Examples of org.hornetq.core.cluster.DiscoveryGroup

org.hornetq.core.cluster.DiscoveryGroup
This class is used to search for members on the cluster through the opaque interface {@link BroadcastEndpoint}.
There are two current implementations, and that's probably all we will ever need.
We will probably keep both interfaces for a while as UDP is a simple solution requiring no extra dependencies which is suitable for users looking for embedded solutions. @author Tim Fox @author Clebert Suconic
Created 17 Nov 2008 13:21:45


      final InetAddress groupAddress = InetAddress.getByName(DiscoveryTest.address1);
      final int groupPort = getUDPDiscoveryPort();
      final int timeout = 500;


      DiscoveryGroup dg = new DiscoveryGroupImpl(RandomUtil.randomString(),
                                                 RandomUtil.randomString(),
                                                 null,
                                                 groupAddress,
                                                 groupPort,
                                                 timeout);
      dg.setNotificationService(notifService);


      Assert.assertEquals(0, notifListener.getNotifications().size());


      dg.start();


      Assert.assertEquals(1, notifListener.getNotifications().size());
      Notification notif = notifListener.getNotifications().get(0);
      Assert.assertEquals(NotificationType.DISCOVERY_GROUP_STARTED, notif.getType());
      Assert.assertEquals(dg.getName(), notif.getProperties()
                                             .getSimpleStringProperty(new SimpleString("name"))
                                             .toString());


      dg.stop();


      Assert.assertEquals(2, notifListener.getNotifications().size());
      notif = notifListener.getNotifications().get(1);
      Assert.assertEquals(NotificationType.DISCOVERY_GROUP_STOPPED, notif.getType());
      Assert.assertEquals(dg.getName(), notif.getProperties()
                                             .getSimpleStringProperty(new SimpleString("name"))
                                             .toString());
   }

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      }
   }


   private static DiscoveryGroup createDiscoveryGroup(String nodeID, DiscoveryGroupConfiguration config) throws Exception
   {
      DiscoveryGroup group = new DiscoveryGroup(nodeID, config.getName(),
            config.getRefreshTimeout(), config.getBroadcastEndpointFactoryConfiguration().createBroadcastEndpointFactory(), null);
      return group;
   }

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      }
   }


   private static DiscoveryGroup createDiscoveryGroup(String nodeID, DiscoveryGroupConfiguration config) throws Exception
   {
      DiscoveryGroup group = new DiscoveryGroup(nodeID, config.getName(),
            config.getRefreshTimeout(), config.getBroadcastEndpointFactoryConfiguration().createBroadcastEndpointFactory(), null);
      return group;
   }

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      TransportConfiguration live1 = generateTC();


      bg.addConnector(live1);


      DiscoveryGroup dg = new DiscoveryGroupImpl(RandomUtil.randomString(),
                                                 RandomUtil.randomString(),
                                                 null,
                                                 groupAddress,
                                                 groupPort,
                                                 timeout);


      dg.start();


      bg.broadcastConnectors();


      boolean ok = dg.waitForBroadcast(1000);


      Assert.assertTrue(ok);


      List<DiscoveryEntry> entries = dg.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live1), entries);


      bg.stop();


      dg.stop();


   }

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      TransportConfiguration live1 = generateTC();


      bg.addConnector(live1);


      DiscoveryGroup dg = new DiscoveryGroupImpl(RandomUtil.randomString(),
                                                 RandomUtil.randomString(),
                                                 localAddress,
                                                 groupAddress,
                                                 groupPort,
                                                 timeout);


      dg.start();


      bg.broadcastConnectors();


      boolean ok = dg.waitForBroadcast(1000);


      Assert.assertTrue(ok);


      List<DiscoveryEntry> entries = dg.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live1), entries);


      bg.stop();


      dg.stop();


   }

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      TransportConfiguration live1 = generateTC();


      bg.addConnector(live1);


      DiscoveryGroup dg = new DiscoveryGroupImpl(RandomUtil.randomString(),
                                                 RandomUtil.randomString(),
                                                 null,
                                                 groupAddress,
                                                 groupPort,
                                                 timeout);


      dg.start();


      bg.broadcastConnectors();


      boolean ok = dg.waitForBroadcast(1000);


      Assert.assertTrue(ok);


      List<DiscoveryEntry> entries = dg.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live1), entries);


      bg.stop();


      dg.stop();


      dg.start();


      bg.start();


      bg.broadcastConnectors();


      ok = dg.waitForBroadcast(1000);


      Assert.assertTrue(ok);


      entries = dg.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live1), entries);


      dg.stop();


      bg.stop();
   }

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      TransportConfiguration live1 = generateTC();


      bg.addConnector(live1);


      DiscoveryGroup dg = new DiscoveryGroupImpl(nodeID,
                                                 RandomUtil.randomString(),
                                                 null,
                                                 groupAddress,
                                                 groupPort,
                                                 timeout);


      dg.start();


      bg.broadcastConnectors();


      boolean ok = dg.waitForBroadcast(1000);


      Assert.assertFalse(ok);


      List<DiscoveryEntry> entries = dg.getDiscoveryEntries();


      Assert.assertNotNull(entries);


      Assert.assertEquals(0, entries.size());


      bg.stop();


      dg.stop();


   }

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      bg.addConnector(live1);


      final int port2 = getUDPDiscoveryPort(1);


      DiscoveryGroup dg = new DiscoveryGroupImpl(RandomUtil.randomString(),
                                                 RandomUtil.randomString(),
                                                 null,
                                                 groupAddress,
                                                 port2,
                                                 timeout);


      dg.start();


      bg.broadcastConnectors();


      boolean ok = dg.waitForBroadcast(1000);


      Assert.assertFalse(ok);


      bg.stop();


      dg.stop();
   }

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      bg.addConnector(live1);


      final InetAddress groupAddress2 = InetAddress.getByName(address2);
      final int port2 = getUDPDiscoveryPort(1);


      DiscoveryGroup dg = new DiscoveryGroupImpl(RandomUtil.randomString(),
                                                 RandomUtil.randomString(),
                                                 null,
                                                 groupAddress2,
                                                 port2,
                                                 timeout);


      dg.start();


      bg.broadcastConnectors();


      boolean ok = dg.waitForBroadcast(1000);


      Assert.assertFalse(ok);


      bg.stop();


      dg.stop();
   }

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      bg1.addConnector(live1);
      bg2.addConnector(live2);
      bg3.addConnector(live3);


      DiscoveryGroup dg1 = new DiscoveryGroupImpl("group-1::" + RandomUtil.randomString(),
                                                  "group-1::" + RandomUtil.randomString(),
                                                  null,
                                                  groupAddress1,
                                                  groupPort1,
                                                  timeout);
      dg1.start();


      DiscoveryGroup dg2 = new DiscoveryGroupImpl("group-2::" + RandomUtil.randomString(),
                                                  "group-2::" + RandomUtil.randomString(),
                                                  null,
                                                  groupAddress2,
                                                  groupPort2,
                                                  timeout);
      dg2.start();


      DiscoveryGroup dg3 = new DiscoveryGroupImpl("group-3::" + RandomUtil.randomString(),
                                                  "group-3::" + RandomUtil.randomString(),
                                                  null,
                                                  groupAddress3,
                                                  groupPort3,
                                                  timeout);
      dg3.start();


      bg1.broadcastConnectors();


      bg2.broadcastConnectors();


      bg3.broadcastConnectors();


      boolean ok = dg1.waitForBroadcast(timeout);
      Assert.assertTrue(ok);
      List<DiscoveryEntry> entries = dg1.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live1), entries);


      ok = dg2.waitForBroadcast(timeout);
      Assert.assertTrue(ok);
      entries = dg2.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live2), entries);


      ok = dg3.waitForBroadcast(timeout);
      Assert.assertTrue(ok);
      entries = dg3.getDiscoveryEntries();
      assertEqualsDiscoveryEntries(Arrays.asList(live3), entries);


      bg1.stop();
      bg2.stop();
      bg3.stop();


      dg1.stop();
      dg2.stop();
      dg3.stop();
   }

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