org.javagroups.protocols
Class SHUFFLE

java.lang.Object
  |
  +--org.javagroups.stack.Protocol
        |
        +--org.javagroups.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

Fields inherited from class org.javagroups.stack.Protocol
down_handler, down_prot, down_queue, down_thread, observer, props, stack, up_handler, up_prot, up_queue, up_thread
 
Constructor Summary
SHUFFLE()
           
 
Method Summary
 void down(Event evt)
          An event is to be sent down the stack.
 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 up(Event evt)
          Adds upcoming messages to the messages List<\code> where the messagesHandler<\code> retrieves them.
 
Methods inherited from class org.javagroups.stack.Protocol
getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, init, passDown, passUp, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, startDownHandler, startUpHandler, stopInternal
 
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()
Overrides:
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

down

public void 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 passDown(). 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 passUp().
Overrides:
down 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


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