Work with eviction policy properties files

Use properties files to create, modify, or delete eviction policy properties and custom properties.

Determine the changes to make to your eviction policy 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.

Use a properties file to create, modify, or delete an eviction policy instance. We can also create, modify, or delete eviction policy custom properties.

Run administrative commands using wsadmin to create or change a properties file for an eviction policy, validate the properties, and apply them to the configuration.

Action	Procedure
create	Set required properties and then run the applyConfigProperties command.
modify	Edit properties and then run the applyConfigProperties command to modify the value of a custom property.
delete	Run the deleteConfigProperties command to delete a property. If the deleted property has a default value, the property is set to the default value. To delete the entire eviction policy, uncomment #DELETE=true and then run the deleteConfigProperties command.
create Property	Not applicable
delete Property	Not applicable

Optionally, we can use interactive mode with the commands:

AdminTask.command_name('-interactive')

Tasks

• Create or edit an eviction policy properties file.

  1. Set eviction policy properties as needed.

     Open an editor on a MemoryCacheEvictionPolicy or DiskCacheEvictionPolicy properties file. Modify the Environment Variables section to match the system and set any property value that needs to be changed. To specify a custom property, edit the AttributeInfo value and properties values. An example eviction policy properties file follows:

     #
     #  MemoryCacheEvictionPolicy
     #
     ResourceType=MemoryCacheEvictionPolicy
     ImplementingResourceType=ServletCacheInstance
     ResourceId=Cell=!{cellName}:CacheProvider=myCacheProvider:ServletCacheInstance=jndiName#myServletCacheJndiName:MemoryCacheEvictionPolicy=
     AttributeInfo=memoryCacheEvictionPolicy
     #DELETE=true
     #
     
     #
     #Properties
     #
     lowThreshold=80 #integer,default(80)
     highThreshold=95 #integer,default(95)
     
     
     #
     # DiskCacheEvictionPolicy
     #
     ResourceType=DiskCacheEvictionPolicy
     ImplementingResourceType=ServletCacheInstance
     ResourceId=Cell=!{cellName}:CacheProvider=myCacheProvider:ServletCacheInstance=jndiName#myServletCacheJndiName:DiskCacheEvictionPolicy=
     AttributeInfo=diskCacheEvictionPolicy
     #DELETE=true
     #
     
     #
     #Properties
     #
     algorithm=NONE #ENUM(RANDOM|SIZE|NONE),default(NONE)
     lowThreshold=90 #integer,default(90)
     highThreshold=95 #integer,default(95)
     
     #
     EnvironmentVariablesSection
     #
     #
     #Environment Variables
     cellName=myCell04
     

  2. Run the applyConfigProperties command to create or change an eviction policy 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'])
     

• If we no longer need the eviction policy or an existing custom property, we can delete the entire eviction policy object or the custom property.

  • 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]') 
    

  • To delete a custom property, specify only the property to be deleted in the properties file and then run the deleteConfigProperties command.

Use the properties file to configure and manage an eviction policy object and its properties.

What to do next

Save the changes to the configuration.

Extracting properties files

Create server, cluster, application, or authorization group objects using properties files and wsadmin scripting

Deleting server, cluster, application, or authorization group objects using properties files

PropertiesBasedConfiguration .