| package org.apache.helix.integration.manager; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.helix.HelixManagerProperty; |
| import org.apache.helix.InstanceType; |
| import org.apache.helix.manager.zk.CallbackHandler; |
| import org.apache.helix.manager.zk.HelixManagerStateListener; |
| import org.apache.helix.manager.zk.ZKHelixManager; |
| import org.apache.helix.zookeeper.api.client.RealmAwareZkClient; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class ClusterManager extends ZKHelixManager implements Runnable, ZkTestManager { |
| private static Logger LOG = LoggerFactory.getLogger(ClusterControllerManager.class); |
| private static final int DISCONNECT_WAIT_TIME_MS = 3000; |
| |
| private static AtomicLong UID = new AtomicLong(10000); |
| private long _uid; |
| |
| private final String _clusterName; |
| private final String _instanceName; |
| private final InstanceType _type; |
| |
| protected CountDownLatch _startCountDown = new CountDownLatch(1); |
| protected CountDownLatch _stopCountDown = new CountDownLatch(1); |
| protected CountDownLatch _waitStopFinishCountDown = new CountDownLatch(1); |
| |
| protected boolean _started = false; |
| |
| protected Thread _watcher; |
| |
| protected ClusterManager(String zkAddr, String clusterName, String instanceName, |
| InstanceType type) { |
| super(clusterName, instanceName, type, zkAddr); |
| _clusterName = clusterName; |
| _instanceName = instanceName; |
| _type = type; |
| _uid = UID.getAndIncrement(); |
| } |
| protected ClusterManager(String clusterName, String instanceName, InstanceType instanceType, |
| String zkAddress, HelixManagerStateListener stateListener, |
| HelixManagerProperty helixManagerProperty) { |
| super(clusterName, instanceName, instanceType, zkAddress, stateListener, helixManagerProperty); |
| _clusterName = clusterName; |
| _instanceName = instanceName; |
| _type = instanceType; |
| _uid = UID.getAndIncrement(); |
| } |
| |
| public void syncStop() { |
| _stopCountDown.countDown(); |
| try { |
| _waitStopFinishCountDown.await(); |
| _started = false; |
| } catch (InterruptedException e) { |
| LOG.error("Interrupted waiting for finish", e); |
| } |
| } |
| |
| // This should not be called more than once because HelixManager.connect() should not be called more than once. |
| public void syncStart() { |
| if (_started) { |
| throw new RuntimeException( |
| "Helix Controller already started. Do not call syncStart() more than once."); |
| } else { |
| _started = true; |
| } |
| |
| _watcher = new Thread(this); |
| _watcher.setName(String |
| .format("ClusterManager_Watcher_%s_%s_%s_%d", _clusterName, _instanceName, _type.name(), _uid)); |
| LOG.debug("ClusterManager_watcher_{}_{}_{}_{} started, stacktrace {}", _clusterName, _instanceName, _type.name(), _uid, Thread.currentThread().getStackTrace()); |
| _watcher.start(); |
| |
| try { |
| _startCountDown.await(); |
| } catch (InterruptedException e) { |
| LOG.error("Interrupted waiting for start", e); |
| } |
| } |
| |
| @Override |
| public void run() { |
| try { |
| connect(); |
| _startCountDown.countDown(); |
| _stopCountDown.await(); |
| } catch (Exception e) { |
| LOG.error("exception running controller-manager", e); |
| } finally { |
| _startCountDown.countDown(); |
| disconnect(); |
| _waitStopFinishCountDown.countDown(); |
| } |
| } |
| |
| @Override |
| public RealmAwareZkClient getZkClient() { |
| return _zkclient; |
| } |
| |
| @Override |
| public List<CallbackHandler> getHandlers() { |
| return _handlers; |
| } |
| |
| @Override |
| public void finalize() { |
| _watcher.interrupt(); |
| try { |
| _watcher.join(DISCONNECT_WAIT_TIME_MS); |
| } catch (InterruptedException e) { |
| LOG.error("ClusterManager watcher cleanup in the finalize method was interrupted.", e); |
| } finally { |
| if (isConnected()) { |
| LOG.warn( |
| "The HelixManager ({}-{}-{}) is still connected after {} ms wait. This is a potential resource leakage!", |
| _clusterName, _instanceName, _type.name(), DISCONNECT_WAIT_TIME_MS); |
| } |
| } |
| } |
| } |
| |