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.util.Map;
31
32 import org.apache.http.annotation.ThreadSafe;
33 import org.apache.http.protocol.UriPatternMatcher;
34
35 /**
36 * Maintains a map of HTTP request handlers keyed by a request URI pattern.
37 * <br>
38 * Patterns may have three formats:
39 * <ul>
40 * <li><code>*</code></li>
41 * <li><code>*<uri></code></li>
42 * <li><code><uri>*</code></li>
43 * </ul>
44 * <br>
45 * This class can be used to resolve an instance of {@link HttpAsyncRequestHandler}
46 * matching a particular request URI. Usually the resolved request handler
47 * will be used to process the request with the specified request URI.
48 *
49 * @since 4.2
50 */
51 @ThreadSafe
52 public class HttpAsyncRequestHandlerRegistry implements HttpAsyncRequestHandlerResolver {
53
54 private final UriPatternMatcher<HttpAsyncRequestHandler<?>> matcher;
55
56 public HttpAsyncRequestHandlerRegistry() {
57 matcher = new UriPatternMatcher<HttpAsyncRequestHandler<?>>();
58 }
59
60 /**
61 * Registers the given {@link NHttpRequestHandler} as a handler for URIs
62 * matching the given pattern.
63 *
64 * @param pattern the pattern to register the handler for.
65 * @param handler the handler.
66 */
67 public void register(final String pattern, final HttpAsyncRequestHandler<?> handler) {
68 matcher.register(pattern, handler);
69 }
70
71 /**
72 * Removes registered handler, if exists, for the given pattern.
73 *
74 * @param pattern the pattern to unregister the handler for.
75 */
76 public void unregister(final String pattern) {
77 matcher.unregister(pattern);
78 }
79
80 /**
81 * Sets handlers from the given map.
82 * @param map the map containing handlers keyed by their URI patterns.
83 */
84 public void setHandlers(final Map<String, HttpAsyncRequestHandler<?>> map) {
85 matcher.setObjects(map);
86 }
87
88 /**
89 * Get the handler map.
90 * @return The map of handlers and their associated URI patterns.
91 */
92 public Map<String, HttpAsyncRequestHandler<?>> getHandlers() {
93 return matcher.getObjects();
94 }
95
96 public HttpAsyncRequestHandler<?> lookup(String requestURI) {
97 return matcher.lookup(requestURI);
98 }
99
100 }