示例#1
0
        public void process(WatchedEvent e) {
          log.info(e.getPath());
          // System.out.println(e.getPath() + " " + e.toString());

          if (e.getState() == Watcher.Event.KeeperState.Expired) {

            handleExpired();
          } else if (e.getState() == Watcher.Event.KeeperState.Disconnected) {
            log.warn("ZKDisconnected! {}", e.toString());
          } else if (e.getState() == Watcher.Event.KeeperState.SyncConnected) {
            log.warn("ZKSyncConnected! {}", e.toString());
            ZKClient.this.handleSynConnected();
          }
        }
示例#2
0
 public synchronized void process(WatchedEvent event) {
   try {
     System.out.println("Got an event " + event.toString());
     events.put(event);
   } catch (InterruptedException e) {
     e.printStackTrace();
   }
 }
示例#3
0
  private void enode_test_2() throws IOException, InterruptedException, KeeperException {
    checkRoot();
    String parentName = testDirOnZK;
    String nodeName = parentName + "/enode_abc";
    ZooKeeper zk = new ZooKeeper(hostPort, 10000, this);
    ZooKeeper zk_1 = new ZooKeeper(hostPort, 10000, this);

    Stat stat = zk_1.exists(parentName, false);
    if (stat == null) {
      try {
        zk.create(parentName, null, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
      } catch (KeeperException ke) {
        fail("Creating node " + parentName + ke.getMessage());
      }
    }

    stat = zk_1.exists(nodeName, false);
    if (stat != null) {

      try {
        zk.delete(nodeName, -1);
      } catch (KeeperException ke) {
        int code = ke.getCode();
        boolean valid =
            code == KeeperException.Code.NoNode || code == KeeperException.Code.NotEmpty;
        if (!valid) {
          fail("Unexpected exception code for delete: " + ke.getMessage());
        }
      }
    }

    List<String> firstGen = zk_1.getChildren(parentName, true);

    try {
      zk.create(nodeName, null, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
    } catch (KeeperException ke) {
      int code = ke.getCode();
      boolean valid = code == KeeperException.Code.NodeExists;
      if (!valid) {
        fail("Unexpected exception code for createin: " + ke.getMessage());
      }
    }

    Thread.sleep(5000);
    WatchedEvent event = events.poll(10, TimeUnit.SECONDS);
    if (event == null) {
      throw new IOException("No event was delivered promptly");
    }
    if (event.getType() != EventType.NodeChildrenChanged
        || !event.getPath().equalsIgnoreCase(parentName)) {
      fail("Unexpected event was delivered: " + event.toString());
    }

    stat = zk_1.exists(nodeName, false);
    if (stat == null) {
      fail("node " + nodeName + " should exist");
    }

    try {
      zk.delete(parentName, -1);
      fail("Should be impossible to delete a non-empty node " + parentName);
    } catch (KeeperException ke) {
      int code = ke.getCode();
      boolean valid = code == KeeperException.Code.NotEmpty;
      if (!valid) {
        fail("Unexpected exception code for delete: " + code);
      }
    }

    try {
      zk.create(nodeName + "/def", null, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
      fail("Should be impossible to create child off Ephemeral node " + nodeName);
    } catch (KeeperException ke) {
      int code = ke.getCode();
      boolean valid = code == KeeperException.Code.NoChildrenForEphemerals;
      if (!valid) {
        fail("Unexpected exception code for createin: " + code);
      }
    }

    try {
      List<String> children = zk.getChildren(nodeName, false);
      if (children.size() > 0) {
        fail("ephemeral node " + nodeName + " should not have children");
      }
    } catch (KeeperException ke) {
      int code = ke.getCode();
      boolean valid = code == KeeperException.Code.NoNode;
      if (!valid) {
        fail("Unexpected exception code for createin: " + code);
      }
    }
    firstGen = zk_1.getChildren(parentName, true);
    stat = zk_1.exists(nodeName, true);
    if (stat == null) {
      fail("node " + nodeName + " should exist");
    }
    System.out.println("session id of zk: " + zk.getSessionId());
    System.out.println("session id of zk_1: " + zk_1.getSessionId());
    zk.close();

    stat = zk_1.exists("nosuchnode", false);

    event = this.getEvent(10);
    if (event == null) {
      throw new AssertionFailedError("First event was not delivered promptly");
    }
    if (!((event.getType() == EventType.NodeChildrenChanged
            && event.getPath().equalsIgnoreCase(parentName))
        || (event.getType() == EventType.NodeDeleted
            && event.getPath().equalsIgnoreCase(nodeName)))) {
      System.out.print(
          parentName
              + " "
              + EventType.NodeChildrenChanged
              + " "
              + nodeName
              + " "
              + EventType.NodeDeleted);
      fail("Unexpected first event was delivered: " + event.toString());
    }

    event = this.getEvent(10);

    if (event == null) {
      throw new AssertionFailedError("Second event was not delivered promptly");
    }
    if (!((event.getType() == EventType.NodeChildrenChanged
            && event.getPath().equalsIgnoreCase(parentName))
        || (event.getType() == EventType.NodeDeleted
            && event.getPath().equalsIgnoreCase(nodeName)))) {
      System.out.print(
          parentName
              + " "
              + EventType.NodeChildrenChanged
              + " "
              + nodeName
              + " "
              + EventType.NodeDeleted);
      fail("Unexpected second event was delivered: " + event.toString());
    }

    firstGen = zk_1.getChildren(parentName, false);
    stat = zk_1.exists(nodeName, false);
    if (stat != null) {
      fail("node " + nodeName + " should have been deleted");
    }
    if (firstGen.contains(nodeName)) {
      fail("node " + nodeName + " should not be a children");
    }
    deleteZKDir(zk_1, nodeName);
    zk_1.close();
  }
示例#4
0
 public void process(WatchedEvent event) {
   if (getPrintWatches()) {
     printMessage("WATCHER::");
     printMessage(event.toString());
   }
 }
示例#5
0
 @Override
 public void process(WatchedEvent event) {
   // nothing to do...
   LOG.info(event.toString());
 }
示例#6
0
  /**
   * Handles event from ZooKeeper for this coordinate.
   *
   * @param event
   */
  @Override
  public void process(WatchedEvent event) {
    LOG.info("Got an event from ZooKeeper " + event.toString());
    synchronized (lastStatusVersionMonitor) {
      switch (event.getType()) {
        case None:
          switch (event.getState()) {
            case SyncConnected:
              break;
            case Disconnected:
            case AuthFailed:
            case Expired:
            default:
              // If we lost connection, we don't attempt to register another watcher as
              // this might be blocking forever. Parent will try to reconnect (reclaim)
              // later.
              isSynchronizedWithZooKeeper.set(false);
              sendEventToCoordinateListener(
                  CoordinateListener.Event.NO_CONNECTION_TO_STORAGE, event.toString());

              return;
          }
          return;

        case NodeDeleted:
          // If node is deleted, we have no node to place a new watcher so we stop watching.
          isSynchronizedWithZooKeeper.set(false);
          sendEventToCoordinateListener(CoordinateListener.Event.NOT_OWNER, event.toString());
          return;

        case NodeDataChanged:
          LOG.fine("Node data changed, check versions.");
          boolean verifiedSynchronized = false;
          try {
            final Stat stat = zkClient.getZookeeper().exists(path, this);
            if (stat == null) {
              LOG.info("Could not stat path, setting out of synch, will retry claim");
            } else {
              LOG.fine("Previous version is " + lastStatusVersion + " now is " + stat.getVersion());
              if (stat.getVersion() != lastStatusVersion) {
                LOG.fine("Version mismatch, sending out of sync.");
              } else {
                verifiedSynchronized = true;
              }
            }
          } catch (KeeperException e) {
            LOG.fine(
                "Problems with zookeeper, sending consistencyState out of sync: " + e.getMessage());
          } catch (InterruptedException e) {
            LOG.fine("Got interrupted: " + e.getMessage());
            return;
          } finally {
            isSynchronizedWithZooKeeper.set(verifiedSynchronized);
          }

          if (verifiedSynchronized) {
            sendEventToCoordinateListener(
                CoordinateListener.Event.COORDINATE_OUT_OF_SYNC, event.toString());
          }
          return;

        case NodeChildrenChanged:
        case NodeCreated:
          // This should not happen..
          isSynchronizedWithZooKeeper.set(false);
          sendEventToCoordinateListener(
              CoordinateListener.Event.COORDINATE_OUT_OF_SYNC, event.toString());
          return;
      }
    }
  }
示例#7
0
 @Override
 public void process(WatchedEvent event) {
   System.out.println(event.toString());
 }