Package org.jgroups.protocols

Class FD_ICMP

  • public class FD_ICMP
extends FD
    Protocol which uses InetAddress.isReachable() to check whether a given host is up or not, taking 1 argument; the host name of the host to be pinged. Note that this protocol only works with JDK 5 ! The implementation of this may or may not use ICMP ! An alternative is to create a TCP connection to port 7 (echo service) and see whether it works ! This is obviously done in JDK 5, so unless an echo service is configured to run, this won't work...
    Version:
    $Id: FD_ICMP.java,v 1.9 2007/08/27 08:09:19 belaban Exp $
    Author:
    Bela Ban

    • Constructor Detail

      • FD_ICMP

        public FD_ICMP()

    • Method Detail

      • getName

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

      • setProperties

        public boolean setProperties​(java.util.Properties props)
        Description copied from class: Protocol
        Configures the protocol initially. A configuration string consists of name=value items, separated by a ';' (semicolon), e.g.:
         "loopback=false;unicast_inport=4444"
        Overrides:
        setProperties in class FD

      • 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 FD
        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

      • up

        public java.lang.Object 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 down_prot.down() or c) the event (or another event) is sent up the stack using up_prot.up().
        Overrides:
        up in class FD

      • createMonitor

        protected FD.Monitor createMonitor()