/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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.hazelcast.spi.impl.executionservice.impl;
import com.hazelcast.core.ExecutionCallback;
import com.hazelcast.logging.ILogger;
import com.hazelcast.spi.ExecutionService;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.annotation.QuickTest;
import com.hazelcast.util.executor.ManagedExecutorService;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import java.util.concurrent.Callable;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import static com.hazelcast.util.ExceptionUtil.sneakyThrow;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyZeroInteractions;
import static org.mockito.Mockito.when;
@RunWith(HazelcastParallelClassRunner.class)
@Category(QuickTest.class)
public class BasicCompletableFutureTest {
private static final String DELEGATE_RESULT = "DELEGATE_RESULT";
@Rule
public ExpectedException expected = ExpectedException.none();
private FutureTask<String> delegateFuture;
private boolean delegateThrowException;
private BasicCompletableFuture<String> outerFuture;
@Before
public void given() {
delegateThrowException = false;
delegateFuture = future(DELEGATE_RESULT);
outerFuture = basicCompletableFuture(delegateFuture);
}
@Test
public void cancel_delegate_bothCancelled() {
delegateFuture.cancel(false);
assertTrue(delegateFuture.isCancelled());
assertTrue(outerFuture.isCancelled());
}
@Test
public void cancel_delegate_getOnDelegate() throws Exception {
delegateFuture.cancel(false);
expected.expect(CancellationException.class);
delegateFuture.get();
}
@Test
public void cancel_delegate_getOnOuter() throws Exception {
delegateFuture.cancel(false);
expected.expect(CancellationException.class);
outerFuture.get();
}
@Test
public void cancel_outer_bothCancelled() {
outerFuture.cancel(false);
assertTrue(delegateFuture.isCancelled());
assertTrue(outerFuture.isCancelled());
}
@Test
public void cancel_outer_getOnDelegate() throws Exception {
outerFuture.cancel(false);
expected.expect(CancellationException.class);
delegateFuture.get();
}
@Test
public void cancel_outer_getOnOuter() throws Exception {
outerFuture.cancel(false);
expected.expect(CancellationException.class);
outerFuture.get();
}
@Test
public void completeDelegate_bothDone_delegateAskedFirst() {
delegateFuture.run();
assertTrue(delegateFuture.isDone());
assertTrue(outerFuture.isDone());
}
@Test
public void completeDelegate_bothDone_outerAskedFirst() {
delegateFuture.run();
assertTrue(outerFuture.isDone());
assertTrue(delegateFuture.isDone());
}
@Test
public void completeDelegate_getWithTimeout_delegateAsked() throws Exception {
delegateFuture.run();
assertEquals(DELEGATE_RESULT, delegateFuture.get(10, TimeUnit.MILLISECONDS));
}
@Test
public void completeDelegate_getWithTimeout_outerAsked() throws Exception {
delegateFuture.run();
assertEquals(DELEGATE_RESULT, outerFuture.get(10, TimeUnit.MILLISECONDS));
}
@Test
public void completeDelegate_successfully_callbacksNeverRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateFuture.run();
outerFuture.andThen(callback);
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_withException_callbacksNeverRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateThrowException = true;
delegateFuture.run();
outerFuture.andThen(callback);
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_successfully_callbackAfterGet_invokeIsDoneOnOuter_callbacksRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateFuture.run();
outerFuture.isDone();
outerFuture.andThen(callback);
verify(callback, times(1)).onResponse(any(String.class));
verify(callback, times(0)).onFailure(any(Throwable.class));
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_successfully_callbackAfterGet_invokeGetOnOuter_callbacksRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateFuture.run();
outerFuture.get();
outerFuture.andThen(callback);
verify(callback, times(1)).onResponse(any(String.class));
verify(callback, times(0)).onFailure(any(Throwable.class));
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_successfully_callbackBeforeGet_invokeIsDoneOnOuter_callbacksRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateFuture.run();
outerFuture.andThen(callback);
outerFuture.isDone();
verify(callback, times(1)).onResponse(any(String.class));
verify(callback, times(0)).onFailure(any(Throwable.class));
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_successfully_callbackBeforeGet_invokeGetOnOuter_callbacksRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateFuture.run();
outerFuture.andThen(callback);
outerFuture.get();
verify(callback, times(1)).onResponse(any(String.class));
verify(callback, times(0)).onFailure(any(Throwable.class));
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_withException_callbackBeforeGet_invokeIsDoneOnOuter_callbacksRun() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateThrowException = true;
delegateFuture.run();
outerFuture.andThen(callback);
outerFuture.isDone();
verify(callback, times(0)).onResponse(any(String.class));
verify(callback, times(1)).onFailure(any(Throwable.class));
verifyZeroInteractions(callback);
}
@Test
public void completeDelegate_withException_callbackBeforeGet_invokeGetOnOuter_callbacksNeverReached() throws Exception {
ExecutionCallback<String> callback = getStringExecutionCallback();
delegateThrowException = true;
delegateFuture.run();
outerFuture.andThen(callback);
try {
outerFuture.get();
fail();
} catch (Throwable t) {
assertEquals("Exception in execution", t.getCause().getMessage());
}
verify(callback, times(0)).onResponse(any(String.class));
verify(callback, times(1)).onFailure(any(Throwable.class));
verifyZeroInteractions(callback);
}
private <V> FutureTask<V> future(final V result) {
return new FutureTask<V>(new Callable<V>() {
@Override
public V call() throws Exception {
if (delegateThrowException) {
throw new RuntimeException("Exception in execution");
}
return result;
}
});
}
@SuppressWarnings("unchecked")
private static ExecutionCallback<String> getStringExecutionCallback() {
return mock(ExecutionCallback.class);
}
private static <V> BasicCompletableFuture<V> basicCompletableFuture(Future<V> future) {
NodeEngine engine = mock(NodeEngine.class);
when(engine.getLogger(BasicCompletableFuture.class)).thenReturn(mock(ILogger.class));
ExecutionService executionService = mock(ExecutionService.class);
when(engine.getExecutionService()).thenReturn(executionService);
when(executionService.getExecutor(anyString())).thenReturn(new TestCurrentThreadExecutor());
return new BasicCompletableFuture<V>(future, engine);
}
private static class TestCurrentThreadExecutor extends ThreadPoolExecutor implements ManagedExecutorService {
public TestCurrentThreadExecutor() {
super(1, 1, 1, TimeUnit.MINUTES, new LinkedBlockingQueue<Runnable>());
}
public String getName() {
return "hz:test:current:thread:executor";
}
public int getQueueSize() {
return Integer.MAX_VALUE;
}
public int getRemainingQueueCapacity() {
return Integer.MAX_VALUE;
}
public void execute(Runnable runnable) {
// run in current thread
try {
runnable.run();
} catch (Exception ex) {
sneakyThrow(new ExecutionException(ex));
}
}
}
}