Source Code Cross Referenced for CachedClassLoader.java in  » ERP-CRM-Financial » SourceTap-CRM » org » ofbiz » base » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » SourceTap CRM » org.ofbiz.base.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: CachedClassLoader.java,v 1.4 2003/11/11 18:19:35 ajzeneski Exp $
003:         *
004:         * Copyright (c) 2003 The Open For Business Project - www.ofbiz.org
005:         *
006:         * Permission is hereby granted, free of charge, to any person obtaining a
007:         * copy of this software and associated documentation files (the "Software"),
008:         * to deal in the Software without restriction, including without limitation
009:         * the rights to use, copy, modify, merge, publish, distribute, sublicense,
010:         * and/or sell copies of the Software, and to permit persons to whom the
011:         * Software is furnished to do so, subject to the following conditions:
012:         *
013:         * The above copyright notice and this permission notice shall be included
014:         * in all copies or substantial portions of the Software.
015:         *
016:         * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
017:         * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
018:         * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
019:         * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
020:         * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
021:         * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
022:         * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
023:         */
024:        package org.ofbiz.base.util;
025:
026:        import java.net.URL;
027:        import java.net.URLClassLoader;
028:        import java.util.HashMap;
029:        import java.util.HashSet;
030:        import java.util.Map;
031:
032:        /**
033:         * Caching Class Loader
034:         *
035:         * @author     <a href="mailto:jonesde@ofbiz.org">David E. Jones</a>
036:         * @version    $Revision: 1.4 $
037:         * @since      2.1
038:         */
039:        public class CachedClassLoader extends URLClassLoader {
040:
041:            public static final String module = CachedClassLoader.class
042:                    .getName();
043:
044:            private String contextName;
045:
046:            public static Map globalClassNameClassMap = new HashMap();
047:            public static HashSet globalBadClassNameSet = new HashSet();
048:
049:            public Map localClassNameClassMap = new HashMap();
050:            public HashSet localBadClassNameSet = new HashSet();
051:
052:            public static Map globalResourceMap = new HashMap();
053:            public static HashSet globalBadResourceNameSet = new HashSet();
054:
055:            public Map localResourceMap = new HashMap();
056:            public HashSet localBadResourceNameSet = new HashSet();
057:
058:            static {
059:                // setup some commonly used classes...
060:                globalClassNameClassMap.put("Object", java.lang.Object.class);
061:                globalClassNameClassMap.put("java.lang.Object",
062:                        java.lang.Object.class);
063:
064:                globalClassNameClassMap.put("String", java.lang.String.class);
065:                globalClassNameClassMap.put("java.lang.String",
066:                        java.lang.String.class);
067:
068:                globalClassNameClassMap.put("Boolean", java.lang.Boolean.class);
069:                globalClassNameClassMap.put("java.lang.Boolean",
070:                        java.lang.Boolean.class);
071:
072:                globalClassNameClassMap.put("Double", java.lang.Double.class);
073:                globalClassNameClassMap.put("java.lang.Double",
074:                        java.lang.Double.class);
075:                globalClassNameClassMap.put("Float", java.lang.Float.class);
076:                globalClassNameClassMap.put("java.lang.Float",
077:                        java.lang.Float.class);
078:                globalClassNameClassMap.put("Long", java.lang.Long.class);
079:                globalClassNameClassMap.put("java.lang.Long",
080:                        java.lang.Long.class);
081:                globalClassNameClassMap.put("Integer", java.lang.Integer.class);
082:                globalClassNameClassMap.put("java.lang.Integer",
083:                        java.lang.Integer.class);
084:
085:                globalClassNameClassMap.put("Timestamp",
086:                        java.sql.Timestamp.class);
087:                globalClassNameClassMap.put("java.sql.Timestamp",
088:                        java.sql.Timestamp.class);
089:                globalClassNameClassMap.put("Time", java.sql.Time.class);
090:                globalClassNameClassMap.put("java.sql.Time",
091:                        java.sql.Time.class);
092:                globalClassNameClassMap.put("Date", java.sql.Date.class);
093:                globalClassNameClassMap.put("java.sql.Date",
094:                        java.sql.Date.class);
095:
096:                globalClassNameClassMap.put("Locale", java.util.Locale.class);
097:                globalClassNameClassMap.put("java.util.Locale",
098:                        java.util.Locale.class);
099:
100:                globalClassNameClassMap.put("java.util.Date",
101:                        java.util.Date.class);
102:                globalClassNameClassMap.put("Collection",
103:                        java.util.Collection.class);
104:                globalClassNameClassMap.put("java.util.Collection",
105:                        java.util.Collection.class);
106:                globalClassNameClassMap.put("List", java.util.List.class);
107:                globalClassNameClassMap.put("java.util.List",
108:                        java.util.List.class);
109:                globalClassNameClassMap.put("Set", java.util.Set.class);
110:                globalClassNameClassMap.put("java.util.Set",
111:                        java.util.Set.class);
112:                globalClassNameClassMap.put("Map", java.util.Map.class);
113:                globalClassNameClassMap.put("java.util.Map",
114:                        java.util.Map.class);
115:                globalClassNameClassMap.put("HashMap", java.util.HashMap.class);
116:                globalClassNameClassMap.put("java.util.HashMap",
117:                        java.util.HashMap.class);
118:
119:                try {
120:                    ClassLoader loader = Thread.currentThread()
121:                            .getContextClassLoader();
122:
123:                    // note: loadClass is necessary for these since this class doesn't know anything about the Entity Engine at compile time
124:                    globalClassNameClassMap.put("GenericValue", loader
125:                            .loadClass("org.ofbiz.entity.GenericValue"));
126:                    globalClassNameClassMap
127:                            .put("org.ofbiz.entity.GenericValue", loader
128:                                    .loadClass("org.ofbiz.entity.GenericValue"));
129:                    globalClassNameClassMap.put("GenericPK", loader
130:                            .loadClass("org.ofbiz.entity.GenericPK"));
131:                    globalClassNameClassMap.put("org.ofbiz.entity.GenericPK",
132:                            loader.loadClass("org.ofbiz.entity.GenericPK"));
133:                    globalClassNameClassMap.put("GenericEntity", loader
134:                            .loadClass("org.ofbiz.entity.GenericEntity"));
135:                    globalClassNameClassMap.put(
136:                            "org.ofbiz.entity.GenericEntity",
137:                            loader.loadClass("org.ofbiz.entity.GenericEntity"));
138:                } catch (ClassNotFoundException e) {
139:                    Debug
140:                            .logError(
141:                                    e,
142:                                    "Could not pre-initialize dynamically loaded class: ",
143:                                    module);
144:                }
145:            }
146:
147:            public CachedClassLoader(URL[] url, ClassLoader parent,
148:                    String contextName) {
149:                super (url, parent);
150:                this .contextName = contextName;
151:                if (Debug.verboseOn()) {
152:                    Package[] paks = this .getPackages();
153:                    StringBuffer pakList = new StringBuffer();
154:                    for (int i = 0; i < paks.length; i++) {
155:                        pakList.append(paks[i].getName());
156:                        if (i < (paks.length - 1)) {
157:                            pakList.append(":");
158:                        }
159:                    }
160:                    Debug.logVerbose("Cached ClassLoader Packages : "
161:                            + pakList.toString(), module);
162:                }
163:            }
164:
165:            public CachedClassLoader(ClassLoader parent, String contextName) {
166:                this (new URL[0], parent, contextName);
167:            }
168:
169:            public CachedClassLoader(URL[] url, ClassLoader parent) {
170:                this (url, parent, "__globalContext");
171:            }
172:
173:            public String toString() {
174:                return "org.ofbiz.base.util.CachedClassLoader(" + contextName
175:                        + ") / " + getParent().toString();
176:            }
177:
178:            public Class loadClass(String name) throws ClassNotFoundException {
179:                return loadClass(name, false);
180:            }
181:
182:            protected Class loadClass(String name, boolean resolve)
183:                    throws ClassNotFoundException {
184:                //check glocal common classes, ie for all instances
185:                Class theClass = (Class) globalClassNameClassMap.get(name);
186:
187:                //check local classes, ie for this instance
188:                if (theClass == null)
189:                    theClass = (Class) localClassNameClassMap.get(name);
190:
191:                //make sure it is not a known bad class name
192:                if (theClass == null) {
193:                    if (localBadClassNameSet.contains(name)
194:                            || globalBadClassNameSet.contains(name)) {
195:                        if (Debug.verboseOn())
196:                            Debug.logVerbose(
197:                                    "Cached loader got a known bad class name: ["
198:                                            + name + "]", module);
199:                        throw new ClassNotFoundException(
200:                                "Cached loader got a known bad class name: "
201:                                        + name);
202:                    }
203:                }
204:
205:                if (theClass == null) {
206:                    if (Debug.verboseOn())
207:                        Debug.logVerbose(
208:                                "Cached loader cache miss for class name: ["
209:                                        + name + "]", module);
210:
211:                    synchronized (this ) {
212:                        theClass = (Class) localClassNameClassMap.get(name);
213:                        if (theClass == null) {
214:                            try {
215:                                theClass = super .loadClass(name, resolve);
216:                                if (isGlobalPath(name)) {
217:                                    globalClassNameClassMap.put(name, theClass);
218:                                } else {
219:                                    localClassNameClassMap.put(name, theClass);
220:                                }
221:                            } catch (ClassNotFoundException e) {
222:                                //Debug.logInfo(e, module);
223:                                if (Debug.verboseOn())
224:                                    Debug.logVerbose(
225:                                            "Remembering invalid class name: ["
226:                                                    + name + "]", module);
227:                                if (isGlobalPath(name)) {
228:                                    globalBadClassNameSet.add(name);
229:                                } else {
230:                                    localBadClassNameSet.add(name);
231:                                }
232:                                throw e;
233:                            }
234:                        }
235:                    }
236:                }
237:                return theClass;
238:            }
239:
240:            public URL getResource(String name) {
241:                //check glocal common resources, ie for all instances
242:                URL theResource = (URL) globalResourceMap.get(name);
243:
244:                //check local resources, ie for this instance
245:                if (theResource == null)
246:                    theResource = (URL) localResourceMap.get(name);
247:
248:                //make sure it is not a known bad resource name
249:                if (theResource == null) {
250:                    if (localBadResourceNameSet.contains(name)
251:                            || globalBadResourceNameSet.contains(name)) {
252:                        if (Debug.verboseOn())
253:                            Debug.logVerbose(
254:                                    "Cached loader got a known bad resource name: ["
255:                                            + name + "]", module);
256:                        return null;
257:                    }
258:                }
259:
260:                if (theResource == null) {
261:                    if (Debug.verboseOn())
262:                        Debug.logVerbose(
263:                                "Cached loader cache miss for resource name: ["
264:                                        + name + "]", module);
265:                    //Debug.logInfo("Cached loader cache miss for resource name: [" + name + "]", module);
266:
267:                    synchronized (this ) {
268:                        theResource = (URL) localResourceMap.get(name);
269:                        if (theResource == null) {
270:                            theResource = super .getResource(name);
271:                            if (theResource == null) {
272:                                if (Debug.verboseOn())
273:                                    Debug.logVerbose(
274:                                            "Remembering invalid resource name: ["
275:                                                    + name + "]", module);
276:                                //Debug.logInfo("Remembering invalid resource name: [" + name + "]", module);
277:                                if (isGlobalPath(name)) {
278:                                    globalBadResourceNameSet.add(name);
279:                                } else {
280:                                    localBadResourceNameSet.add(name);
281:                                }
282:                            } else {
283:                                if (isGlobalPath(name)) {
284:                                    globalResourceMap.put(name, theResource);
285:                                } else {
286:                                    localResourceMap.put(name, theResource);
287:                                }
288:                            }
289:                        }
290:                    }
291:                }
292:                return theResource;
293:            }
294:
295:            protected boolean isGlobalPath(String name) {
296:                if (name.startsWith("java.") || name.startsWith("java/")
297:                        || name.startsWith("/java/"))
298:                    return true;
299:                if (name.startsWith("javax.") || name.startsWith("javax/")
300:                        || name.startsWith("/javax/"))
301:                    return true;
302:                if (name.startsWith("sun.") || name.startsWith("sun/")
303:                        || name.startsWith("/sun/"))
304:                    return true;
305:                if (name.startsWith("org.ofbiz."))
306:                    return true;
307:                return false;
308:            }
309:        }
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