Examples of org.jgroups.protocols.pbcast.FLUSH

org.jgroups.protocols.pbcast.FLUSH
Flush, as it name implies, forces group members to flush their pending messages while blocking them to send any additional messages. The process of flushing acquiesces the group so that state transfer or a join can be done. It is also called stop-the-world model as nobody will be able to send messages while a flush is in process.
Flush is needed for:
(1) State transfer. When a member requests state transfer, the coordinator tells everyone to stop sending messages and waits for everyone's ack. Then it asks the application for its state and ships it back to the requester. After the requester has received and set the state successfully, the coordinator tells everyone to resume sending messages.
(2) View changes (e.g.a join). Before installing a new view V2, flushing would ensure that all messages *sent* in the current view V1 are indeed *delivered* in V1, rather than in V2 (in all non-faulty members). This is essentially Virtual Synchrony. @author Vladimir Blagojevic @since 2.4


        public Channel createChannel(final JChannel ch) throws Exception {
            JChannel retval = new JChannel(ch);
            retval.setOpt(Channel.BLOCK, ch.getOpt(Channel.BLOCK));
            if(useFlush())
                Util.addFlush(retval, new FLUSH());
            return retval;
        }

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        private JChannel createChannel(String configFile) throws Exception {
            JChannel ch = new JChannel(configFile);
            ch.setOpt(Channel.BLOCK, useBlocking());
            if(useFlush())
                Util.addFlush(ch, new FLUSH());
            return ch;
        }

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        when(broadcaster.broadcast("message")).thenReturn(broadcastedMessage);
        
        JChannel channel1 = new JChannel();
        JChannel channel2 = new JChannel();
        
        channel1.getProtocolStack().insertProtocolAtTop(new FLUSH());
        channel2.getProtocolStack().insertProtocolAtTop(new FLUSH());
        
        JGroupsChannel node1 = new JGroupsChannel(channel1, "cluster");
        JGroupsChannel node2 = new JGroupsChannel(channel2, "cluster");
        
        node1.addBroadcaster(broadcaster);

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        return result;
    }




    protected JChannel createChannel(String name) throws Exception {
        return new JChannel(Util.getTestStack(new FLUSH())).name(name);
    }

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        }
    }




    protected JChannel createChannel(String name) throws Exception {
        return new JChannel(Util.getTestStack(new STATE_TRANSFER(), new FLUSH())).name(name);
    }

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    protected static Protocol[] getProps() {
        return modify(Util.getTestStack());
    }


    protected static Protocol[] getFlushProps() {
        return modify(Util.getTestStack(new FLUSH()));
    }

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                map.stop();
        }
    }


    protected JChannel createChannel(String name) throws Exception {
        return new JChannel(Util.getTestStack(new STATE_TRANSFER(), new FLUSH())).name(name);
    }

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          new NAKACK2(),
          new UNICAST3(),
          new STABLE(),
          new GMS(),
          new FRAG2().fragSize(8000),
          new FLUSH()
        };


        return new JChannel(protocols).name(name);
    }

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          new NAKACK2(),
          new UNICAST3(),
          new STABLE(),
          new GMS(),
          new FRAG2().fragSize(8000),
          new FLUSH()
        };


        return new JChannel(protocols).name(name);
    }

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Related Classes of org.jgroups.protocols.pbcast.FLUSH

org.atmosphere.plugin.jgroups.JGroupsChannelTest

org.jgroups.Address

org.jgroups.Event

org.jgroups.Message

org.jgroups.protocols.GMS_MergeTest

org.jgroups.tests.ChannelTestBase$DefaultChannelTestFactory

org.jgroups.tests.ConcurrentFlushTest

org.jgroups.tests.ConcurrentStartupTest

org.jgroups.tests.FlushWithChannelJoinsAndFailuresTest

org.jgroups.tests.ReconciliationTest

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