WAS v8.5 > Script the application serving environment (wsadmin) > Use properties files to manage system configuration > Manage specific configuration objects using properties files > Work with cache provider properties files

Work with eviction policy properties files

We can 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. Using a properties file, we can 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 your configuration.

Actions for eviction policy properties files. We can create, modify, and delete eviction policy properties.

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')

• 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 you 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.

Results

We can use the properties file to manage an eviction policy object and its properties.

Save the changes to your configuration.

Related

Extracting properties files using wsadmin.sh
Create server, cluster, application, or authorization group objects using properties files and wsadmin scripting
Delete server, cluster, application, or authorization group objects using properties files

Reference:

PropertiesBasedConfiguration command group for AdminTask using wsadmin.sh

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