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1   /**
2    * Logback: the reliable, generic, fast and flexible logging framework.
3    * Copyright (C) 1999-2009, 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 chapter4.mail;
15  
16  import org.slf4j.Logger;
17  import org.slf4j.LoggerFactory;
18  
19  import ch.qos.logback.classic.LoggerContext;
20  import ch.qos.logback.classic.joran.JoranConfigurator;
21  import ch.qos.logback.core.util.StatusPrinter;
22  
23  
24  
25  /**
26   * This application generates log messages in numbers specified by the
27   * user. See
28   * also configuration scripts rolling.properties and rolling.xml.
29   * */
30  public class EMail {
31    static public void main(String[] args) throws Exception {
32      if (args.length != 2) {
33        usage("Wrong number of arguments.");
34      }
35  
36      int runLength = Integer.parseInt(args[0]);
37      String configFile = args[1];
38  
39      LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
40      JoranConfigurator configurator = new JoranConfigurator();
41      lc.reset();
42      configurator.setContext(lc);
43      configurator.doConfigure(configFile);
44      StatusPrinter.printInCaseOfErrorsOrWarnings(lc);
45      
46      Logger logger = LoggerFactory.getLogger(EMail.class);
47  
48      for (int i = 1; i <= runLength; i++) {
49        if ((i % 10) < 9) {
50          logger.debug("This is a debug message. Message number: " + i);
51        } else {
52          logger.warn("This is a warning message. Message number: " + i);
53        }
54      }
55  
56      logger.error("At last an error.", new Exception("Just testing"));
57      
58      StatusPrinter.printInCaseOfErrorsOrWarnings(lc);
59    }
60  
61    static void usage(String msg) {
62      System.err.println(msg);
63      System.err.println("Usage: java " + EMail.class.getName() +
64        " runLength configFile\n" +
65        "   runLength (integer) the number of logs to generate\n" +
66        "   configFile a logback configuration file in XML format." +
67        " XML files must have a '.xml' extension.");
68      System.exit(1);
69    }
70  }