Class TCP

All Implemented Interfaces:
BasicConnectionTable.Receiver

public class TCP extends BasicTCP implements BasicConnectionTable.Receiver
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
  • Constructor Details

    • TCP

      public TCP()
  • Method Details

    • getName

      public String getName()
      Specified by:
      getName in class Protocol
    • getOpenConnections

      public int getOpenConnections()
    • printConnections

      public String printConnections()
      Specified by:
      printConnections in class BasicTCP
    • setProperties

      public boolean setProperties(Properties props)
      Setup the Protocol instance acording to the configuration string
      Overrides:
      setProperties in class BasicTCP
      Returns:
      true if no other properties are left. false if the properties still have data in them, ie , properties are left over and not handled by the protocol stack
    • send

      public void send(Address dest, byte[] data, int offset, int length) throws Exception
      Specified by:
      send in class BasicTCP
      Throws:
      Exception
    • retainAll

      public void retainAll(Collection<Address> members)
      Specified by:
      retainAll in class BasicTCP
    • start

      public void start() throws Exception
      Description copied from class: TP
      Creates the unicast and multicast sockets and starts the unicast and multicast receiver threads
      Overrides:
      start in class TP
      Throws:
      Exception - Thrown if protocol cannot be started successfully. This will cause the ProtocolStack to fail, so Channel.connect(String) will throw an exception
    • stop

      public void stop()
      Description copied from class: Protocol
      This method is called on a Channel.disconnect(). Stops work (e.g. by closing multicast socket). Will be called from top to bottom. This means that at the time of the method invocation the neighbor protocol below is still working. This method will replace the STOP, STOP_OK, CLEANUP and CLEANUP_OK events. The ProtocolStack guarantees that when this method is called all messages in the down queue will have been flushed
      Overrides:
      stop in class TP
    • getConnectionTable

      protected ConnectionTable getConnectionTable(long reaperInterval, long connExpireTime, InetAddress bindAddress, InetAddress externalAddress, int startPort, int endPort, PortsManager pm) throws Exception
      Parameters:
      reaperInterval -
      connExpireTime -
      bindAddress -
      startPort -
      Returns:
      ConnectionTable Sub classes overrides this method to initialize a different version of ConnectionTable.
      Throws:
      Exception