Package org.jgroups.protocols

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 Detail

      • TCP

        public TCP()

    • Method Detail

      • getName

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

      • getOpenConnections

        public int getOpenConnections()

      • setProperties

        public boolean setProperties​(java.util.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 java.lang.Exception
        Specified by:
        send in class BasicTCP
        Throws:
        java.lang.Exception

      • retainAll

        public void retainAll​(java.util.Collection<Address> members)
        Specified by:
        retainAll in class BasicTCP

      • start

        public void start()
           throws java.lang.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:
        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

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