content: /*
   * 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.
   */
  package org.apache.camel.component.undertow;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteBuffer;
  import java.nio.channels.Channels;
  import java.nio.channels.ReadableByteChannel;
  
  import io.undertow.client.ClientExchange;
  import io.undertow.client.ClientRequest;
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.apache.camel.util.IOHelper;
  import org.xnio.channels.StreamSinkChannel;
  
  class UndertowStreamingClientCallback extends UndertowClientCallback {
  
      private final InputStream bodyStream;
  
      UndertowStreamingClientCallback(Exchange exchange, AsyncCallback callback,
                                      UndertowEndpoint endpoint, ClientRequest request,
                                      ByteBuffer body) {
          super(exchange, callback, endpoint, request, body);
          this.bodyStream = null;
      }
  
      UndertowStreamingClientCallback(Exchange exchange, AsyncCallback callback,
                                      UndertowEndpoint endpoint, ClientRequest request,
                                      InputStream body) {
          super(exchange, callback, endpoint, request, null);
          this.bodyStream = body;
      }
  
      @Override
      protected void finish(Message result) {
          boolean close = true;
          if (result != null && result.getBody() instanceof InputStream) {
              // no connection closing as streaming continues downstream
              close = false;
          }
          finish(result, close);
      }
  
      @Override
      protected void writeRequest(ClientExchange clientExchange) {
          if (bodyStream == null) {
              super.writeRequest(clientExchange);
              return;
          }
  
          // send request stream
          StreamSinkChannel requestChannel = clientExchange.getRequestChannel();
          try (ReadableByteChannel source = Channels.newChannel(bodyStream)) {
              IOHelper.transfer(source, requestChannel);
              flush(requestChannel);
          } catch (final IOException e) {
              hasFailedWith(e);
          }
      }
  }
  