public class PERF extends Protocol
Because of different wall times between different machines, PERF should only be used for members in the same JVM. For members in different processes, physical clocks have to be synchronized: if they are only a few milliseconds aprt, the values will be incorrect. For example, to write all performance data to a file, do the following:
trace=true
in jgroups.properties
trace0=PERF.up DEBUG /tmp/trace.perf
. This will write
all trace output to the given file.
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 and Description |
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PERF() |
Modifier and Type | Method and Description |
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void |
down(Event evt)
An event is to be sent down the stack.
|
java.lang.String |
getName()
All protocol names have to be unique !
|
boolean |
setProperties(java.util.Properties props)
Configures the protocol initially.
|
void |
start()
This method is called on a
Channel.connect(String) . |
void |
up(Event evt)
An event was received from the layer below.
|
destroy, 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, stop, stopInternal, upThreadEnabled
public java.lang.String getName()
public boolean setProperties(java.util.Properties props)
Protocol
"loopback=false;unicast_inport=4444"
setProperties
in class Protocol
public void start() throws java.lang.Exception
Protocol
Channel.connect(String)
. Starts work.
Protocols are connected and queues are ready to receive events.
Will be called from bottom to top. This call will replace
the START and START_OK events.start
in class Protocol
java.lang.Exception
- Thrown if protocol cannot be started successfully. This will cause the ProtocolStack
to fail, so Channel.connect(String)
will throw an exceptionpublic void up(Event evt)
Protocol
passDown()
or c) the event (or another event) is sent up
the stack using passUp()
.public void down(Event evt)
Protocol
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()
.Copyright ? 1998-2006 Bela Ban. All Rights Reserved.