ErrorHandler


1   package dinamica;
2   
3   import java.io.PrintWriter  ;
4   import java.io.StringWriter  ;
5   
6   /**
7    * Transaction module for the general error manager
8    * 
9    * <br>
10   * Creation date: jan/13/2004<br>
11   * Last Update: march/1/2005<br>
12   * (c) 2004 Martin Cordova<br>
13   * This code is released under the LGPL license<br>
14   * @author Martin Cordova
15   * */
16  public class ErrorHandler extends GenericTransaction
17  {
18  
19      /* (non-Javadoc)
20       * @see dinamica.GenericTransaction#service(dinamica.Recordset)
21       */
22      public int service(Recordset inputParams) throws Throwable  
23      {
24  
25          //capture referer page
26          String   referer = getRequest().getHeader("Referer");
27          getRequest().setAttribute("dinamica.error.referer", referer);
28          getRequest().setAttribute("dinamica.error.context", getRequest().getContextPath());
29          
30          String   date = StringUtil.formatDate(new java.util.Date  (), "yyyy-MM-dd HH:mm:ss");
31          String   key = "javax.servlet.error.exception";
32          Throwable   err = (Throwable  )getRequest().getAttribute(key);
33          String   errUri = (String  )getRequest().getAttribute("javax.servlet.error.request_uri");
34          
35          // default log to STDERR
36          if (err!=null)
37              System.err.println("[Exception@" + date + "] " + err.getMessage() 
38                      + " context: " + getRequest().getContextPath() 
39                      + " uri:" + errUri 
40                      + " referer:" + referer);
41          
42          try
43          {
44              int rc = super.service(inputParams);
45  
46              // capture stack trace for exceptions
47              // raised by non-Dinamica Actions
48              String   trace = (String  )getRequest().getAttribute("dinamica.error.stacktrace");
49              if (trace==null)
50              {
51                  //this exception was not raised by dinamica.Controller
52                  //use standard J2EE request attributes
53                  if (err!=null)
54                  {           
55                      //get stack trace
56                      StringWriter   s = new StringWriter  ();
57                      PrintWriter   errMsg = new PrintWriter  (s);
58                      err.printStackTrace(errMsg);
59                      trace = s.toString();
60                      getRequest().setAttribute("dinamica.error.stacktrace", trace);
61                  }
62                      
63              }
64      
65      
66              //get email config
67              String   enabled = getConfig().getConfigValue("//mail/enabled");
68      
69              if (enabled.equals("true"))
70              {
71                  String   host = getConfig().getConfigValue("//mail/host");
72                  String   subject = getConfig().getConfigValue("//mail/subject");
73                  String   from = getConfig().getConfigValue("//mail/from");
74                  String   fromName = getConfig().getConfigValue("//mail/from-name");;
75                  String   to = getConfig().getConfigValue("//mail/to");
76                  String   body = getResource("body.txt");
77      
78                  //build message
79                  TemplateEngine t = new TemplateEngine(getContext(),getRequest(), body);
80                  t.replaceDefaultValues();
81                  t.replaceLabels();
82                  t.replaceRequestAttributes();                       
83                  body = t.toString();
84                  
85                  //send email
86                  SimpleMail s = new SimpleMail();
87                  s.send(host,from,fromName,to,subject,body);
88                  
89              }
90  
91              return rc;
92  
93          }
94          catch (Throwable   e)
95          {
96              System.err.println("[WARNING@" + date + "] ErrorHandler failed: " + e.getMessage());
97              throw e;
98          }
99          
100     }
101 
102 }
103
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Free Books Free Magazines
Popular Tags