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/**
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* copy-image-resizer
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* Copyright © 2013 František Kučera (frantovo.cz)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package cz.frantovo.copyImageResizer.logging;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.logging.Level;
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import java.util.logging.LogRecord;
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/**
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* For console/terminal log output. Log messages are printed in brief and colorful form.
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*
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* @author Ing. František Kučera (frantovo.cz)
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*/
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public class SimpleFormatter extends AbstractFormatter {
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private static final ThreadLocal<SimpleDateFormat> dateFormatter = new ThreadLocal<SimpleDateFormat>() {
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@Override
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protected SimpleDateFormat initialValue() {
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return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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}
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};
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@Override
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public String format(LogRecord r) {
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StringBuilder sb = new StringBuilder();
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printTimestamp(sb, new Date(r.getMillis()));
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printSeparator(sb);
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printLevel(sb, r.getLevel());
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printSeparator(sb);
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printMessage(sb, r);
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printSeparator(sb);
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printThrowable(sb, r);
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sb.append("\n");
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return sb.toString();
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}
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private void printSeparator(StringBuilder out) {
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out.append(" | ");
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}
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private void printTimestamp(StringBuilder out, Date date) {
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out.append(dateFormatter.get().format(date));
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}
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private void printLevel(StringBuilder out, Level l) {
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if (l == Level.SEVERE) {
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out.append(rpad("ERROR", 10));
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} else if (l == Level.INFO) {
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out.append(rpad("OK", 10));
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} else {
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out.append(rpad(l.getName(), 10));
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}
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}
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private void printMessage(StringBuilder out, LogRecord r) {
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String message = formatMessage(r);
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// convert to single-line message
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message = message.replaceAll("\\\\", "\\\\"); // escape backslashes
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message = message.replaceAll("\\n", "\\n"); // escape line ends
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out.append(message);
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}
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private void printThrowable(StringBuilder out, LogRecord r) {
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Throwable t = r.getThrown();
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if (t != null) {
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out.append(t.getClass().getSimpleName());
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String message = t.getLocalizedMessage();
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if (message != null) {
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out.append(": ");
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out.append(message);
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}
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if (isPrintStacktrace()) {
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out.append("\n");
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StringWriter sw = new StringWriter();
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t.printStackTrace(new PrintWriter(sw));
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out.append(sw.toString());
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}
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}
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}
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}
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