org.jgroups.protocols

Class SHUFFLE

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.SHUFFLE

All Implemented Interfaces:

java.lang.Runnable

public class SHUFFLE
extends Protocol
implements java.lang.Runnable

This layer shuffles upcoming messages, put it just above your bottom layer. If you system sends less than 2 messages per sec you can notice a latency due to this layer.

Author:

Gianluca Collot

Field Summary

Fields inherited from class org.jgroups.stack.Protocol

down_handler, down_prot, down_queue, down_thread, down_thread_prio, log, observer, props, stack, stats, up_handler, up_prot, up_queue, up_thread, up_thread_prio

Constructor Summary

Constructors

Constructor and Description
SHUFFLE()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getName()
void	run() Removes a random chosen message from the messages List<\code> if there are less than 10 messages in the List it waits some time to ensure to chose from a set of messages > 1.
boolean	setProperties(java.util.Properties props) Configures the protocol initially.
void	start() Starts the messagesHandler<\code>
void	stop() Stops the messagesHandler
void	up(Event evt) Adds upcoming messages to the messages List<\code> where the messagesHandler<\code> retrieves them.

Methods inherited from class org.jgroups.stack.Protocol

destroy, down, downThreadEnabled, dumpStats, enableStats, getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, handleSpecialDownEvent, init, passDown, passUp, printStats, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, resetStats, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, startDownHandler, startUpHandler, statsEnabled, stopInternal, upThreadEnabled

Methods inherited from class java.lang.Object

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

Constructor Detail

SHUFFLE

public SHUFFLE()

Method Detail

getName

public java.lang.String getName()

Specified by:

getName in class Protocol

setProperties

public boolean setProperties(java.util.Properties props)

Description copied from class: Protocol

Configures the protocol initially. A configuration string consists of name=value items, separated by a ';' (semicolon), e.g.:

 "loopback=false;unicast_inport=4444"
 

Overrides:

setProperties in class Protocol

up

public void up(Event evt)

Adds upcoming messages to the messages List<\code> where the messagesHandler<\code> retrieves them.

Overrides:

up in class Protocol

start

public void start()
           throws java.lang.Exception

Starts the messagesHandler<\code>

Overrides:

start in class Protocol

Throws:

java.lang.Exception - Thrown if protocol cannot be started successfully. This will cause the ProtocolStack to fail, so Channel.connect(String) will throw an exception

stop

public void stop()

Stops the messagesHandler

Overrides:

stop in class Protocol

run

public void run()

Removes a random chosen message from the messages List<\code> if there are less than 10 messages in the List it waits some time to ensure to chose from a set of messages > 1.

Specified by:

run in interface java.lang.Runnable