sunlabs.brazil.session

Class PropertiesCacheManager

public class PropertiesCacheManager extends CacheManager implements Handler, Serializable

A version of the CacheManager that saves out any session state that is either a "java properties" object, or implements "Saveable" into a directory in the filesystem, one file per entry, then restores them on server startup. This is a "poor man's" serialization, that saves only ascii state represented in properties files. This permits a wider variety of changes to be made to the server code, yet still have the ability to read in the proper session information.

Classes that are not properties files may implement "Saveable", which has the store() and load() methods from Properties; they are expected to generate and restore the state of the object in Properties format.

This handler/sessionManager can take an ascii-readable "snapshot" of the server state, for all state that is a java properties object (or implements Saveable). It doesn't perturb the existing state.

Properties:

storeDir
The directory to use to store the state files. It is created as needed when the state is saved. Defalts to "store".
match
A glob pattern that matches the url (or url?query if a query is used. Defaults to "*\?*save=true".
filePrefix
A prefix pattern to use for all session files. Defaults to the handler prefix.
defer
If set, the saved session information is not reconstructed upon startup. Only the list of sessions is read in; the session information is restored only when needed.

Version: %V% PropertiesCacheManager.java

Author: Stephen Uhler (stephen.uhler@sun.com)

Nested Class Summary
interfacePropertiesCacheManager.Saveable
This interface allows for persistence of non-properties session objects.
Method Summary
protected ObjectgetObj(Object session, Object ident)
If we have deferred session loading, check here and get it!
booleaninit(Server server, String prefix)
booleanrespond(Request request)

Method Detail

getObj

protected Object getObj(Object session, Object ident)
If we have deferred session loading, check here and get it!

init

public boolean init(Server server, String prefix)

respond

public boolean respond(Request request)