Automating data access resource configuration using wsadmin scripting

The scripting library provides Jython script procedures to assist in automating your environment. Use the resource management scripts to configure and manage your Java™ Database Connectivity (JDBC) configurations.

About this task

A biblioteca de scripts fornece um conjunto de procedimentos para automatizar as funções mais comuns de administração de servidor de aplicativos. Há três maneiras de utilizar a biblioteca de script Jython.
  • Execute scripts da biblioteca de scripts Jython no modo interativo com a ferramenta wsadmin. Você pode ativar a ferramenta wsadmin e executar scripts individuais incluídos na biblioteca de scripts utilizando a seguinte sintaxe:
    wsadmin>AdminServerManagement.createApplicationServer("myNode", "myServer", "default")
  • Utilize um editor de texto para combinar diversos scripts da biblioteca de scripts Jython, conforme exibido na seguinte amostra:
    #
    # My Custom Jython Script - file.py
    #
    AdminServerManagement.createApplicationServer("myNode", "Server1", "default")
    AdminServerManagement.createApplicationServer("myNode", "Server2", "default")
    
    # Use one of them as the first member of a cluster
    AdminClusterManagement.createClusterWithFirstMember("myCluster", "APPLICATION_SERVER",
        "myNode", "Server1")
    
    # Add a second member to the cluster
    AdminClusterManagement.createClusterMember("myCluster", "myNode", "Server3")
    
    # Install an application
    AdminApplication.installAppWithClusterOption("DefaultApplication",
        "..\installableApps\DefaultApplication.ear", "myCluster") 
    
    # Start all servers and applications on the node
    AdminServerManagement.startAllServers("myNode")
    Salve o script customizado e execute-o na linha de comandos, conforme demonstra a seguinte sintaxe:
    bin>wsadmin -language jython -f path/to/your/jython/file.py
  • Utilize o código da biblioteca de scripts Jython como sintaxe de amostra para gravar scripts customizados. Cada exemplo de script na biblioteca de scripts demonstra boas práticas para escrever scripts wsadmin. O código da biblioteca de script está localizado no diretório app_server_root/scriptLibraries. Nesse diretório, os scripts são organizados em subdiretórios, de acordo com a funcionalidade. Por exemplo, o subdiretório app_server_root/scriptLibraries/application/V70 contém procedimentos que executam tarefas de gerenciamento de aplicativo que são aplicáveis à Versão 7.0 e posterior do produto. O subdiretório V70 nos caminhos da biblioteca de scripts não significa que os scripts contidos nesse diretório são scripts da Versão 7.0.
The data access resource management procedures in the scripting library are located in the app_server_root/scriptLibraries/resources/JDBC/V70 subdirectory. Each script from the directory automatically loads when you launch the wsadmin tool. To automatically load your own Jython scripts (*.py) when the wsadmin tool starts, save your automation scripts to a new subdirectory in the app_server_root/scriptLibraries directory.
Boas Práticas Boas Práticas: To create custom scripts using the scripting library procedures, save the modified scripts to a new subdirectory to avoid overwriting the library. Do not edit the script procedures in the scripting library.bprac

You can use the scripts to perform many combinations of administration functions. Use the following sample combination of procedures to configure a JDBC provider and data source.

Procedure

  1. Verify that all of the necessary JDBC driver files are installed on your node manager. If you opt to configure a user-defined JDBC provider, check your database documentation for information about the driver files.
  2. Optional: Launch the wsadmin tool.
    Use this step to launch the wsadmin tool and connect to a server, or run the tool in local mode. If you launch the wsadmin tool, use the interactive mode examples in this topic to run scripts.
    • Enter the following command from the bin directory to launch the wsadmin tool and connect to a server:
      bin>wsadmin -lang jython
    • Enter the following command from the bin directory to launch the wsadmin tool in local mode and using the Jython scripting language:
      bin>wsadmin -conntype none -lang jython
    When the wsadmin tool launches, the system loads all scripts from the scripting library.
  3. Configure a JDBC provider.

    Run the createJDBCProvider procedure from the script library and specify the required arguments. To run the script, specify the node name, server name, name to assign to the new JDBC provider, and the implementation class name. You can optionally specify additional attributes in the following format: [["attr1", "value1"], ["attr2", "value2"]]. Custom properties for specific vendor JDBC drivers must be set on the application server data source. Consult your database documentation for information about available custom properties.

    The following example creates a JDBC provider in your configuration:
    bin>wsadmin -lang jython -c "AdminJDBC.createJDBCProvider("myNode", "myServer", "myJDBCProvider",
     "myImplementationClass", [["description", "testing"], ["xa", "false"], ["providerType", "provType"]])"
    You can also use interactive mode to run the script procedure, as the following example displays:
    wsadmin>AdminJDBC.createJDBCProvider("myNode", "myServer", "myJDBCProvider", "myImplementationClass",
     [["description", "testing"], ["xa", "false"], ["providerType", "provType"]])
    The script returns the configuration ID of the new JDBC provider.
  4. Use a template to configure a data source.

    Run the createDataSourceUsingTemplate procedure from the script library and specify the required arguments. To run the script, specify the node name, server name, JDBC provider name, configuration ID of the template to use, and the name to assign to the new data source. You can optionally specify additional attributes in the following format: [["attr1", "value1"], ["attr2", "value2"]].

    The following example uses a template to create a data source in your configuration:
    bin>wsadmin -lang jython -c "AdminJDBC.createDataSourceUsingTemplate("myNode", "myServer", "myJDBCProvider",
     "Derby JDBC Driver DataSource(templates/system|jdbc-resource-provider-templates.xml#DataSource_derby_1)",
     "myDataSource", [["authDataAlias", "myalias"], ["authMechanismPreference", "BASIC_PASSWORD"],
     ["description", "testing"], ["jndiName", "dsjndi1"], ["logMissingTransactionContext", "true"],
     ["statementCacheSize", "5"]])"
    You can also use interactive mode to run the script procedure, as the following example displays:
    wsadmin>AdminJDBC.createDataSourceUsingTemplate("myNode", "myServer", "myJDBCProvider", "Derby JDBC Driver 
     DataSource(templates/system|jdbc-resource-provider-templates.xml#DataSource_derby_1)", "myDataSource", 
     [["authDataAlias", "myalias"], ["authMechanismPreference", "BASIC_PASSWORD"], ["description", "testing"],
     ["jndiName", "dsjndi1"], ["logMissingTransactionContext", "true"], ["statementCacheSize", "5"]])
    The script returns the configuration ID of the new data source.

Results

The wsadmin script libraries return the same output as the associated wsadmin commands. For example, the AdminServerManagement.listServers() script returns a list of available servers. The AdminClusterManagement.checkIfClusterExists() script returns a value of true if the cluster exists, or false if the cluster does not exist. If the command does not return the expected output, the script libraries return a 1 value when the script successfully runs. If the script fails, the script libraries return a -1 value and an error message with the exception.

By default, the system disables failonerror option. To enable this option, specify true as the last argument for the script procedure, as the following example displays:
wsadmin>AdminApplication.startApplicationOnCluster("myApplication","myCluster","true")

What to do next

Create custom scripts to automate your environment by combining script procedures from the scripting library. Save custom scripts to a new subdirectory of the app_server_root/scriptLibraries directory.


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