org.jgroups.protocols
Class SEQUENCER
java.lang.Object
org.jgroups.stack.Protocol
org.jgroups.protocols.SEQUENCER
public class SEQUENCER
- extends Protocol
Implementation of total order protocol using a sequencer. Consult doc/design/SEQUENCER.txt for details
- Version:
- $Id: SEQUENCER.java,v 1.11.2.1 2007/04/27 08:03:52 belaban Exp $
- Author:
- Bela Ban
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 |
Methods inherited from class org.jgroups.stack.Protocol |
destroy, downThreadEnabled, enableStats, getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, handleSpecialDownEvent, init, passDown, passUp, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, 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 |
SEQUENCER
public SEQUENCER()
isCoordinator
public boolean isCoordinator()
getCoordinator
public Address getCoordinator()
getLocalAddress
public Address getLocalAddress()
getName
public java.lang.String getName()
- Specified by:
getName
in class Protocol
getForwarded
public long getForwarded()
getBroadcast
public long getBroadcast()
getReceivedForwards
public long getReceivedForwards()
getReceivedBroadcasts
public long getReceivedBroadcasts()
resetStats
public void resetStats()
- Overrides:
resetStats
in class Protocol
dumpStats
public java.util.Map dumpStats()
- Overrides:
dumpStats
in class Protocol
printStats
public java.lang.String printStats()
- Overrides:
printStats
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
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
up
public void 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
passDown()
or c) the event (or another event) is sent up
the stack using passUp()
.
- Overrides:
up
in class Protocol
Copyright ? 1998-2006 Bela Ban. All Rights Reserved.