| /* |
| * 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.cassandra.concurrent; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| public class InfiniteLoopExecutor |
| { |
| private static final Logger logger = LoggerFactory.getLogger(InfiniteLoopExecutor.class); |
| |
| public interface InterruptibleRunnable |
| { |
| void run() throws InterruptedException; |
| } |
| |
| private final Thread thread; |
| private final InterruptibleRunnable runnable; |
| private volatile boolean isShutdown = false; |
| |
| public InfiniteLoopExecutor(String name, InterruptibleRunnable runnable) |
| { |
| this.runnable = runnable; |
| this.thread = new Thread(this::loop, name); |
| this.thread.setDaemon(true); |
| } |
| |
| private void loop() |
| { |
| while (!isShutdown) |
| { |
| try |
| { |
| runnable.run(); |
| } |
| catch (InterruptedException ie) |
| { |
| if (isShutdown) |
| return; |
| logger.error("Interrupted while executing {}, but not shutdown; continuing with loop", runnable, ie); |
| } |
| catch (Throwable t) |
| { |
| logger.error("Exception thrown by runnable, continuing with loop", t); |
| } |
| } |
| } |
| |
| public InfiniteLoopExecutor start() |
| { |
| thread.start(); |
| return this; |
| } |
| |
| public void shutdownNow() |
| { |
| isShutdown = true; |
| thread.interrupt(); |
| } |
| |
| public boolean awaitTermination(long time, TimeUnit unit) throws InterruptedException |
| { |
| thread.join(unit.toMillis(time)); |
| return !thread.isAlive(); |
| } |
| } |