org.jgroups.protocols

Class PERF_TP

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.PERF_TP

public class PERF_TP
extends Protocol

Measures the time for a message to travel from the channel to the transport

Author:

Bela Ban

Field Summary

Fields inherited from class org.jgroups.stack.Protocol

down_prot, ergonomics, id, log, name, stack, stats, up_prot

Constructor Summary

Constructors

Constructor and Description
PERF_TP()

Method Summary

Modifier and Type	Method and Description
boolean	done()
Object	down(Event evt) Caller by the layer above this layer.
static PERF_TP	getInstance()
long	getNumMessages()
long	getTotalTime()
void	init() Called after instance has been created (null constructor) and before protocol is started.
void	reset()
void	setExpectedMessages(long m)
void	start() This method is called on a Channel.connect(String).
String	toString()
Object	up(Event evt) An event was received from the layer below.

Methods inherited from class org.jgroups.stack.Protocol

destroy, downThreadEnabled, dumpStats, enableStats, getConfigurableObjects, getDownProtocol, getId, getLevel, getName, getProperties, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getValue, isErgonomics, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStats, setDownProtocol, setErgonomics, setId, setLevel, setProperties, setPropertiesInternal, setProperty, setProtocolStack, setSocketFactory, setUpProtocol, setValue, setValues, statsEnabled, stop, upThreadEnabled

Methods inherited from class java.lang.Object

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

Constructor Detail

PERF_TP

public PERF_TP()

Method Detail

getInstance

public static PERF_TP getInstance()

toString

public String toString()

Overrides:

toString in class Object

done

public boolean done()

getNumMessages

public long getNumMessages()

setExpectedMessages

public void setExpectedMessages(long m)

reset

public void reset()

getTotalTime

public long getTotalTime()

init

public void init()
          throws Exception

Description copied from class: Protocol

Called after instance has been created (null constructor) and before protocol is started. Properties are already set. Other protocols are not yet connected and events cannot yet be sent.

Overrides:

init in class Protocol

Throws:

Exception - Thrown if protocol cannot be initialized successfully. This will cause the ProtocolStack to fail, so the channel constructor will throw an exception

start

public void start()
           throws Exception

Description copied from class: Protocol

This method is called on a 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.

Overrides:

start in class Protocol

Throws:

Exception - Thrown if protocol cannot be started successfully. This will cause the ProtocolStack to fail, so Channel.connect(String) will throw an exception

down

public Object down(Event evt)

Caller by the layer above this layer. Usually we just put this Message into the send queue and let one or more worker threads handle it. A worker thread then removes the Message from the send queue, performs a conversion and adds the modified Message to the send queue of the layer below it, by calling Down).

Overrides:

down in class Protocol

up

public 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 using down_prot.down() or c) the event (or another event) is sent up the stack using up_prot.up().

Overrides:

up in class Protocol