[jdom-interest] Please Help!

[Molina, Alexis E]

Laurent:
   No, that's what is strange.  There is not exception thrown, and no error
perse.  It's just that from a command line program (TestClass.class) I get
the full string I want, but from an equivalent servlet
(GetSchedulerData.class) I only get a partial string.  The servlet can't
seem to retieve all the data, but the other program can.

Alexis

-----Original Message-----
From: Laurent Bihanic [mailto:laurent.bihanic at atosorigin.com]
Sent: Wednesday, April 04, 2001 1:10 AM
To: Molina, Alexis E
Subject: Re: [jdom-interest] Please Help!



Any exception thrown?

Laurent

Molina, Alexis E wrote:

> Hello All:
>    I'm in a serious jam here, and I'm hoping someone can help.
> I have created a class (SchedulerJDOMHandler.class) that uses SaxBuilder
to
> grab some data from an XML source, based on an ID I pass it.
> I have a servlet that invokes the getData() method of
> SchedulerJDOMHandler.class.  The getData method should retrieve a list of
> values from the xml file, then append them to a url string as parameters,
> and return the final url string to the servlet.
> To test it, I also created a little program called TestClass.class.  This
> program and servlet are virtually identical in their function.
> 
> The problem is, when I run TestClass, it returns the final string
perfectly
> like so:
> C:\Program Files\Allaire\JRun\servers\default\cdnm\WEB-INF\classes>java
> TestClass
> ..../scheduler/config_scheduler.jsp?id="ftp.dc.viacom.com"&zone="North
> America - East"&mantype="Cisco Content Switch"&format="MIB"&pollfreq="5"
> &ftpurl="ftp://ftp.dc.viacom.com"&userid="user2"&pass="pass2"
> 
> But, when I do the same thing from the servlet, it only returns what the
url
> string was initialzed to (like: ../scheduler/config_scheduler.jsp?), but
> without the appended parameter values grabbed from the XML source.   For
> your convenience, I am pasting the code for the 3 classes below.  Could
> someone please explain why TestClass.class get's the correct data returned
> to it, but the servlet (GetSchedulerData.class) doesn't?  A serious
thanks,
> in advance, to anyone that can possibly help!  If it would help to have
the
> XML file, please let me know and I'll be glad to post it as well.
> 
> Appreciatively,
> 
> Alexis Molina
> San Diego, CA
> 
> import java.util.*;
> import java.net.*;
> import org.jdom.*;
> import org.jdom.input.SAXBuilder;
> 
> 
> public class SchedulerJDOMHandler
> {
> 
>   //public static String filePath = "scheduler_config.xml";
>   //public static String idPassed = passedID;
> 
>   public static List callListData(String idPassed, String xmlUrl) throws
> JDOMException {
>     return listData(xmlUrl, idPassed);
>   }
> 
>   public static List listData(String xmlUrl, String passedID)
>    throws JDOMException, NullPointerException {
> 
>     if (xmlUrl == null) {
>       throw new NullPointerException("File Path must be non-null");
>     }
> 
>     SAXBuilder builder = new SAXBuilder();
>     // Load the entire document into memory
>     // from the network or file system
>     Document doc = builder.build(xmlUrl);
> 
> 	// Descend the tree and find the Elements
> 	Element schedulersRoot = doc.getRootElement();
>     List schedulers = schedulersRoot.getChildren("scheduler");
>     Vector schedulerData = new Vector(schedulers.size());
>     Iterator iterator = schedulers.iterator();
>     while (iterator.hasNext()) {
>       Object o = iterator.next();
>       Element scheduler = (Element) o;
>       try {
> 
> 		Element id = scheduler.getChild("id");
> 		String idContent = id.getTextTrim();
> 		// Only grab content from record matching idPassed
> 		if(idContent.equals(passedID)) {
> 
> 			schedulerData.addElement(idContent);
> 
> 			Element zone = scheduler.getChild("zone");
> 			if (zone == null) continue;
> 			String zoneContent = zone.getTextTrim();
> 			schedulerData.addElement(zoneContent);
> 
> 			Element manufacturerType =
> scheduler.getChild("manufacturertype");
> 			if (manufacturerType == null) continue;
> 			String manufacturerTypeContent =
> manufacturerType.getTextTrim();
> 			schedulerData.addElement(manufacturerTypeContent);
> 
> 			Element format = scheduler.getChild("format");
> 			if (format == null) continue;
> 			String formatContent = format.getTextTrim();
> 			schedulerData.addElement(formatContent);
> 
> 			Element pollingFrequency =
> scheduler.getChild("pollingfrequency");
> 			if (pollingFrequency == null) continue;
> 			String pollingFrequencyContent =
> pollingFrequency.getTextTrim();
> 			schedulerData.addElement(pollingFrequencyContent);
> 
> 			Element ftpUrl = scheduler.getChild("ftpurl");
> 			if (ftpUrl == null) continue;
> 			String ftpUrlContent = ftpUrl.getTextTrim();
> 			schedulerData.addElement(ftpUrlContent);
> 
> 			Element userID = scheduler.getChild("userid");
> 			if (userID == null) continue;
> 			String userIDContent = userID.getTextTrim();
> 			schedulerData.addElement(userIDContent);
> 
> 			Element password = scheduler.getChild("password");
> 			if (password == null) continue;
> 			String passwordContent = password.getTextTrim();
> 			schedulerData.addElement(passwordContent);
> 		}
>       }
>       catch (Exception e) {
>       }
>     }
>     return schedulerData;
> 
>   }
> 
>   public String getData(String idPassed, String xmlUrl, String UrlRoot)
>   {
> 	//Create URL
> 	StringBuffer redirectURL = new StringBuffer(500);
> 	redirectURL.append(UrlRoot);
> 
> 	try {
> 
>       List schedulerData;
>       schedulerData = callListData(idPassed, xmlUrl);
> 
> 	  String strID = (String)schedulerData.get(0);
> 	  String strZone = (String)schedulerData.get(1);
> 	  String strManType = (String)schedulerData.get(2);
> 	  String strFormat = (String)schedulerData.get(3);
> 	  String strPollFreq = (String)schedulerData.get(4);
> 	  String strFtpUrl = (String)schedulerData.get(5);
> 	  String strUserID = (String)schedulerData.get(6);
>       String strPass = (String)schedulerData.get(7);
> 
>       //Append parameters to redirectUrl
>       redirectURL.append("id=\"" + strID + "\"&");
>       redirectURL.append("zone=\"" + strZone + "\"&");
>       redirectURL.append("mantype=\"" + strManType + "\"&");
>       redirectURL.append("format=\"" + strFormat + "\"&");
>       redirectURL.append("pollfreq=\"" + strPollFreq + "\"&");
>       redirectURL.append("ftpurl=\"" + strFtpUrl + "\"&");
>       redirectURL.append("userid=\"" + strUserID + "\"&");
>       redirectURL.append("pass=\"" + strPass + "\"");
> 
> 	  //Return the Value
> 	  return redirectURL.toString();
> 	}
> 	catch (JDOMException jdme) {
> 		System.out.println("JDOMException Occured :" +
> jdme.getMessage());
> 		jdme.printStackTrace();
> 	}
> 	catch (NullPointerException ne) {
> 		System.out.println("NullPointerException Occured :" +
> ne.getMessage());
> 		ne.printStackTrace();
> 	}
> 	catch (Exception e) {
> 		System.out.println("Some Exception Occured :" +
> e.getMessage());
> 		e.printStackTrace();
> 	}
> 	//Return the Value
> 	return redirectURL.toString();
>   }
> }
> __________________________________
> 
> import java.io.*;
> import java.util.*;
> import java.net.*;
> import javax.servlet.*;
> import javax.servlet.http.*;
> 
> public class GetSchedulerData extends HttpServlet {
> 
> 	public void init(ServletConfig config) throws ServletException
> 	{
> 		super.init( config );
> 	}
> 
> 	public void destroy()
> 	{
> 		super.destroy();
> 	}
> 
> 	public String getServletInfo()
> 	{
> 		return this.getClass().getName();
> 	}
> 
> 	public void service(HttpServletRequest req, HttpServletResponse res)
> 	     throws ServletException, IOException
> 	{
> 		// Set the content-type to HTML
> 		res.setContentType("text/html");
> 
> 		// Get the PrintWriter for the servlet response
> 		PrintWriter out = res.getWriter();
> 
> 		// Retrieve field values entered
> 		String schedulerID = req.getParameter("id");
> 		//String schedulerID = "ftp.la.viacom.com";
> 		String xmlUrl = "scheduler_config.xml";
> 		String redirectUrlRoot =
> "../scheduler/config_scheduler.jsp?";
> 
> 		SchedulerJDOMHandler dataRetrieved = new
> SchedulerJDOMHandler();
> 		String finalRedirectUrl = dataRetrieved.getData(schedulerID,
> xmlUrl, redirectUrlRoot);
> 
> 		try
> 		{
> 			//Redirect and Pass all Data Parameters
> 			out.println("Hell Yep!");
> 			out.println("<br>");
> 			out.println(finalRedirectUrl);
> 			out.println("<br>");
> 			out.println(schedulerID);
> 			//res.sendRedirect(finalRedirectUrl);
> 		}
> 		catch (Exception e)
> 		{
> 			out.println("Exception: " + e);
> 		}
> 	}
> }
> __________________________
> 
> public class TestClass
> {
> 	public static void main(String[] args)
> 	{
> 
> 		String schedulerID = "ftp.dc.viacom.com";
> 		String xmlUrl = "scheduler_config.xml";
> 		String redirectUrlRoot =
> "../scheduler/config_scheduler.jsp?";
> 
> 		SchedulerJDOMHandler dataRetrieved = new
> SchedulerJDOMHandler();
> 		String finalRedirectUrl = dataRetrieved.getData(schedulerID,
> xmlUrl, redirectUrlRoot);
> 
> 
> 		System.out.println(finalRedirectUrl);
> 	}
> }
>
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