Package org.jgroups.tests

Class PingPong

java.lang.Object

org.jgroups.tests.PingPong

All Implemented Interfaces:

Receiver

public class PingPong
extends Object
implements Receiver

Simple protocol to test round trip times. Requests are [PING], responses are [PONG]. Start multiple instances and press 'return' to get the round trip times for all nodes in the cluster

See PingPongDatagram for the same program using MulticastSockets

Field Summary

Fields

Modifier and Type	Field	Description
(package private) JChannel	ch
(package private) final List<Address>	members
(package private) static final byte	PING
(package private) static final byte[]	PING_REQ
(package private) static final byte	PONG
(package private) static final byte[]	PONG_RSP
(package private) long	start

Constructor Summary

Constructors

Constructor	Description
PingPong()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)
void	receive(Message msg)	Called when a message is received.
void	start(String props, String name, boolean unicast)
void	viewAccepted(View new_view)	Called when a change in membership has occurred.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jgroups.Receiver

block, getState, receive, setState, unblock

Field Details

ch

JChannel ch

PING

static final byte PING

See Also:

• Constant Field Values

PONG

static final byte PONG

See Also:

• Constant Field Values

PING_REQ

static final byte[] PING_REQ

PONG_RSP

static final byte[] PONG_RSP

start

long start

members

final List<Address> members

Constructor Details

PingPong

public PingPong()

Method Details

start

public void start(String props,
 String name,
 boolean unicast)
           throws Exception

Throws:

Exception

viewAccepted

public void viewAccepted(View new_view)

Description copied from interface: Receiver

Called when a change in membership has occurred. No long running actions, sending of messages or anything that could block should be done in this callback. If some long running action needs to be performed, it should be done in a separate thread.

Note that on reception of the first view (a new member just joined), the channel will not yet be in the connected state. This only happens when JChannel.connect(String) returns.

Specified by:

viewAccepted in interface Receiver

receive

public void receive(Message msg)

Description copied from interface: Receiver

Called when a message is received.

Specified by:

receive in interface Receiver

Parameters:

msg - The message

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception