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org.jgroups.protocols
Class MERGEFAST  

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

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public class MERGEFAST

extends org.jgroups.stack.Protocol

The coordinator attaches a small header to each (or every nth) message. If another coordinator in the same group sees the message, it will initiate the merge protocol immediately by sending a MERGE event up the stack.

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Nested Class Summary
static class	MERGEFAST.MergefastHeader

 

Field Summary
(package private)  boolean	is_coord
(package private)  org.jgroups.Address	local_addr
(package private) static java.lang.String	name

 

Fields inherited from class org.jgroups.stack.Protocol

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

 

Constructor Summary

MERGEFAST()

 

Method Summary
void	down(org.jgroups.Event evt)           An event is to be sent down the stack.
java.lang.String	getName()
(package private)  void	handleViewChange(org.jgroups.View v)
(package private)  void	sendUpMerge(org.jgroups.Address[] addresses)
void	up(org.jgroups.Event evt)           An event was received from the layer below.

 

Methods inherited from class org.jgroups.stack.Protocol

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

 

Methods inherited from class java.lang.Object

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

 

Field Detail

local_addr

org.jgroups.Address local_addr

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is_coord

boolean is_coord

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name

static final java.lang.String name

See Also:

Constant Field Values

Constructor Detail

MERGEFAST

public MERGEFAST()

Method Detail

getName

public java.lang.String getName()

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down

public void down(org.jgroups.Event evt)

Description copied from class: org.jgroups.stack.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().

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up

public void up(org.jgroups.Event evt)

Description copied from class: org.jgroups.stack.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 passDown() or c) the event (or another event) is sent up the stack using passUp().

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handleViewChange

void handleViewChange(org.jgroups.View v)

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sendUpMerge

void sendUpMerge(org.jgroups.Address[] addresses)

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