Class SEQUENCER


  • public class SEQUENCER
    extends Protocol
    Implementation of total order protocol using a sequencer. Consult doc/design/SEQUENCER.txt for details
    Version:
    $Id: SEQUENCER.java,v 1.20 2007/10/24 09:01:11 belaban Exp $
    Author:
    Bela Ban
    • Constructor Detail

      • SEQUENCER

        public SEQUENCER()
    • Method Detail

      • isCoordinator

        public boolean isCoordinator()
      • getCoordinator

        public Address getCoordinator()
      • getLocalAddress

        public Address getLocalAddress()
      • getName

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

        public long getForwarded()
      • getBroadcast

        public long getBroadcast()
      • getReceivedForwards

        public long getReceivedForwards()
      • getReceivedBroadcasts

        public long getReceivedBroadcasts()
      • dumpStats

        public java.util.Map<java.lang.String,​java.lang.Object> dumpStats()
        Overrides:
        dumpStats in class Protocol
      • printStats

        public java.lang.String printStats()
        Overrides:
        printStats in class Protocol
      • 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 Protocol
      • down

        public java.lang.Object down​(Event evt)
        Description copied from class: Protocol
        An event is to be sent down the stack. The layer 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 layer may need to add a header to it (or do nothing at all) before sending it down the stack using down_prot.down(). In case of a GET_ADDRESS event (which tries to retrieve the stack's address from one of the bottom layers), the layer may need to send a new response event back up the stack using up_prot.up().
        Overrides:
        down in class Protocol
      • 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 Protocol