org.mmbase.clustering
Class ClusterManager

java.lang.Object
  org.mmbase.clustering.ClusterManager

All Implemented Interfaces:

AllEventListener, EventListener, Runnable

Direct Known Subclasses:

Multicast, Multicast, Unicast

public abstract class ClusterManager

extends Object

implements AllEventListener, Runnable

ClusterManager is a thread object that reads the receive queue and calls the objects (listeners) who need to know. The ClusterManager starts communication threads to handle the sending and receiving of messages.

Version:

$Id: ClusterManager.java,v 1.31 2006/07/06 11:26:39 michiel Exp $

Author:

Nico Klasens, Michiel Meeuwissen, Ernst Bunders

Field Summary

protected boolean	compatible17
protected int	follownr Followup number of message
protected Thread	kicker Thread which processes the messages
protected Queue	nodesToSend Queue with messages to send to other MMBase instances
protected Queue	nodesToSpawn Queue with received messages from other MMBase instances
protected Statistics	receive
protected Statistics	send
protected boolean	spawnThreads

Constructor Summary

ClusterManager()

Method Summary

protected byte[]	createMessage(Event event)
protected String	createMessage(String machine, int nodenr, String tableName, String type) Creates MMBase 1.7 parseable message.
protected void	handleEvent(Event event)
void	notify(Event event)
protected Event	parseMessage(byte[] message)
protected NodeEvent	parseMessageBackwardCompatible(String message)
protected void	readConfiguration(Map configuration)
void	run()
void	shutdown()
protected void	start() Starts the Changer Thread.
protected abstract void	startCommunicationThreads() Subclasses should start the communication threads in this method
protected abstract void	stopCommunicationThreads() Subclasses should stop the communication threads in this method

Methods inherited from class java.lang.Object

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

Field Detail

receive

protected final Statistics receive

send

protected final Statistics send

nodesToSend

protected Queue nodesToSend

Queue with messages to send to other MMBase instances

nodesToSpawn

protected Queue nodesToSpawn

Queue with received messages from other MMBase instances

kicker

protected Thread kicker

Thread which processes the messages

spawnThreads

protected boolean spawnThreads

compatible17

protected boolean compatible17

follownr

protected int follownr

Followup number of message

Constructor Detail

ClusterManager

public ClusterManager()

Method Detail

shutdown

public final void shutdown()

readConfiguration

protected void readConfiguration(Map configuration)

startCommunicationThreads

protected abstract void startCommunicationThreads()

Subclasses should start the communication threads in this method

stopCommunicationThreads

protected abstract void stopCommunicationThreads()

Subclasses should stop the communication threads in this method

notify

public void notify(Event event)

Specified by:

notify in interface AllEventListener

start

protected void start()

Starts the Changer Thread.

createMessage

protected byte[] createMessage(Event event)

createMessage

protected String createMessage(String machine,
                               int nodenr,
                               String tableName,
                               String type)

Creates MMBase 1.7 parseable message. This is simple String, which is prefixed before the actual 1.8 message.

Parameters:

machine - MMBase 'machine name'.

nodenr - node number

tableName - node type (tablename)

type - command type

Returns:

message

parseMessage

protected Event parseMessage(byte[] message)

parseMessageBackwardCompatible

protected NodeEvent parseMessageBackwardCompatible(String message)

run

public void run()

Specified by:

run in interface Runnable

See Also:

Runnable.run()

handleEvent

protected void handleEvent(Event event)

Parameters:

event -