blob: f40d1f62ce836d375ef3130f7c8adf2b2cfd05f6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* 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.tuscany.sca.binding.comet.runtime;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.atmosphere.cpr.AtmosphereServlet;
/**
* This class adds two servlets to the runtime: one exposing all the comet
* services, the other one exposing the javascript toolkit.
*
* Exposing all comet services through a single servlet is needed as browsers
* are undergone by the two http connection limit per domain so all comet
* services should send their responses via the same http connection to a single
* client.
*
* Dispatching to the corresponding endpoint and operation is done internally
* using Jersey RESTful Web Services integration with the AtmosphereServlet.
*
* The Javascript toolkit is not tied to any of the services so it is exposed by
* a separate servlet.
*/
public final class ServletFactory {
/**
* Init-param key for the AtmosphereServlet defining where to look for
* Jersey classes.
*/
private static final String PACKAGE_KEY = "com.sun.jersey.config.property.packages";
/**
* Package of the class handling dispatching to endpoints.
*/
private static final String HANDLER_PACKAGE = "org.apache.tuscany.sca.binding.comet.runtime.handler";
/**
* Package of the class handling Javascript toolkit retrieval.
*/
private static final String JS_PACKAGE = "org.apache.tuscany.sca.binding.comet.runtime.javascript";
/**
* Init-param key for Atmosphere filters.
*/
private static final String FILTERS_KEY = "org.atmosphere.cpr.broadcastFilterClasses";
/**
* Defined filters.
*/
private static final String FILTERS = "org.atmosphere.client.JavascriptClientFilter";
/**
* Path where services will be exposed.
*/
public static final String PATH = "/tuscany-comet/*";
/**
* Path where Javascript toolkit will be exposed.
*/
public static final String JS_PATH = "/tuscany-comet-js/*";
/**
* The servlet that is exposing the comet services.
*/
private static AtmosphereServlet cometServlet = null;
/**
* The servlet that is exposing the Javascript toolkit.
*/
private static AtmosphereServlet javascriptServlet = null;
/**
* Prevent instantiation of singleton class.
*/
private ServletFactory() {
}
/**
* Adds servlets to the underlying servlet host. No need for thread safety
* as calls to this method are sequentially done for each comet endpoint
* found by the runtime.
*
* @param servletHost
* underlying servlet host
* @return uri where servlet has been mapped
*/
public static String registerServlet(final ServletHost servletHost) {
String uri = registerCometServlet(servletHost);
registerJavascriptServlet(servletHost);
return uri;
}
private static String registerCometServlet(ServletHost servletHost) {
if (ServletFactory.cometServlet == null) {
ServletFactory.cometServlet = new AtmosphereServlet();
ServletFactory.cometServlet.addInitParameter(PACKAGE_KEY, HANDLER_PACKAGE);
// ServletFactory.cometServlet.addInitParameter(FILTERS_KEY, FILTERS);
String uri = servletHost.addServletMapping(PATH, cometServlet);
return uri;
}
return null;
}
private static void registerJavascriptServlet(ServletHost servletHost) {
if (ServletFactory.javascriptServlet == null) {
ServletFactory.javascriptServlet = new AtmosphereServlet();
ServletFactory.javascriptServlet.addInitParameter(PACKAGE_KEY, JS_PACKAGE);
servletHost.addServletMapping(JS_PATH, javascriptServlet);
}
}
/**
* Removes servlets from the servlet host.
*
* @param servletHost
* the underlying servlet host.
*/
public static void unregisterServlet(final ServletHost servletHost) {
servletHost.removeServletMapping(PATH);
servletHost.removeServletMapping(JS_PATH);
}
}
|
