org.apache.juli.OneLineFormatter Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.juli;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
/**
* Provides same information as default log format but on a single line to make
* it easier to grep the logs. The only exception is stacktraces which are
* always preceded by whitespace to make it simple to skip them.
*/
/*
* Date processing based on AccessLogValve.
*/
public class OneLineFormatter extends Formatter {
/**
* The set of month abbreviations for log messages.
*/
private static final String months[] = {"Jan", "Feb", "Mar", "Apr", "May",
"Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
private static final String LINE_SEP = System.getProperty("line.separator");
private static final String ST_SEP = LINE_SEP + " ";
private final SimpleDateFormat dayFormatter = new SimpleDateFormat("dd");
private final SimpleDateFormat monthFormatter = new SimpleDateFormat("MM");
private final SimpleDateFormat yearFormatter = new SimpleDateFormat("yyyy");
private final SimpleDateFormat timeFormatter =
new SimpleDateFormat("HH:mm:ss.S");
private Date currentDate;
private String currentDateString;
@Override
public String format(LogRecord record) {
StringBuilder sb = new StringBuilder();
// Timestamp
addTimestamp(sb, new Date(record.getMillis()));
// Severity
sb.append(' ');
sb.append(record.getLevel());
// Source
sb.append(' ');
sb.append(record.getSourceClassName());
sb.append('.');
sb.append(record.getSourceMethodName());
// Message
sb.append(' ');
sb.append(record.getMessage());
// Stack trace
if (record.getThrown() != null) {
sb.append(ST_SEP);
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
record.getThrown().printStackTrace(pw);
pw.close();
sb.append(sw.getBuffer());
}
// New line for next record
sb.append(LINE_SEP);
return sb.toString();
}
public void addTimestamp(StringBuilder buf, Date date) {
if (currentDate != date) {
synchronized (this) {
if (currentDate != date) {
StringBuilder current = new StringBuilder(32);
current.append(dayFormatter.format(date)); // Day
current.append('-');
current.append(lookup(monthFormatter.format(date))); // Month
current.append('-');
current.append(yearFormatter.format(date)); // Year
current.append(' ');
current.append(timeFormatter.format(date)); // Time
currentDateString = current.toString();
currentDate = date;
}
}
}
buf.append(currentDateString);
}
/**
* Return the month abbreviation for the specified month, which must
* be a two-digit String.
*
* @param month Month number ("01" .. "12").
*/
private String lookup(String month) {
int index;
try {
index = Integer.parseInt(month) - 1;
} catch (Exception e) {
index = 0; // Can not happen, in theory
}
return (months[index]);
}
}