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    • com.ats.tools.TimeLimitedCodeBlock Maven / Gradle / Ivy

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    /*
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 com.ats.tools;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class TimeLimitedCodeBlock {

	public static void runWithTimeout(final Runnable runnable, long timeout, TimeUnit timeUnit) throws Exception {
		runWithTimeout(new Callable() {
			@Override
			public Object call() throws Exception {
				runnable.run();
				return null;
			}
		}, timeout, timeUnit);
	}

	public static  T runWithTimeout(Callable callable, long timeout, TimeUnit timeUnit) throws Exception {
		final ExecutorService executor = Executors.newSingleThreadExecutor();
		final Future future = executor.submit(callable);
		executor.shutdown(); // This does not cancel the already-scheduled task.
		try {
			return future.get(timeout, timeUnit);
		}
		catch (TimeoutException e) {
			//remove this if you do not want to cancel the job in progress
			//or set the argument to 'false' if you do not want to interrupt the thread
			future.cancel(true);
			throw e;
		}
		catch (ExecutionException e) {
			//unwrap the root cause
			Throwable t = e.getCause();
			if (t instanceof Error) {
				throw (Error) t;
			} else if (t instanceof Exception) {
				throw (Exception) t;
			} else {
				throw new IllegalStateException(t);
			}
		}
	}
}
    
    
    
    

    




    
    
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