/*
    * ====================================================================
    * 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.List;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import java.util.concurrent.ThreadFactory;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.http.ConnectionReuseStrategy;
  import org.apache.http.HttpHost;
  import org.apache.http.client.protocol.HttpClientContext;
  import org.apache.http.concurrent.BasicFuture;
  import org.apache.http.concurrent.FutureCallback;
  import org.apache.http.conn.ConnectionKeepAliveStrategy;
  import org.apache.http.impl.DefaultConnectionReuseStrategy;
  import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;
  import org.apache.http.nio.NHttpClientEventHandler;
  import org.apache.http.nio.conn.NHttpClientConnectionManager;
  import org.apache.http.nio.protocol.HttpAsyncRequestExecutor;
  import org.apache.http.nio.protocol.HttpAsyncRequestProducer;
  import org.apache.http.nio.protocol.HttpAsyncResponseConsumer;
  import org.apache.http.protocol.BasicHttpContext;
  import org.apache.http.protocol.HttpContext;
  import org.apache.http.protocol.HttpProcessor;
  
  class MinimalHttpAsyncClient extends CloseableHttpAsyncClientBase {
  
      private final Log log = LogFactory.getLog(getClass());
  
      private final NHttpClientConnectionManager connmgr;
      private final HttpProcessor httpProcessor;
      private final ConnectionReuseStrategy connReuseStrategy;
      private final ConnectionKeepAliveStrategy keepaliveStrategy;
  
      public MinimalHttpAsyncClient(
              final NHttpClientConnectionManager connmgr,
              final ThreadFactory threadFactory,
              final NHttpClientEventHandler eventHandler,
              final HttpProcessor httpProcessor,
              final ConnectionReuseStrategy connReuseStrategy,
              final ConnectionKeepAliveStrategy keepaliveStrategy) {
          super(connmgr, threadFactory, eventHandler);
          this.connmgr = connmgr;
          this.httpProcessor = httpProcessor;
          this.connReuseStrategy = connReuseStrategy;
          this.keepaliveStrategy = keepaliveStrategy;
      }
  
      public MinimalHttpAsyncClient(
              final NHttpClientConnectionManager connmgr,
              final HttpProcessor httpProcessor) {
          this(connmgr,
                  Executors.defaultThreadFactory(),
                  new HttpAsyncRequestExecutor(),
                  httpProcessor,
                  DefaultConnectionReuseStrategy.INSTANCE,
                  DefaultConnectionKeepAliveStrategy.INSTANCE);
      }
  
      @Override
      public <T> Future<T> execute(
              final HttpAsyncRequestProducer requestProducer,
              final HttpAsyncResponseConsumer<T> responseConsumer,
              final HttpContext context,
              final FutureCallback<T> callback) {
          ensureRunning();
          final BasicFuture<T> future = new BasicFuture<T>(callback);
          final HttpClientContext localcontext = HttpClientContext.adapt(
              context != null ? context : new BasicHttpContext());
  
          @SuppressWarnings("resource")
          final MinimalClientExchangeHandlerImpl<T> handler = new MinimalClientExchangeHandlerImpl<T>(
             this.log,
             requestProducer,
             responseConsumer,
             localcontext,
             future,
             this.connmgr,
             this.httpProcessor,
             this.connReuseStrategy,
             this.keepaliveStrategy);
         try {
             handler.start();
         } catch (final Exception ex) {
             handler.failed(ex);
         }
         return new FutureWrapper<T>(future, handler);
     }
 
     @Override
     public <T> Future<List<T>> execute(
             final HttpHost target,
             final List<? extends HttpAsyncRequestProducer> requestProducers,
             final List<? extends HttpAsyncResponseConsumer<T>> responseConsumers,
             final HttpContext context,
             final FutureCallback<List<T>> callback) {
         ensureRunning();
         final BasicFuture<List<T>> future = new BasicFuture<List<T>>(callback);
         final HttpClientContext localcontext = HttpClientContext.adapt(
                 context != null ? context : new BasicHttpContext());
         @SuppressWarnings("resource")
         final PipeliningClientExchangeHandlerImpl<T> handler = new PipeliningClientExchangeHandlerImpl<T>(
                 this.log,
                 target,
                 requestProducers,
                 responseConsumers,
                 localcontext,
                 future,
                 this.connmgr,
                 this.httpProcessor,
                 this.connReuseStrategy,
                 this.keepaliveStrategy);
         try {
             handler.start();
         } catch (final Exception ex) {
             handler.failed(ex);
         }
         return new FutureWrapper<List<T>>(future, handler);
     }
 
 }