| /* |
| * 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.iotdb.confignode.procedure; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public abstract class StoppableThread extends Thread { |
| |
| private static final int JOIN_TIMEOUT = 250; |
| private static final Logger LOG = LoggerFactory.getLogger(StoppableThread.class); |
| |
| public StoppableThread(ThreadGroup threadGroup, String name) { |
| super(threadGroup, name); |
| } |
| |
| public abstract void sendStopSignal(); |
| |
| public void awaitTermination() { |
| try { |
| for (int i = 0; isAlive(); i++) { |
| sendStopSignal(); |
| join(JOIN_TIMEOUT); |
| if (i > 0 && (i % 8) == 0) { |
| interrupt(); |
| } |
| } |
| } catch (InterruptedException e) { |
| LOG.warn("{} join wait got interrupted", getName(), e); |
| } |
| } |
| } |