com.h3c.of.ctl.pkt

Class SequencedPacketAdapter

java.lang.Object

com.h3c.of.ctl.pkt.SequencedPacketAdapter

All Implemented Interfaces:

SequencedPacketListener

public class SequencedPacketAdapter
extends Object
implements SequencedPacketListener

An adapter for SequencedPacketListener that provides default implementations of the event methods. This class can be extended as an alternative to implementing SequencedPacketListener directly, allowing subclasses to rely on the default behavior of methods they don't want to implement themselves.

Constructor Summary

Constructors

Constructor and Description
SequencedPacketAdapter()

Method Summary

Methods

Modifier and Type	Method and Description
void	errorEvent(ErrorEvent event) This callback will be invoked if an unexpected error occurred during the sequencer's attempt to send the Packet-Out message back to the datapath via the controller, as a result of the packet listener returning true from its event() callback.
boolean	event(MessageContext context) Callback invoked when a Packet-In event is to be processed.

Methods inherited from class java.lang.Object

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

Constructor Detail

SequencedPacketAdapter

public SequencedPacketAdapter()

Method Detail

event

public boolean event(MessageContext context)

Callback invoked when a Packet-In event is to be processed.

The supplied context contains the message event, and is used to capture any processing hints that might be required downstream. This includes possibly modifying a "work-in-progress" Packet-Out message attached to the context.

A value of true should be returned (by a DIRECTOR) to indicate to the sequencer that the Packet-Out message is ready to be dispatched back to the source datapath. ADVISORs and OBSERVERs should always return false.

Note that even after a listener indicates that the packet has been handled, the context is still passed down the chain of listeners; it is expected that no further processing will be done by downstream listeners, other than observing the result of processing.

This default implementation does nothing with the supplied context and always returns false.

Specified by:

event in interface SequencedPacketListener

Parameters:

context - the message context

Returns:

false

errorEvent

public void errorEvent(ErrorEvent event)

This callback will be invoked if an unexpected error occurred during the sequencer's attempt to send the Packet-Out message back to the datapath via the controller, as a result of the packet listener returning true from its event() callback.

This default implementation does nothing with the supplied event.

Specified by:

errorEvent in interface SequencedPacketListener

Parameters:

event - the error event