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 org.junit.After;
  import org.junit.Assert;
  import org.junit.Test;
  
  import java.util.List;
  import java.util.concurrent.Callable;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.function.Supplier;
  import java.util.stream.Collectors;
  
  import com.google.common.collect.ImmutableList;
  import com.google.common.util.concurrent.MoreExecutors;
  
  import io.netty.util.concurrent.Future;
  import io.netty.util.concurrent.GenericFutureListener;
  import org.apache.cassandra.concurrent.ExecutorPlus;
  import org.apache.cassandra.utils.WithResources;
  
  public class AsyncPromiseTest extends AbstractTestAsyncPromise
  {
      @After
      public void shutdown()
      {
          exec.shutdownNow();
      }
  
      private static <V> List<Supplier<Promise<V>>> suppliers(AtomicInteger listeners, boolean includeUncancellable)
      {
          List<Supplier<Promise<V>>> cancellable = ImmutableList.of(
              () -> new AsyncPromise<>(),
              () -> new AsyncPromise<>(f -> listeners.incrementAndGet()),
              () -> AsyncPromise.withExecutor(TestInExecutor.INSTANCE));
          List<Supplier<Promise<V>>> uncancellable = ImmutableList.of(
              () -> AsyncPromise.uncancellable(),
              () -> AsyncPromise.uncancellable((GenericFutureListener<? extends Future<? super V>>) f -> listeners.incrementAndGet()),
              () -> AsyncPromise.uncancellable(MoreExecutors.directExecutor()),
              () -> AsyncPromise.uncancellable(TestInExecutor.INSTANCE)
          );
  
          if (!includeUncancellable)
              return cancellable;
  
          ImmutableList.Builder<Supplier<Promise<V>>> builder = ImmutableList.builder();
          builder.addAll(cancellable)
                 .addAll(cancellable.stream().map(s -> (Supplier<Promise<V>>) () -> cancelSuccess(s.get())).collect(Collectors.toList()))
                 .addAll(cancellable.stream().map(s -> (Supplier<Promise<V>>) () -> cancelExclusiveSuccess(s.get())).collect(Collectors.toList()))
                 .addAll(uncancellable)
                 .addAll(uncancellable.stream().map(s -> (Supplier<Promise<V>>) () -> cancelFailure(s.get())).collect(Collectors.toList()));
          return builder.build();
      }
  
      @Test
      public void testSuccess()
      {
          final AtomicInteger initialListeners = new AtomicInteger();
          List<Supplier<Promise<Integer>>> suppliers = suppliers(initialListeners, true);
          for (boolean tryOrSet : new boolean[]{ false, true })
              for (Integer v : new Integer[]{ null, 1 })
                  for (Supplier<Promise<Integer>> supplier : suppliers)
                      testOneSuccess(supplier.get(), tryOrSet, v, 2);
          Assert.assertEquals(5 * 2 * 2, initialListeners.get());
      }
  
      @Test
      public void testFailure()
      {
          final AtomicInteger initialListeners = new AtomicInteger();
          List<Supplier<Promise<Integer>>> suppliers = suppliers(initialListeners, true);
          for (boolean tryOrSet : new boolean[] { false, true })
              for (Throwable v : new Throwable[] { null, new NullPointerException() })
                  for (Supplier<Promise<Integer>> supplier : suppliers)
                      testOneFailure(supplier.get(), tryOrSet, v, 2);
          Assert.assertEquals(5 * 2 * 2, initialListeners.get());
      }
  
  
      @Test
      public void testCancellation()
      {
          final AtomicInteger initialListeners = new AtomicInteger();
          List<Supplier<Promise<Integer>>> suppliers = suppliers(initialListeners, false);
          for (boolean interruptIfRunning : new boolean[] { true, false })
              for (Supplier<Promise<Integer>> supplier : suppliers)
                  testOneCancellation(supplier.get(), interruptIfRunning, 2);
          Assert.assertEquals(2, initialListeners.get());
      }
  
  
      @Test
      public void testTimeout()
      {
          final AtomicInteger initialListeners = new AtomicInteger();
          List<Supplier<Promise<Integer>>> suppliers = suppliers(initialListeners, true);
          for (Supplier<Promise<Integer>> supplier : suppliers)
              testOneTimeout(supplier.get());
          Assert.assertEquals(0, initialListeners.get());
      }
  
      private static final class TestInExecutor implements ExecutorPlus
      {
          static final TestInExecutor INSTANCE = new TestInExecutor();
          @Override
          public void shutdown()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public List<Runnable> shutdownNow()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public boolean isShutdown()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public boolean isTerminated()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public <T> org.apache.cassandra.utils.concurrent.Future<T> submit(Callable<T> task)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public <T> org.apache.cassandra.utils.concurrent.Future<T> submit(Runnable task, T result)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public org.apache.cassandra.utils.concurrent.Future<?> submit(Runnable task)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public void execute(WithResources withResources, Runnable task)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public <T> org.apache.cassandra.utils.concurrent.Future<T> submit(WithResources withResources, Callable<T> task)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public org.apache.cassandra.utils.concurrent.Future<?> submit(WithResources withResources, Runnable task)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public <T> org.apache.cassandra.utils.concurrent.Future<T> submit(WithResources withResources, Runnable task, T result)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public boolean inExecutor()
          {
              return true;
          }
  
          @Override
          public void execute(Runnable command)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public int getCorePoolSize()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public void setCorePoolSize(int newCorePoolSize)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public int getMaximumPoolSize()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public void setMaximumPoolSize(int newMaximumPoolSize)
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public int getActiveTaskCount()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public long getCompletedTaskCount()
          {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public int getPendingTaskCount()
          {
              throw new UnsupportedOperationException();
          }
      }
  
  }
  
  