java/copy-image-resizer/src/cz/frantovo/copyImageResizer/logging/SimpleFormatter.java
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/java/copy-image-resizer/src/cz/frantovo/copyImageResizer/logging/SimpleFormatter.java Mon Nov 17 21:58:52 2014 +0100
1.3 @@ -0,0 +1,103 @@
1.4 +/**
1.5 + * copy-image-resizer
1.6 + * Copyright © 2013 František Kučera (frantovo.cz)
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, either version 3 of the License, or
1.11 + * (at your option) any later version.
1.12 + *
1.13 + * This program is distributed in the hope that it will be useful,
1.14 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.15 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.16 + * GNU General Public License for more details.
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License
1.19 + * along with this program. If not, see <http://www.gnu.org/licenses/>.
1.20 + */
1.21 +package cz.frantovo.copyImageResizer.logging;
1.22 +
1.23 +import java.io.PrintWriter;
1.24 +import java.io.StringWriter;
1.25 +import java.text.SimpleDateFormat;
1.26 +import java.util.Date;
1.27 +import java.util.logging.Level;
1.28 +import java.util.logging.LogRecord;
1.29 +
1.30 +/**
1.31 + * For console/terminal log output. Log messages are printed in brief and colorful form.
1.32 + *
1.33 + * @author Ing. František Kučera (frantovo.cz)
1.34 + */
1.35 +public class SimpleFormatter extends AbstractFormatter {
1.36 +
1.37 + private static final ThreadLocal<SimpleDateFormat> dateFormatter = new ThreadLocal<SimpleDateFormat>() {
1.38 +
1.39 + @Override
1.40 + protected SimpleDateFormat initialValue() {
1.41 + return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
1.42 + }
1.43 +
1.44 + };
1.45 +
1.46 + @Override
1.47 + public String format(LogRecord r) {
1.48 + StringBuilder sb = new StringBuilder();
1.49 +
1.50 + printTimestamp(sb, new Date(r.getMillis()));
1.51 + printSeparator(sb);
1.52 + printLevel(sb, r.getLevel());
1.53 + printSeparator(sb);
1.54 + printMessage(sb, r);
1.55 + printSeparator(sb);
1.56 + printThrowable(sb, r);
1.57 + sb.append("\n");
1.58 +
1.59 + return sb.toString();
1.60 + }
1.61 +
1.62 + private void printSeparator(StringBuilder out) {
1.63 + out.append(" | ");
1.64 + }
1.65 +
1.66 + private void printTimestamp(StringBuilder out, Date date) {
1.67 + out.append(dateFormatter.get().format(date));
1.68 + }
1.69 +
1.70 + private void printLevel(StringBuilder out, Level l) {
1.71 +
1.72 + if (l == Level.SEVERE) {
1.73 + out.append(rpad("ERROR", 10));
1.74 + } else if (l == Level.INFO) {
1.75 + out.append(rpad("OK", 10));
1.76 + } else {
1.77 + out.append(rpad(l.getName(), 10));
1.78 + }
1.79 + }
1.80 +
1.81 + private void printMessage(StringBuilder out, LogRecord r) {
1.82 + String message = formatMessage(r);
1.83 + // convert to single-line message
1.84 + message = message.replaceAll("\\\\", "\\\\"); // escape backslashes
1.85 + message = message.replaceAll("\\n", "\\n"); // escape line ends
1.86 + out.append(message);
1.87 + }
1.88 +
1.89 + private void printThrowable(StringBuilder out, LogRecord r) {
1.90 + Throwable t = r.getThrown();
1.91 + if (t != null) {
1.92 + out.append(t.getClass().getSimpleName());
1.93 + String message = t.getLocalizedMessage();
1.94 + if (message != null) {
1.95 + out.append(": ");
1.96 + out.append(message);
1.97 + }
1.98 + if (isPrintStacktrace()) {
1.99 + out.append("\n");
1.100 + StringWriter sw = new StringWriter();
1.101 + t.printStackTrace(new PrintWriter(sw));
1.102 + out.append(sw.toString());
1.103 + }
1.104 + }
1.105 + }
1.106 +}