Modifying class loader modes for applications using wsadmin scripting

You can modify class loader modes for an application with scripting and the wsadmin tool.

Before you begin

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, you 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. You can run each script procedure individually, or combine several procedures to quickly develop new scripts.

About this task

Attention: If an application is running, changing an application setting causes the application to restart. On stand-alone servers, the application restarts after you save the change. On multiple-server products, the application restarts after you save the change and files synchronize on the node where the application is installed. To control when synchronization occurs on multiple-server products, deselect Synchronize changes with nodes on the Console preferences page.

Procedure

Start the wsadmin scripting tool.
Retrieve the configuration ID of the object that you want to modify and set it to the dep variable. For example:
- Using Jacl:
```
set dep [$AdminConfig getid /Deployment:ivtApp/]
```
- Using Jython:
```
dep = AdminConfig.getid('/Deployment:ivtApp/')
```

Identify the deployed object and set it to the depObject variable. For example:

Using Jacl:

set depObject [$AdminConfig showAttribute $dep deployedObject]

Using Jython:

depObject = AdminConfig.showAttribute(dep, 'deployedObject')

Identify the class loader and set it to the classldr variable. For example:

Using Jacl:

set classldr [$AdminConfig showAttribute $depObject classloader]

Using Jython:

classldr = AdminConfig.showAttribute(depObject, 'classloader')

Show the current attribute values of the configuration object with the showall command, for example:
- Using Jacl:
```
$AdminConfig showall $classldr
```
  Example output:
```
{libraries {}} {mode PARENT_FIRST}
```
- Using Jython:
```
print AdminConfig.showall(classldr)
```
  Example output:
```
[libraries []] [mode PARENT_FIRST]
```
Modify the attributes of the configuration object with the modify command, for example:
- Using Jacl:
```
$AdminConfig modify $classldr {{mode PARENT_LAST}}
```
- Using Jython:
```
AdminConfig.modify(classldr, [['mode', 'PARENT_LAST']])
```
Save the configuration changes.
Use the following command example to save your configuration changes:
```
AdminConfig.save()
```
Verify the changes that you made to the attribute value with the showall command, for example:
- Using Jacl:
```
$AdminConfig showall $classldr
```
  Example output:
```
{libraries {}} {mode PARENT_LAST}
```
- Using Jython:
```
AdminConfig.showall(classldr)
```
  Example output:
```
[libraries []] [mode PARENT_LAST]
```