| /* |
| * 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.logging.log4j.core.pattern; |
| |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.core.config.plugins.Plugin; |
| |
| import java.lang.management.ManagementFactory; |
| |
| /** |
| * Return the relative time in milliseconds since JVM Startup. |
| */ |
| @Plugin(name = "RelativeTimePatternConverter", type = "Converter") |
| @ConverterKeys({"r", "relative" }) |
| public class RelativeTimePatternConverter extends LogEventPatternConverter { |
| /** |
| * Cached formatted timestamp. |
| */ |
| private long lastTimestamp = Long.MIN_VALUE; |
| private long startTime = ManagementFactory.getRuntimeMXBean().getStartTime(); |
| private String relative; |
| |
| /** |
| * Private constructor. |
| */ |
| public RelativeTimePatternConverter() { |
| super("Time", "time"); |
| } |
| |
| /** |
| * Obtains an instance of RelativeTimePatternConverter. |
| * |
| * @param options options, currently ignored, may be null. |
| * @return instance of RelativeTimePatternConverter. |
| */ |
| public static RelativeTimePatternConverter newInstance( |
| final String[] options) { |
| return new RelativeTimePatternConverter(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void format(final LogEvent event, final StringBuilder toAppendTo) { |
| long timestamp = event.getMillis(); |
| |
| synchronized (this) { |
| if (timestamp != lastTimestamp) { |
| lastTimestamp = timestamp; |
| relative = Long.toString(timestamp - startTime); |
| } |
| } |
| toAppendTo.append(relative); |
| } |
| } |