org.javagroups.protocols
Class TCP

java.lang.Object
  |
  +--org.javagroups.stack.Protocol
        |
        +--org.javagroups.protocols.TCP
All Implemented Interfaces:
ConnectionTable.ConnectionListener, ConnectionTable.Receiver

public class TCP
extends Protocol
implements ConnectionTable.Receiver, ConnectionTable.ConnectionListener

TCP based protocol. Creates a server socket, which gives us the local address of this group member. For each accept() on the server socket, a new thread is created that listens on the socket. For each outgoing message m, if m.dest is in the ougoing hashtable, the associated socket will be reused to send message, otherwise a new socket is created and put in the hashtable. When a socket connection breaks or a member is removed from the group, the corresponding items in the incoming and outgoing hashtables will be removed as well.
This functionality is in ConnectionTable, which isT used by TCP. TCP sends messages using ct.send() and registers with the connection table to receive all incoming messages.

Author:
Bela Ban

Fields inherited from class org.javagroups.stack.Protocol
down_handler, down_prot, down_queue, down_thread, observer, props, stack, up_handler, up_prot, up_queue, up_thread
 
Constructor Summary
TCP()
           
 
Method Summary
 void connectionClosed(Address peer_addr)
           
 void connectionOpened(Address peer_addr)
           
 void down(Event evt)
          Sent to destination(s) using the ConnectionTable class.
 java.lang.String getName()
           
 void receive(Message msg)
           
 boolean setProperties(java.util.Properties props)
          Setup the Protocol instance acording to the configuration string
 void startUpHandler()
          DON'T REMOVE ! This prevents the up-handler thread to be created, which essentially is superfluous: messages are received from the network rather than from a layer below.
 void startWork()
           
 java.lang.String toString()
           
 void up(Event evt)
          An event was received from the layer below.
 
Methods inherited from class org.javagroups.stack.Protocol
getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, init, passDown, passUp, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setUpProtocol, startDownHandler, stopInternal
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

TCP

public TCP()
Method Detail

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

getName

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

startUpHandler

public void startUpHandler()
DON'T REMOVE ! This prevents the up-handler thread to be created, which essentially is superfluous: messages are received from the network rather than from a layer below.
Overrides:
startUpHandler in class Protocol

up

public void up(Event evt)
Description copied from class: Protocol
An event was received from the layer below. Usually the current layer will want to examine the event type and - depending on its type - perform some computation (e.g. removing headers from a MSG event type, or updating the internal membership list when receiving a VIEW_CHANGE event). Finally the event is either a) discarded, or b) an event is sent down the stack using passDown() or c) the event (or another event) is sent up the stack using passUp().
Overrides:
up in class Protocol

down

public void down(Event evt)
Sent to destination(s) using the ConnectionTable class.
Overrides:
down in class Protocol

startWork

public void startWork()

receive

public void receive(Message msg)
Specified by:
receive in interface ConnectionTable.Receiver

connectionOpened

public void connectionOpened(Address peer_addr)
Specified by:
connectionOpened in interface ConnectionTable.ConnectionListener

connectionClosed

public void connectionClosed(Address peer_addr)
Specified by:
connectionClosed in interface ConnectionTable.ConnectionListener

setProperties

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


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