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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.http.nio.protocol;
29  
30  import java.io.IOException;
31  
32  import org.apache.http.HttpException;
33  import org.apache.http.HttpRequest;
34  import org.apache.http.annotation.Immutable;
35  import org.apache.http.protocol.HttpContext;
36  import org.apache.http.protocol.HttpRequestHandler;
37  
38  /**
39   * Basic implementation of {@link HttpAsyncRequestHandler} that delegates
40   * the process of request handling to a {@link HttpRequestHandler}. Please note
41   * that this handler buffers request content in memory and should be used for
42   * relatively small request messages.
43   *
44   * @since 4.2
45   */
46  @Immutable
47  public class BasicAsyncRequestHandler implements HttpAsyncRequestHandler<HttpRequest> {
48  
49      private final HttpRequestHandler handler;
50  
51      public BasicAsyncRequestHandler(final HttpRequestHandler handler) {
52          super();
53          if (handler == null) {
54              throw new IllegalArgumentException("Request handler may not be null");
55          }
56          this.handler = handler;
57      }
58  
59      public HttpAsyncRequestConsumer<HttpRequest> processRequest(final HttpRequest request,
60              final HttpContext context) {
61          return new BasicAsyncRequestConsumer();
62      }
63  
64      public void handle(
65              final HttpRequest request,
66              final HttpAsyncExchange httpexchange,
67              final HttpContext context) throws HttpException, IOException {
68          this.handler.handle(request, httpexchange.getResponse(), context);
69          httpexchange.submitResponse();
70      }
71  
72  }