io.prestosql.jdbc.$internal.guava.util.concurrent.WrappingExecutorService Maven / Gradle / Ivy
/*
* Copyright (C) 2011 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package io.prestosql.jdbc.$internal.guava.util.concurrent;
import static io.prestosql.jdbc.$internal.guava.base.Preconditions.checkNotNull;
import static io.prestosql.jdbc.$internal.guava.base.Throwables.throwIfUnchecked;
import io.prestosql.jdbc.$internal.guava.annotations.GwtIncompatible;
import io.prestosql.jdbc.$internal.guava.collect.ImmutableList;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
* An abstract {@code ExecutorService} that allows subclasses to {@linkplain #wrapTask(Callable)
* wrap} tasks before they are submitted to the underlying executor.
*
* Note that task wrapping may occur even if the task is never executed.
*
*
For delegation without task-wrapping, see {@link ForwardingExecutorService}.
*
* @author Chris Nokleberg
*/
@CanIgnoreReturnValue // TODO(cpovirk): Consider being more strict.
@GwtIncompatible
abstract class WrappingExecutorService implements ExecutorService {
private final ExecutorService delegate;
protected WrappingExecutorService(ExecutorService delegate) {
this.delegate = checkNotNull(delegate);
}
/**
* Wraps a {@code Callable} for submission to the underlying executor. This method is also applied
* to any {@code Runnable} passed to the default implementation of {@link #wrapTask(Runnable)}.
*/
protected abstract Callable wrapTask(Callable callable);
/**
* Wraps a {@code Runnable} for submission to the underlying executor. The default implementation
* delegates to {@link #wrapTask(Callable)}.
*/
protected Runnable wrapTask(Runnable command) {
final Callable