ActiveIO - 1.0

Clover coverage report - ActiveIO - 1.0 Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT FRAMES NO FRAMES |
file stats: | LOC: | 254 |  | Methods: | 21
| NCLOC: | 178 |  | Classes: | 3
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Source file | Conditionals | Statements | Methods | TOTAL
VMPipeAsynchChannelFactory.java | 38.9% | 76.6% | 85.7% | 72.4% |

1 |  |
     /**
2 |  |
      *
3 |  |
      * Copyright 2004 Hiram Chirino
4 |  |
      *
5 |  |
      * Licensed under the Apache License, Version 2.0 (the "License");
6 |  |
      * you may not use this file except in compliance with the License.
7 |  |
      * You may obtain a copy of the License at
8 |  |
      *
9 |  |
      * http://www.apache.org/licenses/LICENSE-2.0
10 |  |
      *
11 |  |
      * Unless required by applicable law or agreed to in writing, software
12 |  |
      * distributed under the License is distributed on an "AS IS" BASIS,
13 |  |
      * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 |  |
      * See the License for the specific language governing permissions and
15 |  |
      * limitations under the License.
16 |  |
      *
17 |  |
      **/
18 |  |
     package org.activeio.net;
19 |  |
20 |  |
     import java.io.IOException;
21 |  |
     import java.lang.reflect.InvocationHandler;
22 |  |
     import java.lang.reflect.InvocationTargetException;
23 |  |
     import java.lang.reflect.Method;
24 |  |
     import java.lang.reflect.Proxy;
25 |  |
     import java.net.URI;
26 |  |
     import java.util.Collections;
27 |  |
     import java.util.HashMap;
28 |  |
     import java.util.Map;
29 |  |
30 |  |
     import org.activeio.AsynchChannel;
31 |  |
     import org.activeio.AsynchChannelFactory;
32 |  |
     import org.activeio.AsynchChannelListener;
33 |  |
     import org.activeio.AsynchChannelServer;
34 |  |
     import org.activeio.Packet;
35 |  |
36 |  |
     /**
37 |  |
      *
38 |  |
      * @version $Revision$
39 |  |
      */
40 |  |
     final public class VMPipeAsynchChannelFactory implements AsynchChannelFactory {
41 |  |
42 |  |
         //
43 |  |
         // We do all this crazy stuff of looking the server map using System
44 |  |
         // properties
45 |  |
         // because this class could be loaded multiple times in different
46 |  |
         // classloaders.
47 |  |
         //
48 |  |
         private static final String SERVER_MAP_LOCATION = VMPipeAsynchChannelFactory.class.getName() + ".SERVER_MAP";
49 |  |
50 |  |
         private static final Map SERVER_MAP;
51 |  |
         static {
52 | 6 |
             Map m = null;
53 | 6 |
             m = (Map) System.getProperties().get(SERVER_MAP_LOCATION);
54 | 6 |
             if (m == null) {
55 | 6 |
                 m = Collections.synchronizedMap(new HashMap());
56 | 6 |
                 System.getProperties().put(SERVER_MAP_LOCATION, m);
57 |  |
             }
58 | 6 |
             SERVER_MAP = m;
59 |  |
         }
60 |  |
61 |  |
         private final static ClassLoader MY_CLASSLOADER = Packet.class.getClassLoader();
62 |  |
63 |  |
64 |  |
         /**
65 |  |
          * Used to marshal calls to a PipeChannel in a different classloader.
66 |  |
          */
67 |  |
         static public class ClassloaderAsynchChannelAdapter implements AsynchChannel {
68 |  |
69 |  |
             private final ClassLoader cl;
70 |  |
             private final Object channel;
71 |  |
             private final Method writeMethod;
72 |  |
             private final Method setListenerMethod;
73 |  |
             private final Class listenerClazz;
74 |  |
             private final Class packetClazz;
75 |  |
             private final Object listenerProxy;
76 |  |
             private final Method duplicateMethod;
77 |  |
             private final Method startMethod;
78 |  |
             private final Method stopMethod;
79 |  |
             private final Method disposeMethod;
80 |  |
81 |  |
             private AsynchChannelListener channelListener;
82 |  |
83 |  |
             public class ListenerProxyHandler implements InvocationHandler {
84 | 10 |
                 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
85 | 10 |
                     switch (method.getName().length()) {
86 |  |
                     case 8: // onPacket
87 | 4 |
                         Object packet = duplicateMethod.invoke(args[0], new Object[]{MY_CLASSLOADER});
88 | 4 |
                         channelListener.onPacket((Packet) packet);
89 | 4 |
                         break;
90 |  |
                     case 13: // onPacketError
91 | 6 |
                         channelListener.onPacketError((IOException) args[0]);
92 | 6 |
                         break;
93 |  |
                     default:
94 | 0 |
                         channelListener.onPacketError(new IOException("Unknown proxy method invocation: "+method.getName()));
95 |  |
                     }
96 | 10 |
                     return null;
97 |  |
                 }
98 |  |
             }
99 |  |
100 | 6 |
             public ClassloaderAsynchChannelAdapter(Object channel) throws SecurityException, NoSuchMethodException,
101 |  |
                     ClassNotFoundException {
102 | 6 |
                 this.channel = channel;
103 | 6 |
                 Class clazz = channel.getClass();
104 | 6 |
                 cl = clazz.getClassLoader();
105 |  |
106 | 6 |
                 listenerClazz = cl.loadClass(AsynchChannelListener.class.getName());
107 | 6 |
                 packetClazz = cl.loadClass(Packet.class.getName());
108 | 6 |
                 writeMethod = clazz.getMethod("write", new Class[] { packetClazz });
109 | 6 |
                 startMethod = clazz.getMethod("start", new Class[] { });
110 | 6 |
                 stopMethod = clazz.getMethod("stop", new Class[] { long.class });
111 | 6 |
                 disposeMethod = clazz.getMethod("dispose", new Class[] { });
112 |  |
113 | 6 |
                 setListenerMethod = clazz.getMethod("setAsynchChannelListener", new Class[] { listenerClazz });
114 | 6 |
                 duplicateMethod = packetClazz.getMethod("duplicate", new Class[] { ClassLoader.class });
115 |  |
116 | 6 |
                 ListenerProxyHandler handler = new ListenerProxyHandler();
117 | 6 |
                 listenerProxy = Proxy.newProxyInstance(cl, new Class[] { listenerClazz }, handler);
118 |  |
             }
119 |  |
120 | 2004 |
             public void write(Packet packet) throws IOException {
121 | 2004 |
                 callIOExceptionMethod(writeMethod, new Object[] { packet.duplicate(cl) });
122 |  |
             }
123 |  |
124 | 6 |
             public void setAsynchChannelListener(AsynchChannelListener channelListener) {
125 | 6 |
                 this.channelListener = channelListener;
126 | 6 |
                 callMethod(setListenerMethod, new Object[] { channelListener == null ? null : listenerProxy });
127 |  |
             }
128 |  |
129 | 0 |
             public AsynchChannelListener getAsynchChannelListener() {
130 | 0 |
                 return channelListener;
131 |  |
             }
132 |  |
133 | 8 |
             public void dispose() {
134 | 8 |
                 callMethod(disposeMethod, new Object[] { });
135 |  |
             }
136 |  |
137 | 6 |
             public void start() throws IOException {
138 | 6 |
                 callIOExceptionMethod(startMethod, new Object[] {});
139 |  |
             }
140 |  |
141 | 0 |
             public void stop(long timeout) throws IOException {
142 | 0 |
                 callIOExceptionMethod(stopMethod, new Object[] {new Long(timeout)});
143 |  |
             }
144 |  |
145 | 14 |
             private void callMethod(Method method, Object[] args) {
146 | 14 |
                 try {
147 | 14 |
                     method.invoke(channel, args);
148 |  |
                 } catch (InvocationTargetException e) {
149 | 0 |
                     if (e.getTargetException() instanceof RuntimeException) {
150 | 0 |
                         throw (RuntimeException) e.getTargetException();
151 |  |
                     }
152 | 0 |
                     throw new RuntimeException(e.getTargetException());
153 |  |
                 } catch (Throwable e) {
154 | 0 |
                     throw new RuntimeException("Reflexive invocation failed: " + e, e);
155 |  |
                 }
156 |  |
             }
157 |  |
158 | 2010 |
             private void callIOExceptionMethod(Method method, Object[] args) throws IOException {
159 | 2010 |
                 try {
160 | 2010 |
                     method.invoke(channel, args);
161 |  |
                 } catch (InvocationTargetException e) {
162 | 0 |
                     if (e.getTargetException() instanceof IOException) {
163 | 0 |
                         throw (IOException) e.getTargetException();
164 |  |
                     }
165 | 0 |
                     if (e.getTargetException() instanceof RuntimeException) {
166 | 0 |
                         throw (RuntimeException) e.getTargetException();
167 |  |
                     }
168 | 0 |
                     throw new RuntimeException(e.getTargetException());
169 |  |
                 } catch (Throwable e) {
170 | 0 |
                     throw (IOException) new IOException("Reflexive invocation failed: " + e).initCause(e);
171 |  |
                 }
172 |  |
             }
173 |  |
174 |  |
             //
175 |  |
             // The following methods do not need to delegate since they
176 |  |
             // are implemented as noops in the PipeChannel
177 |  |
             //
178 | 6 |
             public Object narrow(Class target) {
179 | 6 |
                 if (target.isAssignableFrom(getClass())) {
180 | 0 |
                     return this;
181 |  |
                 }
182 | 6 |
                 return null;
183 |  |
             }
184 |  |
185 | 2003 |
             public void flush() throws IOException {
186 |  |
             }
187 |  |
188 |  |
         }
189 |  |
190 |  |
         private boolean forceRefelection;
191 |  |
192 | 16 |
         public AsynchChannel openAsynchChannel(URI location) throws IOException {
193 |  |
194 | 16 |
             Object server = lookupServer(location);
195 | 16 |
             if (!forceRefelection && server.getClass() == VMPipeAsynchChannelServer.class) {
196 | 10 |
                 return ((VMPipeAsynchChannelServer) server).connect();
197 |  |
             }
198 |  |
199 |  |
             // Asume server is in a different classloader.
200 |  |
             // Use reflection to connect.
201 | 6 |
             try {
202 | 6 |
                 Method method = server.getClass().getMethod("connect", new Class[] {});
203 | 6 |
                 Object channel = method.invoke(server, new Object[] {});
204 | 6 |
                 return new ClassloaderAsynchChannelAdapter(channel);
205 |  |
             } catch (Throwable e) {
206 | 0 |
                 throw (IOException) new IOException("Connection could not be established: " + e).initCause(e);
207 |  |
             }
208 |  |
         }
209 |  |
210 | 16 |
         public AsynchChannelServer bindAsynchChannel(URI bindURI) throws IOException {
211 | 16 |
             VMPipeAsynchChannelServer server = new VMPipeAsynchChannelServer(bindURI);
212 | 16 |
             bindServer(bindURI, server);
213 | 16 |
             return server;
214 |  |
         }
215 |  |
216 | 64 |
         private static Map getServerMap() {
217 | 64 |
             return SERVER_MAP;
218 |  |
         }
219 |  |
220 | 48 |
         static public String getServerKeyForURI(URI location) {
221 | 48 |
             return location.getHost();
222 |  |
         }
223 |  |
224 | 16 |
         public static void bindServer(URI bindURI, VMPipeAsynchChannelServer server) throws IOException {
225 | 16 |
             String key = getServerKeyForURI(bindURI);
226 | 16 |
             if (getServerMap().get(key) != null)
227 | 0 |
                 throw new IOException("Server is allready bound at: " + bindURI);
228 | 16 |
             getServerMap().put(key, server);
229 |  |
         }
230 |  |
231 | 16 |
         public static Object lookupServer(URI location) throws IOException {
232 | 16 |
             String key = getServerKeyForURI(location);
233 | 16 |
             Object server = getServerMap().get(key);
234 | 16 |
             if (server == null) {
235 | 0 |
                 throw new IOException("Connection refused.");
236 |  |
             }
237 | 16 |
             return server;
238 |  |
         }
239 |  |
240 | 16 |
         public static void unbindServer(URI bindURI) {
241 | 16 |
             String key = getServerKeyForURI(bindURI);
242 | 16 |
             getServerMap().remove(key);
243 |  |
         }
244 |  |
245 | 0 |
         public boolean isForceRefelection() {
246 | 0 |
             return forceRefelection;
247 |  |
         }
248 |  |
249 | 12 |
         public void setForceRefelection(boolean forceRefelection) {
250 | 12 |
             this.forceRefelection = forceRefelection;
251 |  |
         }
252 |  |
253 |  |
     }
254 |  |