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

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

All Implemented Interfaces:

ChannelInterceptor, Heartbeat, MembershipListener

public class TwoPhaseCommitInterceptor
extends ChannelInterceptorBase

Title:

Description:

Company:

Version:

1.0

Author:

not attributable

START_DATA

public static final byte[] START_DATA

END_DATA

public static final byte[] END_DATA

messages

protected java.util.HashMap messages

expire

protected long expire

deepclone

protected boolean deepclone

TwoPhaseCommitInterceptor

public TwoPhaseCommitInterceptor()

sendMessage

public void sendMessage(Member[] destination,
                        ChannelMessage msg,
                        InterceptorPayload payload)
                 throws ChannelException

Description copied from interface: ChannelInterceptor

The sendMessage method is called when a message is being sent to one more destinations. The interceptor can modify any of the parameters and then pass on the message down the stack by invoking getNext().sendMessage(destination,msg,payload)
Alternatively the interceptor can stop the message from being sent by not invoking getNext().sendMessage(destination,msg,payload)
If the message is to be sent asynchronous the application can be notified of completion and errors by passing in an error handler attached to a payload object.
The ChannelMessage.getAddress contains Channel.getLocalMember, and can be overwritten to simulate a message sent from another node.

Specified by:

sendMessage in interface ChannelInterceptor

Overrides:

sendMessage in class ChannelInterceptorBase

Parameters:

destination - Member[] - the destination for this message

msg - ChannelMessage - the message to be sent

payload - InterceptorPayload - the payload, carrying an error handler and future useful data, can be null

Throws:

ChannelException

See Also:

ErrorHandler, InterceptorPayload

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

getDeepclone

public boolean getDeepclone()

getExpire

public long getExpire()

setDeepclone

public void setDeepclone(boolean deepclone)

setExpire

public void setExpire(long expire)

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