[opencms-dev] how to use the Scheduled tasks?

[fangzhu]

hi there,

i've been tried to use the Scheduled Tasks these days. but it wasn't working
at all.
i opened the "Scheduled tasks" from Administration view, and enterd a line
like this:
  30 21 15 5 * Admin Users Publish 4
 then i wrote a file "Publish.java" like this:

  import java.io.File;
  import java.io.FileWriter;
  import java.io.IOException;
  import java.io.StringWriter;
  import javax.servlet.ServletContext;
  import javax.servlet.http.HttpServlet;
  import javax.xml.parsers.DocumentBuilder;
  import javax.xml.parsers.DocumentBuilderFactory;
  import javax.xml.transform.Transformer;
  import javax.xml.transform.TransformerFactory;
  import javax.xml.transform.dom.DOMSource;
  import javax.xml.transform.stream.StreamResult;
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  import org.w3c.dom.Node;
  import com.opencms.core.CmsException;
  import com.opencms.core.I_CmsCronJob;
  import com.opencms.file.CmsObject;

  public class Publish extends HttpServlet implements I_CmsCronJob
  {
   ServletContext application = getServletConfig().getServletContext();

   public String launch(CmsObject arg0, String arg1)
    throws IOException, CmsException
   {
    Document document = null;
    try
    {
     DocumentBuilder builder =
      DocumentBuilderFactory.newInstance().newDocumentBuilder();
     document =
      builder.parse(
       new File(
        application.getRealPath("export/Sample/addbook.xml")));
     Element element = document.createElement("new");
     element.appendChild(
      document.createTextNode("this is the new element"));
     Node member = document.getElementsByTagName("member").item(0);
     member.insertBefore(
      element,
      document.getElementsByTagName("address").item(0));
     StringWriter sw = new StringWriter();
     Transformer t = TransformerFactory.newInstance().newTransformer();
     t.transform(new DOMSource(document), new StreamResult(sw));
     String out = sw.toString().replaceFirst("UTF-8", "Shift_Jis");
     //out print all the document to temp.xml
     FileWriter fw =
      new FileWriter(
       new File(
        application.getRealPath("export/Sample/addbook.xml")));
     try
     {
      fw.write(out);
      fw.close();
     }
     catch (IOException e)
     {
      e.printStackTrace();
     }
    }
    catch (Exception e)
    {
     e.printStackTrace();
    }
    int project_id = Integer.parseInt(arg1);
    arg0.publishProject(project_id);
    return "Scheduler launched successfully!";
   }
   public static void main(String[] args)
   {
    CmsObject cms = new CmsObject();
    Publish publish = new Publish();
    String string = "";
    try
    {
     string = publish.launch(cms, "4");
    }
    catch (IOException e)
    {
     e.printStackTrace();
    }
    catch (CmsException e)
    {
     e.printStackTrace();
    }
    System.out.println(string);

   }
  }
the class simplely add a node to an xml file.
the problem is that i don't know how to define a CmsObject in main method
which is needed to call the launch mothod.
i complied it and put the class into C:\Program Files\Apache Tomcat
4.0\webapps\opencms\WEB-INF\classes\, but it didn't work.
could someone with experence of Scheduled tasks give me a simple example
java source?
and is there a API documentation of Opencms somethere?

thank you in advance!

With regards

---------------------------------
fangzhu from      japan
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