| /** |
| * 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. |
| */ |
| package org.apache.hadoop.ha; |
| |
| import java.util.Arrays; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.test.MultithreadedTestUtil.TestContext; |
| import org.apache.hadoop.util.StringUtils; |
| import org.apache.hadoop.util.Time; |
| import org.apache.zookeeper.KeeperException.NoNodeException; |
| import org.apache.zookeeper.data.Stat; |
| import org.apache.zookeeper.server.ZooKeeperServer; |
| |
| public abstract class ActiveStandbyElectorTestUtil { |
| |
| private static final Log LOG = LogFactory.getLog( |
| ActiveStandbyElectorTestUtil.class); |
| private static final long LOG_INTERVAL_MS = 500; |
| |
| public static void waitForActiveLockData(TestContext ctx, |
| ZooKeeperServer zks, String parentDir, byte[] activeData) |
| throws Exception { |
| long st = Time.now(); |
| long lastPrint = st; |
| while (true) { |
| if (ctx != null) { |
| ctx.checkException(); |
| } |
| try { |
| Stat stat = new Stat(); |
| byte[] data = zks.getZKDatabase().getData( |
| parentDir + "/" + |
| ActiveStandbyElector.LOCK_FILENAME, stat, null); |
| if (activeData != null && |
| Arrays.equals(activeData, data)) { |
| return; |
| } |
| if (Time.now() > lastPrint + LOG_INTERVAL_MS) { |
| LOG.info("Cur data: " + StringUtils.byteToHexString(data)); |
| lastPrint = Time.now(); |
| } |
| } catch (NoNodeException nne) { |
| if (activeData == null) { |
| return; |
| } |
| if (Time.now() > lastPrint + LOG_INTERVAL_MS) { |
| LOG.info("Cur data: no node"); |
| lastPrint = Time.now(); |
| } |
| } |
| Thread.sleep(50); |
| } |
| } |
| |
| public static void waitForElectorState(TestContext ctx, |
| ActiveStandbyElector elector, |
| ActiveStandbyElector.State state) throws Exception { |
| while (elector.getStateForTests() != state) { |
| if (ctx != null) { |
| ctx.checkException(); |
| } |
| Thread.sleep(50); |
| } |
| } |
| } |