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).

      if (service.cacheManager == null) {
         log.warn("Cache manager is not ready!");
         return;
      }
      for (JChannel channel : getChannels()) {
         DISCARD discard = (DISCARD)channel.getProtocolStack().findProtocol(DISCARD.class); 
         if (discard != null) {
            discard.setDiscardAll(false);            
         } else {
            log.debug("No DISCARD protocol in stack for " + channel.getName());
         }
      }
      log.debug("Stopped discarding.");

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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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   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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   @Override
   protected void createCacheManagers() throws Throwable {
      ConfigurationBuilder defaultConfig = getDefaultClusteredCacheConfig(CacheMode.DIST_SYNC, false);
      createClusteredCaches(3, defaultConfig, new TransportFlags().withFD(true).withMerge(true));


      DISCARD d1 = TestingUtil.getDiscardForCache(cache(0));
      d1.setExcludeItself(true);
      DISCARD d2 = TestingUtil.getDiscardForCache(cache(1));
      d2.setExcludeItself(true);
      DISCARD d3 = TestingUtil.getDiscardForCache(cache(2));
      d3.setExcludeItself(true);
      discard = new DISCARD[]{d1, d2, d3};
   }

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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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            fork(new Callable<Void>() {
               @Override
               public Void call() throws Exception {
                  log.info("KILLING the c1 cache");
                  try {
                     DISCARD d3 = TestingUtil.getDiscardForCache(c1);
                     d3.setDiscardAll(true);
                     d3.setExcludeItself(true);
                     TestingUtil.killCacheManagers(manager(c1));
                  } catch (Exception e) {
                     log.info("there was some exception while killing cache");
                  }
                  return null;

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   @Override
   protected void createCacheManagers() throws Throwable {
      ConfigurationBuilder defaultConfig = getDefaultClusteredCacheConfig(CacheMode.DIST_SYNC, false);
      createClusteredCaches(3, defaultConfig, new TransportFlags().withFD(true).withMerge(true));


      DISCARD d1 = TestingUtil.getDiscardForCache(cache(0));
      d1.setExcludeItself(true);
      DISCARD d2 = TestingUtil.getDiscardForCache(cache(1));
      d2.setExcludeItself(true);
      DISCARD d3 = TestingUtil.getDiscardForCache(cache(2));
      d3.setExcludeItself(true);
      discard = new DISCARD[]{d1, d2, d3};
   }

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   protected void crashCacheManagers(EmbeddedCacheManager... cacheManagers) {
      for (EmbeddedCacheManager cm : cacheManagers) {
         JGroupsTransport t = (JGroupsTransport) cm.getGlobalComponentRegistry().getComponent(Transport.class);
         Channel channel = t.getChannel();
         try {
            DISCARD discard = new DISCARD();
            discard.setDiscardAll(true);
            channel.getProtocolStack().insertProtocol(discard, ProtocolStack.ABOVE, TP.class);
         } catch (Exception e) {
            log.warn("Problems inserting discard", e);
            throw new RuntimeException(e);
         }

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