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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  package org.apache.hc.core5.http.nio;
28  
29  import java.io.IOException;
30  
31  import org.apache.hc.core5.http.EntityDetails;
32  import org.apache.hc.core5.http.HttpException;
33  import org.apache.hc.core5.http.HttpRequest;
34  import org.apache.hc.core5.http.protocol.HttpContext;
35  
36  /**
37   * Abstract asynchronous server side message exchange handler that acts as a request consumer
38   * and a response producer.
39   *
40   * @since 5.0
41   */
42  public interface AsyncServerExchangeHandler extends AsyncDataExchangeHandler {
43  
44      /**
45       * Processes the actual HTTP request. The handler can choose to send
46       * response messages immediately inside the call or asynchronously
47       * at some later point.
48       *
49       * @param request the actual request.
50       * @param entityDetails the request entity details or {@code null} if the request
51       *                      does not enclose an entity.
52       * @param responseChannel the response channel.
53       * @param context the actual execution context.
54       */
55      void handleRequest(
56              HttpRequest request,
57              EntityDetails entityDetails,
58              ResponseChannel responseChannel,
59              HttpContext context) throws HttpException, IOException;
60  
61  }