Examples of org.jgroups.protocols.DISCARD

org.jgroups.protocols.DISCARD
Discards up or down messages based on a percentage; e.g., setting property 'up' to 0.1 causes 10% of all up messages to be discarded. Setting 'down' or 'up' to 0 causes no loss, whereas 1 discards all messages (not very useful).

        assertEquals("list is " + list, 3, list.size());
        assertTrue(list.contains(1) && list.contains(2) && list.contains(3));
    }
    
    public void testRandomRegularAndOOBMulticasts() throws Exception {
        DISCARD discard=new DISCARD();
        ProtocolStack stack=c1.getProtocolStack();
        stack.insertProtocol(discard, ProtocolStack.BELOW, NAKACK.class);
        Address dest=null; // send to all
        MyReceiver r1=new MyReceiver(), r2=new MyReceiver();
        c1.setReceiver(r1);

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            Util.sleep(2000);
            
            int split = count/2;
            
            for (int i = 0; i < split; i++) {              
                DISCARD discard=(DISCARD)((JChannel)channels[i].getChannel()).getProtocolStack().findProtocol("DISCARD");               
                for(int j=split;j<count;j++){
                    discard.addIgnoreMember(channels[j].getLocalAddress());
                }                   
            }
            
            for (int i = count-1; i >= split; i--) {              
                DISCARD discard=(DISCARD)((JChannel)channels[i].getChannel()).getProtocolStack().findProtocol("DISCARD");               
                for(int j=0;j<split;j++){
                    discard.addIgnoreMember(channels[j].getLocalAddress());
                }                   
            }
                                        
            System.out.println("Waiting for split to be detected...");
            View view;

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    private static void addDiscardProtocol(JChannel ch) throws Exception {
        ProtocolStack stack=ch.getProtocolStack();
        Protocol transport=stack.getTransport();
        DISCARD discard=new DISCARD();
        discard.setProtocolStack(ch.getProtocolStack());
        discard.start();
        stack.insertProtocol(discard, ProtocolStack.ABOVE, transport.getName());
    }

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    private static void insertDISCARD(JChannel ch, Address exclude) throws Exception {
        Properties prop = new Properties();
        prop.setProperty("excludeitself", "true"); // don't discard messages to
        // self
        DISCARD discard = new DISCARD();
        discard.setProperties(prop);
        discard.addIgnoreMember(exclude); // ignore messages from this member
        ch.getProtocolStack().insertProtocol(discard, ProtocolStack.BELOW, "NAKACK");
    }

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    }
    
    private static void addDiscardProtocol(JChannel ch) throws Exception {
        ProtocolStack stack=ch.getProtocolStack();
        Protocol transport=stack.getTransport();
        DISCARD discard=new DISCARD();
        Properties props = new Properties();
        props.setProperty("up", "1.0");
        discard.setProperties(props);
        discard.setProtocolStack(ch.getProtocolStack());
        discard.start();
        stack.insertProtocol(discard, ProtocolStack.ABOVE, transport.getName());
    }

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        UNICAST unicast=new UNICAST();
        Properties props=new Properties();
        props.setProperty("timeout", "500,1000,2000,3000");
        unicast.setProperties(props);


        DISCARD discard=new DISCARD();
        props.clear();
        props.setProperty("down", "0.1"); // discard all down message with 10% probability
        discard.setProperties(props);


        Protocol[] stack=new Protocol[]{unicast,discard};
        createStack(stack);
        _testReceptionOfAllMessages();
    }

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        ch1.setReceiver(new MyReceiver(ch1_all_received, NUM_MSGS, "ch1"));
        ch2=createChannel();
        ch2.setReceiver(new MyReceiver(ch2_all_received, NUM_MSGS, "ch2"));


        if(discard) {
            DISCARD discard_prot=new DISCARD();
            Properties properties=new Properties();
            properties.setProperty("down", "0.1");


            ch1.getProtocolStack().insertProtocol(discard_prot, ProtocolStack.BELOW, "MERGE2");
            discard_prot=new DISCARD();
            properties=new Properties();
            properties.setProperty("down", "0.1");
            ch2.getProtocolStack().insertProtocol(discard_prot, ProtocolStack.BELOW, "MERGE2");
        }

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   public static DISCARD getDiscardForCache(Cache<?, ?> c) throws Exception {
      JGroupsTransport jgt = (JGroupsTransport) TestingUtil.extractComponent(c, Transport.class);
      Channel ch = jgt.getChannel();
      ProtocolStack ps = ch.getProtocolStack();
      DISCARD discard = new DISCARD();
      ps.insertProtocol(discard, ProtocolStack.ABOVE, TP.class);
      return discard;
   }

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   public static DISCARD getDiscardForCache(Cache<?, ?> c) throws Exception {
      JGroupsTransport jgt = (JGroupsTransport) TestingUtil.extractComponent(c, Transport.class);
      Channel ch = jgt.getChannel();
      ProtocolStack ps = ch.getProtocolStack();
      DISCARD discard = new DISCARD();
      ps.insertProtocol(discard, ProtocolStack.ABOVE, TP.class);
      return discard;
   }

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      synchronized (killSync) {
         while (killState == KillRequest.KILL_STARTED) killSync.wait();
         killState = KillRequest.KILL_STARTED;
      }
      for (JChannel channel : getChannels()) {
         DISCARD discard = (DISCARD)channel.getProtocolStack().findProtocol(DISCARD.class); 
         if (discard == null) {
            discard = new DISCARD();
            log.debug("No DISCARD protocol in stack for " + channel.getName() + ", inserting new instance");
            try {
               channel.getProtocolStack().insertProtocol(discard, ProtocolStack.ABOVE, TP.class);
            } catch (Exception e) {
               log.error("Failed to insert the DISCARD protocol to stack for " + channel.getName());
               return;
            }         
         }  
         discard.setDiscardAll(true);
         // The FD_SOCK requires special handling because it uses non-standard sockets to interconnect
         FD_SOCK fdSock = (FD_SOCK)channel.getProtocolStack().findProtocol(FD_SOCK.class);
         if (fdSock != null) {
            fdSock.stopServerSocket(false);
         }

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