Package org.jgroups.protocols

Class SHARED_LOOPBACK

  • All Implemented Interfaces:
    AdditionalJmxObjects, DiagnosticsHandler.ProbeHandler
    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 at maximum speed.
    Author:
    Bela Ban

    • Field Detail

      • port

        protected short port

      • curr_view

        protected volatile View curr_view

      • is_server

        protected volatile boolean is_server

      • is_coord

        protected volatile boolean is_coord

      • routing_table

        protected static final java.util.Map<AsciiString,​java.util.Map<Address,​SHARED_LOOPBACK>> routing_table
        Map of cluster names and address-protocol mappings. Used for routing messages to all or single members

    • Constructor Detail

      • SHARED_LOOPBACK

        public SHARED_LOOPBACK()

    • Method Detail

      • supportsMulticasting

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

      • getView

        public View getView()

      • isServer

        public boolean isServer()

      • isCoord

        public boolean isCoord()

      • toString

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

      • dumpRoutingTable

        public static java.lang.String dumpRoutingTable()

      • sendMulticast

        public void sendMulticast​(byte[] data,
                          int offset,
                          int length)
                   throws java.lang.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
        Throws:
        java.lang.Exception

      • sendUnicast

        public void sendUnicast​(PhysicalAddress dest,
                        byte[] data,
                        int offset,
                        int length)
                 throws java.lang.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
        Throws:
        java.lang.Exception

      • sendToSingleMember

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

      • getDiscoveryResponsesFor

        public static java.util.List<PingData> getDiscoveryResponsesFor​(java.lang.String cluster_name)

      • getInfo

        public java.lang.String getInfo()
        Specified by:
        getInfo in class TP

      • down

        public java.lang.Object down​(Event evt)
        Description copied from class: Protocol
        An event is to be sent down the stack. A protocol may want to examine its type and perform some action on it, depending on the event's type. If the event is a message MSG, then the protocol may need to add a header to it (or do nothing at all) before sending it down the stack using down_prot.down().
        Overrides:
        down in class TP

      • 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 TP
        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

      • stop

        public void stop()
        Description copied from class: Protocol
        This method is called on a JChannel.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

      • destroy

        public void destroy()
        Description copied from class: Protocol
        This method is called on a JChannel.close(). Does some cleanup; after the call the VM will terminate
        Overrides:
        destroy in class TP

      • handleViewChange

        protected void handleViewChange​(View v)

      • unregister

        protected static void unregister​(AsciiString cluster,
                                 Address local_addr)