What is PCF in MQ?
The purpose of IBM® MQ programmable command format (PCF) commands is to allow administration tasks to be programmed into an administration program. In this way you can create queues and process definitions, and change queue managers, from a program.
What is IBM MQ MQI?
An IBM MQ MQI client is a component that allows an application running on a system to issue MQI calls to a queue manager running on another system. The output from the call is sent back to the client, which passes it back to the application.
What is MQ architecture?
The simplest IBM MQ architectures involve the configuration and use of a single queue manager. Architectures based on multiple queue managers. You can use distributed message queuing techniques to create an IBM MQ architecture involving the configuration and use of multiple queue managers.
What is queue Manager object?
Queue managers define the properties of IBM® MQ objects. The values of these properties affect the way in which IBM MQ processes these objects. You create and manage objects using IBM MQ commands and interfaces. From your applications, you use the Message Queue Interface (MQI) to control objects.
How will you define a remote queue definition in QMB queue Manager?
A remote queue definition is used to resolve a queue name to a transmission queue to an adjacent queue manager. Note: The dashed outline represents a remote queue definition. This queue is not a real queue, but a name alias that is controlled as though it were a real queue.
What are channels in MQ?
A channel is a logical communication link, used by distributed queue managers, between an IBM® MQ MQI client and an IBM MQ server, or between two IBM MQ servers. Channels are objects that provide a communication path from one queue manager to another.
What language is IBM MQ written in?
IBM MQ provides two Java language interfaces: IBM MQ classes for Java Message Service and IBM MQ classes for Java. IBM MQ provides C++ classes equivalent to IBM MQ objects and some additional classes equivalent to the array data types.
How many types of queues are there in MQ?
four different types
MQ queues can be thought of as conduits to transport messages between Queue Managers. There are four different types of MQ queues and one related object. The four different types of queues are: Local Queue (QL), Remote Queue (QR), Transmission Queue (TQ), and Dead Letter Queue, and the related object is a Channel (CH).
What is remote and local queue in MQ?
When an Adapter connects to a remote queue manager and accesses one of its queues, then that queue, is also a local queue. In WebSphere MQ terms, a remote queue is a queue that is managed by a queue manager other than the one to which the application (in this case, the Adapter) is connected.
What are types of queues in MQ?
An IBM MQ queue is a named object on which applications can put messages, and from which applications can get messages….For a full description of these attributes, see Attributes for queues.
- Local queues.
- Remote queues.
- Alias queues.
- Dynamic and Model queues.
- Defining queues.
- Queues used by IBM MQ.
How many types of MQ are there?
There are four different types of MQ queues and one related object. The four different types of queues are: Local Queue (QL), Remote Queue (QR), Transmission Queue (TQ), and Dead Letter Queue, and the related object is a Channel (CH).
What is requester channel in MQ?
A Requester channel is a message channel that the queue manager uses to receive messages from other queue managers. A Requester channel can request the partner channel defined at the remote end to start.
What is channel name in IBM MQ?
What is the difference between message and channel?
A message queue stores messages sent by producers so that they can be delivered to consumers. A channel is the media or communication link for transmitting messages from producer to queue, queue to consumer, or one queue in a queue manager to another queue in another queue manager.
Is IBM MQ push or pull?
In the first option, new messages are “pushed” to the receiving application in the form of a direct notification. In the second option, the receiving application chooses to “pull” new messages itself by checking the queue at regular intervals.
How do I use PCF with MQI?
Use the normal Message Queue Interface (MQI) calls, MQPUT, MQGET, and so on, to put and retrieve PCF command and response messages to and from their queues. Ensure that the command server is running on the target queue manager for the PCF command to process on that queue manager.
What are the fields in the IBM MQ Message Descriptor?
The IBM MQ message descriptor is fully documented in MQMD – Message descriptor . A PCF command message contains the following fields in the message descriptor: Any valid value, as required. This field must be MQMT_REQUEST to indicate a message requiring a response.
How are the PCF parameters sent?
Each command and its parameters are sent as a separate command message containing a PCF header followed by a number of parameter structures; for details of the PCF header, see MQCFH – PCF header, and for an example of a parameter structure, see MQCFST – PCF string parameter.