content: /*
   * 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.utils.concurrent;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  import java.util.function.Predicate;
  import java.util.function.Consumer;
  
  import com.google.common.util.concurrent.Uninterruptibles;
  import org.junit.Assert;
  
  import net.openhft.chronicle.core.util.ThrowingBiConsumer;
  import net.openhft.chronicle.core.util.ThrowingConsumer;
  import net.openhft.chronicle.core.util.ThrowingFunction;
  
  import static java.util.concurrent.TimeUnit.MILLISECONDS;
  import static java.util.concurrent.TimeUnit.SECONDS;
  import static org.apache.cassandra.utils.Clock.Global.nanoTime;
  
  public abstract class AbstractTestAwaitable<A extends Awaitable>
  {
      protected final ExecutorService exec = Executors.newCachedThreadPool();
  
      protected void testOneSuccess(A awaitable, Consumer<A> signal)
      {
          Async async = new Async();
          //noinspection Convert2MethodRef
          async.success(awaitable, a -> a.await(), awaitable);
          async.success(awaitable, a -> a.awaitUninterruptibly(), awaitable);
          async.success(awaitable, a -> a.awaitThrowUncheckedOnInterrupt(), awaitable);
          async.success(awaitable, a -> a.await(1L, SECONDS), true);
          async.success(awaitable, a -> a.awaitUninterruptibly(1L, SECONDS), true);
          async.success(awaitable, a -> a.awaitThrowUncheckedOnInterrupt(1L, SECONDS), true);
          async.success(awaitable, a -> a.awaitUntil(Long.MAX_VALUE), true);
          async.success(awaitable, a -> a.awaitUntilUninterruptibly(Long.MAX_VALUE), true);
          async.success(awaitable, a -> a.awaitUntilThrowUncheckedOnInterrupt(Long.MAX_VALUE), true);
          signal.accept(awaitable);
          async.verify();
      }
  
      public void testOneTimeout(A awaitable)
      {
          Async async = new Async();
          async.success(awaitable, a -> a.await(1L, MILLISECONDS), false);
          async.success(awaitable, a -> a.awaitUninterruptibly(1L, MILLISECONDS), false);
          async.success(awaitable, a -> a.awaitThrowUncheckedOnInterrupt(1L, MILLISECONDS), false);
          async.success(awaitable, a -> a.awaitUntil(nanoTime() + MILLISECONDS.toNanos(1L)), false);
          async.success(awaitable, a -> a.awaitUntilUninterruptibly(nanoTime() + MILLISECONDS.toNanos(1L)), false);
          async.success(awaitable, a -> a.awaitUntilThrowUncheckedOnInterrupt(nanoTime() + MILLISECONDS.toNanos(1L)), false);
          Uninterruptibles.sleepUninterruptibly(10L, MILLISECONDS);
          async.verify();
      }
  
      public void testOneInterrupt(A awaitable)
      {
          Async async = new Async();
          async.failure(awaitable, a -> { Thread.currentThread().interrupt(); a.await(); }, InterruptedException.class);
          async.failure(awaitable, a -> { Thread.currentThread().interrupt(); a.await(1L, SECONDS); }, InterruptedException.class);
          async.success(awaitable, a -> { Thread.currentThread().interrupt(); return a.awaitUninterruptibly(1L, SECONDS); }, false);
          async.failure(awaitable, a -> { Thread.currentThread().interrupt(); a.awaitThrowUncheckedOnInterrupt(1L, SECONDS); }, UncheckedInterruptedException.class);
          async.failure(awaitable, a -> { Thread.currentThread().interrupt(); a.awaitUntil(nanoTime() + SECONDS.toNanos(1L)); }, InterruptedException.class);
          async.success(awaitable, a -> { Thread.currentThread().interrupt(); return a.awaitUntilUninterruptibly(nanoTime() + SECONDS.toNanos(1L)); }, false);
          async.failure(awaitable, a -> { Thread.currentThread().interrupt(); a.awaitUntilThrowUncheckedOnInterrupt(nanoTime() + SECONDS.toNanos(1L)); }, UncheckedInterruptedException.class);
          Uninterruptibles.sleepUninterruptibly(2L, SECONDS);
          async.verify();
      }
  
      class Async
      {
          final List<ThrowingBiConsumer<Long, TimeUnit, ?>> waitingOn = new ArrayList<>();
          void verify()
          {
              for (int i = 0 ; i < waitingOn.size() ; ++i)
              {
                  try
                  {
                      waitingOn.get(i).accept(100L, MILLISECONDS);
                  }
                  catch (Throwable t)
                  {
                      throw new AssertionError("" + i, t);
                  }
              }
          }
          void failure(A awaitable, ThrowingConsumer<A, ?> action, Throwable failsWith)
          {
              waitingOn.add(exec.submit(() -> AbstractTestAwaitable.failure(awaitable, action, failsWith))::get);
          }
          void failure(A awaitable, ThrowingConsumer<A, ?> action, Class<? extends Throwable> failsWith)
          {
              waitingOn.add(exec.submit(() -> AbstractTestAwaitable.failure(awaitable, action, failsWith))::get);
          }
          void failure(A awaitable, ThrowingConsumer<A, ?> action, Predicate<Throwable> failsWith)
          {
              waitingOn.add(exec.submit(() -> AbstractTestAwaitable.failure(awaitable, action, failsWith))::get);
          }
          <P extends A, R> void success(P awaitable, ThrowingFunction<P, R, ?> action, R result)
          {
              waitingOn.add(exec.submit(() -> AbstractTestAwaitable.success(awaitable, action, result))::get);
          }
          <P extends A, R> void success(P awaitable, ThrowingFunction<P, R, ?> action, Predicate<R> result)
          {
              waitingOn.add(exec.submit(() -> AbstractTestAwaitable.success(awaitable, action, result))::get);
          }
      }
  
      private static <A extends Awaitable> void failure(A awaitable, ThrowingConsumer<A, ?> action, Throwable failsWith)
      {
          failure(awaitable, action, t -> Objects.equals(failsWith, t));
      }
  
      static <A extends Awaitable> void failure(A awaitable, ThrowingConsumer<A, ?> action, Class<? extends Throwable> failsWith)
      {
          failure(awaitable, action, failsWith::isInstance);
      }
  
      private static <A extends Awaitable> void failure(A awaitable, ThrowingConsumer<A, ?> action, Predicate<Throwable> failsWith)
      {
          Throwable fail = null;
          try
          {
              action.accept(awaitable);
          }
          catch (Throwable t)
          {
              fail = t;
          }
          if (!failsWith.test(fail))
              throw new AssertionError(fail);
      }
  
      static <A extends Awaitable, R> void success(A awaitable, ThrowingFunction<A, R, ?> action, R result)
      {
          try
          {
              Assert.assertEquals(result, action.apply(awaitable));
          }
          catch (Throwable t)
          {
              throw new AssertionError(t);
          }
      }
  
      static <A extends Awaitable, R> void success(A awaitable, ThrowingFunction<A, R, ?> action, Predicate<R> result)
      {
          try
          {
              Assert.assertTrue(result.test(action.apply(awaitable)));
          }
          catch (Throwable t)
          {
              throw new AssertionError(t);
          }
      }
  
  }
  