001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.core.pattern; 018 019import java.lang.management.ManagementFactory; 020 021import org.apache.logging.log4j.core.LogEvent; 022import org.apache.logging.log4j.core.config.plugins.Plugin; 023import org.apache.logging.log4j.util.PerformanceSensitive; 024 025/** 026 * Returns the relative time in milliseconds since JVM Startup. 027 */ 028@Plugin(name = "RelativeTimePatternConverter", category = PatternConverter.CATEGORY) 029@ConverterKeys({ "r", "relative" }) 030@PerformanceSensitive("allocation") 031public class RelativeTimePatternConverter extends LogEventPatternConverter { 032 private final long startTime = ManagementFactory.getRuntimeMXBean().getStartTime(); 033 034 /** 035 * Private constructor. 036 */ 037 public RelativeTimePatternConverter() { 038 super("Time", "time"); 039 } 040 041 /** 042 * Obtains an instance of RelativeTimePatternConverter. 043 * 044 * @param options options, currently ignored, may be null. 045 * @return instance of RelativeTimePatternConverter. 046 */ 047 public static RelativeTimePatternConverter newInstance(final String[] options) { 048 return new RelativeTimePatternConverter(); 049 } 050 051 /** 052 * {@inheritDoc} 053 */ 054 @Override 055 public void format(final LogEvent event, final StringBuilder toAppendTo) { 056 final long timestamp = event.getTimeMillis(); 057 toAppendTo.append(timestamp - startTime); 058 } 059}