Package 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, TcpPingInterceptorMBean, Heartbeat, MembershipListener

public class TcpPingInterceptor
extends ChannelInterceptorBase
implements TcpPingInterceptorMBean

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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	TcpPingInterceptor.PingThread

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

ChannelInterceptor.InterceptorEvent

Field Summary

Fields

Modifier and Type	Field	Description
protected static final AtomicInteger	cnt
protected long	interval
protected boolean	running
protected static final StringManager	sm
protected boolean	staticOnly
protected static final byte[]	TCP_PING_DATA
protected TcpPingInterceptor.PingThread	thread
protected boolean	useThread

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

optionFlag

Constructor Summary

Constructors

Constructor	Description
TcpPingInterceptor()

Method Summary

Modifier and Type	Method	Description
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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.catalina.tribes.group.interceptors.TcpPingInterceptorMBean

getOptionFlag

Field Details

sm

protected static final StringManager sm

TCP_PING_DATA

protected static final 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 final AtomicInteger cnt

Constructor Details

TcpPingInterceptor

public TcpPingInterceptor()

Method Details

start

public void start(int svc)
           throws ChannelException

Description copied from interface: ChannelInterceptor

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
Channel.DEFAULT - will start all services
Channel.MBR_RX_SEQ - starts the membership receiver
Channel.MBR_TX_SEQ - starts the membership broadcaster
Channel.SND_TX_SEQ - starts the replication transmitter
Channel.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 interface: ChannelInterceptor

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
Channel.DEFAULT - will shutdown all services
Channel.MBR_RX_SEQ - stops the membership receiver
Channel.MBR_TX_SEQ - stops the membership broadcaster
Channel.SND_TX_SEQ - stops the replication transmitter
Channel.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()

Specified by:

getInterval in interface TcpPingInterceptorMBean

setInterval

public void setInterval(long interval)

setUseThread

public void setUseThread(boolean useThread)

setStaticOnly

public void setStaticOnly(boolean staticOnly)

getUseThread

public boolean getUseThread()

Specified by:

getUseThread in interface TcpPingInterceptorMBean

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