org.jgroups.protocols
Class PARTITION

java.lang.Object
  org.jgroups.stack.Protocol
      org.jgroups.protocols.PARTITION

public class PARTITION
extends Protocol

Protocol to simulate a partition. This can be done in 2 ways: send down a PARTITION event (with a boolean flag on or off, to start or end a partition), or by grabbing a reference to the protocol via the ProtocolStack and calling the methods startPartition() or stopPartition() directly. This can also be done via JMX.

A partition simply discards all messages, but let's other events pass.

Version:

$Id: PARTITION.java,v 1.4 2008/03/08 09:46:46 vlada Exp $

Author:

Bela Ban

Field Summary

protected Address	local_address
protected boolean	partition_on

Fields inherited from class org.jgroups.stack.Protocol

down_prot, log, stack, stats, up_prot

Constructor Summary

PARTITION()

Method Summary

java.lang.Object	down(Event evt) An event is to be sent down the stack.
java.lang.String	getName() All protocol names have to be unique !
boolean	isPartitionOn()
void	startPartition()
void	stopPartition()
java.lang.Object	up(Event evt) An event was received from the layer below.

Methods inherited from class org.jgroups.stack.Protocol

destroy, downThreadEnabled, dumpStats, enableStats, getConfigurableObjects, getDownProtocol, getProperties, getProtocolStack, getThreadFactory, getTransport, getUpProtocol, init, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStats, setDownProtocol, setProperties, setPropertiesInternal, setProperty, setProtocolStack, setUpProtocol, start, statsEnabled, stop, upThreadEnabled

Methods inherited from class java.lang.Object

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

Field Detail

partition_on

protected boolean partition_on

local_address

protected Address local_address

Constructor Detail

PARTITION

public PARTITION()

Method Detail

getName

public java.lang.String getName()

Description copied from class: Protocol

All protocol names have to be unique !

Specified by:

getName in class Protocol

isPartitionOn

public boolean isPartitionOn()

startPartition

public void startPartition()

stopPartition

public void stopPartition()

down

public java.lang.Object down(Event evt)

Description copied from class: Protocol

An event is to be sent down the stack. The layer may want to examine its type and perform some action on it, depending on the event's type. If the event is a message MSG, then the layer may need to add a header to it (or do nothing at all) before sending it down the stack using down_prot.down(). In case of a GET_ADDRESS event (which tries to retrieve the stack's address from one of the bottom layers), the layer may need to send a new response event back up the stack using up_prot.up().

Overrides:

down in class Protocol

up

public java.lang.Object up(Event evt)

Description copied from class: Protocol

An event was received from the layer below. Usually the current layer will want to examine the event type and - depending on its type - perform some computation (e.g. removing headers from a MSG event type, or updating the internal membership list when receiving a VIEW_CHANGE event). Finally the event is either a) discarded, or b) an event is sent down the stack using down_prot.down() or c) the event (or another event) is sent up the stack using up_prot.up().

Overrides:

up in class Protocol