The file Persistence Type

This persistence type provides session persistence to the local file system, and allows a single server domain to recover the session state after a failure and restart. The session state is persisted in the background, and the rate at which this occurs is configurable. The store also provides passivation and activation of the session state to help control the amount of memory used. This option is not supported in a production environment. However, it is useful for a development system with a single server instance.

Make sure the delete option is set in the server.policy file, or expired file-based sessions might not be deleted properly. For more information about server.policy, see The server.policy File.

To specify the file persistence type for the entire web container, use the configure-ha-persistence command. For details, see the Sun Java System Application Server Platform Edition 8.2 Reference Manual.

To specify the file persistence type for a specific web application, edit the sun-web.xml file as in the following example. Note that persistence-type must be set to file. This overrides the web container availability settings for the web application.

<sun-web-app>
...
<session-config>
	<session-manager persistence-type=file>
		<store-properties>
			<property name=directory value=sessiondir />
		</store-properties>
	</session-manager>
	...
</session-config>
...
</sun-web-app>

The file persistence type supports all the manager properties listed under manager-properties except sessionFilename, and supports the directory store property listed under store-properties.

For more information about the sun-web.xml file, see The sun-web.xml File.