001/*
002 * Copyright (C) 2006 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005 * in compliance with the License. You may obtain a copy of the License at
006 *
007 * http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software distributed under the License
010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011 * or implied. See the License for the specific language governing permissions and limitations under
012 * the License.
013 */
014
015package com.google.common.util.concurrent;
016
017import static com.google.common.base.Preconditions.checkNotNull;
018
019import com.google.common.annotations.Beta;
020import com.google.common.annotations.GwtIncompatible;
021import com.google.errorprone.annotations.CanIgnoreReturnValue;
022import java.util.concurrent.Callable;
023import java.util.concurrent.ExecutionException;
024import java.util.concurrent.TimeUnit;
025
026/**
027 * A TimeLimiter implementation which actually does not attempt to limit time at all. This may be
028 * desirable to use in some unit tests. More importantly, attempting to debug a call which is
029 * time-limited would be extremely annoying, so this gives you a time-limiter you can easily swap in
030 * for your real time-limiter while you're debugging.
031 *
032 * @author Kevin Bourrillion
033 * @author Jens Nyman
034 * @since 1.0
035 */
036@Beta
037@CanIgnoreReturnValue
038@GwtIncompatible
039public final class FakeTimeLimiter implements TimeLimiter {
040  @Override
041  public <T> T newProxy(
042      T target, Class<T> interfaceType, long timeoutDuration, TimeUnit timeoutUnit) {
043    checkNotNull(target);
044    checkNotNull(interfaceType);
045    checkNotNull(timeoutUnit);
046    return target; // ha ha
047  }
048
049  @Override
050  public <T> T callWithTimeout(Callable<T> callable, long timeoutDuration, TimeUnit timeoutUnit)
051      throws ExecutionException {
052    checkNotNull(callable);
053    checkNotNull(timeoutUnit);
054    try {
055      return callable.call();
056    } catch (RuntimeException e) {
057      throw new UncheckedExecutionException(e);
058    } catch (Exception e) {
059      throw new ExecutionException(e);
060    } catch (Error e) {
061      throw new ExecutionError(e);
062    } catch (Throwable e) {
063      // It's a non-Error, non-Exception Throwable. Such classes are usually intended to extend
064      // Exception, so we'll treat it like an Exception.
065      throw new ExecutionException(e);
066    }
067  }
068
069  @Override
070  public <T> T callUninterruptiblyWithTimeout(
071      Callable<T> callable, long timeoutDuration, TimeUnit timeoutUnit) throws ExecutionException {
072    return callWithTimeout(callable, timeoutDuration, timeoutUnit);
073  }
074
075  @Override
076  public void runWithTimeout(Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
077    checkNotNull(runnable);
078    checkNotNull(timeoutUnit);
079    try {
080      runnable.run();
081    } catch (RuntimeException e) {
082      throw new UncheckedExecutionException(e);
083    } catch (Error e) {
084      throw new ExecutionError(e);
085    } catch (Throwable e) {
086      // It's a non-Error, non-Exception Throwable. Such classes are usually intended to extend
087      // Exception, so we'll treat it like a RuntimeException.
088      throw new UncheckedExecutionException(e);
089    }
090  }
091
092  @Override
093  public void runUninterruptiblyWithTimeout(
094      Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
095    runWithTimeout(runnable, timeoutDuration, timeoutUnit);
096  }
097}