Set a shared library for an application using scripting


This task uses the AdminConfig object to configure a shared library for an application. Shared libraries are files used by multiple applications. Create a shared library to reduce the number of duplicate library files on your system.

There are two ways to complete this task. The example in this topic uses the AdminConfig object to create and configure a shared library. Alternatively, we can use the createSharedLibrary script in the AdminResources script library to configure shared libraries.

The scripting library provides a set of procedures to automate the most common administration functions. We can run each script procedure individually, or combine several procedures to quickly develop new scripts.

 

  1. Launch the wsadmin scripting tool using the Jython scripting language.

  2. Identify the shared library and assign it to the library variable. We can either use an existing shared library or create a new one...

    • To create a new shared library...

      1. Idenitfy the node and assign it to a variable...

        • Jacl...

          set n1 [$AdminConfig getid /Cell:mycell/Node:mynode/]

        • Jython...

          n1 = AdminConfig.getid('/Cell:mycell/Node:mynode/') print n1


        Table 1. getid command elements

        set Jacl command
        n1 variable name
        $ Jacl operator for substituting a variable name with its value
        AdminConfig object representing the WAS configuration
        getid AdminConfig command
        Cell is the object type
        mycell is the name of the object that will be modified
        Node is the object type
        mynode is the name of the object that will be modified

        For example...

        mynode(cells/mycell/nodes/mynode|node.xml#Node_1)

      2. Create the shared library in the node.

        The following example creates a new shared library in the node scope. We can modify it to use the cell or server scope.

        • Jacl...

          set library [$AdminConfig create Library $n1 {{name mySharedLibrary} {classPath c:/mySharedLibraryClasspath}}]

        • Jython...

          library = AdminConfig.create('Library', n1, [['name', 'mySharedLibrary'], ['classPath', 'c:/mySharedLibraryClasspath']]) print library


        Table 2. create Library command elements

        set Jacl command
        library variable name
        $ Jacl operator for substituting a variable name with its value
        AdminConfig object representing the WAS configuration
        create AdminConfig command
        Library AdminConfig object
        n1 evaluates to the ID of host node specified in step number 1
        name attribute
        mySharedLibrary is the value of the name attribute
        classPath attribute
        /mySharedLibraryClasspath is the value of the classPath attribute

        For example...

        MySharedLibrary(cells/mycell/nodes/mynode|libraries.xml#Library_1)

    • To use an existing shared library, issue the following command:

      • Jacl...

        set library [$AdminConfig getid /Library:mySharedLibrary/]

      • Jython...

        library = AdminConfig.getid('/Library:mySharedLibrary/') print library


      Table 3. getid Library command elements

      set Jacl command
      library variable name
      $ Jacl operator for substituting a variable name with its value
      AdminConfig object representing the WAS configuration
      getid AdminConfig command
      Library attribute
      mySharedLibrary is the value of the Library attribute

      For example...

      MySharedLibrary(cells/mycell/nodes/mynode|libraries.xml#Library_1)

  3. Identify the deployment configuration object for the application and assign it to the deployment variable. For example:

    • Jacl...

      set deployment [$AdminConfig getid /Deployment:myApp/]

    • Jython...

      deployment = AdminConfig.getid('/Deployment:myApp/') print deployment


    Table 4. getid Deployment command elements

    set Jacl command
    deployment variable name
    $ Jacl operator for substituting a variable name with its value
    AdminConfig object representing the WAS configuration
    getid AdminConfig command
    Deployment attribute
    myApp is the value of the Deployment attribute
    print Jython command

    For example...

    myApp(cells/mycell/applications/myApp.ear/deployments/myApp|deployment.xml#Deployment_1)

  4. Retrieve the application deployment and assign it to the appDeploy variable. For example:

    • Jacl...

      set appDeploy [$AdminConfig showAttribute $deployment deployedObject]

    • Jython...

      appDeploy = AdminConfig.showAttribute(deployment, 'deployedObject') print appDeploy


    Table 5. showAttribute deployment command elements

    set Jacl command
    appDeploy variable name
    $ Jacl operator for substituting a variable name with its value
    AdminConfig object representing the WAS configuration
    showAttribute AdminConfig command
    deployment evaluates the ID of the deployment configuration object specified in step number 2
    deployedObject attribute of modify objects
    print Jython command

    For example...

    (cells/mycell/applications/myApp.ear/deployments/ myApp|deployment.xml#ApplicationDeployment_1)

  5. Identify the class loader in the application deployment and assign it to the classLoader variable. For example:

    • Jacl...

      set classLoad1 [$AdminConfig showAttribute $appDeploy classloader]

    • Jython...

      classLoad1 = AdminConfig.showAttribute(appDeploy, 'classloader') print classLoad1


    Table 6. showAttribute appDeploy command elements

    set Jacl command
    classLoad1 variable name
    $ Jacl operator for substituting a variable name with its value
    AdminConfig object representing the WAS configuration
    showAttribute AdminConfig command
    appDeploy evaluates the ID of the application deployment specified in step number 3
    classLoader attribute of modify objects
    print Jython command

    For example...

    (cells/mycell/applications/myApp.ear/deployments/myApp|deployment.xml#Classloader_1)

  6. Associate the shared library in the application through the class loader. For example:

    • Jacl...

      $AdminConfig create LibraryRef $classLoad1 {{libraryName MyshareLibrary}}

    • Jython...

      print AdminConfig.create('LibraryRef', classLoad1, [['libraryName', 'MyshareLibrary']])


    Table 7. create LibraryRef command elements

    $ Jacl operator for substituting a variable name with its value
    AdminConfig object representing the WAS configuration
    create AdminConfig command
    LibraryRef AdminConfig object
    classLoad1 evaluates to the ID of class loader specified in step number 4
    libraryName attribute
    MyshareLibrary is the value of the libraryName attribute

    For example...

    (cells/mycell/applications/myApp.ear/deployments/myApp|deployment.xml#LibraryRef_1)

  7. Save the configuration changes...

    AdminConfig.save()

  8. Synchronize the node.

    Use the syncActiveNode or syncNode scripts in the AdminNodeManagement script library to propagate the configuration changes to node or nodes.

    • Use the syncActiveNodes script to propagate the changes to each node in the cell...

      AdminNodeManagement.syncActiveNodes()

    • Use the syncNode script to propagate the changes to a specific node, as the following example demonstrates:

      AdminNodeManagement.syncNode("myNode")

 

Related tasks


Create shared libraries
Associating shared libraries with applications or modules
Use the AdminConfig object for scripted administration
Set a shared library using scripting

 

Related


Resource configuration scripts
Commands for the AdminConfig object