XSL Stylesheet transformation in a servlet
Hi there Group.
Not sure if anyone can help me with this here, but worth a shot.
I was hoping someone would be able to help me with some code that Ive
knocked up to test JDOM being used in a servlet.
Quick Synopsis:
Servlet gets hold of a stylesheet in its init() method and caches for
future reuse.The doGet() method then sets up a database connection, uses the
JDOMResultSetBuilder to get an XML representation of the record and uses
this as the XMLSource. A transformation is then done on the XMLSource and
I want this to be output to the browser for display.Everything compiles
OK, I have setup tomcat, webxml, and jar files appropriately and the
Servlet runs using http://127.0.0.1:8080/mywebapp/servlet/JDOMServlet.Many thanks for
taking the time to read this. Much appreciated.
Rgds
JS
I'm not sure how right my code is, but it runs with no output. Here's the
code..
import javax.servlet.*;
import javax.servlet.http.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import org.jdom.*;
import org.jdom.input.*;
import org.jdom.output.*;
import org.jdom.transform.*;
import org.jdom.JDOMException;
import org.jdom.contrib.input.ResultSetBuilder;
import java.sql.*;
import java.io.*;
import java.io.IOException;
import java.lang.*;
public class JDOMServlet extends HttpServlet {
private TransformerFactory tFactory =
TransformerFactory.newInstance();private String url =
jdbc:odbc:StudentDB;
private ResultSet rs = null;
private StreamSource xsltSource;
public void init(ServletConfig config) throws ServletException {
super.init(config);
ServletContext context = config.getServletContext();
try {
//Want to cache the stylesheet for future resuse
//then it doesnt have to be loaded constantly
xsltSource = new
StreamSource(context.getResourceAsStream(/Web-Inf/viewStudentDetails.xsl));//---I
think this is the problem line, it is LINE 35 --//
Templates templates =
tFactory.newTemplates(xsltSource);}
catch (TransformerConfigurationException tce) {
tce.printStackTrace();
}
}
public void doGet(HttpServletRequest request, HttpServletResponse
response)throws ServletException, java.io.IOException {
response.setContentType(text/html);
//setup the database connection and use the
ResultSetBuilder to generate//a JDOM XML document of a
students details
try {
Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);
Connection conn =
DriverManager.getConnection(url,,);
Statement stmt = conn.createStatement();
System.out.println(Connected to database);
Namespace ns = Namespace.getNamespace(xhtml,
http://w3.org/etc;);
rs = stmt.executeQuery(SELECT * FROM tblStudent
WHERE StudentID =9917217);
System.out.println(Executing query:SELECT * FROM
tblStudent WHEREStudentID = 9917217);
ResultSetBuilder builder = new
ResultSetBuilder(rs);Document doc =
builder.build();
XMLOutputter xOutputter = new XMLOutputter(
, true);xOutputter.output(doc,
System.out);
//get the JDOM document that was produced by the
JDOM ResultSetBuilder//and convert to
a normal dom document for use by
the transformerprocessor
org.jdom.output.DOMOutputter dOutputter = new
org.jdom.output.DOMOutputter();
org.w3c.dom.Document domDocument =
dOutputter.output(doc);
Source xmlSource = new
javax.xml.transform.dom.DOMSource(domDocument);
//create the output result for the newly created
XSLT document//this will allow me to
output the result to the
browserStreamResult result = new
StreamResult
response.getOutputStream());//get the
transformer
System.out.println(Preparing to create
RE: XSL Stylesheet transformation in a servlet
Hi Yoav,
Much appreciated for your analysis. Many thanks.
I have a few questions.
(1) When u say overide the init() method with the version with the config
parameter, which version is this. public void init(ServletConfig config)
is the only signiature I can find.(2)All the System.out.println commands
in my servlet go to catalina.out in the logs directory. I dont actualy
have a console output.(3) xOutputter.output(doc, System.out); Do you get
any output to System.out? This does come, it was the xmlfile that was in
my original mail, again, it also went to catalina.out. Does the WEB-INF
ile have to be capatilised. I actually have it on my system as
Web-inf.(4)Correct!, TransformerConfigurationException is the root
cause. The only refernece to my program in the stack trace is at
JDOMServlet.init(JDOMServlet.java:35) which is the line I highlighted
below.
Howdy,
Not sure if anyone can help me with this here, but worth a shot.
This sort of thing should be marked as [OFF-TOPIC] in the subject if
you're going to post if to the list at all.
public void init(ServletConfig config) throws ServletException
{
Override the init() method, the version with the config parameter,
instead of this version.
xsltSource = new
StreamSource(context.getResourceAsStream(/Web-
Inf/viewStudentDetails.xsl));//---I think this is the problem
line, it
is LINE 35 --//
Print out what getResourceAsStream() produces. Make WEB-INF
capitalized in the argument, as this is case sensitive.
Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);
Yikes ;) I dislike JdbcOdbc bridges but we'll leave that for now.
ResultSetBuilder(rs);
Print out the result set contents just to verify them.
xOutputter.output(doc, System.out);
Do you get any output to System.out?
java.net.MalformedURLException
at java.net.URL.init(URL.java:613)
at java.net.URL.init(URL.java:476)
at java.net.URL.init(URL.java:425)
But the root causes was a TransformerConfigurationException it appears,
from the bottom of your output, right?
Yoav Shapira
Millennium ChemInformatics
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no localhost but 127.0.0.1:8080 works
Hi Group, I have a problem here, my setup no longer responds to http://localhost:8080/blahblah.It works if I use the IP addy, 127.0.0.1:8080, but I think this is causing some problems within tomcat with its own internal references. Does anyone know how I can fix this. I vaguely recall reading about a hosts file in System32 folder of windows but cant remember for the life of me what it was talking about. Thanks JS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: no localhost but 127.0.0.1:8080 works
Thank you to all those who replied to my earlier query. Unfortunately, I'm still not having any luck. From the advice given, I have a hosts.sam file and a hosts (note, no extension) in my C:\windows directory. I am using Win 98 and Tomcat 4 Is there any other reason as to why localhost:8080 would not work, my port reference in server.xml is still 8080 as well so I see no reason for the problems. Thanks again Of course, if you use my example path for winnt below be sure to lean the last two name seperators to the left instead of the right...my fingers just have trouble with those sometimes... -chris -Original Message- From: Halstead, Chris Sent: Friday, April 04, 2003 1:25 PM To: Tomcat Users List; [EMAIL PROTECTED] Subject: RE: no localhost but 127.0.0.1:8080 works If you are on Windoze NT/2000 check c:\winnt\system32\drivers/etc/hosts. I think the Win9x variants use c:\windows\etc or c:\windows\system\etc, I don't remember which. The hosts file there should have an entry for 'localhost' that maps to 127.0.0.1. -chris -Original Message- From: JS [mailto:[EMAIL PROTECTED] Sent: Friday, April 04, 2003 1:16 PM To: [EMAIL PROTECTED] Subject: no localhost but 127.0.0.1:8080 works Hi Group, I have a problem here, my setup no longer responds to http://localhost:8080/blahblah.It works if I use the IP addy, 127.0.0.1:8080, but I think this is causing some problems within tomcat with its own internal references. Does anyone know how I can fix this. I vaguely recall reading about a hosts file in System32 folder of windows but cant remember for the life of me what it was talking about. Thanks JS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can't access my servlet
Hi there, I was just wondering, does this action have to be performeed with all servlets produced?? Thanks Many thanks!!! I added this entry to the web.xml servlet-mapping servlet-nameTestServlet/servlet-name url-pattern/TestServlet/url-pattern /servlet-mapping and was able to access it with this url: http://localhost:8080/stcecilia/TestServlet Thanks, Lori - Original Message - From: Tam, Michael [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Wednesday, April 02, 2003 7:14 PM Subject: RE: Can't access my servlet you need url mapping for your servlet in your web.xml file. Servlet inovker is disable since 4.1.12 I believe if you do read the release note carefully in your tomcat installation. -Original Message- From: Lori Bishop [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 02, 2003 4:12 PM To: tomcat maillist Subject: Can't access my servlet I just installed Tomcat and am able to start it up successfully and access the examples servlet successfully using: http://localhost:8080/examples/servlet/HelloWorldExample I have my own servlet in C:\jakarta-tomcat-4.1.24\webapps\stcecilia\WEB-INF\classes\TestServlet.class When I try to access it with http://localhost:8080/stcecilia/servlet/TestServlet I get this message: description The requested resource (/stcecilia/servlet/TestServlet) is not available. Based on other postings in this mailing list, I added this entry to the server.xml !-- stcecilia Context -- Context path=/stcecilia docBase=stcecilia debug=0 reloadable=true crossContext=true Logger className=org.apache.catalina.logger.FileLogger prefix=localhost_stcecilia_log. suffix=.txt timestamp=true/ /Context Here is my C:\jakarta-tomcat-4.1.24\webapps\stcecilia\WEB-INF\web.xml ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/dtd/web-app_2_3.dtd; web-app display-nameStCeciliaSite/display-name description St Cecilia Website /description servlet servlet-nameTestServlet/servlet-name servlet-classTestServlet/servlet-class /servlet /web-app Any ideas on what I am doing wrong. Thanks for your help, Lori - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
why has tomcat just crashed
Hi All, I recently began using the Java Web Services Devloper Pack (JWSDP) installation of tomcat, which had been running fine up until now.I changed the server.xml file briefly to try and install a new context for my app, but later replaced my changes with the original backup of the server.xml file. Now tomcat is refusing to start up, any idea why this is the case? Heres the error The requested URL could not be retrieved While trying to retrieve the URL: http://localhost:8080/ The following error was encountered: Unable to determine IP address from host name for localhost The dnsserver returned: Name Error: The domain name does not exist. This means that: The cache was not able to resolve the hostname presented in the URL. Check if the address is correct. Your cache administrator is webmaster. Regards JS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
connection pooling saga
Hello. Has anyone ever done connection pooling with MS Access and tomcat 4.1.12? I havent had much luck in trying to find this done anywhere, and much of the advice is to go with mySQL. Though I am reluctant to due to the lack of Foreign Key support in mySQL and the fact that I have done alot with Access. I have read the DBCP tomcat support docs, but this is only geared towards mySQL, does such a thing exist for MS Access? Advance thanks JS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: connection pooling saga
Cheers Filip, I didnt realise that DBCP would suppport Access. (1) Doesnt the driver need to be a jar file though?? (2) I thought I needed an actual JDBC driver for MS Access. (3) Does the DBCP support for MS Access Connection Pooling mean that I no longer need my ConnectionPoolServlets to manage the connections. I will read through the HOW-TOs again? Any more advice would be much appreciated JS who needs foreign keys, they only slow your DB down anyway :) DBCP can support any DB, you will need an ODBC bridge for Access, then you just give DBCP the odbc bridge driver info, and it should work Filip -Original Message- From: JS [mailto:[EMAIL PROTECTED] Sent: Monday, March 31, 2003 4:06 PM To: [EMAIL PROTECTED] Subject: connection pooling saga Hello. Has anyone ever done connection pooling with MS Access and tomcat 4.1.12? I havent had much luck in trying to find this done anywhere, and much of the advice is to go with mySQL. Though I am reluctant to due to the lack of Foreign Key support in mySQL and the fact that I have done alot with Access. I have read the DBCP tomcat support docs, but this is only geared towards mySQL, does such a thing exist for MS Access? Advance thanks JS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat 4.01/Apache 1.13.22/Mod Webapp
Okay I'm desparate. I need help. You guys have been great, but here's my deal: I have set up Tomcat 4.01 to serve jsp alongside apache. I'm trying to deploy an app that uses jdbc connections to mysql. I know the connections work, but I am having a problem setting up server.xml and web.xml properly to stop the IllegalStateException errors my app keeps throwing once it connects through jdbc. Any suggestions? These are the error messages I get from the logs: From catalina.out StandardContext[/osc]: Mapping contextPath='/osc' with requestURI='/osc/template_designer/select_category.jsp' and relativeURI='/template_designer/select_category.jsp' StandardContext[/osc]: Decoded relativeURI='/template_designer/select_category.jsp' StandardContext[/osc]: Trying exact match StandardContext[/osc]: Trying prefix match StandardContext[/osc]: Trying extension match StandardContext[/osc]: Mapped to servlet 'jsp' with servlet path '/template_designer/select_category.jsp' and path info 'null' and update=true JspEngine -- /template_designer/select_category.jsp ServletPath: /template_designer/select_category.jsp PathInfo: null RealPath: /www/htdocs/webapps/osc/template_designer/select_category.jsp RequestURI: /osc/template_designer/select_category.jsp QueryString: null Request Params: Classpath according to the Servlet Engine is: /www/htdocs/webapps/osc/WEB-INF/classes/:/www/htdocs/webapps/osc/WEB-INF/lib/mm.mysql-2.0.4-bin.jar:/www/htdocs/webapps/osc/WEB-INF/lib/mysql.jar:/a/www/tomcat/classes/:/a/www/tomcat/lib/jasper-runtime.jar:/a/www/tomcat/lib/naming-factory.jar:/a/www/tomcat/lib/jasper-compiler.jar:/a/www/tomcat/lib/mm.mysql-2.0.4-bin.jar:/a/www/tomcat/lib/mysql.jar:/a/www/tomcat/common/classes/:/a/www/tomcat/common/lib/mail.jar:/a/www/tomcat/common/lib/naming-common.jar:/a/www/tomcat/common/lib/jta-spec1_0_1.jar:/a/www/tomcat/common/lib/tyrex-0.9.7.0.jar:/a/www/tomcat/common/lib/xerces.jar:/a/www/tomcat/common/lib/activation.jar:/a/www/tomcat/common/lib/naming-resources.jar:/a/www/tomcat/common/lib/servlet.jar:/a/www/tomcat/common/lib/mm.mysql-2.0.4-bin.jar:/a/www/tomcat/common/lib/mysql.jar Class name is: select_0005fcategory$jsp StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception Also, the Scots are said to have invented golf. Then they had to invent Scotch whiskey to take away the pain and frustration. -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.01/Apache 1.13.22/Mod Webapp
PS I am clueless on this one guys. -- Someone did a study of the three most-often-heard phrases in New York City. One is Hey, taxi. Two is, What train do I take to get to Bloomingdale's? And three is, Don't worry. It's just a flesh wound. -- David Letterman -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.01/Apache 1.13.22/Mod Webapp
Maybe I should explain it a little better: My Set up: server.xml only has a service declared for apache mod_webapp. no stand alone. apache has WebAppDeploy for the application I want to be able to run the app from a directory under my apache doc root so I have my files under there /www/htdocs/webapp for some reason, I think because of the way my xml files are configured, the app, apache, or tomcat (I don't know which) cannot access all of my class files. On Thursday 01 November 2001 10:46, you wrote: JS at [EMAIL PROTECTED] wrote: Okay I'm desparate. I need help. You guys have been great, but here's my deal: I have set up Tomcat 4.01 to serve jsp alongside apache. I'm trying to deploy an app that uses jdbc connections to mysql. I know the connections work, but I am having a problem setting up server.xml and web.xml properly to stop the IllegalStateException errors my app keeps throwing once it connects through jdbc. Any suggestions? It doesn't look like anything is weird with mod_webapp... IMO it's a JSP issue... Or does that stands out _only_ thru apache, while it works stand alone? Pier -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- I am, in point of fact, a particularly haughty and exclusive person, of pre-Adamite ancestral descent. You will understand this when I tell you that I can trace my ancestry back to a protoplasmal primordial atomic globule. Consequently, my family pride is something inconceivable. I can't help it. I was born sneering. -- Pooh-Bah, The Mikado -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: how to use *.jsp w/ mod_webapp?
These are the additions I've included in httpd.conf to make mod_webapp serve jsp: LoadModule webapp_module libexec/mod_webapp.so IfModule mod_webapp.c WebAppConnection warpConnection warp localhost:8008 WebAppDeploy examples warpConnection /examples/ WebAppDeploy webdav warpConnection /webdav/ /IfModule make sure the ServerName directive is uncommented. Hope that helps. On Thursday 18 October 2001 11:53, you wrote: Hi, I've built mod_webapp.so at last. When i was using mod_jk, my httpd.conf included: JkMount /*.jsp ajp12 to enable JSP on apache. Now what shoud I rewrite that to? Using WebAppDeploy directive? If so, please give me an example. --- Truly Yours, Norihisa Washitake [EMAIL PROTECTED] -- paak, n:A stadium or inclosed playing field. To put or leave (a a vehicle) for a time in a certain location. patato, n: The starchy, edible tuber of a widely cultivated plant. Septemba, n:The 9th month of the year. shua, n:Having no doubt; certain. sista, n: A female having the same mother and father as the speaker. tamato, n: A fleshy, smooth-skinned reddish fruit eaten in salads or as a vegetable. troopa, n: A state policeman. Wista, n: A city in central Masschewsetts. yaad, n:A tract of ground adjacent to a building. -- Massachewsetts Unabridged Dictionary
