Package org.apache.helix.manager.zk

Examples of org.apache.helix.manager.zk.ZkClient

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  {
//    Logger.getRootLogger().setLevel(Level.INFO);
    System.out.println("START " + CLASS_NAME + " at "
        + new Date(System.currentTimeMillis()));

    _zkClient = new ZkClient(ZK_ADDR);
    _zkClient.setZkSerializer(new ZNRecordSerializer());
    String namespace = "/" + CLUSTER_NAME;
    if (_zkClient.exists(namespace))
    {
      _zkClient.deleteRecursive(namespace);
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  // throws Exception
  public static void setupCluster(String uniqClusterName, String zkAddr, int numResources,
      int numPartitionsPerResource, int numInstances, int replica, boolean doRebalance)
      throws Exception
  {
    ZkClient zkClient = new ZkClient(zkAddr);
    zkClient.setZkSerializer(new ZNRecordSerializer());

    // String clusterName = CLUSTER_PREFIX + "_" + uniqClusterName;
    String clusterName = uniqClusterName;
    if (zkClient.exists("/" + clusterName))
    {
      LOG.warn("test cluster already exists:" + clusterName + ", test name:" + uniqClusterName
          + " is not unique or test has been run without cleaning up zk; deleting it");
      zkClient.deleteRecursive("/" + clusterName);
    }

    if (_testInfoMap.containsKey(uniqClusterName))
    {
      LOG.warn("test info already exists:" + uniqClusterName
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  public void beforeClass() throws Exception
  {
    System.out.println("START " + CLASS_NAME + " at "
        + new Date(System.currentTimeMillis()));

    _zkClient = new ZkClient(ZK_ADDR);
    _zkClient.setZkSerializer(new ZNRecordSerializer());
    String namespace = "/" + CLUSTER_NAME;
    if (_zkClient.exists(namespace))
    {
      _zkClient.deleteRecursive(namespace);
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    String testName = "TestZKClientPool";
    System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));

    String zkAddr = "localhost:2187";
    ZkServer zkServer = TestHelper.startZkSever(zkAddr);
    ZkClient zkClient = ZKClientPool.getZkClient(zkAddr);
   
    zkClient.createPersistent("/" + testName, new ZNRecord(testName));
    ZNRecord record = zkClient.readData("/" + testName);
    Assert.assertEquals(record.getId(), testName);
   
    TestHelper.stopZkServer(zkServer);
   
    // restart zk
    zkServer = TestHelper.startZkSever(zkAddr);
    try
    {
      zkClient = ZKClientPool.getZkClient(zkAddr);
      record = zkClient.readData("/" + testName);
      Assert.fail("should fail on zk no node exception");
    } catch (ZkNoNodeException e)
    {
      // OK
    } catch (Exception e)
    {
      Assert.fail("should not fail on exception other than ZkNoNodeException");
    }
   
    zkClient.createPersistent("/" + testName, new ZNRecord(testName));
    record = zkClient.readData("/" + testName);
    Assert.assertEquals(record.getId(), testName);
   
    zkClient.close();
    TestHelper.stopZkServer(zkServer);
    System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));
  }
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  }

  public static boolean verifyByZkCallback(ZkVerifier verifier, long timeout) {
    long startTime = System.currentTimeMillis();
    CountDownLatch countDown = new CountDownLatch(1);
    ZkClient zkClient = verifier.getZkClient();
    String clusterName = verifier.getClusterName();

    // add an ephemeral node to /{clusterName}/CONFIGS/CLUSTER/verify
    // so when analyze zk log, we know when a test ends
    zkClient.createEphemeral("/" + clusterName + "/CONFIGS/CLUSTER/verify");

    ExtViewVeriferZkListener listener = new ExtViewVeriferZkListener(countDown, zkClient, verifier);

    String extViewPath = PropertyPathConfig.getPath(PropertyType.EXTERNALVIEW, clusterName);
    zkClient.subscribeChildChanges(extViewPath, listener);
    for (String child : zkClient.getChildren(extViewPath)) {
      String childPath = extViewPath.equals("/") ? extViewPath + child : extViewPath + "/" + child;
      zkClient.subscribeDataChanges(childPath, listener);
    }

    // do initial verify
    boolean result = verifier.verify();
    if (result == false) {
      try {
        result = countDown.await(timeout, TimeUnit.MILLISECONDS);
        if (result == false) {
          // make a final try if timeout
          result = verifier.verify();
        }
      } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }

    // clean up
    zkClient.unsubscribeChildChanges(extViewPath, listener);
    for (String child : zkClient.getChildren(extViewPath)) {
      String childPath = extViewPath.equals("/") ? extViewPath + child : extViewPath + "/" + child;
      zkClient.unsubscribeDataChanges(childPath, listener);
    }

    long endTime = System.currentTimeMillis();

    zkClient.delete("/" + clusterName + "/CONFIGS/CLUSTER/verify");
    // debug
    System.err.println(result + ": wait " + (endTime - startTime) + "ms, " + verifier);

    return result;
  }
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    AssertJUnit.assertTrue(_zkServer != null);

    // System.out.println("Number of open zkClient before ZkUnitTests: "
    // + ZkClient.getNumberOfConnections());

    _gZkClient = new ZkClient(ZK_ADDR);
    _gZkClient.setZkSerializer(new ZNRecordSerializer());
  }
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    String methodName = TestHelper.getTestMethodName();
    String clusterName = className + "_" + methodName;
    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));

    // init external base data accessor
    ZkClient extZkclient = new ZkClient(ZK_ADDR);
    extZkclient.setZkSerializer(new ZNRecordSerializer());
    ZkBaseDataAccessor<ZNRecord> extBaseAccessor = new ZkBaseDataAccessor<ZNRecord>(extZkclient);

    // init zkCacheBaseDataAccessor
    String curStatePath =
        PropertyPathConfig.getPath(PropertyType.CURRENTSTATES, clusterName, "localhost_8901");
    String extViewPath = PropertyPathConfig.getPath(PropertyType.EXTERNALVIEW, clusterName);

    ZkBaseDataAccessor<ZNRecord> baseAccessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);

    extBaseAccessor.create(curStatePath, null, AccessOption.PERSISTENT);

    List<String> zkCacheInitPaths = Arrays.asList(curStatePath, extViewPath);
    ZkCacheBaseDataAccessor<ZNRecord> accessor =
        new ZkCacheBaseDataAccessor<ZNRecord>(baseAccessor, null, null, zkCacheInitPaths);

    // TestHelper.printCache(accessor._zkCache);
    boolean ret =
        TestHelper.verifyZkCache(zkCacheInitPaths, accessor._zkCache._cache, _gZkClient, true);
    Assert.assertTrue(ret, "zkCache doesn't match data on Zk");

    // create 10 current states using external base accessor
    List<String> paths = new ArrayList<String>();
    List<ZNRecord> records = new ArrayList<ZNRecord>();
    for (int i = 0; i < 10; i++) {
      String path =
          PropertyPathConfig.getPath(PropertyType.CURRENTSTATES, clusterName, "localhost_8901",
              "session_0", "TestDB" + i);
      ZNRecord record = new ZNRecord("TestDB" + i);

      paths.add(path);
      records.add(record);
    }

    boolean[] success = extBaseAccessor.createChildren(paths, records, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++) {
      Assert.assertTrue(success[i], "Should succeed in create: " + paths.get(i));
    }

    // wait zkEventThread update zkCache
    // verify wtCache
    for (int i = 0; i < 10; i++) {
      // TestHelper.printCache(accessor._zkCache);
      ret = TestHelper.verifyZkCache(zkCacheInitPaths, accessor._zkCache._cache, _gZkClient, true);
      if (ret == true)
        break;
      Thread.sleep(100);
    }

    // System.out.println("ret: " + ret);
    Assert.assertTrue(ret, "zkCache doesn't match data on Zk");

    // update each current state 10 times by external base accessor
    List<DataUpdater<ZNRecord>> updaters = new ArrayList<DataUpdater<ZNRecord>>();
    for (int j = 0; j < 10; j++) {
      paths.clear();
      updaters.clear();
      for (int i = 0; i < 10; i++) {
        String path = curStatePath + "/session_0/TestDB" + i;
        ZNRecord newRecord = new ZNRecord("TestDB" + i);
        newRecord.setSimpleField("" + j, "" + j);
        DataUpdater<ZNRecord> updater = new ZNRecordUpdater(newRecord);
        paths.add(path);
        updaters.add(updater);
      }
      success = extBaseAccessor.updateChildren(paths, updaters, AccessOption.PERSISTENT);

      for (int i = 0; i < 10; i++) {
        Assert.assertTrue(success[i], "Should succeed in update: " + paths.get(i));
      }
    }

    // wait zkEventThread update zkCache
    Thread.sleep(100);

    // verify cache
    // TestHelper.printCache(accessor._zkCache);
    ret = TestHelper.verifyZkCache(zkCacheInitPaths, accessor._zkCache._cache, _gZkClient, true);
    Assert.assertTrue(ret, "zkCache doesn't match data on Zk");

    // set 10 external views by external accessor
    paths.clear();
    records.clear();
    for (int i = 0; i < 10; i++) {
      String path =
          PropertyPathConfig.getPath(PropertyType.EXTERNALVIEW, clusterName, "TestDB" + i);
      ZNRecord record = new ZNRecord("TestDB" + i);

      paths.add(path);
      records.add(record);
    }
    success = extBaseAccessor.setChildren(paths, records, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++) {
      Assert.assertTrue(success[i], "Should succeed in set: " + paths.get(i));
    }

    // wait zkEventThread update zkCache
    Thread.sleep(100);

    // verify cache
    // TestHelper.printCache(accessor._zkCache._cache);
    ret = TestHelper.verifyZkCache(zkCacheInitPaths, accessor._zkCache._cache, _gZkClient, true);
    Assert.assertTrue(ret, "zkCache doesn't match data on Zk");

    // remove 10 external views by external accessor
    paths.clear();
    for (int i = 0; i < 10; i++) {
      String path =
          PropertyPathConfig.getPath(PropertyType.EXTERNALVIEW, clusterName, "TestDB" + i);

      paths.add(path);
    }
    success = extBaseAccessor.remove(paths, 0);
    for (int i = 0; i < 10; i++) {
      Assert.assertTrue(success[i], "Should succeed in remove: " + paths.get(i));
    }

    // wait zkEventThread update zkCache
    Thread.sleep(100);

    // verify cache
    // TestHelper.printCache(accessor._zkCache._cache);
    ret = TestHelper.verifyZkCache(zkCacheInitPaths, accessor._zkCache._cache, _gZkClient, true);
    Assert.assertTrue(ret, "zkCache doesn't match data on Zk");

    // clean up
    extZkclient.close();
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));

  }
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    String className = getShortClassName();
    System.out.println("START testZNRecordSizeLimitUseZNRecordSerializer at "
        + new Date(System.currentTimeMillis()));

    ZNRecordSerializer serializer = new ZNRecordSerializer();
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(serializer);
    String root = className;
    byte[] buf = new byte[1024];
    for (int i = 0; i < 1024; i++) {
      buf[i] = 'a';
    }
    String bufStr = new String(buf);

    // test zkClient
    // legal-sized data gets written to zk
    // write a znode of size less than 1m
    final ZNRecord smallRecord = new ZNRecord("normalsize");
    smallRecord.getSimpleFields().clear();
    for (int i = 0; i < 900; i++) {
      smallRecord.setSimpleField(i + "", bufStr);
    }

    String path1 = "/" + root + "/test1";
    zkClient.createPersistent(path1, true);
    zkClient.writeData(path1, smallRecord);

    ZNRecord record = zkClient.readData(path1);
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);

    // oversized data doesn't create any data on zk
    // prepare a znode of size larger than 1m
    final ZNRecord largeRecord = new ZNRecord("oversize");
    largeRecord.getSimpleFields().clear();
    for (int i = 0; i < 1024; i++) {
      largeRecord.setSimpleField(i + "", bufStr);
    }
    String path2 = "/" + root + "/test2";
    zkClient.createPersistent(path2, true);
    try {
      zkClient.writeData(path2, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    } catch (HelixException e) {
      // OK
    }
    record = zkClient.readData(path2);
    Assert.assertNull(record);

    // oversized write doesn't overwrite existing data on zk
    record = zkClient.readData(path1);
    try {
      zkClient.writeData(path1, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    } catch (HelixException e) {
      // OK
    }
    ZNRecord recordNew = zkClient.readData(path1);
    byte[] arr = serializer.serialize(record);
    byte[] arrNew = serializer.serialize(recordNew);
    Assert.assertTrue(Arrays.equals(arr, arrNew));

    // test ZkDataAccessor
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    String className = getShortClassName();
    System.out.println("START testZNRecordSizeLimitUseZNRecordStreamingSerializer at "
        + new Date(System.currentTimeMillis()));

    ZNRecordStreamingSerializer serializer = new ZNRecordStreamingSerializer();
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(serializer);
    String root = className;
    byte[] buf = new byte[1024];
    for (int i = 0; i < 1024; i++) {
      buf[i] = 'a';
    }
    String bufStr = new String(buf);

    // test zkClient
    // legal-sized data gets written to zk
    // write a znode of size less than 1m
    final ZNRecord smallRecord = new ZNRecord("normalsize");
    smallRecord.getSimpleFields().clear();
    for (int i = 0; i < 900; i++) {
      smallRecord.setSimpleField(i + "", bufStr);
    }

    String path1 = "/" + root + "/test1";
    zkClient.createPersistent(path1, true);
    zkClient.writeData(path1, smallRecord);

    ZNRecord record = zkClient.readData(path1);
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);

    // oversized data doesn't create any data on zk
    // prepare a znode of size larger than 1m
    final ZNRecord largeRecord = new ZNRecord("oversize");
    largeRecord.getSimpleFields().clear();
    for (int i = 0; i < 1024; i++) {
      largeRecord.setSimpleField(i + "", bufStr);
    }
    String path2 = "/" + root + "/test2";
    zkClient.createPersistent(path2, true);
    try {
      zkClient.writeData(path2, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    } catch (HelixException e) {
      // OK
    }
    record = zkClient.readData(path2);
    Assert.assertNull(record);

    // oversized write doesn't overwrite existing data on zk
    record = zkClient.readData(path1);
    try {
      zkClient.writeData(path1, largeRecord);
      Assert.fail("Should fail because data size is larger than 1M");
    } catch (HelixException e) {
      // OK
    }
    ZNRecord recordNew = zkClient.readData(path1);
    byte[] arr = serializer.serialize(record);
    byte[] arrNew = serializer.serialize(recordNew);
    Assert.assertTrue(Arrays.equals(arr, arrNew));

    // test ZkDataAccessor
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  }

  @BeforeClass()
  public void beforeClass() throws Exception {
    ZkClient zkClient = null;
    try {
      zkClient = new ZkClient(ZK_ADDR);
      zkClient.setZkSerializer(new ZNRecordSerializer());
      if (zkClient.exists("/" + clusterName)) {
        zkClient.deleteRecursive("/" + clusterName);
      }
    } finally {
      if (zkClient != null) {
        zkClient.close();
      }
    }

    ClusterSetup.processCommandLineArgs(getArgs("-zkSvr", ZK_ADDR, "-addCluster", clusterName));
    ClusterSetup.processCommandLineArgs(getArgs("-zkSvr", ZK_ADDR, "-addNode", clusterName,
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