Package org.apache.zookeeper.data

Examples of org.apache.zookeeper.data.Stat

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   */
  boolean processRegionInTransition(final String encodedRegionName,
      final HRegionInfo regionInfo,
      final Map<ServerName,List<Pair<HRegionInfo,Result>>> deadServers)
  throws KeeperException, IOException {
    Stat stat = new Stat();
    RegionTransitionData data = ZKAssign.getDataAndWatch(watcher,
        encodedRegionName, stat);
    if (data == null) return false;
    HRegionInfo hri = regionInfo;
    if (hri == null) {
      if ((hri = getHRegionInfo(data)) == null) return false;
    }
    processRegionsInTransition(data, hri, deadServers, stat.getVersion());
    return true;
  }
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   */
  @Override
  public void nodeCreated(String path) {
    if(path.startsWith(watcher.assignmentZNode)) {
      try {
        Stat stat = new Stat();
        RegionTransitionData data = ZKAssign.getDataAndWatch(watcher, path, stat);
        if (data == null) {
          return;
        }
        handleRegion(data, stat.getVersion());
      } catch (KeeperException e) {
        master.abort("Unexpected ZK exception reading unassigned node data", e);
      }
    }
  }
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   */
  @Override
  public void nodeDataChanged(String path) {
    if(path.startsWith(watcher.assignmentZNode)) {
      try {
        Stat stat = new Stat();
        RegionTransitionData data = ZKAssign.getDataAndWatch(watcher, path, stat);
        if (data == null) {
          return;
        }
        handleRegion(data, stat.getVersion());
      } catch (KeeperException e) {
        master.abort("Unexpected ZK exception reading unassigned node data", e);
      }
    }
  }
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      } else {
        // If region is in offline and split state check the ZKNode
        if (regionInfo.isOffline() && regionInfo.isSplit()) {
          String node = ZKAssign.getNodeName(this.watcher, regionInfo
              .getEncodedName());
          Stat stat = new Stat();
          byte[] data = ZKUtil.getDataNoWatch(this.watcher, node, stat);
          // If znode does not exist dont consider this region
          if (data == null) {
            LOG.debug("Region "+ regionInfo.getRegionNameAsString() + " split is completed. "
                + "Hence need not add to regions list");
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    LOG.info("Region has been OPENING for too " + "long, reassigning region="
        + regionInfo.getRegionNameAsString());
    // Should have a ZK node in OPENING state
    try {
      String node = ZKAssign.getNodeName(watcher, regionInfo.getEncodedName());
      Stat stat = new Stat();
      RegionTransitionData dataInZNode = ZKAssign.getDataNoWatch(watcher, node,
          stat);
      if (dataInZNode == null) {
        LOG.warn("Data is null, node " + node + " no longer exists");
        return;
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  }

  private boolean ensureExists(final String znode) {
    ZooKeeper zk = wrapper.getZooKeeper();
    try {
      Stat stat = zk.exists(znode, false);
      if (stat != null) {
        return true;
      }
      zk.create(znode, new byte[0], Ids.OPEN_ACL_UNSAFE,
        CreateMode.PERSISTENT);
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  private boolean ensureExists(final String znode, final CreateMode mode,
      final byte[] data) {
    try {
      ZooKeeper zk = wrapper.getZooKeeper();
      Stat stat = zk.exists(znode, false);
      if (stat != null) {
        zk.setData(znode, data, -1);
        return true;
      }
      zk.create(znode, data, Ids.OPEN_ACL_UNSAFE, mode);
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    public RMStateVersion getCurrentVersion() throws Exception {
      return store.getCurrentVersion();
    }

    public boolean appExists(RMApp app) throws Exception {
      Stat node =
          client.exists(store.getAppNode(app.getApplicationId().toString()),
            false);
      return node !=null;
    }
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        EasyMock.expectLastCall().once();

        zk.exists(EasyMock.eq(node), EasyMock.eq(im), EasyMock.eq(im), EasyMock.anyObject());
        EasyMock.expectLastCall().once();

        EasyMock.expect(zk.exists(EasyMock.eq(node), EasyMock.eq(false))).andReturn(new Stat()).anyTimes();

        EasyMock.expect(zk.getChildren(EasyMock.eq(node), EasyMock.eq(im))).andReturn(Collections.EMPTY_LIST)
            .once();

        c.replay();
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    if (!secureZKAvailable) {
      return;
    }

    List<ACL> acls = zkw.getRecoverableZooKeeper().getZooKeeper()
        .getACL("/hbase", new Stat());
    assertEquals(acls.size(),1);
    assertEquals(acls.get(0).getId().getScheme(),"sasl");
    assertEquals(acls.get(0).getId().getId(),"hbase");
    assertEquals(acls.get(0).getPerms(), ZooDefs.Perms.ALL);
  }
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