org.apache.catalina.tribes.group.interceptors
Class TcpPingInterceptor

java.lang.Object
  org.apache.catalina.tribes.group.ChannelInterceptorBase
      org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor

All Implemented Interfaces:

ChannelInterceptor, Heartbeat, MembershipListener

public class TcpPingInterceptor
extends ChannelInterceptorBase

Sends a ping to all members. Configure this interceptor with the TcpFailureDetector below it, and the TcpFailureDetector will act as the membership guide.

Version:

1.0

Author:

Filip Hanik

Nested Class Summary

protected class

TcpPingInterceptor.PingThread

Nested classes/interfaces inherited from interface org.apache.catalina.tribes.ChannelInterceptor

ChannelInterceptor.InterceptorEvent

Field Summary

protected static AtomicInteger	cnt
protected long	interval
protected boolean	running
protected boolean	staticOnly
protected static byte[]	TCP_PING_DATA
protected TcpPingInterceptor.PingThread	thread
protected boolean	useThread

Fields inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

optionFlag

Constructor Summary

TcpPingInterceptor()

Method Summary

long	getInterval()
boolean	getStaticOnly()
boolean	getUseThread()
void	heartbeat() The heartbeat() method gets invoked periodically to allow interceptors to clean up resources, time out object and perform actions that are unrelated to sending/receiving data.
void	messageReceived(ChannelMessage msg) the messageReceived is invoked when a message is received.
protected void	sendPing()
protected void	sendPingMessage(Member[] members)
void	setInterval(long interval)
void	setStaticOnly(boolean staticOnly)
void	setUseThread(boolean useThread)
void	start(int svc) Starts up the channel.
void	stop(int svc) Shuts down the channel.

Methods inherited from class org.apache.catalina.tribes.group.ChannelInterceptorBase

accept, fireInterceptorEvent, getLocalMember, getMember, getMembers, getNext, getOptionFlag, getPrevious, hasMembers, memberAdded, memberDisappeared, okToProcess, sendMessage, setNext, setOptionFlag, setPrevious

Methods inherited from class java.lang.Object

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

Field Detail

TCP_PING_DATA

protected static byte[] TCP_PING_DATA

interval

protected long interval

useThread

protected boolean useThread

staticOnly

protected boolean staticOnly

running

protected volatile boolean running

thread

protected TcpPingInterceptor.PingThread thread

cnt

protected static AtomicInteger cnt

Constructor Detail

TcpPingInterceptor

public TcpPingInterceptor()

Method Detail

start

public void start(int svc)
           throws ChannelException

Description copied from class: ChannelInterceptorBase

Starts up the channel. This can be called multiple times for individual services to start The svc parameter can be the logical or value of any constants

Specified by:

start in interface ChannelInterceptor

Overrides:

start in class ChannelInterceptorBase

Parameters:

svc - int value of
DEFAULT - will start all services
MBR_RX_SEQ - starts the membership receiver
MBR_TX_SEQ - starts the membership broadcaster
SND_TX_SEQ - starts the replication transmitter
SND_RX_SEQ - starts the replication receiver

Throws:

ChannelException - if a startup error occurs or the service is already started.

See Also:

Channel

stop

public void stop(int svc)
          throws ChannelException

Description copied from class: ChannelInterceptorBase

Shuts down the channel. This can be called multiple times for individual services to shutdown The svc parameter can be the logical or value of any constants

Specified by:

stop in interface ChannelInterceptor

Overrides:

stop in class ChannelInterceptorBase

Parameters:

svc - int value of
DEFAULT - will shutdown all services
MBR_RX_SEQ - stops the membership receiver
MBR_TX_SEQ - stops the membership broadcaster
SND_TX_SEQ - stops the replication transmitter
SND_RX_SEQ - stops the replication receiver

Throws:

ChannelException - if a startup error occurs or the service is already started.

See Also:

Channel

heartbeat

public void heartbeat()

Description copied from interface: ChannelInterceptor

The heartbeat() method gets invoked periodically to allow interceptors to clean up resources, time out object and perform actions that are unrelated to sending/receiving data.

Specified by:

heartbeat in interface ChannelInterceptor

Specified by:

heartbeat in interface Heartbeat

Overrides:

heartbeat in class ChannelInterceptorBase

getInterval

public long getInterval()

setInterval

public void setInterval(long interval)

setUseThread

public void setUseThread(boolean useThread)

setStaticOnly

public void setStaticOnly(boolean staticOnly)

getUseThread

public boolean getUseThread()

getStaticOnly

public boolean getStaticOnly()

sendPing

protected void sendPing()

sendPingMessage

protected void sendPingMessage(Member[] members)

messageReceived

public void messageReceived(ChannelMessage msg)

Description copied from interface: ChannelInterceptor

the messageReceived is invoked when a message is received. ChannelMessage.getAddress() is the sender, or the reply-to address if it has been overwritten.

Specified by:

messageReceived in interface ChannelInterceptor

Overrides:

messageReceived in class ChannelInterceptorBase

Parameters:

msg - ChannelMessage