0cb4cc4e49
Motivation: We wish to separate these two into clearer write/read interfaces. In particular, we don't want to be able to add listeners to promises, because it makes it easy to add them out of order. We can't prevent it entirely, because any promise can be freely converted to a future where listeners can be added. We can, however, discourage this in the API. Modification: The Promise interface no longer extends the Future interface. Numerous changes to make the project compile and its tests run. Result: Clearer separation of concerns in the code.
199 lines
5.2 KiB
Java
199 lines
5.2 KiB
Java
/*
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* Copyright 2018 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util.concurrent;
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import static java.util.Objects.requireNonNull;
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import io.netty.util.internal.StringUtil;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.TimeoutException;
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final class RunnableFutureAdapter<V> implements RunnableFuture<V> {
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private final Promise<V> promise;
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private final Future<V> future;
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private final Callable<V> task;
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RunnableFutureAdapter(Promise<V> promise, Callable<V> task) {
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this.promise = requireNonNull(promise, "promise");
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this.task = requireNonNull(task, "task");
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future = promise.asFuture();
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}
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@Override
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public EventExecutor executor() {
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return promise.executor();
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}
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@Override
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public boolean isSuccess() {
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return promise.isSuccess();
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}
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@Override
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public boolean isFailed() {
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return promise.isFailed();
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}
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@Override
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public boolean isCancellable() {
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return promise.isCancellable();
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}
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@Override
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public Throwable cause() {
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return promise.cause();
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}
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@Override
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public RunnableFuture<V> addListener(FutureListener<? super V> listener) {
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future.addListener(listener);
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return this;
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}
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@Override
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public <C> RunnableFuture<V> addListener(C context, FutureContextListener<? super C, ? super V> listener) {
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future.addListener(context, listener);
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return this;
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}
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@Override
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public RunnableFuture<V> sync() throws InterruptedException {
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future.sync();
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return this;
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}
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@Override
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public RunnableFuture<V> syncUninterruptibly() {
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future.syncUninterruptibly();
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return this;
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}
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@Override
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public RunnableFuture<V> await() throws InterruptedException {
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future.await();
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return this;
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}
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@Override
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public RunnableFuture<V> awaitUninterruptibly() {
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future.awaitUninterruptibly();
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return this;
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}
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@Override
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public boolean await(long timeout, TimeUnit unit) throws InterruptedException {
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return future.await(timeout, unit);
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}
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@Override
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public boolean await(long timeoutMillis) throws InterruptedException {
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return future.await(timeoutMillis);
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}
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@Override
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public boolean awaitUninterruptibly(long timeout, TimeUnit unit) {
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return future.awaitUninterruptibly(timeout, unit);
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}
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@Override
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public boolean awaitUninterruptibly(long timeoutMillis) {
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return future.awaitUninterruptibly(timeoutMillis);
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}
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@Override
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public V getNow() {
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return promise.getNow();
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}
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@Override
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public void run() {
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try {
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if (promise.setUncancellable()) {
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V result = task.call();
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promise.setSuccess(result);
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}
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} catch (Throwable e) {
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promise.setFailure(e);
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}
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}
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@Override
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public boolean cancel(boolean mayInterruptIfRunning) {
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return future.cancel(mayInterruptIfRunning);
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}
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@Override
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public boolean cancel() {
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return cancel(false);
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}
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@Override
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public boolean isCancelled() {
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return promise.isCancelled();
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}
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@Override
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public boolean isDone() {
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return promise.isDone();
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}
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@Override
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public V get() throws InterruptedException, ExecutionException {
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return future.get();
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}
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@Override
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public V get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
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return future.get(timeout, unit);
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}
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@Override
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public String toString() {
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StringBuilder buf = new StringBuilder(64)
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.append(StringUtil.simpleClassName(this))
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.append('@')
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.append(Integer.toHexString(hashCode()));
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if (!isDone()) {
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buf.append("(incomplete)");
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} else {
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Throwable cause = cause();
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if (cause != null) {
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buf.append("(failure: ")
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.append(cause)
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.append(')');
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} else {
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Object result = getNow();
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if (result == null) {
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buf.append("(success)");
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} else {
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buf.append("(success: ")
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.append(result)
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.append(')');
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}
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}
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}
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return buf.append(" task: ")
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.append(task)
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.append(')').toString();
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}
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}
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