org.javagroups.protocols
Class LOOPBACK

java.lang.Object
  extended byorg.javagroups.stack.Protocol
      extended byorg.javagroups.protocols.LOOPBACK

public class LOOPBACK
extends Protocol

Makes copies of outgoing messages, swaps sender and receiver and sends the message back up the stack.


Field Summary
 
Fields inherited from class org.javagroups.stack.Protocol
down_handler, down_prot, down_queue, down_thread, down_thread_prio, observer, props, stack, up_handler, up_prot, up_queue, up_thread, up_thread_prio
 
Constructor Summary
LOOPBACK()
           
 
Method Summary
 void down(Event evt)
          Caller by the layer above this layer.
 java.lang.String getName()
           
 void init()
          Called after instance has been created (null constructor) and before protocol is started.
 boolean setProperties(java.util.Properties props)
          Setup the Protocol instance acording to the configuration string
 void start()
          This method is called on a Channel.connect(String).
 java.lang.String toString()
           
 
Methods inherited from class org.javagroups.stack.Protocol
destroy, getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, passDown, passUp, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, startDownHandler, startUpHandler, stop, stopInternal, up
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

LOOPBACK

public LOOPBACK()
Method Detail

toString

public java.lang.String toString()

getName

public java.lang.String getName()
Specified by:
getName in class Protocol

setProperties

public boolean setProperties(java.util.Properties props)
Setup the Protocol instance acording to the configuration string

Overrides:
setProperties in class Protocol

init

public void init()
          throws java.lang.Exception
Description copied from class: Protocol
Called after instance has been created (null constructor) and before protocol is started. Properties are already set. Other protocols are not yet connected and events cannot yet be sent.

Overrides:
init in class Protocol
Throws:
java.lang.Exception - Thrown if protocol cannot be initialized successfully. This will cause the ProtocolStack to fail, so the channel constructor will throw an exception

start

public void start()
           throws java.lang.Exception
Description copied from class: Protocol
This method is called on a Channel.connect(String). Starts work. Protocols are connected and queues are ready to receive events. Will be called from bottom to top. This call will replace the START and START_OK events.

Overrides:
start in class Protocol
Throws:
java.lang.Exception - Thrown if protocol cannot be started successfully. This will cause the ProtocolStack to fail, so Channel.connect(String) will throw an exception

down

public void down(Event evt)
Caller by the layer above this layer. Usually we just put this Message into the send queue and let one or more worker threads handle it. A worker thread then removes the Message from the send queue, performs a conversion and adds the modified Message to the send queue of the layer below it, by calling Down).

Overrides:
down in class Protocol


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