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.io;
28
29 import java.io.IOException;
30
31 import org.apache.hc.core5.annotation.Contract;
32 import org.apache.hc.core5.annotation.ThreadingBehavior;
33 import org.apache.hc.core5.http.ClassicHttpRequest;
34 import org.apache.hc.core5.http.ClassicHttpResponse;
35 import org.apache.hc.core5.http.HttpException;
36 import org.apache.hc.core5.http.protocol.HttpContext;
37
38 /**
39 * HttpFilterChain represents a single element in the server side request processing chain.
40 *
41 * @since 5.0
42 */
43 @Contract(threading = ThreadingBehavior.STATELESS)
44 public interface HttpFilterChain {
45
46 /**
47 * Response trigger that can be used to generate the final HTTP response
48 * and terminate HTTP request processing.
49 */
50 interface ResponseTrigger {
51
52 /**
53 * Sends an intermediate informational HTTP response to the client.
54 *
55 * @param response an intermediate (1xx) HTTP response.
56 */
57 void sendInformation(ClassicHttpResponse response) throws HttpException, IOException;
58
59 /**
60 * Sends a final HTTP response to the client.
61 *
62 * @param response a final (non 1xx) HTTP response.
63 */
64 void submitResponse(ClassicHttpResponse response) throws HttpException, IOException;
65
66 }
67
68 /**
69 * Proceeds to the next element in the request processing chain.
70 *
71 * @param request the actual request.
72 * @param responseTrigger the response trigger.
73 * @param context the actual execution context.
74 */
75 void proceed(
76 ClassicHttpRequest request,
77 ResponseTrigger responseTrigger,
78 HttpContext context) throws HttpException, IOException;
79
80 }