/*

 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * <h2>High level HTTP and WebSocket API</h2>

 *

 * <p> Provides high-level client interfaces to HTTP (versions 1.1 and 2) and

 * WebSocket. The main types defined are:

 *

 * <ul>

 * </ul>

 *

 * <p> The API functions asynchronously (using {@link java.util.concurrent.CompletableFuture})

 * and work is done on the threads supplied by the client's {@link java.util.concurrent.Executor}

 * where practical.

 *

 * <p> {@code HttpClient} also provides a simple synchronous mode, where all

 * work may be done on the calling thread.

 *

 * <p> {@code CompletableFuture}s returned by this API will throw {@link java.lang.UnsupportedOperationException}

 * for their {@link java.util.concurrent.CompletableFuture#obtrudeValue(Object) obtrudeValue}

 * and {@link java.util.concurrent.CompletableFuture#obtrudeException(Throwable) obtrudeException}

 * methods. Invoking the {@link java.util.concurrent.CompletableFuture#cancel cancel}

 * method on a {@code CompletableFuture} returned by this API will not interrupt

 * the underlying operation, but may be useful to complete, exceptionally,

 * dependent stages that have not already completed.

 *

 * <p> Unless otherwise stated, {@code null} parameter values will cause methods

 * of all classes in this package to throw {@code NullPointerException}.

 *

 * @since 11

 */