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/*
* Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.helper;
import org.traccar.Config;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.ConsoleHandler;
import java.util.logging.Formatter;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
public final class Log {
private Log() {
}
private static final String STACK_PACKAGE = "org.traccar";
private static final int STACK_LIMIT = 3;
private static class RollingFileHandler extends Handler {
private String name;
private String suffix;
private Writer writer;
RollingFileHandler(String name) {
this.name = name;
}
@Override
public synchronized void publish(LogRecord record) {
if (isLoggable(record)) {
try {
String suffix = new SimpleDateFormat("yyyyMMdd").format(new Date(record.getMillis()));
if (writer != null && !suffix.equals(this.suffix)) {
writer.close();
writer = null;
new File(name).renameTo(new File(name + "." + this.suffix));
}
if (writer == null) {
this.suffix = suffix;
writer = new BufferedWriter(new FileWriter(name, true));
}
writer.write(getFormatter().format(record));
writer.flush();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
@Override
public void flush() {
if (writer != null) {
try {
writer.flush();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
@Override
public void close() throws SecurityException {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
public static class LogFormatter extends Formatter {
private boolean fullStackTraces;
LogFormatter(boolean fullStackTraces) {
this.fullStackTraces = fullStackTraces;
}
private static String formatLevel(Level level) {
switch (level.getName()) {
case "FINEST":
return "TRACE";
case "FINER":
case "FINE":
return "DEBUG";
case "INFO":
return "INFO";
case "WARNING":
return "WARN";
case "SEVERE":
default:
return "ERROR";
}
}
@Override
public String format(LogRecord record) {
StringBuilder message = new StringBuilder(record.getMessage());
if (record.getThrown() != null) {
message.append(" - ");
if (fullStackTraces) {
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
record.getThrown().printStackTrace(printWriter);
message.append(System.lineSeparator()).append(stringWriter.toString());
} else {
message.append(exceptionStack(record.getThrown()));
}
}
return String.format("%1$tF %1$tT %2$5s: %3$s%n",
new Date(record.getMillis()), formatLevel(record.getLevel()), message.toString());
}
}
public static void setupLogger(Config config) {
Logger rootLogger = Logger.getLogger("");
for (Handler handler : rootLogger.getHandlers()) {
rootLogger.removeHandler(handler);
}
Handler handler;
if (config.getBoolean("logger.console")) {
handler = new ConsoleHandler();
} else {
handler = new RollingFileHandler(config.getString("logger.file"));
}
handler.setFormatter(new LogFormatter(config.getBoolean("logger.fullStackTraces")));
Level level = Level.parse(config.getString("logger.level").toUpperCase());
rootLogger.setLevel(level);
handler.setLevel(level);
rootLogger.addHandler(handler);
}
public static String exceptionStack(Throwable exception) {
StringBuilder s = new StringBuilder();
String exceptionMsg = exception.getMessage();
if (exceptionMsg != null) {
s.append(exceptionMsg);
s.append(" - ");
}
s.append(exception.getClass().getSimpleName());
StackTraceElement[] stack = exception.getStackTrace();
if (stack.length > 0) {
int count = STACK_LIMIT;
boolean first = true;
boolean skip = false;
String file = "";
s.append(" (");
for (StackTraceElement element : stack) {
if (count > 0 && element.getClassName().startsWith(STACK_PACKAGE)) {
if (!first) {
s.append(" < ");
} else {
first = false;
}
if (skip) {
s.append("... < ");
skip = false;
}
if (file.equals(element.getFileName())) {
s.append("*");
} else {
file = element.getFileName();
s.append(file.substring(0, file.length() - 5)); // remove ".java"
count -= 1;
}
s.append(":").append(element.getLineNumber());
} else {
skip = true;
}
}
if (skip) {
if (!first) {
s.append(" < ");
}
s.append("...");
}
s.append(")");
}
return s.toString();
}
}
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