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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.hc.client5.http.async;

import java.util.concurrent.Future;

import org.apache.hc.core5.concurrent.FutureCallback;
import org.apache.hc.core5.http.nio.AsyncPushConsumer;
import org.apache.hc.core5.http.nio.AsyncRequestProducer;
import org.apache.hc.core5.http.nio.AsyncResponseConsumer;
import org.apache.hc.core5.http.nio.HandlerFactory;
import org.apache.hc.core5.http.protocol.HttpContext;

/**
 * This interface represents only the most basic contract for HTTP request
 * execution. It imposes no restrictions or particular details on the request
 * execution process and leaves the specifics of state management,
 * authentication and redirect handling up to individual implementations.
 *
 * @since 4.0
 */
public interface HttpAsyncClient {

    /**
     * Initiates asynchronous HTTP request execution using the given context.
     * 
     * The request producer passed to this method will be used to generate
     * a request message and stream out its content without buffering it
     * in memory. The response consumer passed to this method will be used
     * to process a response message without buffering its content in memory.
     * 
     * Please note it may be unsafe to interact with the context instance
     * while the request is still being executed.
     *
     * @param  the result type of request execution.
     * @param requestProducer request producer callback.
     * @param responseConsumer response consumer callback.
     * @param pushHandlerFactory the push handler factory. Optional and may be {@code null}.
     * @param context HTTP context. Optional and may be {@code null}.
     * @param callback future callback. Optional and may be {@code null}.
     * @return future representing pending completion of the operation.
     */
     Future execute(
            AsyncRequestProducer requestProducer,
            AsyncResponseConsumer responseConsumer,
            HandlerFactory pushHandlerFactory,
            HttpContext context,
            FutureCallback callback);

}