WebmanRollingFileAppender


1   package de.webman.util.log4j;
2   
3   import org.apache.log4j.Layout;
4   import org.apache.log4j.RollingFileAppender;
5   import com.teamkonzept.web.TKEvent;
6   import com.teamkonzept.web.servlet.ServletInterface;
7   import java.io.File  ;
8   import java.io.IOException  ;
9   
10  /**
11    Adds functionality to locate the log directory
12      * @author  $Author: alex $
13      * @version $Revision: 1.1 $
14  */
15  public class WebmanRollingFileAppender extends RollingFileAppender 
16  {
17      private static String   documentRoot;
18      private boolean appended = false;
19      
20      /**
21          The default constructor does nothing. 
22      */
23      public WebmanRollingFileAppender() 
24      {
25          super();
26      }
27  
28      /**
29          Instantiate a <code>DailyRollingFileAppender</code> and open the
30          file designated by <code>filename</code>. The opened filename will
31          become the ouput destination for this appender.
32      */
33      public WebmanRollingFileAppender (Layout layout, String   filename) throws java.io.IOException   
34      {
35          super();
36          // Root bekommen
37          String   root = getDocRoot();
38          if (root != null)
39              setFile(root + File.pathSeparator + filename);
40          else
41              setFile(filename);
42          
43          setLayout(layout);
44      }
45      
46      /**
47          ueberschrieben, um das LogVerzeichnis davor zu packen
48      */
49      public void setFile(String   name)
50      {
51          String   root = getDocRoot();
52          // System.out.println("Docroot : " + root + " Name " + name);
53          if (root != null)
54              super.setFile(root + File.separator+ name);
55          else
56              super.setFile(name);
57          
58      }
59      
60      /**
61          ueberschrieben, um das LogVerzeichnis davor zu packen
62      */
63      public void setFile(String   name, boolean append) throws java.io.IOException  
64      {
65          String   root = getDocRoot();
66          //System.out.println("Docroot append: " + root +  " NAme:" + name);
67          if (root != null)
68              super.setFile(root + File.separator + name, append);
69          else
70              super.setFile(name, append);
71          
72      }
73      
74      public static void setDocRoot(String   root)
75      {
76          documentRoot = root;
77          // appended = false;
78      }
79      
80      /**
81          setzt die Document Root der Webapplication vor den File Namen,
82          damit das log Verzeichnis nicht absolut im Konf-file angegeben werden muss
83      */
84      private  String   getDocRoot()
85      {
86          if (appended) // nur einmal davorpacken !
87              return null;
88          String   contextPath = null;
89          TKEvent event = TKEvent.getEventForThread();
90          if(event != null){
91              contextPath = ((ServletInterface)event.getHttpInterface()).getContextPath();
92          }
93          else if(documentRoot != null){
94              contextPath = documentRoot;                 
95          }
96          contextPath += "log" + File.separator;
97          appended = true;
98          // kurz testen, ob es das Verzeichnis schon gibt
99          File   f = new File  (contextPath);
100         if (!f.exists())
101             f.mkdir();
102         return contextPath;
103     }
104     
105 }
106
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