jgroup.relacs.gm
Class NewDispatcherLayer

java.lang.Object
  jgroup.relacs.gm.NewDispatcherLayer

All Implemented Interfaces:

java.rmi.Remote, Layer, DispatcherService, PingListener, RemoteDispatcher

public class NewDispatcherLayer
extends java.lang.Object
implements DispatcherService, RemoteDispatcher, PingListener

Handle dispatching daemon events to other layers in the stack, e.g., the MembershipLayer and MulticastLayer.

Since:

Jgroup 0.1 (rewritten for Jgroup 3.0)

Author:

Hein Meling

Nested Class Summary

Nested classes/interfaces inherited from interface jgroup.core.Layer

Layer.FinalizeLayer

Method Summary

void	addEvent(Event event) Receives and stores a message from daemon
void	addListener(java.lang.Object listener) Add a listener to this layer.
void	dispatch(java.lang.Object obj) Dispatch a single event (can be called by an upcall method)
static NewDispatcherLayer	getLayer()
RemoteDispatcher	getRemoteDispatcher() Returns the remote dispatcher reference.
void	halt() Stop dispatching events
void	ping() This method is invoked periodically by the daemon to verify whether a remote member object is still active or has crashed.
void	start(int gid) Start dispatching events for the given group.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getLayer

public static NewDispatcherLayer getLayer()

addListener

public void addListener(java.lang.Object listener)

Description copied from interface: Layer

Add a listener to this layer. Many layers require to be notified of events produced by other layers in order to provide its own functionallity, and this method must be invoked to notify this layer of an interested listener. A listener may be another layer or an application server replica.

Specified by:

addListener in interface Layer

Parameters:

listener - An Object representation of the listener interface. This will typically be cast to the appropriate listener interface type after checking the type with the instanceof operator.

start

public void start(int gid)

Description copied from interface: DispatcherService

Start dispatching events for the given group.

Specified by:

start in interface DispatcherService

halt

public void halt()

Description copied from interface: DispatcherService

Stop dispatching events

Specified by:

halt in interface DispatcherService

dispatch

public void dispatch(java.lang.Object obj)

Description copied from interface: DispatcherService

Dispatch a single event (can be called by an upcall method)

Specified by:

dispatch in interface DispatcherService

getRemoteDispatcher

public RemoteDispatcher getRemoteDispatcher()
                                     throws JgroupException

Description copied from interface: DispatcherService

Returns the remote dispatcher reference.

Specified by:

getRemoteDispatcher in interface DispatcherService

Throws:

JgroupException - Raised if the dispatcher service could be not export for remote access by the Jgroup daemon.

addEvent

public void addEvent(Event event)
              throws java.rmi.RemoteException

Description copied from interface: RemoteDispatcher

Receives and stores a message from daemon

Specified by:

addEvent in interface RemoteDispatcher

Throws:

java.rmi.RemoteException

ping

public void ping()
          throws java.rmi.RemoteException

Description copied from interface: PingListener

This method is invoked periodically by the daemon to verify whether a remote member object is still active or has crashed. If a remote exception is thrown, this means that the member has crashed.

Specified by:

ping in interface PingListener

Throws:

java.rmi.RemoteException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object