com.iplanet.dpro.session.service

Class SessionConstraint

java.lang.Object

com.iplanet.dpro.session.service.SessionConstraint

public class SessionConstraint
extends Object

SessionConstraint represents the session quota for a given user and performs the necessary actions based on the session quota limit, If the user reaches maximum allowed session limit , the activation request of new session should be rejected.

If this is the "session upgarde" case, the session quota checking is bypassed when activating the new session. This is due to the fact that during the session upgrade process the old session will not be destroyed until this new session is successfully activated.

The session count however still has to be incremented because there is indeed a new valid session being created. As a result, there is a very small window where both old session and the new session are both valid and if there is another client trying to create a new session for the same user in the meantime, it might not be allowed to do so due to session quota being exceeded. This conservative approach is considered as acceptable here.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DESTROY_OLDEST_SESSION_CLASS

Constructor Summary

Constructors

Constructor and Description
SessionConstraint()

Method Summary

Modifier and Type	Method and Description
protected boolean	checkQuotaAndPerformAction(InternalSession internalSession) Check if the session quota for a given user has been exhausted and perform necessary actions in such as case.
static int	getDefaultSessionQuota()

Methods inherited from class java.lang.Object

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

Field Detail

DESTROY_OLDEST_SESSION_CLASS

public static final String DESTROY_OLDEST_SESSION_CLASS

See Also:

Constant Field Values

Constructor Detail

SessionConstraint

public SessionConstraint()

Method Detail

checkQuotaAndPerformAction

protected boolean checkQuotaAndPerformAction(InternalSession internalSession)

Check if the session quota for a given user has been exhausted and perform necessary actions in such as case.

Parameters:

internalSession -

Returns:

true if the session activation request should be rejected, false otherwise.

getDefaultSessionQuota

public static int getDefaultSessionQuota()