/*
    * ====================================================================
    * 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.client.cache;
  
  import org.apache.http.HttpException;
  import org.apache.http.HttpHost;
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpResponse;
  import org.apache.http.client.methods.HttpRequestWrapper;
  import org.apache.http.client.protocol.HttpClientContext;
  import org.apache.http.concurrent.BasicFuture;
  import org.apache.http.concurrent.FutureCallback;
  import org.apache.http.conn.routing.HttpRoute;
  import org.apache.http.impl.execchain.ClientExecChain;
  import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
  import org.apache.http.nio.conn.ClientAsyncConnectionManager;
  import org.apache.http.nio.protocol.HttpAsyncRequestProducer;
  import org.apache.http.nio.protocol.HttpAsyncResponseConsumer;
  import org.apache.http.nio.reactor.IOReactorStatus;
  import org.apache.http.params.HttpParams;
  import org.apache.http.protocol.HttpContext;
  
  import java.io.IOException;
  import java.util.concurrent.Future;
  
  public class ClientExecChainAsyncClient extends CloseableHttpAsyncClient {
  
      private final ClientExecChain backend;
  
      public ClientExecChainAsyncClient(final ClientExecChain backend) {
          super();
          this.backend = backend;
      }
  
      @Override
      public void start() {
          // no-op
      }
  
      @Override
      public boolean isRunning() {
          return true;
      }
  
      public void shutdown() throws InterruptedException {
          // no-op
      }
  
      public IOReactorStatus getStatus() {
          return null;
      }
  
      @SuppressWarnings("deprecation")
      public ClientAsyncConnectionManager getConnectionManager() {
          return null;
      }
  
      @SuppressWarnings("deprecation")
      public HttpParams getParams() {
          return null;
      }
  
      @Override
      public void close() throws IOException {
          // no-op
      }
  
      @Override
      public <T> Future<T> execute(
              final HttpAsyncRequestProducer requestProducer,
              final HttpAsyncResponseConsumer<T> responseConsumer,
              final HttpContext context,
              final FutureCallback<T> callback) {
          throw new UnsupportedOperationException();
      }
 
     @Override
     public Future<HttpResponse> execute(
             final HttpHost target,
             final HttpRequest request,
             final HttpContext context,
             final FutureCallback<HttpResponse> callback) {
         final BasicFuture<HttpResponse> future = new BasicFuture<HttpResponse>(
                 callback);
         try {
             final HttpResponse result = backend.execute(new HttpRoute(target),
                     HttpRequestWrapper.wrap(request),
                     HttpClientContext.adapt(context), null);
             future.completed(result);
         } catch (final IOException e) {
             future.failed(e);
         } catch (final HttpException e) {
             future.failed(e);
         }
         return future;
     }
 
 }