Class SEQUENCER

java.lang.Object
org.jgroups.stack.Protocol
org.jgroups.protocols.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 Details

    • SEQUENCER

      public SEQUENCER()
  • Method Details

    • isCoordinator

      public boolean isCoordinator()
    • getCoordinator

      public Address getCoordinator()
    • getLocalAddress

      public Address getLocalAddress()
    • getName

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

      public long getForwarded()
    • getBroadcast

      public long getBroadcast()
    • getReceivedForwards

      public long getReceivedForwards()
    • getReceivedBroadcasts

      public long getReceivedBroadcasts()
    • resetStats

      public void resetStats()
      Overrides:
      resetStats in class Protocol
    • dumpStats

      public Map<String,Object> dumpStats()
      Overrides:
      dumpStats in class Protocol
    • printStats

      public String printStats()
      Overrides:
      printStats in class Protocol
    • setProperties

      public boolean setProperties(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 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 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