| /** |
| * 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.hbase.procedure2; |
| |
| import org.apache.hadoop.hbase.procedure2.util.StringUtils; |
| import org.apache.hadoop.hbase.util.EnvironmentEdgeManager; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @InterfaceAudience.Private |
| abstract class StoppableThread extends Thread { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(StoppableThread.class); |
| |
| public StoppableThread(final ThreadGroup group, final String name) { |
| super(group, name); |
| } |
| |
| public abstract void sendStopSignal(); |
| |
| public void awaitTermination() { |
| try { |
| final long startTime = EnvironmentEdgeManager.currentTime(); |
| for (int i = 0; isAlive(); ++i) { |
| sendStopSignal(); |
| join(250); |
| // Log every two seconds; send interrupt too. |
| if (i > 0 && (i % 8) == 0) { |
| LOG.warn("Waiting termination of thread {}, {}; sending interrupt", getName(), |
| StringUtils.humanTimeDiff(EnvironmentEdgeManager.currentTime() - startTime)); |
| interrupt(); |
| } |
| } |
| } catch (InterruptedException e) { |
| LOG.warn("{} join wait got interrupted", getName(), e); |
| } |
| } |
| } |