/*
    * ====================================================================
    * 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
   * <http://www.apache.org/>.
   *
   */
  package org.apache.http.impl.nio.client;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.Future;
  
  import org.apache.http.HttpHost;
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpResponse;
  import org.apache.http.annotation.Contract;
  import org.apache.http.annotation.ThreadingBehavior;
  import org.apache.http.client.protocol.HttpClientContext;
  import org.apache.http.concurrent.FutureCallback;
  import org.apache.http.nio.client.HttpPipeliningClient;
  import org.apache.http.nio.client.methods.HttpAsyncMethods;
  import org.apache.http.nio.protocol.HttpAsyncRequestProducer;
  import org.apache.http.nio.protocol.HttpAsyncResponseConsumer;
  import org.apache.http.protocol.HttpContext;
  import org.apache.http.util.Args;
  
  /**
   * Base implementation of {@link org.apache.http.nio.client.HttpPipeliningClient} that also
   * implements {@link java.io.Closeable}.
   *
   * @since 4.1
   */
  @Contract(threading = ThreadingBehavior.SAFE)
  public abstract class CloseableHttpPipeliningClient
          extends CloseableHttpAsyncClient implements HttpPipeliningClient {
  
      @Override
      public <T> Future<List<T>> execute(
              final HttpHost target,
              final List<? extends HttpAsyncRequestProducer> requestProducers,
              final List<? extends HttpAsyncResponseConsumer<T>> responseConsumers,
              final FutureCallback<List<T>> callback) {
          return execute(target, requestProducers, responseConsumers, HttpClientContext.create(), callback);
      }
  
      @Override
      public Future<List<HttpResponse>> execute(
              final HttpHost target,
              final List<HttpRequest> requests,
              final FutureCallback<List<HttpResponse>> callback) {
          return execute(target, requests, HttpClientContext.create(), callback);
      }
  
      @Override
      public Future<List<HttpResponse>> execute(
              final HttpHost target,
              final List<HttpRequest> requests,
              final HttpContext context,
              final FutureCallback<List<HttpResponse>> callback) {
          Args.notEmpty(requests, "HTTP request list");
          final List<HttpAsyncRequestProducer> requestProducers = new ArrayList<HttpAsyncRequestProducer>(
                  requests.size());
          final List<HttpAsyncResponseConsumer<HttpResponse>> responseConsumers = new ArrayList<HttpAsyncResponseConsumer<HttpResponse>>(
                  requests.size());
          for (int i = 0; i < requests.size(); i++) {
              final HttpRequest request = requests.get(i);
              requestProducers.add(HttpAsyncMethods.create(target, request));
              responseConsumers.add(HttpAsyncMethods.createConsumer());
          }
          return execute(target, requestProducers, responseConsumers, context, callback);
      }
  
  }