queuing Interface (MQI), which preceded the JMS several years in existence. Message-driven architecture framework: IBM MQ allows receipt of messages to "trigger" other applications to run. Exits are compiled applications that run on the queue manager host, and are executed by the IBM MQ software at the time data transformation is needed. This is accomplished through the use of message data exits. Big Endian to Little Endian, or EBCDIC to ASCII. Ordering of all messages is preserved, by default this is in FIFO order of receipt at the local queue within priority of the message.ĭata transformation: e.g. If a message receiver application is not running when a sender sends it a message, the queue manager will hold the message until the receiver asks for it. Messages can be sent from one application to another, regardless of whether the applications are running at the same time. This quality of service typically prevents message loss or duplication.Īsynchronous messaging: MQ provides application designers with a mechanism to achieve non-time-dependent architecture. One-time delivery: MQ uses once and once only delivery. Python (programming language) interface PyMQI (originally developed by Les Smithson), available from PyPI.Perl interface (developed and contributed by Hildo Biersma), available from CPAN.IBM Message Queue Interface (MQI) for C, COBOL, PL/I, Java, Rexx, RPG, and C++Īdditional APIs (not officially supported) are also available via third parties, including:.MQ supports point-to-point and Publish-Subscribe messaging. Programs integrated with IBM MQ use a consistent application program interface (API) across all platforms. Queue managers handle storage, timing issues, triggering, and all other functions not directly related to the actual movement of data. Although not strictly required for message-oriented middleware, is an IBM MQ prerequisite. It is responsible for transferring data to other queue managers via message channels. Queue Manager: a system service that provides a logical container for the message queue. ![]() Queue: Message queues are objects that store messages in an application.As in other communication protocols, storage, routing, and delivery information is added to the message before transmission and stripped from the message prior to delivery to the receiving application. Message: Messages are collections of binary or character (for instance ASCII or EBCDIC) data that have some meaning to a participating program.MQ is available on a large number of platforms (both IBM and non-IBM), including z/OS ( mainframe), IBM i, Transaction Processing Facility, UNIX ( AIX, HP-UX, Solaris), HP NonStop, OpenVMS, Linux, and Microsoft Windows. ![]() MQ allows independent and potentially non-concurrent applications on a distributed system to securely communicate with each other, using messages. IBM MQ also has containerised deployment options. The products that are included in the MQ family are IBM MQ, IBM MQ Advanced, IBM MQ Appliance, IBM MQ for z/OS, and IBM MQ on IBM Cloud. It was originally called MQSeries, and was renamed WebSphere MQ in 2002 to join the suite of WebSphere products. IBM MQ is a family of message-oriented middleware products that IBM launched in December 1993. Family of message-oriented middleware products ![]()
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