com.iplanet.dpro.session.service.cluster

Class SingleServerClusterMonitor

java.lang.Object

com.iplanet.dpro.session.service.cluster.SingleServerClusterMonitor

All Implemented Interfaces:

ClusterMonitor

public class SingleServerClusterMonitor
extends Object
implements ClusterMonitor

No-op implementation of ClusterMonitor to be used when session fail-over is not enabled.

Since:

13.0.0

Constructor Summary

Constructors

Constructor and Description
SingleServerClusterMonitor()

Method Summary

Modifier and Type	Method and Description
boolean	checkServerUp(String serverID) Indicates if the specified server is up.
String	getCurrentHostServer(SessionID sid) Identify the host (aka home or authoritative) server for the provided session.
boolean	isSiteUp(String siteId) Indicates if the specified site is up.
void	shutdown() No operation for this implementation.

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleServerClusterMonitor

public SingleServerClusterMonitor()

Method Detail

isSiteUp

public boolean isSiteUp(String siteId)

Indicates if the specified site is up.

Specified by:

isSiteUp in interface ClusterMonitor

Parameters:

siteId - A possibly null Site Id.

Returns:

True if the Site is up, False if it failed to respond to a query.

checkServerUp

public boolean checkServerUp(String serverID)

Indicates if the specified server is up.

Specified by:

checkServerUp in interface ClusterMonitor

Parameters:

serverID - server id

Returns:

true if server is up, false otherwise

getCurrentHostServer

public String getCurrentHostServer(SessionID sid)

Identify the host (aka home or authoritative) server for the provided session. If the currently assigned host server for the session is found to be down, this method uses a deterministic algorithm to select a new one from those known to the clustering servive based on the session's STORAGE_KEY. This is the key method of "internal request routing".

Specified by:

getCurrentHostServer in interface ClusterMonitor

Parameters:

sid - SessionID for which the home server is to be found

Returns:

server id for the server instance determined to be the current host

shutdown

public void shutdown()

No operation for this implementation.

Specified by:

shutdown in interface ClusterMonitor