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/*
* Copyright (C) 2017 The Guava Authors
*
* 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.google.common.util.concurrent;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assertWithMessage;
import static com.google.common.util.concurrent.MoreExecutors.shutdownAndAwaitTermination;
import static com.google.common.util.concurrent.Uninterruptibles.awaitUninterruptibly;
import static java.util.concurrent.Executors.newSingleThreadExecutor;
import static java.util.concurrent.TimeUnit.SECONDS;
import com.google.common.util.concurrent.ClosingFuture.ClosingCallable;
import com.google.common.util.concurrent.ClosingFuture.DeferredCloser;
import com.google.common.util.concurrent.ClosingFuture.ValueAndCloser;
import com.google.common.util.concurrent.ClosingFuture.ValueAndCloserConsumer;
import java.io.Closeable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
/**
* Tests for {@link ClosingFuture} that exercise {@link
* ClosingFuture#finishToValueAndCloser(ValueAndCloserConsumer, Executor)}.
*/
public class ClosingFutureFinishToValueAndCloserTest extends AbstractClosingFutureTest {
private final ExecutorService finishToValueAndCloserExecutor = newSingleThreadExecutor();
private volatile ValueAndCloser<?> valueAndCloser;
@Override
protected void tearDown() throws Exception {
super.tearDown();
assertWithMessage("finishToValueAndCloserExecutor was shut down")
.that(shutdownAndAwaitTermination(finishToValueAndCloserExecutor, 10, SECONDS))
.isTrue();
}
public void testFinishToValueAndCloser_throwsIfCalledTwice() throws Exception {
ClosingFuture<Closeable> closingFuture =
ClosingFuture.submit(
new ClosingCallable<Closeable>() {
@Override
public Closeable call(DeferredCloser closer) throws Exception {
return closer.eventuallyClose(mockCloseable, executor);
}
},
executor);
closingFuture.finishToValueAndCloser(
new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor);
try {
closingFuture.finishToValueAndCloser(
new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor);
fail("should have thrown");
} catch (IllegalStateException expected) {
}
}
public void testFinishToValueAndCloser_throwsAfterCallingFinishToFuture() throws Exception {
ClosingFuture<Closeable> closingFuture =
ClosingFuture.submit(
new ClosingCallable<Closeable>() {
@Override
public Closeable call(DeferredCloser closer) throws Exception {
return closer.eventuallyClose(mockCloseable, executor);
}
},
executor);
FluentFuture<Closeable> unused = closingFuture.finishToFuture();
try {
closingFuture.finishToValueAndCloser(
new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor);
fail("should have thrown");
} catch (IllegalStateException expected) {
}
}
@Override
<T> T getFinalValue(ClosingFuture<T> closingFuture) throws ExecutionException {
return finishToValueAndCloser(closingFuture).get();
}
@Override
void assertFinallyFailsWithException(ClosingFuture<?> closingFuture) {
assertThatFutureFailsWithException(closingFuture.statusFuture());
ValueAndCloser<?> valueAndCloser = finishToValueAndCloser(closingFuture);
try {
valueAndCloser.get();
fail();
} catch (ExecutionException expected) {
assertThat(expected).hasCauseThat().isSameInstanceAs(exception);
}
valueAndCloser.closeAsync();
}
@Override
void assertBecomesCanceled(ClosingFuture<?> closingFuture) throws ExecutionException {
assertThatFutureBecomesCancelled(closingFuture.statusFuture());
}
@Override
void waitUntilClosed(ClosingFuture<?> closingFuture) {
if (valueAndCloser != null) {
valueAndCloser.closeAsync();
}
super.waitUntilClosed(closingFuture);
}
@Override
void cancelFinalStepAndWait(ClosingFuture<TestCloseable> closingFuture) {
assertThat(closingFuture.cancel(false)).isTrue();
ValueAndCloser<?> unused = finishToValueAndCloser(closingFuture);
waitUntilClosed(closingFuture);
futureCancelled.countDown();
}
private <V> ValueAndCloser<V> finishToValueAndCloser(ClosingFuture<V> closingFuture) {
final CountDownLatch valueAndCloserSet = new CountDownLatch(1);
closingFuture.finishToValueAndCloser(
new ValueAndCloserConsumer<V>() {
@Override
public void accept(ValueAndCloser<V> valueAndCloser) {
ClosingFutureFinishToValueAndCloserTest.this.valueAndCloser = valueAndCloser;
valueAndCloserSet.countDown();
}
},
finishToValueAndCloserExecutor);
assertWithMessage("valueAndCloser was set")
.that(awaitUninterruptibly(valueAndCloserSet, 10, SECONDS))
.isTrue();
@SuppressWarnings("unchecked")
ValueAndCloser<V> valueAndCloserWithType = (ValueAndCloser<V>) valueAndCloser;
return valueAndCloserWithType;
}
}
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