/*
    * ====================================================================
    * 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.hc.client5.http.examples;
  
  import java.io.IOException;
  import java.nio.CharBuffer;
  import java.util.concurrent.Future;
  
  import org.apache.hc.client5.http.async.methods.AbstractCharResponseConsumer;
  import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
  import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.HttpException;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpResponse;
  import org.apache.hc.core5.http.message.BasicHttpRequest;
  import org.apache.hc.core5.http.message.StatusLine;
  import org.apache.hc.core5.http.nio.support.BasicRequestProducer;
  import org.apache.hc.core5.http.support.BasicRequestBuilder;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.reactor.IOReactorConfig;
  import org.apache.hc.core5.util.Timeout;
  
  /**
   * Example of asynchronous HTTP/1.1 request execution with response streaming.
   */
  public class AsyncClientHttpExchangeStreaming {
  
      public static void main(final String[] args) throws Exception {
  
          final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
                  .setSoTimeout(Timeout.ofSeconds(5))
                  .build();
  
          final CloseableHttpAsyncClient client = HttpAsyncClients.custom()
                  .setIOReactorConfig(ioReactorConfig)
                  .build();
  
          client.start();
  
          final HttpHost target = new HttpHost("httpbin.org");
          final String[] requestUris = new String[] {"/", "/ip", "/user-agent", "/headers"};
  
          for (final String requestUri: requestUris) {
  
              final BasicHttpRequest request = BasicRequestBuilder.get()
                      .setHttpHost(target)
                      .setPath(requestUri)
                      .build();
  
              System.out.println("Executing request " + request);
              final Future<Void> future = client.execute(
                      new BasicRequestProducer(request, null),
                      new AbstractCharResponseConsumer<Void>() {
  
                          @Override
                          protected void start(
                                  final HttpResponse response,
                                  final ContentType contentType) throws HttpException, IOException {
                              System.out.println(request + "->" + new StatusLine(response));
                          }
  
                          @Override
                          protected int capacityIncrement() {
                              return Integer.MAX_VALUE;
                          }
  
                          @Override
                          protected void data(final CharBuffer data, final boolean endOfStream) throws IOException {
                              while (data.hasRemaining()) {
                                  System.out.print(data.get());
                              }
                              if (endOfStream) {
                                  System.out.println();
                              }
                         }
 
                         @Override
                         protected Void buildResult() throws IOException {
                             return null;
                         }
 
                         @Override
                         public void failed(final Exception cause) {
                             System.out.println(request + "->" + cause);
                         }
 
                         @Override
                         public void releaseResources() {
                         }
 
                     }, null);
             future.get();
         }
 
         System.out.println("Shutting down");
         client.close(CloseMode.GRACEFUL);
     }
 
 }