1 /*
2 * This file is a part of the SchemaSpy project (http://schemaspy.sourceforge.net).
3 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 John Currier
4 *
5 * SchemaSpy is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * SchemaSpy is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 package net.sourceforge.schemaspy.util;
20
21 import java.io.PrintWriter;
22 import java.io.StringWriter;
23 import java.text.DateFormat;
24 import java.text.SimpleDateFormat;
25 import java.util.Date;
26 import java.util.logging.Formatter;
27 import java.util.logging.LogRecord;
28
29 /**
30 * Format a LogRecord into a single concise line.
31 *
32 * @author John Currier
33 */
34 public class LogFormatter extends Formatter {
35 private final String lineSeparator = System.getProperty("line.separator");
36 private final int MAX_LEVEL_LEN = 7;
37 private static final String formatSpec = "HH:mm:ss.";
38
39 /**
40 * Date formatter for time-to-text translation.
41 * These are very expensive to create and not thread-safe, so do it once per thread.
42 */
43 private static final ThreadLocal<DateFormat> dateFormatter = ThreadLocal.withInitial(() -> new SimpleDateFormat(formatSpec));
44
45 /**
46 * Optimization to keep from creating a new {@link java.util.Date} for every call to
47 * {@link #toString()}.
48 */
49 private static final ThreadLocal<Date> date = ThreadLocal.withInitial(Date::new);
50
51 /**
52 * Format the given LogRecord.
53 *
54 * @param logRecord
55 * the log record to be formatted.
56 * @return a formatted log record
57 */
58 @Override
59 public String format(LogRecord logRecord) {
60 StringBuilder buf = new StringBuilder(128);
61
62 // format the date portion:
63
64 // thread-safe pseudo-singletons:
65 date.get().setTime(logRecord.getMillis());
66 buf.append(dateFormatter.get().format(date.get()));
67
68 // compute frac as the number of milliseconds off of a whole second
69 long frac = logRecord.getMillis() % 1000;
70
71 // force longFrac to overflow 1000 to give 1 followed by
72 // 'leading' zeros
73 frac += 1000;
74
75 // append the fraction of a second at the end (w/o leading overflowed 1)
76 buf.append(Long.toString(frac).substring(1));
77
78 buf.append(" ");
79 StringBuilder level = new StringBuilder(logRecord.getLevel().getLocalizedName());
80 if (level.length() > MAX_LEVEL_LEN)
81 level.setLength(MAX_LEVEL_LEN);
82 level.append(":");
83 while (level.length() < MAX_LEVEL_LEN + 1)
84 level.append(' ');
85 buf.append(level);
86 buf.append(" ");
87
88 String name;
89 if (logRecord.getSourceClassName() != null) {
90 name = logRecord.getSourceClassName();
91 } else {
92 name = logRecord.getLoggerName();
93 }
94
95 int lastDot = name.lastIndexOf('.');
96 if (lastDot >= 0 && lastDot < name.length() - 1)
97 name = name.substring(lastDot + 1);
98 buf.append(name);
99
100 if (logRecord.getSourceMethodName() != null) {
101 buf.append('.');
102 buf.append(logRecord.getSourceMethodName());
103 }
104
105 buf.append(" - ");
106 buf.append(formatMessage(logRecord));
107 buf.append(lineSeparator);
108
109 if (logRecord.getThrown() != null) {
110 try {
111 StringWriter stacktrace = new StringWriter();
112 logRecord.getThrown().printStackTrace(new PrintWriter(stacktrace, true));
113 buf.append(stacktrace);
114 // stack trace already has a line separator
115 } catch (Exception ignore) {
116 }
117 }
118
119 return buf.toString();
120 }
121 }