Examples of com.linkedin.databus.groupleader.pub.GroupLeadershipConnection

Package com.linkedin.databus.groupleader.pub

Examples of com.linkedin.databus.groupleader.pub.GroupLeadershipConnection

com.linkedin.databus.groupleader.pub.GroupLeadershipConnection
A {@code group} is made up of {@code member}s. The group has a unique name, and each member of a group has a name that is unique within the group.
A {@link GroupLeadershipConnection} is used to interact with the group management service.A {@link GroupLeadershipSession} represents the membership of a member within a group. @author Mitch Stuart @version $Revision: 269419 $

      return getGroupLeadershipConnection().getLeaderName(getBasePathName(),getGroupName());
    }


    public String getLeaderZkName()
    {
      GroupLeadershipConnection conn = getGroupLeadershipConnection();
      if (conn instanceof GroupLeadershipConnectionZkClientImpl)
      {
        return ((GroupLeadershipConnectionZkClientImpl) conn).getLeaderZkName(getBasePathName(),getGroupName());
      }
      return null;

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   */
  @Override
  public GroupLeadershipConnection getConnection()
  {
    ZkClient zkClient = new ZkClient(_zkServerList, _sessionTimeoutMillis, _connectTimeoutMillis);
    GroupLeadershipConnection groupLeadershipConnection = new GroupLeadershipConnectionZkClientImpl(zkClient);
    return groupLeadershipConnection;
  }

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          {
            callerMaintainedCurrentLeaderRef.set(groupLeadershipSession.getMemberName());
          }
        };


        GroupLeadershipConnection conn002 = _groupLeadershipConnFactory.getConnection();
        Assert.assertNull(conn002.getLeaderName(baseName,groupName),"Leader should be null");
        LOG.info("Group should not exist yet Test");
        assertFalse(conn002.getGroupNames(baseName).contains(groupName));


        GroupLeadershipSession sess002 = conn002.joinGroup(baseName,
            groupName, "002", saveCurrentLeaderCallback);


        assertEquals(groupName, sess002.getGroupName());
        assertEquals("002", sess002.getMemberName());
        assertEquals("002", (sess002.getLeaderName()));
        LOG.info("002 should be leader Test");
        assertFalse( ! sess002.isLeader());
        assertEquals("002", callerMaintainedCurrentLeaderRef.get());
        LOG.info("Group should exist Test");
        assertFalse(! conn002.getGroupNames(baseName).contains(groupName));
        assertEquals(groupName, conn002.getGroupLeadershipInfo(baseName,groupName).getGroupName());
        assertEquals("002", (conn002.getGroupLeadershipInfo(baseName,groupName).getLeaderName()));
        assertEquals(1, conn002.getGroupLeadershipInfo(baseName,groupName).getMemberNames().size());
        System.err.printf("membership info=%s\n", conn002.getGroupLeadershipInfo(baseName, groupName).getMemberNames());
        LOG.info("Member should be in group Test");
        assertFalse(!conn002.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("002"));






        GroupLeadershipConnection conn001 = _groupLeadershipConnFactory.getConnection();


        GroupLeadershipSession sess001 = conn001.joinGroup(baseName,
            groupName, "001", saveCurrentLeaderCallback);


        assertEquals(groupName, sess001.getGroupName());
        assertEquals("001", sess001.getMemberName());
        assertEquals("002", (sess001.getLeaderName()));
        LOG.info("001 should not be leader");
        assertFalse(sess001.isLeader());
        assertEquals("002", callerMaintainedCurrentLeaderRef.get());


        LOG.info("Group should exist");
        assertFalse(! conn001.getGroupNames(baseName).contains(groupName));
        assertEquals(groupName, conn001.getGroupLeadershipInfo(baseName,groupName).getGroupName());
        assertEquals("002", (conn001.getGroupLeadershipInfo(baseName,groupName).getLeaderName()));
        assertEquals(2, conn001.getGroupLeadershipInfo(baseName,groupName).getMemberNames().size());
        LOG.info("Member should be in group");
        assertFalse(! conn001.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("001"));
        LOG.info("Member should be in group");
        assertFalse(!conn001.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("002"));






        GroupLeadershipConnection conn003 = _groupLeadershipConnFactory.getConnection();


        GroupLeadershipSession sess003 = conn003.joinGroup(baseName,
            groupName, "003", saveCurrentLeaderCallback);


        assertEquals(groupName, sess003.getGroupName());
        assertEquals("003", sess003.getMemberName());
        assertEquals("002", (sess003.getLeaderName()));
        LOG.info("003 should not be leader");
        assertFalse( sess003.isLeader());
        assertEquals("002", callerMaintainedCurrentLeaderRef.get());


        LOG.info("Group should exist");
        assertTrue(conn003.getGroupNames(baseName).contains(groupName));
        assertEquals(groupName, conn003.getGroupLeadershipInfo(baseName,groupName).getGroupName());
        assertEquals("002", (conn003.getGroupLeadershipInfo(baseName,groupName).getLeaderName()));
        assertEquals(3, conn003.getGroupLeadershipInfo(baseName,groupName).getMemberNames().size());
        LOG.info("Member should be in group");
        assertTrue(conn003.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("001"));
        assertTrue(conn003.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("002"));
        assertTrue(conn003.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("003"));


        sess002.leaveGroup();


        for (int i = 0; i < 60; i++)
        {


          if ("001".equals((_adminLeadershipConn.getGroupLeadershipInfo(baseName,groupName).getLeaderName())))
          {
            break;
          }
          Thread.sleep(500);
        }


        assertEquals(groupName, sess001.getGroupName());
        assertEquals("001", sess001.getMemberName());
        assertEquals("001", (sess001.getLeaderName()));
        LOG.info("001 should be leader");
        assertTrue(sess001.isLeader());
        assertEquals("001", callerMaintainedCurrentLeaderRef.get());


        LOG.info("Group should exist");
        assertTrue(_adminLeadershipConn.getGroupNames(baseName).contains(groupName));
        assertEquals(groupName, _adminLeadershipConn.getGroupLeadershipInfo(baseName,groupName).getGroupName());
        assertEquals("001",(_adminLeadershipConn.getGroupLeadershipInfo(baseName,groupName).getLeaderName()));
        assertEquals(2, _adminLeadershipConn.getGroupLeadershipInfo(baseName,groupName).getMemberNames().size());
        LOG.info("Member should be in group");
        assertTrue(_adminLeadershipConn.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("001"));
        assertTrue(_adminLeadershipConn.getGroupLeadershipInfo(baseName,groupName).getMemberNames().contains("003"));


        assertEquals(groupName, sess003.getGroupName());
        assertEquals("003", sess003.getMemberName());
        assertEquals("001", sess003.getLeaderName());
        LOG.info("003 should not be leader");
        assertFalse(sess003.isLeader());


        try
        {
          sess002.leaveGroup();
          fail("Should have gotten IllegalStateException");
        }
        catch (IllegalStateException e)
        {
          // expected
        }


        sess003.leaveGroup();
        sess001.leaveGroup();
        conn003.close();
        conn002.close();
        conn001.close();
      } finally {
        tearDown();
      }

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Related Classes of com.linkedin.databus.groupleader.pub.GroupLeadershipConnection

com.linkedin.databus.groupleader.impl.zkclient.GroupLeadershipConnectionFactoryZkClientImpl

com.linkedin.databus.groupleader.impl.zkclient.GroupLeadershipConnectionZkClientImpl$GroupLeadershipSessionZkClientImpl

com.linkedin.databus.groupleader.impl.zkclient.TestLeaderElect

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