Package org.apache.helix

Examples of org.apache.helix.ZNRecord

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                                     clusterName,
                                     "localhost_8901",
                                     "session_1",
                                     "TestDB" + i);
      boolean success =
          accessor.create(path, new ZNRecord("TestDB" + i), AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in create: " + path);
    }
   
    // create same 10 current states again, should fail
    for (int i = 0; i < 10; i++)
    {
      String path =
          PropertyPathConfig.getPath(PropertyType.CURRENTSTATES,
                                     clusterName,
                                     "localhost_8901",
                                     "session_1",
                                     "TestDB" + i);
      boolean success =
          accessor.create(path, new ZNRecord("TestDB" + i), AccessOption.PERSISTENT);
      Assert.assertFalse(success, "Should fail in create due to NodeExists: " + path);
    }

    System.out.println("END " + clusterName + " at "
        + new Date(System.currentTimeMillis()));
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    List<ZNRecord> childRecords = new ArrayList<ZNRecord>();
    for (String child : children)
    {
      String childPath = path + "/" + child;
      Stat newStat = new Stat();
      ZNRecord record = client.readDataAndStat(childPath, newStat, true);
      if (record != null)
      {
        record.setVersion(newStat.getVersion());
        record.setCreationTime(newStat.getCtime());
        record.setModifiedTime(newStat.getMtime());
        childRecords.add(record);
      }
    }
    return childRecords;
  }
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        else
        {
          CreateMode mode = (persistent) ? CreateMode.PERSISTENT : CreateMode.EPHEMERAL;
          if (record.getDeltaList().size() > 0)
          {
            ZNRecord value = new ZNRecord(record.getId());
            value.merge(record);
            client.create(path, value, mode);
          }
          else
          {
            client.create(path, record, mode);
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    {
      if (client.exists(path))
      {
        if (mergeOnUpdate)
        {
          ZNRecord curRecord = client.readData(path);
          if (curRecord != null)
          {
            curRecord.merge(record);
            client.asyncSetData(path, curRecord, -1, null);
          }
          else
          {
            client.asyncSetData(path, record, -1, null);
          }
        }
        else
        {
          client.asyncSetData(path, record, -1, null);
        }
      }
      else
      {
        CreateMode mode = (persistent) ? CreateMode.PERSISTENT : CreateMode.EPHEMERAL;
        if (record.getDeltaList().size() > 0)
        {
          ZNRecord newRecord = new ZNRecord(record.getId());
          newRecord.merge(record);
          client.create(path, null, mode);

          client.asyncSetData(path, newRecord, -1, null);
        }
        else
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    // test sync create
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      boolean success = accessor.create(path, new ZNRecord(msgId), AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in create");
    }

    // test get what we created
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getId(), msgId, "Should get what we created");
    }

    // test sync set
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key1", "value1");
      boolean success = accessor.set(path, newRecord, AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in set");
    }

    // test get what we set
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 1, "Should have 1 simple field set");
      Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
    }
   
    // test sync update
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key2", "value2");
      boolean success = accessor.update(path, new ZNRecordUpdater(newRecord), AccessOption.PERSISTENT);
      Assert.assertTrue(success, "Should succeed in update");
    }

    // test get what we updated
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }
   
    // test sync get
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_0", msgId);
      ZNRecord record = accessor.get(path, null, 0);
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }

    // test sync exist
    for (int i = 0; i < 10; i++)
    {
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    List<String> paths = new  ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1",msgId));
      records.add(new ZNRecord(msgId));
    }
    boolean[] success = accessor.createChildren(paths, records, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in create " + msgId);
    }

    // test get what we created
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getId(), msgId, "Should get what we created");
    }

    // test async setChildren
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    records = new ArrayList<ZNRecord>();
    paths = new  ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1",msgId));
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key1", "value1");
      records.add(newRecord);
    }
    success = accessor.setChildren(paths, records, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in set " + msgId);
    }

    // test get what we set
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 1, "Should have 1 simple field set");
      Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
    }
   
    // test async updateChildren
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
//    records = new ArrayList<ZNRecord>();
    List<DataUpdater<ZNRecord>> znrecordUpdaters = new ArrayList<DataUpdater<ZNRecord>>();
    paths = new ArrayList<String>();
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1",msgId));
      ZNRecord newRecord = new ZNRecord(msgId);
      newRecord.setSimpleField("key2", "value2");
//      records.add(newRecord);
      znrecordUpdaters.add(new ZNRecordUpdater(newRecord));
    }
    success = accessor.updateChildren(paths, znrecordUpdaters, AccessOption.PERSISTENT);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      Assert.assertTrue(success[i], "Should succeed in update " + msgId);
    }

    // test get what we updated
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
      ZNRecord record = zkClient.readData(path);
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }

    // test async getChildren
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    records = accessor.getChildren(parentPath, null, 0);
    for (int i = 0; i < 10; i++)
    {
      String msgId = "msg_" + i;
      ZNRecord record = records.get(i);
      Assert.assertEquals(record.getId(), msgId, "Should get what we updated");
      Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
      Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
    }

    // test async exists
    parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
    paths = new ArrayList<String>();
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    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 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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   * to last state
   */

  public ZNRecord generateConfigForStorageSchemata()
  {
    ZNRecord record = new ZNRecord("STORAGE_DEFAULT_SM_SCHEMATA");
    record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(),
                          "OFFLINE");
    List<String> statePriorityList = new ArrayList<String>();
    statePriorityList.add("MASTER");
    statePriorityList.add("OFFLINE");
    statePriorityList.add("DROPPED");
    statePriorityList.add("ERROR");
    record.setListField(StateModelDefinitionProperty.STATE_PRIORITY_LIST.toString(),
                        statePriorityList);
    for (String state : statePriorityList)
    {
      String key = state + ".meta";
      Map<String, String> metadata = new HashMap<String, String>();
      if (state.equals("MASTER"))
      {
        metadata.put("count", "N");
        record.setMapField(key, metadata);
      }
      else if (state.equals("OFFLINE"))
      {
        metadata.put("count", "-1");
        record.setMapField(key, metadata);
      }
      else if (state.equals("DROPPED"))
      {
        metadata.put("count", "-1");
        record.setMapField(key, metadata);
      }
      else if (state.equals("ERROR"))
      {
        metadata.put("count", "-1");
        record.setMapField(key, metadata);
      }
    }
    for (String state : statePriorityList)
    {
      String key = state + ".next";
      if (state.equals("MASTER"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("OFFLINE", "OFFLINE");
        metadata.put("DROPPED", "OFFLINE");
        record.setMapField(key, metadata);
      }
      if (state.equals("OFFLINE"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("MASTER", "MASTER");
        metadata.put("DROPPED", "DROPPED");
        record.setMapField(key, metadata);
      }
      if (state.equals("ERROR"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("OFFLINE", "OFFLINE");
        record.setMapField(key, metadata);
      }
    }
    List<String> stateTransitionPriorityList = new ArrayList<String>();
    stateTransitionPriorityList.add("MASTER-OFFLINE");
    stateTransitionPriorityList.add("OFFLINE-MASTER");
    record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(),
                        stateTransitionPriorityList);
    return record;
  }
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    return record;
  }

  public ZNRecord generateConfigForMasterSlave()
  {
    ZNRecord record = new ZNRecord("MasterSlave");
    record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(),
                          "OFFLINE");
    List<String> statePriorityList = new ArrayList<String>();
    statePriorityList.add("MASTER");
    statePriorityList.add("SLAVE");
    statePriorityList.add("OFFLINE");
    statePriorityList.add("DROPPED");
    statePriorityList.add("ERROR");
    record.setListField(StateModelDefinitionProperty.STATE_PRIORITY_LIST.toString(),
                        statePriorityList);
    for (String state : statePriorityList)
    {
      String key = state + ".meta";
      Map<String, String> metadata = new HashMap<String, String>();
      if (state.equals("MASTER"))
      {
        metadata.put("count", "1");
        record.setMapField(key, metadata);
      }
      else if (state.equals("SLAVE"))
      {
        metadata.put("count", "R");
        record.setMapField(key, metadata);
      }
      else if (state.equals("OFFLINE"))
      {
        metadata.put("count", "-1");
        record.setMapField(key, metadata);
      }
      else if (state.equals("DROPPED"))
      {
        metadata.put("count", "-1");
        record.setMapField(key, metadata);
      }
      else if (state.equals("ERROR"))
      {
        metadata.put("count", "-1");
        record.setMapField(key, metadata);
      }
    }
    for (String state : statePriorityList)
    {
      String key = state + ".next";
      if (state.equals("MASTER"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("SLAVE", "SLAVE");
        metadata.put("OFFLINE", "SLAVE");
        metadata.put("DROPPED", "SLAVE");
        record.setMapField(key, metadata);
      }
      else if (state.equals("SLAVE"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("MASTER", "MASTER");
        metadata.put("OFFLINE", "OFFLINE");
        metadata.put("DROPPED", "OFFLINE");
        record.setMapField(key, metadata);
      }
      else if (state.equals("OFFLINE"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("SLAVE", "SLAVE");
        metadata.put("MASTER", "SLAVE");
        metadata.put("DROPPED", "DROPPED");
        record.setMapField(key, metadata);
      }
      else if (state.equals("ERROR"))
      {
        Map<String, String> metadata = new HashMap<String, String>();
        metadata.put("OFFLINE", "OFFLINE");
        record.setMapField(key, metadata);
      }
    }
    List<String> stateTransitionPriorityList = new ArrayList<String>();
    stateTransitionPriorityList.add("MASTER-SLAVE");
    stateTransitionPriorityList.add("SLAVE-MASTER");
    stateTransitionPriorityList.add("OFFLINE-SLAVE");
    stateTransitionPriorityList.add("SLAVE-OFFLINE");
    stateTransitionPriorityList.add("OFFLINE-DROPPED");
    record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(),
                        stateTransitionPriorityList);
    return record;
    // ZNRecordSerializer serializer = new ZNRecordSerializer();
    // System.out.println(new String(serializer.serialize(record)));
  }
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