Working with class loader properties files

You can use properties files to create or change PARENT_LAST class loader properties under the ApplicationServer object of a server.

Before you begin

Determine the changes that you want to make to your class loader configuration or its configuration objects.

Start the wsadmin scripting tool. To start wsadmin using the Jython language, run the wsadmin -lang jython command from the bin directory of the server profile.

About this task

Using a properties file, you can create, modify, or delete a class loader object and its configuration properties.

Run administrative commands using wsadmin to create or change a properties file for a class loader, validate the properties, and apply them to your configuration.

Table 1. Actions for PARENT_LAST class loader properties files . You can create, modify, and delete class loader configuration properties.
Action	Procedure
create	Set properties and then run the applyConfigProperties command.
modify	Edit properties and then run the applyConfigProperties command.
delete	Uncomment `#DELETE=true` and run the deleteConfigProperties command.

Optionally, you can use interactive mode with the commands:

AdminTask.command_name('-interactive')

Procedure

Create a class loader and its properties.
1. Create a properties file for a Classloader object.
  Open an editor and create a class loader properties file. You can copy an example properties file in this step into an editor and modify the properties as needed for your situation.
  
  The following example defines a class loader with mode PARENT_LAST under an ApplicationServer object of a server:
```
#
# SubSection 1.0.0 # ApplicationServer Classloader
#
ResourceType=Classloader
ImplementingResourceType=GenericType
ResourceId=Cell=!{cellName}:Node=!{nodeName}:Server=!{serverName}:ApplicationServer=:Classloader=mode#PARENT_LAST
AttributeInfo=classloaders
#DELETE=true

#
#Properties
#
mode=PARENT_LAST #ENUM(PARENT_FIRST|PARENT_LAST),default(PARENT_FIRST)
```
2. Run the applyConfigProperties command to create a class loader configuration.
  Running the applyConfigProperties command applies the properties file to the configuration. In this Jython example, the optional -reportFileName parameter produces a report named report.txt:
```
AdminTask.applyConfigProperties(['-propertiesFileName myObjectType.props -reportFileName report.txt'])
```
Modify an existing class loader.
1. Obtain a properties file for the class loader that you want to change.
  You can extract a properties file for a Classloader object using the extractConfigProperties command.
2. Open the properties file in an editor and change the properties as needed.
3. Run the applyConfigProperties command.
If you no longer need a class loader, you can delete the entire class loader object.
To delete the entire object, specify DELETE=true in the header section of the properties file and run the deleteConfigProperties command; for example:
```
AdminTask.deleteConfigProperties('[-propertiesFileName myObjectType.props -reportFileName report.txt]') 
```

Results

You can use the properties file to configure and manage the class loader object.

What to do next

Save the changes to your configuration.