Package org.jgroups.protocols

Class SHARED_LOOPBACK

java.lang.Object
org.jgroups.stack.Protocol
org.jgroups.protocols.TP
org.jgroups.protocols.SHARED_LOOPBACK
public class SHARED_LOOPBACK extends TP
Loopback transport shared by all channels within the same VM. Property for testing is that no messages are lost. Allows us to test various protocols (with ProtocolTester) at maximum speed.
Author:
Bela Ban

  • Constructor Details

    • SHARED_LOOPBACK

      public SHARED_LOOPBACK()

  • Method Details

    • supportsMulticasting

      public boolean supportsMulticasting()
      Description copied from class: TP
      Whether or not hardware multicasting is supported
      Specified by:
      supportsMulticasting in class TP

    • toString

      public String toString()
      Overrides:
      toString in class TP

    • sendMulticast

      public void sendMulticast(byte[] data, int offset, int length) throws Exception
      Description copied from class: TP
      Send to all members in the group. UDP would use an IP multicast message, whereas TCP would send N messages, one for each member
      Specified by:
      sendMulticast in class TP
      Parameters:
      data - The data to be sent. This is not a copy, so don't modify it
      offset -
      length -
      Throws:
      Exception

    • sendUnicast

      public void sendUnicast(PhysicalAddress dest, byte[] data, int offset, int length) throws Exception
      Description copied from class: TP
      Send a unicast to 1 member. Note that the destination address is a *physical*, not a logical address
      Specified by:
      sendUnicast in class TP
      Parameters:
      dest - Must be a non-null unicast address
      data - The data to be sent. This is not a copy, so don't modify it
      offset -
      length -
      Throws:
      Exception

    • sendToSingleMember

      protected void sendToSingleMember(Address dest, byte[] buf, int offset, int length) throws Exception
      Overrides:
      sendToSingleMember in class TP
      Throws:
      Exception

    • getInfo

      public String getInfo()
      Specified by:
      getInfo in class TP

    • getPhysicalAddress

      protected PhysicalAddress getPhysicalAddress()
      Specified by:
      getPhysicalAddress in class TP

    • init

      public void init() throws 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 TP
      Throws:
      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 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

    • down

      public Object down(Event evt)
      Description copied from class: TP
      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 TP