Source Code Cross Referenced for ScriptStackTrace.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » java » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.java 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *
023:         *   Free Software Foundation, Inc.
024:         *   59 Temple Place, Suite 330
025:         *   Boston, MA 02111-1307  USA
026:         *
027:         * @author Scott Ferguson
028:         */
029:
030:        package com.caucho.java;
031:
032:        import com.caucho.bytecode.Attribute;
033:        import com.caucho.bytecode.ByteCodeParser;
034:        import com.caucho.bytecode.JavaClass;
035:        import com.caucho.bytecode.OpaqueAttribute;
036:        import com.caucho.loader.SimpleLoader;
037:        import com.caucho.util.L10N;
038:        import com.caucho.util.Log;
039:        import com.caucho.vfs.ReadStream;
040:        import com.caucho.vfs.Vfs;
041:
042:        import java.io.ByteArrayInputStream;
043:        import java.io.IOException;
044:        import java.io.InputStream;
045:        import java.io.PrintWriter;
046:        import java.util.HashMap;
047:        import java.util.WeakHashMap;
048:        import java.util.logging.Level;
049:        import java.util.logging.Logger;
050:
051:        /**
052:         * Prints a stack trace using JSR-45
053:         */
054:        public class ScriptStackTrace {
055:            private static final L10N L = new L10N(ScriptStackTrace.class);
056:            private static final Logger log = Log.open(ScriptStackTrace.class);
057:
058:            private static WeakHashMap<Class, LineMap> _scriptMap = new WeakHashMap<Class, LineMap>();
059:
060:            /**
061:             * Filter a stack trace, replacing names.
062:             */
063:            public static void printStackTrace(Throwable e, PrintWriter out) {
064:                StackTraceElement lastHead = null;
065:
066:                ClassLoader loader = SimpleLoader.create(WorkDir
067:                        .getLocalWorkDir());
068:
069:                while (true) {
070:                    if (e.getMessage() != null)
071:                        out.println(e.getClass().getName() + ": "
072:                                + e.getMessage());
073:                    else
074:                        out.println(e.getClass().getName());
075:
076:                    StackTraceElement[] trace = e.getStackTrace();
077:                    StackTraceElement nextHead = trace.length > 0 ? trace[0]
078:                            : null;
079:
080:                    for (int i = 0; i < trace.length; i++) {
081:                        if (trace[i].equals(lastHead))
082:                            break;
083:
084:                        out.print("\tat ");
085:
086:                        printStackTraceElement(trace[i], out, loader);
087:                    }
088:
089:                    lastHead = nextHead;
090:
091:                    Throwable cause = e.getCause();
092:
093:                    if (cause != null) {
094:                        out.print("Caused by: ");
095:                        e = cause;
096:                    } else
097:                        break;
098:                }
099:            }
100:
101:            /**
102:             * Prints a single stack trace element.
103:             */
104:            private static void printStackTraceElement(StackTraceElement trace,
105:                    PrintWriter out, ClassLoader loader) {
106:                try {
107:                    LineMap map = getScriptLineMap(trace.getClassName(), loader);
108:
109:                    if (map != null) {
110:                        LineMap.Line line = map.getLine(trace.getLineNumber());
111:                        if (line != null) {
112:                            out.print(trace.getClassName() + "."
113:                                    + trace.getMethodName());
114:                            out.print("(" + line.getSourceFilename() + ":");
115:                            out.println(line.getSourceLine(trace
116:                                    .getLineNumber())
117:                                    + ")");
118:                            return;
119:                        }
120:                    }
121:                } catch (Throwable e) {
122:                }
123:
124:                out.println(trace);
125:            }
126:
127:            /**
128:             * Loads the local line map for a class.
129:             */
130:            public static LineMap getScriptLineMap(String className,
131:                    ClassLoader loader) {
132:                try {
133:                    Class cl = loader.loadClass(className);
134:
135:                    LineMap map = _scriptMap.get(cl);
136:
137:                    if (map == null) {
138:                        map = loadScriptMap(cl);
139:                        _scriptMap.put(cl, map);
140:                    }
141:
142:                    return map;
143:                } catch (Throwable e) {
144:                    return null;
145:                }
146:            }
147:
148:            /**
149:             * Loads the script map for a class
150:             */
151:            private static LineMap loadScriptMap(Class cl) {
152:                ClassLoader loader = cl.getClassLoader();
153:
154:                if (loader == null)
155:                    return new LineMap(); // null map
156:
157:                try {
158:                    String pathName = cl.getName().replace('.', '/') + ".class";
159:
160:                    InputStream is = loader.getResourceAsStream(pathName);
161:
162:                    if (is == null)
163:                        return null;
164:
165:                    try {
166:                        JavaClass jClass = new ByteCodeParser().parse(is);
167:
168:                        Attribute attr = jClass
169:                                .getAttribute("SourceDebugExtension");
170:
171:                        if (attr == null) {
172:                            int p = cl.getName().indexOf('$');
173:
174:                            if (p > 0) {
175:                                String className = cl.getName().substring(0, p);
176:
177:                                return loadScriptMap(loader
178:                                        .loadClass(className));
179:                            }
180:
181:                            return new LineMap();
182:                        } else if (attr instanceof  OpaqueAttribute) {
183:                            byte[] value = ((OpaqueAttribute) attr).getValue();
184:
185:                            ByteArrayInputStream bis = new ByteArrayInputStream(
186:                                    value);
187:
188:                            ReadStream rs = Vfs.openRead(bis);
189:                            rs.setEncoding("UTF-8");
190:
191:                            try {
192:                                return parseSmap(rs);
193:                            } finally {
194:                                rs.close();
195:                            }
196:                        } else
197:                            throw new IllegalStateException(L.l(
198:                                    "Expected opaque attribute at '{0}'", attr));
199:                    } finally {
200:                        if (is != null)
201:                            is.close();
202:                    }
203:                } catch (Throwable e) {
204:                    log.log(Level.FINER, e.toString(), e);
205:
206:                    return new LineMap(); // null map
207:                }
208:            }
209:
210:            /**
211:             * Parses the SMAP file.
212:             */
213:            private static LineMap parseSmap(ReadStream is) throws IOException {
214:                String smap = is.readln();
215:
216:                if (!smap.equals("SMAP"))
217:                    throw new IOException(L.l("Illegal header"));
218:
219:                String outputFile = is.readln().trim();
220:                String defaultStratum = is.readln().trim();
221:
222:                String stratum = defaultStratum;
223:                HashMap<String, String> fileMap = new HashMap<String, String>();
224:
225:                LineMap lineMap = new LineMap(outputFile);
226:
227:                loop: while (true) {
228:                    int ch = is.read();
229:
230:                    if (ch < 0)
231:                        break;
232:
233:                    if (ch != '*')
234:                        throw new IOException(L.l("unexpected character '{0}'",
235:                                String.valueOf((char) ch)));
236:
237:                    int code = is.read();
238:                    String value = is.readln();
239:
240:                    switch (code) {
241:                    case 'E':
242:                        break loop;
243:
244:                    case 'S':
245:                        stratum = value.trim();
246:                        break;
247:
248:                    case 'F':
249:                        while ((ch = is.read()) > 0 && ch != '*') {
250:                            if (ch == '+') {
251:                                String first = is.readln().trim();
252:                                String second = is.readln().trim();
253:
254:                                int p = first.indexOf(' ');
255:                                String key = first.substring(0, p);
256:                                String file = first.substring(p + 1).trim();
257:
258:                                if (fileMap.size() == 0)
259:                                    fileMap.put("", second);
260:
261:                                fileMap.put(key, second);
262:                            } else {
263:                                String first = is.readln().trim();
264:
265:                                int p = first.indexOf(' ');
266:                                String key = first.substring(0, p);
267:                                String file = first.substring(p + 1).trim();
268:
269:                                if (fileMap.size() == 0)
270:                                    fileMap.put("", file);
271:
272:                                fileMap.put(key, file);
273:                            }
274:                        }
275:                        if (ch == '*')
276:                            is.unread();
277:                        break;
278:
279:                    case 'L':
280:                        while ((ch = is.read()) != '*' && ch > 0) {
281:                            is.unread();
282:
283:                            String line = is.readln().trim();
284:
285:                            addMap(line, fileMap, lineMap);
286:                        }
287:                        if (ch == '*')
288:                            is.unread();
289:                        break;
290:
291:                    default:
292:                        while ((ch = is.read()) != '*') {
293:                            is.readln();
294:                        }
295:                        if (ch == '*')
296:                            is.unread();
297:                        break;
298:                    }
299:                }
300:
301:                return lineMap;
302:            }
303:
304:            private static void addMap(String line,
305:                    HashMap<String, String> fileMap, LineMap lineMap) {
306:                int colon = line.indexOf(':');
307:
308:                if (colon < 0)
309:                    return;
310:
311:                int hash = line.indexOf('#');
312:                int startLine = 0;
313:                String fileId = "";
314:                int repeatCount = 1;
315:
316:                if (hash < 0)
317:                    startLine = Integer.parseInt(line.substring(0, colon));
318:                else {
319:                    startLine = Integer.parseInt(line.substring(0, hash));
320:
321:                    int comma = line.indexOf(',', hash);
322:
323:                    if (comma > 0 && comma < colon) {
324:                        fileId = line.substring(hash + 1, comma).trim();
325:                        repeatCount = Integer.parseInt(line.substring(
326:                                comma + 1, colon));
327:                    } else
328:                        fileId = line.substring(hash + 1, colon).trim();
329:                }
330:
331:                int outputLine = -1;
332:                int outputIncrement = 1;
333:
334:                int comma = line.indexOf(',', colon);
335:
336:                if (comma > 0) {
337:                    outputLine = Integer.parseInt(line.substring(colon + 1,
338:                            comma));
339:                    outputIncrement = Integer.parseInt(line
340:                            .substring(comma + 1));
341:                } else
342:                    outputLine = Integer.parseInt(line.substring(colon + 1));
343:
344:                String file = fileMap.get(fileId);
345:
346:                lineMap.addLine(startLine, file, repeatCount, outputLine,
347:                        outputIncrement);
348:            }
349:        }
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