blackboard.platform.session
Class BbSession.Scope

java.lang.Object
  |
  +--blackboard.platform.session.BbSession.Scope

Enclosing class:

BbSession

public static class BbSession.Scope

extends java.lang.Object

Inner class -- BbSession.Scope Enumeration.

Field Summary

static BbSession.Scope	GLOBAL_USER Attributes with global scope are offloaded to persistent storage in database or filesystem and are subsequently available to any webapp or consumer in any process.
static BbSession.Scope	LOCAL_USER Attributes with local scope are stored in memory and are available to all webapps and other consumers in the system.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOCAL_USER

public static final BbSession.Scope LOCAL_USER

Attributes with local scope are stored in memory and are available to all webapps and other consumers in the system. In a distributed environement, each blackboard instance will have its own copy of this cache. It is not intended to be distributed in any way accross VMs. Attributes are always clean, or up to date, in this scope, since sets and gets will be syncronized in the session implementation.

GLOBAL_USER

public static final BbSession.Scope GLOBAL_USER

Attributes with global scope are offloaded to persistent storage in database or filesystem and are subsequently available to any webapp or consumer in any process. Attributes may be dirty, since we are currently not supporting setting and reading these attributes in a transaction.