%line | %branch | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
org.apache.jcs.auxiliary.remote.server.RemoteCacheStartupServlet |
|
|
1 | package org.apache.jcs.auxiliary.remote.server; |
|
2 | ||
3 | /* |
|
4 | * Licensed to the Apache Software Foundation (ASF) under one |
|
5 | * or more contributor license agreements. See the NOTICE file |
|
6 | * distributed with this work for additional information |
|
7 | * regarding copyright ownership. The ASF licenses this file |
|
8 | * to you under the Apache License, Version 2.0 (the |
|
9 | * "License"); you may not use this file except in compliance |
|
10 | * with the License. You may obtain a copy of the License at |
|
11 | * |
|
12 | * http://www.apache.org/licenses/LICENSE-2.0 |
|
13 | * |
|
14 | * Unless required by applicable law or agreed to in writing, |
|
15 | * software distributed under the License is distributed on an |
|
16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
|
17 | * KIND, either express or implied. See the License for the |
|
18 | * specific language governing permissions and limitations |
|
19 | * under the License. |
|
20 | */ |
|
21 | ||
22 | import java.io.IOException; |
|
23 | import java.io.OutputStream; |
|
24 | import java.net.InetAddress; |
|
25 | import java.net.UnknownHostException; |
|
26 | import java.rmi.RemoteException; |
|
27 | import java.rmi.registry.LocateRegistry; |
|
28 | import java.util.Properties; |
|
29 | ||
30 | import javax.servlet.ServletException; |
|
31 | import javax.servlet.http.HttpServlet; |
|
32 | import javax.servlet.http.HttpServletRequest; |
|
33 | import javax.servlet.http.HttpServletResponse; |
|
34 | ||
35 | import org.apache.commons.logging.Log; |
|
36 | import org.apache.commons.logging.LogFactory; |
|
37 | import org.apache.jcs.engine.control.CompositeCacheManager; |
|
38 | import org.apache.jcs.utils.props.PropertyLoader; |
|
39 | ||
40 | /** |
|
41 | * This servlet can be used to startup the JCS remote cache. It is easy to |
|
42 | * deploy the remote server in a tomcat base. This give you an easy way to |
|
43 | * monitor its activity. |
|
44 | * <p> |
|
45 | * |
|
46 | * <code> |
|
47 | * <servlet> |
|
48 | <servlet-name>JCSRemoteCacheStartupServlet</servlet-name> |
|
49 | <servlet-class> |
|
50 | org.apache.jcs.auxiliary.remote.server.RemoteCacheStartupServlet |
|
51 | </servlet-class> |
|
52 | <load-on-startup>1</load-on-startup> |
|
53 | </servlet> |
|
54 | ||
55 | ||
56 | <servlet-mapping> |
|
57 | <servlet-name>JCSRemoteCacheStartupServlet</servlet-name> |
|
58 | <url-pattern>/jcs</url-pattern> |
|
59 | </servlet-mapping> |
|
60 | * </code> |
|
61 | * |
|
62 | * |
|
63 | * @author Aaron Smuts |
|
64 | * |
|
65 | */ |
|
66 | 0 | public class RemoteCacheStartupServlet |
67 | extends HttpServlet |
|
68 | { |
|
69 | private static final long serialVersionUID = 1L; |
|
70 | ||
71 | 0 | private final static Log log = LogFactory.getLog( RemoteCacheStartupServlet.class ); |
72 | ||
73 | private static final int DEFAULT_REGISTRY_PORT = 1101; |
|
74 | ||
75 | private static final String DEFAULT_PROPS_FILE_NAME = "cache.ccf"; |
|
76 | ||
77 | /** |
|
78 | * Starts the registry and then tries to bind to it. |
|
79 | * <p> |
|
80 | * Gets the port from a props file. Uses the local host name for the rgistry |
|
81 | * host. Tries to start the registry, ignoreing failure. Starts the server. |
|
82 | */ |
|
83 | public void init() |
|
84 | throws ServletException |
|
85 | { |
|
86 | 0 | super.init(); |
87 | // TODO load from props file or get as init param or get from jndi, or |
|
88 | // all three |
|
89 | 0 | int registryPort = DEFAULT_REGISTRY_PORT; |
90 | ||
91 | try |
|
92 | { |
|
93 | 0 | Properties props = PropertyLoader.loadProperties( DEFAULT_PROPS_FILE_NAME ); |
94 | 0 | if ( props != null ) |
95 | { |
|
96 | 0 | String portS = props.getProperty( "registry.port", String.valueOf( DEFAULT_REGISTRY_PORT ) ); |
97 | ||
98 | try |
|
99 | { |
|
100 | 0 | registryPort = Integer.parseInt( portS ); |
101 | } |
|
102 | 0 | catch ( NumberFormatException e ) |
103 | { |
|
104 | 0 | log.error( "Problem converting port to an int.", e ); |
105 | 0 | } |
106 | } |
|
107 | } |
|
108 | 0 | catch ( Exception e ) |
109 | { |
|
110 | 0 | log.error( "Problem loading props.", e ); |
111 | } |
|
112 | 0 | catch ( Throwable t ) |
113 | { |
|
114 | 0 | log.error( "Problem loading props.", t ); |
115 | 0 | } |
116 | ||
117 | // we will always use the local machine for the registry |
|
118 | String registryHost; |
|
119 | try |
|
120 | { |
|
121 | 0 | registryHost = InetAddress.getLocalHost().getHostAddress(); |
122 | ||
123 | 0 | if ( log.isDebugEnabled() ) |
124 | { |
|
125 | 0 | log.debug( "registryHost = [" + registryHost + "]" ); |
126 | } |
|
127 | ||
128 | 0 | if ( "localhost".equals( registryHost ) || "127.0.0.1".equals( registryHost ) ) |
129 | { |
|
130 | 0 | log.warn( "The local address [" + registryHost |
131 | + "] is INVALID. Other machines must be able to use the address to reach this server." ); |
|
132 | } |
|
133 | ||
134 | try |
|
135 | { |
|
136 | 0 | LocateRegistry.createRegistry( registryPort ); |
137 | } |
|
138 | 0 | catch ( RemoteException e ) |
139 | { |
|
140 | 0 | log.error( "Problem creating registry. It may already be started. " + e.getMessage() ); |
141 | } |
|
142 | 0 | catch ( Throwable t ) |
143 | { |
|
144 | 0 | log.error( "Problem creating registry.", t ); |
145 | 0 | } |
146 | ||
147 | try |
|
148 | { |
|
149 | 0 | RemoteCacheServerFactory.startup( registryHost, registryPort, "/" + DEFAULT_PROPS_FILE_NAME ); |
150 | } |
|
151 | 0 | catch ( IOException e ) |
152 | { |
|
153 | 0 | log.error( "Problem starting remote cache server.", e ); |
154 | } |
|
155 | ||
156 | 0 | catch ( Throwable t ) |
157 | { |
|
158 | 0 | log.error( "Problem starting remote cache server.", t ); |
159 | 0 | } |
160 | } |
|
161 | 0 | catch ( UnknownHostException e ) |
162 | { |
|
163 | 0 | log.error( "Could not get local address to use for the registry!", e ); |
164 | 0 | } |
165 | 0 | } |
166 | ||
167 | /** |
|
168 | * It just dumps the stats. |
|
169 | */ |
|
170 | protected void service( HttpServletRequest request, HttpServletResponse response ) |
|
171 | throws ServletException, IOException |
|
172 | { |
|
173 | ||
174 | 0 | String stats = CompositeCacheManager.getInstance().getStats(); |
175 | 0 | if ( log.isInfoEnabled() ) |
176 | { |
|
177 | 0 | log.info( stats ); |
178 | } |
|
179 | ||
180 | try |
|
181 | { |
|
182 | 0 | OutputStream os = response.getOutputStream(); |
183 | 0 | os.write( stats.getBytes() ); |
184 | 0 | os.close(); |
185 | } |
|
186 | 0 | catch ( IOException e ) |
187 | { |
|
188 | 0 | log.error( "Problem writing response.", e ); |
189 | 0 | } |
190 | 0 | } |
191 | ||
192 | /* |
|
193 | * (non-Javadoc) |
|
194 | * |
|
195 | * @see javax.servlet.Servlet#destroy() |
|
196 | */ |
|
197 | public void destroy() |
|
198 | { |
|
199 | 0 | super.destroy(); |
200 | ||
201 | 0 | log.info( "Shutting down remote cache " ); |
202 | ||
203 | 0 | CompositeCacheManager.getInstance().shutDown(); |
204 | 0 | } |
205 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |