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Issue #1053 - Drop support Android and remove Fennec - Part 1a: Remove mobile/android
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/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "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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* http://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,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.concurrent;
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import ch.boye.httpclientandroidlib.util.Args;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.Future;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.TimeoutException;
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/**
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* Basic implementation of the {@link Future} interface. <tt>BasicFuture<tt>
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* can be put into a completed state by invoking any of the following methods:
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* {@link #cancel()}, {@link #failed(Exception)}, or {@link #completed(Object)}.
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*
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* @param <T> the future result type of an asynchronous operation.
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* @since 4.2
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*/
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public class BasicFuture<T> implements Future<T>, Cancellable {
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private final FutureCallback<T> callback;
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private volatile boolean completed;
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private volatile boolean cancelled;
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private volatile T result;
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private volatile Exception ex;
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public BasicFuture(final FutureCallback<T> callback) {
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super();
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this.callback = callback;
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}
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public boolean isCancelled() {
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return this.cancelled;
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}
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public boolean isDone() {
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return this.completed;
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}
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private T getResult() throws ExecutionException {
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if (this.ex != null) {
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throw new ExecutionException(this.ex);
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}
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return this.result;
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}
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public synchronized T get() throws InterruptedException, ExecutionException {
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while (!this.completed) {
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wait();
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}
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return getResult();
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}
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public synchronized T get(final long timeout, final TimeUnit unit)
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throws InterruptedException, ExecutionException, TimeoutException {
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Args.notNull(unit, "Time unit");
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final long msecs = unit.toMillis(timeout);
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final long startTime = (msecs <= 0) ? 0 : System.currentTimeMillis();
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long waitTime = msecs;
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if (this.completed) {
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return getResult();
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} else if (waitTime <= 0) {
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throw new TimeoutException();
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} else {
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for (;;) {
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wait(waitTime);
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if (this.completed) {
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return getResult();
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} else {
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waitTime = msecs - (System.currentTimeMillis() - startTime);
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if (waitTime <= 0) {
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throw new TimeoutException();
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}
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}
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}
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}
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}
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public boolean completed(final T result) {
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synchronized(this) {
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if (this.completed) {
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return false;
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}
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this.completed = true;
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this.result = result;
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notifyAll();
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}
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if (this.callback != null) {
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this.callback.completed(result);
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}
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return true;
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}
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public boolean failed(final Exception exception) {
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synchronized(this) {
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if (this.completed) {
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return false;
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}
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this.completed = true;
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this.ex = exception;
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notifyAll();
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}
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if (this.callback != null) {
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this.callback.failed(exception);
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}
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return true;
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}
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public boolean cancel(final boolean mayInterruptIfRunning) {
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synchronized(this) {
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if (this.completed) {
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return false;
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}
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this.completed = true;
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this.cancelled = true;
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notifyAll();
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}
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if (this.callback != null) {
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this.callback.cancelled();
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}
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return true;
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}
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public boolean cancel() {
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return cancel(true);
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}
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}
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