001/** 002 * Logback: the reliable, generic, fast and flexible logging framework. 003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved. 004 * 005 * This program and the accompanying materials are dual-licensed under 006 * either the terms of the Eclipse Public License v1.0 as published by 007 * the Eclipse Foundation 008 * 009 * or (per the licensee's choosing) 010 * 011 * under the terms of the GNU Lesser General Public License version 2.1 012 * as published by the Free Software Foundation. 013 */ 014package ch.qos.logback.classic.pattern; 015 016import ch.qos.logback.classic.spi.ILoggingEvent; 017import java.util.concurrent.atomic.AtomicLong; 018 019/** 020 * A converters based on a locally incremented sequence number. The sequence 021 * number is initialized to the number of milliseconds elapsed since 1970-01-01 022 * until this instance is initialized. 023 * 024 * <p> 025 * <b>EXPERIMENTAL</b> This class is experimental and may be removed in the 026 * future. 027 * 028 */ 029public class LocalSequenceNumberConverter extends ClassicConverter { 030 031 AtomicLong sequenceNumber = new AtomicLong(System.currentTimeMillis()); 032 033 @Override 034 public String convert(ILoggingEvent event) { 035 return Long.toString(sequenceNumber.getAndIncrement()); 036 } 037}