Source Code Cross Referenced for LogMgr.java in  » Database-Client » SQL-Workbench » workbench » log » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » SQL Workbench » workbench.log 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * LogMgr.java
003:         *
004:         * This file is part of SQL Workbench/J, http://www.sql-workbench.net
005:         *
006:         * Copyright 2002-2008, Thomas Kellerer
007:         * No part of this code maybe reused without the permission of the author
008:         *
009:         * To contact the author please send an email to: support@sql-workbench.net
010:         *
011:         */
012:        package workbench.log;
013:
014:        import java.io.File;
015:        import java.io.FileOutputStream;
016:        import java.io.PrintStream;
017:        import java.io.PrintWriter;
018:        import java.io.StringWriter;
019:        import java.sql.SQLException;
020:        import java.text.SimpleDateFormat;
021:        import java.util.ArrayList;
022:        import java.util.Date;
023:        import java.util.List;
024:        import java.util.regex.Matcher;
025:        import java.util.regex.Pattern;
026:
027:        import workbench.util.ExceptionUtil;
028:        import workbench.util.StrBuffer;
029:        import workbench.util.StringUtil;
030:
031:        /**
032:         * @author  support@sql-workbench.net
033:         */
034:        public class LogMgr {
035:
036:            public static final String ERROR = "ERROR";
037:            public static final String WARNING = "WARN";
038:            public static final String INFO = "INFO";
039:            public static final String DEBUG = "DEBUG";
040:
041:            private static final String WARNING_DISPLAY = "WARN ";
042:            private static final String INFO_DISPLAY = "INFO ";
043:
044:            public static final List<String> LEVELS;
045:            static {
046:                LEVELS = new ArrayList<String>(4);
047:                LEVELS.add(ERROR);
048:                LEVELS.add(WARNING);
049:                LEVELS.add(INFO);
050:                LEVELS.add(DEBUG);
051:            }
052:
053:            private static PrintStream logOut = null;
054:            private static final Date theDate = new Date();
055:            private static boolean logSystemErr = false;
056:
057:            private static int typeIndex = -1;
058:            private static int timeIndex = -1;
059:            private static int sourceIndex = -1;
060:            private static int messageIndex = 0;
061:            private static int exceptionMsgIndex = 1;
062:            private static boolean showStackTrace = false;
063:            private static final int NUM_ELEMENTS = 5;
064:            private static String[] MSG_ELEMENTS = new String[NUM_ELEMENTS];
065:
066:            private static SimpleDateFormat formatter = new SimpleDateFormat(
067:                    "dd.MM.yyyy HH:mm:ss");
068:
069:            private static int loglevel = 3;
070:
071:            private static int levelDebug;
072:            private static int levelWarning;
073:            private static int levelInfo;
074:            private static int levelError;
075:            private static boolean debugEnabled;
076:            private static boolean infoEnabled;
077:            private static File currentFile;
078:
079:            public static void setMessageFormat(String aFormat) {
080:                if (aFormat == null)
081:                    return;
082:                Pattern p = Pattern.compile("\\{[a-zA-Z]+\\}");
083:                Matcher m = p.matcher(aFormat);
084:
085:                typeIndex = -1;
086:                timeIndex = -1;
087:                sourceIndex = -1;
088:                messageIndex = -1;
089:                exceptionMsgIndex = -1;
090:                showStackTrace = false;
091:
092:                int currentIndex = 0;
093:                while (m.find()) {
094:                    int start = m.start();
095:                    int end = m.end();
096:                    String key = aFormat.substring(start, end).toLowerCase();
097:                    if ("{type}".equals(key)) {
098:                        typeIndex = currentIndex;
099:                        currentIndex++;
100:                    } else if ("{timestamp}".equals(key)) {
101:                        timeIndex = currentIndex;
102:                        currentIndex++;
103:                    } else if ("{source}".equals(key)) {
104:                        sourceIndex = currentIndex;
105:                        currentIndex++;
106:                    } else if ("{message}".equals(key)) {
107:                        messageIndex = currentIndex;
108:                        currentIndex++;
109:                    } else if ("{error}".equals(key)) {
110:                        exceptionMsgIndex = currentIndex;
111:                        currentIndex++;
112:                    } else if ("{stacktrace}".equals(key)) {
113:                        showStackTrace = true;
114:                    }
115:                }
116:            }
117:
118:            public static void logErrors() {
119:                setLevel(ERROR);
120:            }
121:
122:            public static void logWarnings() {
123:                setLevel(WARNING);
124:            }
125:
126:            public static void logInfo() {
127:                setLevel(INFO);
128:            }
129:
130:            public static void logDebug() {
131:                setLevel(DEBUG);
132:            }
133:
134:            public static void logAll() {
135:                logDebug();
136:            }
137:
138:            public static void logToSystemError(boolean flag) {
139:                logSystemErr = flag;
140:            }
141:
142:            public static String getLevel() {
143:                if (loglevel == levelDebug)
144:                    return "DEBUG";
145:                if (loglevel == levelWarning)
146:                    return "WARNING";
147:                if (loglevel == levelError)
148:                    return "ERROR";
149:                if (loglevel == levelInfo)
150:                    return "INFO";
151:                return "ERROR";
152:            }
153:
154:            public static void setLevel(String aType) {
155:                if (aType == null)
156:                    aType = "INFO";
157:                if ("warning".equalsIgnoreCase(aType))
158:                    aType = "WARN";
159:                else
160:                    aType = aType.toUpperCase();
161:
162:                levelDebug = LEVELS.indexOf(DEBUG);
163:                levelWarning = LEVELS.indexOf(WARNING);
164:                levelInfo = LEVELS.indexOf(INFO);
165:                levelError = LEVELS.indexOf(ERROR);
166:
167:                if (LEVELS.contains(aType)) {
168:                    loglevel = LEVELS.indexOf(aType);
169:                } else {
170:                    logErrors();
171:                    logError("LogMgr.setLevel()", "Requested level " + aType
172:                            + " not found! Setting level " + ERROR, null);
173:                }
174:                debugEnabled = (loglevel == levelDebug);
175:                infoEnabled = (loglevel == levelInfo || debugEnabled);
176:            }
177:
178:            public static void shutdown() {
179:                if (logOut != null) {
180:                    logInfo(null,
181:                            "=================== Log stopped ===================");
182:                    logOut.close();
183:                }
184:            }
185:
186:            public static void setOutputFile(File logfile, int maxFilesize) {
187:                if (logfile == null)
188:                    return;
189:                if (logfile.equals(currentFile))
190:                    return;
191:
192:                try {
193:                    if (logOut != null) {
194:                        logOut.close();
195:                        logOut = null;
196:                    }
197:
198:                    if (logfile.exists() && logfile.length() > maxFilesize) {
199:                        File last = new File(logfile.getAbsolutePath()
200:                                + ".last");
201:                        if (last.exists())
202:                            last.delete();
203:                        logfile.renameTo(last);
204:                    }
205:                    logOut = new PrintStream(
206:                            new FileOutputStream(logfile, true));
207:                    currentFile = logfile;
208:                    logInfo(null,
209:                            "=================== Log started ===================");
210:                } catch (Throwable th) {
211:                    logOut = null;
212:                    logSystemErr = true;
213:                    logError("LogMgr.checkOutput()",
214:                            "Error when opening logfile="
215:                                    + logfile.getAbsolutePath(), th);
216:                }
217:            }
218:
219:            public static boolean isInfoEnabled() {
220:                return infoEnabled;
221:            }
222:
223:            public static boolean isDebugEnabled() {
224:                return debugEnabled;
225:            }
226:
227:            public static void logDebug(Object aCaller, String aMsg) {
228:                if (levelDebug > loglevel)
229:                    return;
230:                logMessage(DEBUG, aCaller, aMsg, null);
231:            }
232:
233:            public static void logSqlError(Object caller, String sql,
234:                    Throwable th) {
235:                if (th instanceof  SQLException) {
236:                    logDebug(caller, "Error executing statement: " + sql, th);
237:                } else {
238:                    logError(caller, "Error executing statement: " + sql, th);
239:                }
240:            }
241:
242:            public static void logDebug(Object aCaller, String aMsg,
243:                    Throwable th) {
244:                if (levelDebug > loglevel)
245:                    return;
246:                logMessage(DEBUG, aCaller, aMsg, th);
247:            }
248:
249:            public static void logInfo(Object aCaller, String aMsg) {
250:                if (levelInfo > loglevel)
251:                    return;
252:                logMessage(INFO_DISPLAY, aCaller, aMsg, null);
253:            }
254:
255:            public static void logInfo(Object aCaller, String aMsg, Throwable th) {
256:                if (levelInfo > loglevel)
257:                    return;
258:                logMessage(INFO_DISPLAY, aCaller, aMsg, th);
259:            }
260:
261:            public static void logWarning(Object aCaller, String aMsg) {
262:                if (levelWarning > loglevel)
263:                    return;
264:                logMessage(WARNING_DISPLAY, aCaller, aMsg, null);
265:            }
266:
267:            public static void logWarning(Object aCaller, String aMsg,
268:                    Throwable th) {
269:                if (levelWarning > loglevel)
270:                    return;
271:                logMessage(WARNING_DISPLAY, aCaller, aMsg, th);
272:            }
273:
274:            public static void logError(Object aCaller, String aMsg,
275:                    Throwable th) {
276:                if (levelError > loglevel)
277:                    return;
278:                logMessage(ERROR, aCaller, aMsg, th);
279:            }
280:
281:            public static void logError(Object aCaller, String aMsg,
282:                    SQLException se) {
283:                if (levelError > loglevel)
284:                    return;
285:
286:                logMessage(ERROR, aCaller, aMsg, se);
287:                if (se != null) {
288:                    SQLException next = se.getNextException();
289:                    while (next != null) {
290:                        logMessage(ERROR, "Chained exception", ExceptionUtil
291:                                .getDisplay(next), null);
292:                        next = next.getNextException();
293:                    }
294:                }
295:            }
296:
297:            private synchronized static void logMessage(String aType,
298:                    Object aCaller, String aMsg, Throwable th) {
299:                StrBuffer s = formatMessage(aType, aCaller, aMsg, th);
300:                if (logOut != null) {
301:                    s.writeTo(logOut);
302:                    logOut.flush();
303:                }
304:                if (logSystemErr) {
305:                    s.writeTo(System.err);
306:                }
307:            }
308:
309:            private static StrBuffer formatMessage(String aType,
310:                    Object aCaller, String aMsg, Throwable th) {
311:                StrBuffer buff = new StrBuffer(100);
312:
313:                for (int i = 0; i < NUM_ELEMENTS; i++)
314:                    MSG_ELEMENTS[i] = null;
315:
316:                if (timeIndex > -1) {
317:                    MSG_ELEMENTS[timeIndex] = getTimeString();
318:                }
319:
320:                if (typeIndex > -1) {
321:                    MSG_ELEMENTS[typeIndex] = aType;
322:                }
323:
324:                if (sourceIndex > -1) {
325:                    if (aCaller != null) {
326:                        if (aCaller instanceof  String)
327:                            MSG_ELEMENTS[sourceIndex] = (String) aCaller;
328:                        else
329:                            MSG_ELEMENTS[sourceIndex] = aCaller.getClass()
330:                                    .getName();
331:                    }
332:                }
333:
334:                if (messageIndex > -1) {
335:                    MSG_ELEMENTS[messageIndex] = aMsg;
336:                }
337:
338:                boolean hasException = false;
339:                if (exceptionMsgIndex > -1 && th != null) {
340:                    MSG_ELEMENTS[exceptionMsgIndex] = ExceptionUtil
341:                            .getDisplay(th);
342:                    hasException = true;
343:                }
344:
345:                boolean first = true;
346:
347:                for (int i = 0; i < NUM_ELEMENTS; i++) {
348:
349:                    if (MSG_ELEMENTS[i] != null) {
350:                        if (!first)
351:                            buff.append(" ");
352:                        else
353:                            first = false;
354:                        buff.append(MSG_ELEMENTS[i]);
355:                        if (i == sourceIndex)
356:                            buff.append(" -");
357:                        if (i == messageIndex && hasException)
358:                            buff.append(":");
359:                    }
360:                }
361:                buff.append(StringUtil.LINE_TERMINATOR);
362:
363:                // always display the stacktrace in debug level
364:                if (th != null
365:                        && (showStackTrace || loglevel == levelDebug || th instanceof  NullPointerException)) {
366:                    buff.append(getStackTrace(th));
367:                    buff.append(StringUtil.LINE_TERMINATOR);
368:                }
369:
370:                return buff;
371:            }
372:
373:            public static String getStackTrace(Throwable th) {
374:                if (th == null)
375:                    return StringUtil.EMPTY_STRING;
376:                try {
377:                    StringWriter sw = new StringWriter(2000);
378:                    PrintWriter pw = new PrintWriter(sw);
379:                    pw.println();
380:                    th.printStackTrace(pw);
381:                    pw.close();
382:                    return sw.toString();
383:                } catch (Exception ex) {
384:                }
385:                return StringUtil.EMPTY_STRING;
386:            }
387:
388:            private static String getTimeString() {
389:                theDate.setTime(System.currentTimeMillis());
390:                return formatter.format(theDate);
391:            }
392:
393:        }
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