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1
45
46 package org.openejb.loader;
47
48 import org.openejb.loader.ClassPath;
49 import org.openejb.loader.SystemInstance;
50 import org.openejb.util.FileUtils;
51
52 import javax.servlet.ServletException  ;
53 import java.lang.reflect.Method ;
54 import java.lang.reflect.InvocationTargetException ;
55 import java.util.Properties ;
56 import java.io.File ;
57
58
63 public class OpenEJBInstance {
64 private final Class openejb;
65 private final Method init;
66 private final Method isInitialized;
67
68 public OpenEJBInstance() throws Exception {
69 this.openejb = loadOpenEJBClass();
70 this.init = openejb.getMethod("init", new Class []{Properties .class});
71 this.isInitialized = openejb.getMethod("isInitialized", new Class []{});
72 }
73
74 public void init(Properties props) throws Exception {
75 try {
76 init.invoke(null, new Object []{props});
77 } catch (InvocationTargetException e) {
78 throw (Exception ) e.getCause();
79 } catch (Exception e) {
80 throw new RuntimeException ("OpenEJB.init: ", e);
81 }
82 }
83
84 public boolean isInitialized() {
85 try {
86 Boolean b = (Boolean ) isInitialized.invoke(null, new Object []{});
87 return b.booleanValue();
88 } catch (InvocationTargetException e) {
89 throw new RuntimeException ("OpenEJB.isInitialized: ", e.getCause());
90 } catch (Exception e) {
91 throw new RuntimeException ("OpenEJB.isInitialized: ", e);
92 }
93 }
94
95 private Class loadOpenEJBClass() throws Exception {
96 ClassPath classPath = SystemInstance.get().getClassPath();
97 ClassLoader classLoader = classPath.getClassLoader();
98 try {
99 return classLoader.loadClass("org.openejb.OpenEJB");
100 } catch (Exception e) {
101 try {
102 checkOpenEjbHome(SystemInstance.get().getHome().getDirectory());
103 FileUtils home = SystemInstance.get().getHome();
104 classPath.addJarsToPath(home.getDirectory("lib"));
105 } catch (Exception e2) {
106 throw new Exception ("Could not load OpenEJB libraries. Exception: " + e2.getClass().getName() + " " + e2.getMessage());
107 }
108 try {
109 return classLoader.loadClass("org.openejb.OpenEJB");
110 } catch (Exception e2) {
111 throw new Exception ("Could not load OpenEJB class after embedding libraries. Exception: " + e2.getClass().getName() + " " + e2.getMessage());
112 }
113 }
114 }
115 String NO_HOME = "The openejb.home is not set.";
116
117 String BAD_HOME = "Invalid openejb.home: ";
118
119 String NOT_THERE = "The path specified does not exist.";
120
121 String NOT_DIRECTORY = "The path specified is not a directory.";
122
123 String NO_DIST = "The path specified is not correct, it does not contain a 'dist' directory.";
124
125 String NO_LIBS = "The path specified is not correct, it does not contain any OpenEJB libraries.";
126
127 String INSTRUCTIONS = "Please edit the web.xml of the openejb_loader webapp and set the openejb.home init-param to the full path where OpenEJB is installed.";
129
130 private void checkOpenEjbHome(File openejbHome) throws Exception {
131 try {
132
133 String homePath = openejbHome.getAbsolutePath();
134
135 if (!openejbHome.exists())
137 handleError(BAD_HOME + homePath, NOT_THERE, INSTRUCTIONS);
138
139 if (!openejbHome.isDirectory())
141 handleError(BAD_HOME + homePath, NOT_DIRECTORY, INSTRUCTIONS);
142
143 File openejbHomeLibs = new File (openejbHome, "lib");
145 if (!openejbHomeLibs.exists())
146 handleError(BAD_HOME + homePath, NO_DIST, INSTRUCTIONS);
147
148 String [] libs = openejbHomeLibs.list();
151 boolean found = false;
152 for (int i = 0; i < libs.length && !found; i++) {
153 found = (libs[i].startsWith("openejb-") && libs[i].endsWith(".jar"));
154 }
155 if (!found)
156 handleError(BAD_HOME + homePath, NO_LIBS, INSTRUCTIONS);
157
158 } catch (Exception e) {
159 e.printStackTrace();
160 }
161 }
162
163 private void handleError(String m1, String m2, String m3) throws Exception {
164 System.err.println("--[PLEASE FIX]-------------------------------------");
165 System.err.println(m1);
166 System.err.println(m2);
167 System.err.println(m3);
168 System.err.println("---------------------------------------------------");
169 throw new Exception (m1 + " " + m2 + " " + m3);
170 }
171
172 private void handleError(String m1, String m2) throws Exception {
173 System.err.println("--[PLEASE FIX]-------------------------------------");
174 System.err.println(m1);
175 System.err.println(m2);
176 System.err.println("---------------------------------------------------");
177 throw new Exception (m1 + " " + m2);
178 }
179
180 }
181 |
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