[jdom-interest] Please Help!
Kevin Baynes
kbaynes at renex.com
Thu Apr 5 09:49:31 PDT 2001
You might want to try one of the servlet mailing lists, since it seems that
everything you are doing so far as JDOM is concerned works - proved by the
fact that your test class works.
Have you gone through all you code and setup debug information to be printed
to System.out or to a log file (not just the outputstream back to the
browser)? Are you sure that everything is being built the way that you want
it to in the servlet? The way to make sure is to write out debug info to
System.out or a log file at all your key steps.
Also, I notice that in SchedulerJDOMHandler you have a try block that
catches exceptions, but no code to handle the exception. You might want to
check for it.
Hope this helps,
--------------------
Kevin Baynes
Software Engineer
kbaynes at renex.com
703-393-2191
> -----Original Message-----
> From: jdom-interest-admin at jdom.org
> [mailto:jdom-interest-admin at jdom.org]On Behalf Of Molina, Alexis E
> Sent: Wednesday, April 04, 2001 9:40 AM
> To: 'jdom-interest at jdom.org'
> Subject: RE: [jdom-interest] Please Help!
>
>
> Could someone perhaps recommend another list to post this question on as
> well? I'm sorry, I'm just in a desperate situation to get this
> working, and
> need a response. Are there other help lists with JDOM support out there?
>
> Alexis Molina
> San Diego, CA
>
> -----Original Message-----
> From: Molina, Alexis E [mailto:aemolina at kpmg.com]
> Sent: Tuesday, April 03, 2001 8:34 PM
> To: 'jdom-interest at jdom.org'
> Subject: [jdom-interest] Please Help!
>
>
> 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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