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1
8 package org.apache.avalon.phoenix.launcher;
9
10 import java.io.File  ;
11 import java.lang.reflect.Method ;
12 import java.net.URL ;
13 import java.net.URLClassLoader ;
14 import java.security.CodeSource ;
15 import java.security.PermissionCollection ;
16 import java.security.Permissions ;
17 import java.security.Policy ;
18 import java.util.ArrayList ;
19 import java.util.Map ;
20 import java.util.StringTokenizer ;
21 import java.util.HashMap ;
22
23
29 public final class Main
30 {
31 private static final String MAIN_CLASS =
32 "org.apache.avalon.phoenix.frontends.CLIMain";
33 private static final String LOADER_JAR = "phoenix-loader.jar";
34
35 private static Object c_frontend;
36
37
43 public static final void main( final String [] args )
44 throws Exception
45 {
46 final int exitCode =
47 startup( args, new HashMap (), true );
48 System.exit( exitCode );
49 }
50
51
64 protected static final int startup( final String [] args,
65 final Map data,
66 final boolean blocking )
67 throws Exception
68 {
69 int exitCode;
70 try
71 {
72 Policy.setPolicy( new FreeNEasyPolicy() );
74
75 final URL [] urls = getEngineClassPath();
77 final URLClassLoader classLoader = new URLClassLoader ( urls );
78
79 data.put( "common.classloader", ClassLoader.getSystemClassLoader() );
80 data.put( "container.classloader", classLoader );
81 data.put( "phoenix.home", new File ( findPhoenixHome() ) );
82
83 Thread.currentThread().setContextClassLoader( classLoader );
85
86 final Class clazz = classLoader.loadClass( MAIN_CLASS );
88 final Class [] paramTypes =
89 new Class []{args.getClass(), Map .class, Boolean.TYPE};
90 final Method method = clazz.getMethod( "main", paramTypes );
91 c_frontend = clazz.newInstance();
92
93 final Integer integer = (Integer )method.invoke(
95 c_frontend, new Object []{args, data, new Boolean ( blocking )} );
96 exitCode = integer.intValue();
97 }
98 catch( final Exception e )
99 {
100 e.printStackTrace();
101 exitCode = 1;
102 }
103 return exitCode;
104 }
105
106
111 protected static final void shutdown()
112 {
113 if( null == c_frontend )
114 {
115 return;
116 }
117
118 try
119 {
120 final Class clazz = c_frontend.getClass();
121 final Method method = clazz.getMethod( "shutdown", new Class [ 0 ] );
122
123 method.invoke( c_frontend, new Object [ 0 ] );
125 }
126 catch( final Exception e )
127 {
128 e.printStackTrace();
129 }
130 finally
131 {
132 c_frontend = null;
133 }
134 }
135
136
142 private static URL [] getEngineClassPath()
143 throws Exception
144 {
145 final ArrayList urls = new ArrayList ();
146
147 final File dir = findEngineLibDir();
148 final File [] files = dir.listFiles();
149 for( int i = 0; i < files.length; i++ )
150 {
151 final File file = files[ i ];
152 if( file.getName().endsWith( ".jar" ) )
153 {
154 urls.add( file.toURL() );
155 }
156 }
157
158 return (URL [])urls.toArray( new URL [ urls.size() ] );
159 }
160
161
167 private static File findEngineLibDir()
168 throws Exception
169 {
170 final String phoenixHome = findPhoenixHome();
171 final String engineLibDir =
172 phoenixHome + File.separator + "bin" + File.separator + "lib";
173 final File dir = new File ( engineLibDir ).getCanonicalFile();
174 if( !dir.exists() )
175 {
176 throw new Exception ( "Unable to locate engine lib directory at " + engineLibDir );
177 }
178 return dir;
179 }
180
181
189 private static String findPhoenixHome()
190 throws Exception
191 {
192 String phoenixHome = System.getProperty( "phoenix.home", null );
193 if( null == phoenixHome )
194 {
195 final File loaderDir = findLoaderDir();
196 phoenixHome = loaderDir.getAbsoluteFile().getParentFile() + File.separator;
197 }
198
199 phoenixHome = (new File ( phoenixHome )).getCanonicalFile().toString();
200 System.setProperty( "phoenix.home", phoenixHome );
201 return phoenixHome;
202 }
203
204
207 private static final File findLoaderDir()
208 throws Exception
209 {
210 final String classpath = System.getProperty( "java.class.path" );
211 final String pathSeparator = System.getProperty( "path.separator" );
212 final StringTokenizer tokenizer = new StringTokenizer ( classpath, pathSeparator );
213
214 while( tokenizer.hasMoreTokens() )
215 {
216 final String element = tokenizer.nextToken();
217
218 if( element.endsWith( LOADER_JAR ) )
219 {
220 File file = (new File ( element )).getCanonicalFile();
221 file = file.getParentFile();
222 return file;
223 }
224 }
225
226 throw new Exception ( "Unable to locate " + LOADER_JAR + " in classpath" );
227 }
228
229
233 private static class FreeNEasyPolicy
234 extends Policy
235 {
236 public PermissionCollection getPermissions( final CodeSource codeSource )
237 {
238 final Permissions permissions = new Permissions ();
239 permissions.add( new java.security.AllPermission () );
240 return permissions;
241 }
242
243 public void refresh()
244 {
245 }
246 }
247 }
248 |
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