Why do we use mqseries

This topic includes the following sections:. The Insert control: MQSeries dialog-box is displayed. To specify connection settings for the MQSeries control, perform the following tasks see Figure :.

In the Authorization tab see Figure , specify user name and password for MQ authorization, perform the following tasks:. When you create a new instance of the MQSeries control, you create a new Control file in your project. The following is a sample control file for an MQSeries control:.

The example above was generated based on selecting a TCP connection type. The MQSeries control allows you to create your own send, receive, and security exits. To implement an Exit, you must define a new Java class that implements the appropriate interface. Three exit interfaces are defined in the WebSphere MQ package:. To implement MQSeries Exits, perform the following tasks:. UserExit; import com.

You may implement these interfaces in a single class or in separate classes, as required. Two modes of transaction management are supported by the MQSeries control. They both use the underlying MQSeries syncpoint feature. The two transaction management modes are:. Implicit transaction management is selected by default. The following diagram describes how an implicit transaction is handled by the MQSeries control. Using implicit transaction management prevents you from grouping several Get and Put functions together as a part of a transactional unit.

Each Get and Put are handled individually within a transaction boundary. Explicit transaction management is enabled when you choose not to use implicit transaction management while configuring the MQSeries control.

In the explicit transaction mode, you must set the transaction boundaries explicitly, using the Begin and Commit or Rollback MQSeries control functions.

Figure describes the process of creating a workflow using explicit transaction management. A Message Descriptor is an attribute representing a property of the message that is either being sent or received. Message properties can be the type of message, the message ID, and the message priority. Using the MQSeries control you can set Message Descriptors for each message while sending the message using the putMessage function.

You can also get the message descriptors of the messages retrieved from the queue. To send a message, select a putMessage function based on the data type of the message that you want to send:. The first parameter that is passed to the function is the message to be put into the queue. The second parameter that is passed to the function is the queue to which the message is sent. If a value is not provided at runtime, that is, if the value is null, the default queue name mentioned in the control property is used.

The values provided in this document are used for setting the MQMD attributes of the message being sent. If the MQMDHeadersDocument parameter is not provided, or if the parameter is null, the message is put into the queue with the default values for the message descriptors.

The following procedure describes how to add any MQSeries control putMessage function to a business process. Using the MQSeries control you can add messages to a remote queue managed by a remote queue manager. To do this, you must configure a transmission queue in the queue manager to which the MQSeries control is connected. To add a message to a remote queue managed by a remote queue manager you must drag and drop the following function, before the putMessage call in the workflow:.

String remoteQueueManager ;. The parameter to this function is the name of the remote queue manager. To set the value for this parameter, in the Design view, open the remoteQueueManager node.

In the Send Data tab, select or create a string variable, then enter the name of your remote queue manager as the default value. To revert to the default local queue manager to which your control is connected, in the Design view you must drag and drop the setRemoteQueueManager again in your workflow. On doing this, a default value, null, is passed as the parameter to this function. This null value or empty string reverts control back to the default queue manager.

To receive a message, select a get Message function based on the data type of the message that you want to receive:. The first parameter of the function, java. String queue , is the name of the queue from which the message is to be received.

If a value is not provided at runtime the value is null the default queue name mentioned in the control property is used. The values provided in this document are used to retrieve the message corresponding to the MQMD attributes specified in the document. If the MQMDHeadersDocument parameter is not provided, or if the parameter is null, the first message present in the queue is retrieved.

The return value of the function is the message obtained from the queue. The data type of the message depends on the getMessage function added. The values may be byte[], XmlObject, or String, depending on whether the message obtained is to be processed as a Binary, XML, or plain text message.

The following procedure describes how to add a MQSeries control getMessage function to a business process. This document was provided as input to the getMessageAsString function. You can send group messages using the MQSeries control putMessage function within a loop.

For the last message, the IsLastMessage element must be set to True. The Group Id assigned to the first message must be used for all the subsequent messages of the group. The MessageSequenceNumber of the first message of the group should be 1; the MessageSequenceNumber of the second message should be 2, and so on. You can retrieve group messages using the MQSeries control in a logical order.

To configure the MQSeries control to retrieve group messages in a logical order, set the logicalOrder attribute of the GroupMessage element to True. You can retrieve messages in a logical order only when you use explicit transaction mode.

The Figure depicts a sample workflow for retrieving group messages in logical order:. The logicalOrder attribute must be set to True in each call of the Get service, to retrieve the messages of the group in their logical order by message sequence number, beginning at one for the first message. Changing the logicalOrder attribute from True to False while getting group messages, when its value was True in the previous Get service call, changes the logical ordering. Setting the logicalOrder attribute to False or not providing this attribute in the Get request document means that the control gets the first message of the group as it appears on the queue irrespective of its message sequence number.

The following is an example of a Get Request MQMDHeaders document for retrieving group messages in logical order, and also waits for all messages in the group:. You can configure the MQSeries control to wait for all messages of the group to be present in the queue before retrieving any message within the group. You can set the waitForAllMsgs to True while retrieving the first message of the group.

After you retrieve the first message in the group, you can set this attribute to True again, for retrieving the other messages of the group, provided that you have also set the logicalOrder attribute to True. Setting the waitForAllMsgs attribute to False, or not providing this attribute in the Get Request document means that the control can still get group messages from the queue even when not all of the messages of the group are present in the queue.

GroupId is an optional element within the GroupMessage element. Its value may not be provided if the hexadecimal group ID of the group message is not known. When there are multiple group messages present in the queue, the first group message in the queue is retrieved. The GroupId value may be specified, if known. If specified and there are multiple group messages in the queue, the group message matching the group ID is retrieved.

Messages can be retrieved in this way only if the logicalOrder attribute value is False or is not provided. The group messages can still be retrieved in a loop by providing the GroupId and incrementing the MessageSequenceNumber by one in each Get function call in the loop, the MessageSequenceNumber of the first message being one. Format is a message descriptor attribute. Messages of a particular Format conform to a specific structure which depends on the Format type.

Using the MQSeries control you can send messages that correspond to built-in MQSeries formats and user-defined formats. This can only be done using the putMessageAsBytes function. To send a message that conforms to an MQSeries Format, you must add Java code to the business process file.

This is shown in the following examples. The field values given in this example can be modified as required. The actual message can be appended to the end of this byte array and can be Put into the MQSeries queue.

The byte array can be provided as the first parameter to the putMessageAsBytes function, which is added to the process. For more information on the putMessage function, see Sending and Receiving Messages.

The getIMSHeader function writes the fields present in the IMS header structure to a byte array output stream and returns an array of bytes. The values of the fields given in this example can be modified as required.

The actual message can be appended to the end of the byte array and can be Put into the MQSeries queue. The byte array can be provided as the first parameter to the putMessageAsBytes function, which is added to the business process file after the Perform node.

You can change the MQSeries control properties dynamically at runtime. This document conforms to the MQDynamicProperties schema which is available in the jpdpublic. To change properties dynamically, perform the following tasks. The following is a sample MQDynamicProperties document.

MQ is in between, passing information to SAP and SAP will give the reply back on the mobile banking app, like when a customer asks for a one-time password.

Our primary use case for pushing data as a queuing mechanism for all the applications to send out messages. We use it as a pipeline. We also use it to publish data and for the application to extract it all. It's predominantly for message queuing, to assure delivery. Our team manages messaging aspects with this product, among others.

We develop applications for 20 companies in the insurance industry. We have about 20 different product systems that use the same MQ layout. We are also using it for testing and educational purposes.

Our customer base is in the closed market of Switzerland and Liechtenstein. We are currently switching versions from 8. In our company, it's the main hub for our whole CRM solution. MQ manages things through the Broker. We use it for all our integration cases, including the integration of core applications within our company and external solutions from our partners. There are a couple of projects where we are using MQ heavily. It is on-premises right now. We are looking to move to the cloud in the future.

For 90 percent of our applications, we are using IBM MQ for a point-to-point setup, from one application to another application. It is like a passage between them. For the other 10 percent of our applications, we are using topic subscriptions.

It's deployed on-premises. We have tried it on Docker Containers as well, where we have an instance. We haven't done a cluster setup using Docker and Kubernetes. We use it for file transfer and batch processing.

We upload electronic documents to the Chilean government. We use version M Model B and our clients use version 7. All our applications run around MQ. We run a backend system working with a mainframe and we distribute records via MQ. We are using it daily. We use it for message transfer, mostly for a queue of the messages. Sometimes, we also consider using the topic space solution. But it is mostly for transferring messages between two applications. The applications are located in a different country, so it is also used for communication of MQ to MQ.

We mainly use it for exchanging messages between application servers, back applications e. We are mainly using it for communication, for connecting to multiple systems. We then process them and send back the response.

We are a bank whose core banking system is not so advanced. Credit Card system is are deployed on IBM mainframes. Minimize the point to point connectivity. Otherwise, that might not be good enough 'real time' response for today's and very soon in the future Internet of Things IOT requirements.

FRAM runs at clock speed and FPGA devices can be reprogrammed on the fly adding and taking away however many independent parallel data streams are needed within established constraints of course. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What is an MQ and why do I want to use it?

Ask Question. Asked 11 years, 5 months ago. Active 6 years, 7 months ago. Viewed 58k times. Improve this question. Add a comment. Active Oldest Votes. Improve this answer. So what do you do if the MQ server is down? It's no more resilient than a web service, is it? RobHolmes: typically, you can still enqueue it into your local queue - it will be transmitted to the queue server when it's back up - and yes , it IS more resilient than a typical web service How does it get synchronized to queue on MQ Server?

MQ stands for messaging queue. You can do all this manually with sockets, but it's very difficult. Uri Uri MQ systems normally allow users to watch the queue contents, write plugins, clear queus, etc.