org.mobicents.tools.sip.balancer
Class PersistentConsistentHashBalancerAlgorithm

java.lang.Object
  org.mobicents.tools.sip.balancer.DefaultBalancerAlgorithm
      org.mobicents.tools.sip.balancer.PersistentConsistentHashBalancerAlgorithm

All Implemented Interfaces:

BalancerAlgorithm

public class PersistentConsistentHashBalancerAlgorithm
extends DefaultBalancerAlgorithm

Persistent Consistent Hash algorithm - see http://docs.google.com/present/view?id=dc5jp5vx_89cxdvtxcm Example algorithms section

Author:

vralev

Field Summary

protected org.jboss.cache.Cache	cache
protected java.lang.String	httpAffinityKey
protected java.lang.String	sipHeaderAffinityKey

Fields inherited from class org.mobicents.tools.sip.balancer.DefaultBalancerAlgorithm

properties

Constructor Summary

PersistentConsistentHashBalancerAlgorithm()

PersistentConsistentHashBalancerAlgorithm(java.lang.String headerName)

Method Summary

protected int	hashAffinityKeyword(java.lang.String keyword)
void	init() Lifecycle method.
void	modified(org.jboss.cache.notifications.event.Event event)
void	nodeAdded(SIPNode node) Notify the algorithm when a node is added.
void	nodeRemoved(SIPNode node) Notifying the algorithm when a node is dead.
SIPNode	processExternalRequest(javax.sip.message.Request request) When a request comes it is passed to the algorithm.
SIPNode	processHttpRequest(org.jboss.netty.handler.codec.http.HttpRequest request) Handle HttpRequests here.
void	viewChanged(org.jboss.cache.notifications.event.ViewChangedEvent event)

Methods inherited from class org.mobicents.tools.sip.balancer.DefaultBalancerAlgorithm

assignToNode, getBalancerContext, getProperties, jvmRouteSwitchover, processAssignedExternalRequest, processExternalResponse, processInternalRequest, processInternalResponse, setProperties, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

sipHeaderAffinityKey

protected java.lang.String sipHeaderAffinityKey

httpAffinityKey

protected java.lang.String httpAffinityKey

cache

protected org.jboss.cache.Cache cache

Constructor Detail

PersistentConsistentHashBalancerAlgorithm

public PersistentConsistentHashBalancerAlgorithm()

PersistentConsistentHashBalancerAlgorithm

public PersistentConsistentHashBalancerAlgorithm(java.lang.String headerName)

Method Detail

processExternalRequest

public SIPNode processExternalRequest(javax.sip.message.Request request)

Description copied from interface: BalancerAlgorithm

When a request comes it is passed to the algorithm. The algorithm must add the Route headers to the node or nodes where the request should go. The actual proxying is done at the LB. Allowing the algorithm to add headers allows more flexibility for example when you need to pass some information to the AS or the application to make further LB decisions or multiprotocol cooperative load balancing. It is very little effort for great flexibility.

Returns:

modified

public void modified(org.jboss.cache.notifications.event.Event event)

nodeAdded

public void nodeAdded(SIPNode node)

Description copied from interface: BalancerAlgorithm

Notify the algorithm when a node is added.

Specified by:

nodeAdded in interface BalancerAlgorithm

Overrides:

nodeAdded in class DefaultBalancerAlgorithm

nodeRemoved

public void nodeRemoved(SIPNode node)

Description copied from interface: BalancerAlgorithm

Notifying the algorithm when a node is dead.

Specified by:

nodeRemoved in interface BalancerAlgorithm

Overrides:

nodeRemoved in class DefaultBalancerAlgorithm

processHttpRequest

public SIPNode processHttpRequest(org.jboss.netty.handler.codec.http.HttpRequest request)

Description copied from interface: BalancerAlgorithm

Handle HttpRequests here. Use the Netty API for Http request analysis.

Specified by:

processHttpRequest in interface BalancerAlgorithm

Overrides:

processHttpRequest in class DefaultBalancerAlgorithm

Returns:

hashAffinityKeyword

protected int hashAffinityKeyword(java.lang.String keyword)

viewChanged

public void viewChanged(org.jboss.cache.notifications.event.ViewChangedEvent event)

init

public void init()

Description copied from interface: BalancerAlgorithm

Lifecycle method. Notifies the algorithm when it's initialized with properties and balancer context.