Package org.jgroups.protocols
Class SEQUENCER
- java.lang.Object
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- org.jgroups.stack.Protocol
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- org.jgroups.protocols.SEQUENCER
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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 1.20 2007/10/24 09:01:11 belaban Exp $
- Author:
- Bela Ban
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
SEQUENCER.SequencerHeader
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Constructor Summary
Constructors Constructor Description SEQUENCER()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
down(Event evt)
An event is to be sent down the stack.java.util.Map<java.lang.String,java.lang.Object>
dumpStats()
long
getBroadcast()
Address
getCoordinator()
long
getForwarded()
Address
getLocalAddress()
java.lang.String
getName()
long
getReceivedBroadcasts()
long
getReceivedForwards()
boolean
isCoordinator()
java.lang.String
printStats()
void
resetStats()
boolean
setProperties(java.util.Properties props)
Configures the protocol initially.java.lang.Object
up(Event evt)
An event was received from the layer below.-
Methods inherited from class org.jgroups.stack.Protocol
destroy, downThreadEnabled, enableStats, getDownProtocol, getProperties, getProtocolStack, getThreadFactory, getTransport, getUpProtocol, init, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, setDownProtocol, setPropertiesInternal, setProtocolStack, setUpProtocol, start, statsEnabled, stop, upThreadEnabled
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Method Detail
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isCoordinator
public boolean isCoordinator()
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getCoordinator
public Address getCoordinator()
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getLocalAddress
public Address getLocalAddress()
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getForwarded
public long getForwarded()
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getBroadcast
public long getBroadcast()
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getReceivedForwards
public long getReceivedForwards()
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getReceivedBroadcasts
public long getReceivedBroadcasts()
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resetStats
public void resetStats()
- Overrides:
resetStats
in classProtocol
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dumpStats
public java.util.Map<java.lang.String,java.lang.Object> dumpStats()
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printStats
public java.lang.String printStats()
- Overrides:
printStats
in classProtocol
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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 classProtocol
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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 usingdown_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 usingup_prot.up()
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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 usingdown_prot.down()
or c) the event (or another event) is sent up the stack usingup_prot.up()
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