Connecting to IBM WebSphere MQ

The ESB JMS transport can be configured with IBM® WebSphere® MQ. The following topics cover the configuration steps.

Info

The configuration steps below are for a Windows environment.

Prerequisites

Creating queue manager, queue and channel in IBM WebSphere MQ

  1. Start IBM WebSphere MQ Explorer as an administrator. If you are not running on an administrator account, right-click the IBM WebSphere MQ icon/menu item and then click Run as Administrator.
  2. Right-click on Queue Managers, move the cursor to New, and then click Queue Manager to open the Create Queue Manager wizard. Enter ESBQManager as the queue manager name. Make sure you select make this the default queue manager check box. Leave the default values unchanged in the other fields. Click Next to move to the next page.
  3. Click Next in the page for entering data and log values without changing any default values.

  4. In the page for entering configuration options, select the following. Then click Next.

    Field Name Value
    Start queue manager after it has been created check box If this is selected, the queue manager will start running immediately after it is created.
    Automatic field If this is selected, the queue manager is automatically started when the machine starts up.

  5. Configure the following in the page for entering listener options.

    Field Name Value
    Create listener configured for TCP/IP check box Select this check box to create the listener.
    Listen on port number field Enter the number of the port where you want to set the listener. In this example, the port number will be 1414.

  6. Click Next and then click Finish to save the configuration. The queue manager will be created as shown below.
    Created Queue Manager

  7. Expand the navigation tree of the ESBQManager queue manager in the navigation tree. Right-click Queues, move the cursor to New, and then click Local Queue to open the Create a Local Queue wizard. Enter the local queue name as LocalQueue1 and complete running the wizard. Leave the default values of all other fields unchanged, and click Finish to save the local queue.
  8. Right-click Channels , move the cursor to New , and then click Server-connection Channel to open the Create a Server-connection Channel wizard. Enter myChannel as the channel name and click Next. Make sure that the value for the Transmission Protocol is TCP . Leave the default values unchanged for the rest of the fields, and click Finish to save the channel.

Generating the .bindings file

  1. Create a directory in which the .bindings file can be saved in any location of your computer. In this example, a directory named jndidirectory will be created in the G folder.
  2. Go to IBM WebSphere MQ, and right-click on JMS Administered Objects , and then click Add Initial Context .
    JMS Administered Objects
  3. Select the File system option in the Connection Details wizard. Enter file:G/jndidirectory in the Context nickname field. Leave the default values unchanged for other fields and complete running the wizard. The new file initial context will be displayed in the left navigator under JMS Administered Objects as shown below.
    New File Initial Context
  4. Click the file initial context (named file:G/jndidirectory in this example) in the navigator to expand it. Right-click on Connection Factories, move the cursor to New, and then click Connection Factory. Enter the name of the connection factory as MyQueueConnectionFactory. Select Queue Connection Factory as the connection factory type. Select MQClient as the transport. Leave the default values unchanged for other fields and complete running the wizard.
  5. Right-click on the newly connected connection factory in the left navigator, and the click Properties . Click Connection . Then browse and select ESBQManager for the Base queue manager field. You can change the host and port name for the connection factory if required. No changes will be made in this example since default values are used. Leave the default values unchanged for other fields and click OK .
  6. Right-click Destination under JMS Administered Objects in the left navigator. Move the cursor to New and then click Destination to open the New Destination wizard. In order to map the destination to the local queue you created in step 7 of the Creating queue manager, queue and channel in IBM WebSphere MQ section, enter the same queue name ( LocalQueue1 in this example) in the Name field. Select Queue for the Type field. Select ESBQManager as the queue manager and LocalQueue1 as the queue in the wizard. Leave the default values unchanged for other fields and complete running the wizard.

The .bindings file will be created in the location you specified ( file:G/jndidirectory in this example) after you carry out the above steps.

In order to connect to the queue, you need to configure channel authentication. Run the following two commands to disable channel authentication for the ease of use. Alternatively, you can configure the authentication for the MQ server.

Info

Note that you have to run the command prompt as a admin user and run these commands.

runmqsc ESBQManager
ALTER QMGR CHLAUTH(DISABLED)
REFRESH SECURITY TYPE(CONNAUTH)

The following will be displayed in the command prompt.

Command Prompt

Configuring the Micro Integrator

Info

  • If you use the default configuration of the IBM MQ queue manager, you need to provide username and password client authentication. The username and password that you need to provide here is the username and password that you provide to log on to your operating system.
  • If you need to enable MQCSP authentication mode to connect to IBM MQ (without using admin user name and password), start the server (runtime) with the following system property: bash -Dcom.ibm.mq.cfg.jmqi.useMQCSPauthentication=Y
  • The vender.class.loader.enabled parameter in the above configuration should be added only when you use IBM Websphere MQ as the JMS broker.
  • ESB uses some external class loader mechanisms for some external products such as QPID and AMQP due to the limitation of serializing the JMSObject message. However, it is not required to use this mechanism for IBM Websphere MQ. By adding the vender.class.loader.enabled parameter, you can skip the external class loader for IBM Websphere MQ.
  • This property can also be included in a proxy service, REST API, message store, JMS receiver or the Synapse configuration depending on the use case.

  • If you are using Windows Operating Systems (e.g., Windows 10) , mention the .bindings file location starting with file:/// format, in the deployment.toml file.

    parameter.provider_url = "file:///G:/jndidirectory"

  1. Add the following configurations to enable the two JMS listeners.

    [[transport.jms.listener]]
name = "myQueueConnectionFactory1"
parameter.initial_naming_factory = "com.sun.jndi.fscontext.RefFSContextFactory"
parameter.provider_url = "file:/G:/jndidirectory"
parameter.connection_factory_name = "MyQueueConnectionFactory"
parameter.connection_factory_type = "queue"
parameter.username = "username"
parameter.password = "password"

[[transport.jms.listener]]
name = "default"
parameter.initial_naming_factory = "com.sun.jndi.fscontext.RefFSContextFactory"
parameter.provider_url = "file:/G:/jndidirectory"
parameter.connection_factory_name = "MyQueueConnectionFactory"
parameter.connection_factory_type = "queue"
parameter.username = "username"
parameter.password = "password"

  2. Add the following configurations to enable the two JMS senders.

    [[transport.jms.sender]]
name = "myQueueConnectionFactory1"
parameter.initial_naming_factory = "com.sun.jndi.fscontext.RefFSContextFactory"
parameter.provider_url = "file:/G:/jndidirectory"
parameter.connection_factory_name = "MyQueueConnectionFactory"
parameter.connection_factory_type = "queue"
parameter.username = "username"
parameter.password = "password"

[[transport.jms.sender]]
name = "default"
parameter.initial_naming_factory = "com.sun.jndi.fscontext.RefFSContextFactory"
parameter.provider_url = "file:/G:/jndidirectory"
parameter.connection_factory_name = "MyQueueConnectionFactory"
parameter.connection_factory_type = "queue"
parameter.username = "username"
parameter.password = "password"

Copying IBM WebSphere MQ libraries

Follow the instructions below to build and install IBM WebSphere MQ client JAR files to ESB Micro Integrator.

Info

These instructions are tested on IBM WebSphere MQ version 8.0.0.4. However, you can follow them for other versions appropriately.

  1. Create a new directory named wmq-client , and then create another new directory named lib inside it.

  2. Copy the following JAR files from the <IBM_MQ_HOME>/java/lib/ directory (where <IBM_MQ_HOME> refers to the IBM WebSphere MQ installation directory) to the wmq-client/lib/ directory.

    Info

    If you are using IBM MQ docker container, you can find these libraries in inside the /opt/mqm/java/lib directory. You can use docker cp command to copy jar files from the docker container.

    Note

    If you are using IBM MQ 8 with Mutual SSL enabled, you need to download the wmq-client-8.0.0.zip file and follow the instructions in the readme.txt file.

    • com.ibm.mq.allclient.jar
    • fscontext.jar
    • jms.jar
    • providerutil.jar

  3. Create a POM.xml file inside the wmq -client/ directory and add all the required dependencies as shown in the example below.

    Tip

    You need to change the values of the <version> and <systemPath> properties accordingly.

    <?xml version="1.0"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>wmq-client</groupId>
<artifactId>wmq-client</artifactId>
<version>8.0.0.4</version>
<packaging>bundle</packaging>
<dependencies>
    <dependency>
        <groupId>com.ibm</groupId>
        <artifactId>fscontext</artifactId>
        <version>8.0.0.4</version>
        <scope>system</scope>
        <systemPath>${basedir}/lib/fscontext.jar</systemPath>
    </dependency>
    <dependency>
        <groupId>com.ibm</groupId>
        <artifactId>providerutil</artifactId>
        <version>8.0.0.4</version>
        <scope>system</scope>
        <systemPath>${basedir}/lib/providerutil.jar</systemPath>
    </dependency>
    <dependency>
        <groupId>com.ibm</groupId>
        <artifactId>allclient</artifactId>
        <version>8.0.0.4</version>
        <scope>system</scope>
        <systemPath>${basedir}/lib/com.ibm.mq.allclient.jar</systemPath>
    </dependency>
    <dependency>
        <groupId>javax.jms</groupId>
        <artifactId>jms</artifactId>
        <version>1.1</version>
        <scope>system</scope>
        <systemPath>${basedir}/lib/jms.jar</systemPath>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <version>2.3.4</version>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
                    <Bundle-Name>${project.artifactId}</Bundle-Name>
                    <Export-Package>*;-split-package:=merge-first</Export-Package>
                    <Private-Package/>
                    <Import-Package/>
                    <Embed-Dependency>*;scope=system;inline=true</Embed-Dependency>
                    <DynamicImport-Package>*</DynamicImport-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>
</project>

  4. Navigate to the wmq -client directory using your Command Line Interface (CLI), and execute the following command, to build the project: mvn clean install

  5. Stop the ESB Micro Integrator, if it is already running.
  6. Remove any existing IBM MQ client JAR files from the MI_HOME/dropins directory and the MI_HOME/lib directory.
  7. Copy the <wmq-client>/target/wmq-client-8.0.0.4.jar file to the MI_HOME/dropins directory.
  8. Download the jta.jar file from the maven repository, and copy it to the MI_HOME/lib directory.

  9. Regenerate the .bindings file with the Provider Version : 8 property (if you already generated one before), and replace the existing .bindings file (if you have one) with the new .bindings file you generated.

  10. Start the ESB Micro Integrator server.

Deploying JMS listener proxy service

In this section, the following simple proxy service is deployed to listen to the LocalQueue1 queue. When a message is published in this queue, the proxy service would pull the message out of the queue and log it.

<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="MyJMSProxy"
       transports="jms"
       startOnLoad="true"
       trace="disable">
   <description/>
   <target>
      <inSequence>
         <log level="full"/>
         <drop/>
      </inSequence>
   </target>
   <parameter name="transport.jms.Destination">LocalQueue1</parameter>
</proxy>

Testing the proxy service

Open IBM WebSphere MQ and publish a message to LocalQueue1.

Publish Message to Queue

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