net.sf.appia.protocols.udpsimple
Class UdpSimpleLayer

java.lang.Object
  net.sf.appia.core.Layer
      net.sf.appia.protocols.udpsimple.UdpSimpleLayer

All Implemented Interfaces:

AppiaMulticastSupport

public class UdpSimpleLayer
extends Layer
implements AppiaMulticastSupport

Class UdpSimpleLayer is the Layer subclassing for UdpSimple protocol. This protocol serializes and deserializes SendableEvents to/from the network using UDP point-to-point or multicast sockets. The UdpSimple protocol provides the following events:

• SendableEvent: or subclasses of it, depending on the messages received from the network.
• SendableNotDeliveredEvent: to notify upper protocols that the message could not be delivered. The absense of such an event does not prove the contrary. That is, this protocol doesn't provide reliable delivery.
• UdpAsyncEvent: do not use. Used for inter-thread communication inside the protocol instance.

The protocol accepts the following events:

• RegisterSocketEvent (Require): This event instructs the protocol to bind to a specific UDP port.
• SendableEvent (Accept): sends SendableEvents to the network using its UDP socket
• ChannelInit (Accept): Initialization procedures
• Debug(Accept): Dumping status information as defined in the Appia specification.
• ChannelClose (Accept): closing procedures.
• MaxPDUSizeEvent (Accept): if requested, replies with the maximum datagram size for IP.
• MulticastInitEvent (Accept) : This event instructs the protocol to open a socket multicast.

Author:

Hugo Miranda, M.Joao Monteiro, Alexandre Pinto

See Also:

Layer, UdpSimpleSession, SendableEvent, SendableNotDeliveredEvent, RegisterSocketEvent, MulticastInitEvent, ChannelInit, Debug, ChannelClose, MaxPDUSizeEvent

Field Summary

Fields inherited from class net.sf.appia.core.Layer

evAccept, evProvide, evRequire

Constructor Summary

UdpSimpleLayer()
Standard empty constructor

Method Summary

Session

createSession()

Methods inherited from class net.sf.appia.core.Layer

channelDispose, getAcceptedEvents, getProvidedEvents, getRequiredEvents

Methods inherited from class java.lang.Object

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

Constructor Detail

UdpSimpleLayer

public UdpSimpleLayer()

Standard empty constructor

Method Detail

createSession

public Session createSession()

Specified by:

createSession in class Layer