1 /**
2 * Logback: the reliable, generic, fast and flexible logging framework.
3 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
4 *
5 * This program and the accompanying materials are dual-licensed under
6 * either the terms of the Eclipse Public License v1.0 as published by
7 * the Eclipse Foundation
8 *
9 * or (per the licensee's choosing)
10 *
11 * under the terms of the GNU Lesser General Public License version 2.1
12 * as published by the Free Software Foundation.
13 */
14 package ch.qos.logback.classic.pattern;
15
16 import ch.qos.logback.classic.spi.ILoggingEvent;
17 import java.util.concurrent.atomic.AtomicLong;
18
19 /**
20 * A converters based on a locally incremented sequence number. The sequence
21 * number is initialized to the number of milliseconds elapsed since 1970-01-01
22 * until this instance is initialized.
23 *
24 * <p>
25 * <b>EXPERIMENTAL</b> This class is experimental and may be removed in the
26 * future.
27 *
28 */
29 public class LocalSequenceNumberConverter extends ClassicConverter {
30
31 AtomicLong sequenceNumber = new AtomicLong(System.currentTimeMillis());
32
33 @Override
34 public String convert(ILoggingEvent event) {
35 return Long.toString(sequenceNumber.getAndIncrement());
36 }
37 }