ExceptionImpl


1   /*
2   This software is OSI Certified Open Source Software.
3   OSI Certified is a certification mark of the Open Source Initiative.
4   
5   The license (Mozilla version 1.0) can be read at the MMBase site.
6   See http://www.MMBase.org/license
7   
8   */
9   
10  package org.mmbase.util.logging;
11  import java.util.*;
12  import org.apache.log4j.spi.LocationInfo;
13  
14  /**
15   * A very simple implementation of Logger. It ignores everything below
16   * warn (or what else if configured), and throws an exception for
17   * everything higher. In junit tests this generates test-case failures
18   * if a warn or error is issued (we don't want that in normal
19   * situations).
20   *
21   * Logging can be set up like this in the setup of your test:
22     <pre>
23    Logging.configure(System.getProperty("mmbase.config") + File.separator + "log" + File.separator + "log.xml");
24     </pre>
25   *
26   * @author Michiel Meeuwissen
27   * @since  MMBase-1.7
28   * @version $Id: ExceptionImpl.java,v 1.6 2005/10/02 16:42:15 michiel Exp $
29   */
30  
31  public class ExceptionImpl extends AbstractSimpleImpl implements Logger {
32  
33      private String   cat;
34      private static   Map instances = new HashMap();
35      protected static int exceptionLevel  = Level.WARN_INT;
36      protected static Level staticLevel  = Level.WARN;
37  
38      private ExceptionImpl(String   c) {
39          cat = c;
40      }
41  
42      public static  ExceptionImpl getLoggerInstance(String   name) {
43          if (instances.containsKey(name)) {
44              return (ExceptionImpl) instances.get(name);
45          } else {
46              ExceptionImpl i = new ExceptionImpl(name);
47              i.setLevel(staticLevel);
48              instances.put(name, i);
49              return i;
50          }
51      }
52  
53      /**
54       * The configure method of this Logger implemenation.
55       *
56       * @param c A string, which can contain the output (stdout or
57       * stderr) and the priority (e.g. 'info')
58       */
59      public static  void configure(String   c) {
60          if (c == null) {
61             return; // everything default
62          } else {
63              StringTokenizer t    = new StringTokenizer(c, ",");
64              if (t.hasMoreTokens()) {
65                  exceptionLevel = Level.toLevel(t.nextToken()).toInt();
66              }
67              if (t.hasMoreTokens()) {
68                  Level l  = Level.toLevel(t.nextToken());
69                  staticLevel = l;
70                  Iterator i = instances.values().iterator();
71                  while (i.hasNext()) {
72                      Logger log = (Logger) i.next();
73                      log.setLevel(l);
74                  }
75              }
76          }
77      }
78  
79      protected final void log (String   s, Level l) {
80          if (l.toInt() >= level) {
81              Throwable   t = new Throwable  ();
82              LocationInfo info = new LocationInfo(t, AbstractSimpleImpl.class.getName());
83              System.out.println(info.getFileName() + ":" + info.getMethodName() + "." + info.getLineNumber() + ": " + s);
84              System.out.println(Logging.stackTrace(t));
85          }
86          if (l.toInt() >= exceptionLevel) {
87              throw new LoggingException(cat + ":" + s, l);
88          }
89      }
90  
91  
92  }
93
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