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  @Deprecated
050  @Override
051  public <T> T callWithTimeout(
052      Callable<T> callable, long timeoutDuration, TimeUnit timeoutUnit, boolean amInterruptible)
053      throws Exception {
054    checkNotNull(timeoutUnit);
055    return callable.call(); // fooled you
056  }
057
058  @Override
059  public <T> T callWithTimeout(Callable<T> callable, long timeoutDuration, TimeUnit timeoutUnit)
060      throws ExecutionException {
061    checkNotNull(callable);
062    checkNotNull(timeoutUnit);
063    try {
064      return callable.call();
065    } catch (RuntimeException e) {
066      throw new UncheckedExecutionException(e);
067    } catch (Exception e) {
068      throw new ExecutionException(e);
069    } catch (Error e) {
070      throw new ExecutionError(e);
071    } catch (Throwable e) {
072      // It's a non-Error, non-Exception Throwable. Such classes are usually intended to extend
073      // Exception, so we'll treat it like an Exception.
074      throw new ExecutionException(e);
075    }
076  }
077
078  @Override
079  public <T> T callUninterruptiblyWithTimeout(
080      Callable<T> callable, long timeoutDuration, TimeUnit timeoutUnit) throws ExecutionException {
081    return callWithTimeout(callable, timeoutDuration, timeoutUnit);
082  }
083
084  @Override
085  public void runWithTimeout(Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
086    checkNotNull(runnable);
087    checkNotNull(timeoutUnit);
088    try {
089      runnable.run();
090    } catch (RuntimeException e) {
091      throw new UncheckedExecutionException(e);
092    } catch (Error e) {
093      throw new ExecutionError(e);
094    } catch (Throwable e) {
095      // It's a non-Error, non-Exception Throwable. Such classes are usually intended to extend
096      // Exception, so we'll treat it like a RuntimeException.
097      throw new UncheckedExecutionException(e);
098    }
099  }
100
101  @Override
102  public void runUninterruptiblyWithTimeout(
103      Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
104    runWithTimeout(runnable, timeoutDuration, timeoutUnit);
105  }
106}