Debugging servlets using jdb

Hello friends, can anyone please help me in debugging servlets using jdb. I am using tomcat as the web server. Thanks

http://developer.java.sun.com/developer/onlineTraining/Programming/JDCBook/servlet.html

Similar Messages

Servlet debugging using jdb

hello friends, could anyone help me in debugging servlets using jdb. I am using tomcat as the web server. any suggestions or tip would be greatly appreciated. Thanks a lot.

suggestion:
If it is possible, move the processing of data out of the servlet and into a black box.
This way..you can test the black box and use an IDE tool for debugging.
you can make your servlet parse the parameter and pass it along

{Q} Debuging Servlets with VCafe 4.0 using WebLogic as WEB server

Hi,
          I am trying to set up VCafe 4.0 to debug servlets deployed on WebLogic 5.1.
          I don't have any problem with default servlet debugging, but I don't know
          how to tell VCafe that my WEB Server isWebLogic. Any ideas?
          Greg Mirsky


What edition of VCafe is required?
          Enterprise, Professional or standard. I am now using JBuilder and anyone has
          experience comparing it with VCafe.
          Jonathan
          Don Reamey wrote:
          > Start the EJB Server from within Cafe ( you must have an EJB project open),
          > also have your servlet project open.
          >
          > Once the EJB server has been started from with in Cafe, select attach to
          > process from the file menu.
          >
          > Attach to your server and set a break point in your sevlet.
          >
          > Go to the browser of your choice and run your application as normal.
          >
          > The break point should get hit and you can start stepping.
          >
          > The same procedure works for JSP's as long as you have the
          > keepgenerated=true.
          >
          > Don Reamey
          > www.ibexone.com
          >
          > "Greg Mirsky" <[email protected]> wrote in message
          > news:[email protected]..
          > > Hi,
          > > I am trying to set up VCafe 4.0 to debug servlets deployed on WebLogic
          > 5.1.
          > > I don't have any problem with default servlet debugging, but I don't know
          > > how to tell VCafe that my WEB Server isWebLogic. Any ideas?
          > > Greg Mirsky
          > >
          > >
          > >

Does WLS support Debugging Servlets with JBuilder 3 ?

I have read all the news groups and it appears that WLS 4.5.1 does not
support debugging Servlets with Jbuilder 3.0.
I am using the trial version, does this matter ?
Or should I just buy another web server ?
Joe

I think below documents will be helpful to you.
http://docs.oracle.com/cd/E23943_01/apirefs.1111/e13952/taskhelp/webservices/webservicesecurity/CreateDefaultWSSConfig.html
This document tell you that you can attach a weblogic webservice configuration using weblogic admin console.
After creating this configuration you need to updated this configuration as per the steps given under :
Use X.509 certificates to establish identity
Thanks,
sandeep

How to see full conent when using jdb

I am using jdb to debug some corruptted char array. When I dump one buffer object that contains char array, I can not view full content since it is too long. Is there a way I can save to this content to a file? Or is there another way to look at full message?
Thanks a lot.

Thanks for your response. All of my pages are php pages in which I use the php require command to display a header and footer. In CS4, when I open any page from my site in Design or Split view, all I can see is the header.htm file. I cannot see any of the content from that particular page. I have to go into code view and delete the <?php require("header.htm"); ?> from the code. The I can view and edit that page's content after which I have to paste the <?php require("header.htm"); ?> command back in and load the saved file to the server. A royal pain in the butt.

Debugging JSPs using Visual Cafe

          I am using WL 5.1 and trying to figure out how to debug JSPs using Visual Cafe 4.0.(Enterprise Edition). The JSP file is running fine if I use plain "javac" for compilation. If I change the compiler to include -g option (for debug), I get the following error.
          Thu Aug 31 15:46:37 CDT 2000:<E> <ServletContext-General> Servlet failed with Exception
          java.lang.NumberFormatException: error=2
          at java.lang.Integer.parseInt(Integer.java:409)
          at java.lang.Integer.parseInt(Integer.java:458)
          at weblogic.servlet.jsp.JspStub.compilePage JspStub.java:303)
          at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:174)
          at weblogic.servlet.jsp.JspStub.checkForReload(JspStub.java:92)
          at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
          java:168)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          pl.java:99)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:742)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          textImpl.java:686)
          at weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          ContextManager.java:247)
          at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          a:361)
          at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          weblogic.properties
          weblogic.httpd.initArgs.*.jsp=\
                    pageCheckSeconds=1,\
                    compileCommand=C:/VisualCafeEE/java2/bin/javac.exe -g,\
                    workingDir=C:/weblogic/myserver/classfiles,\
                    verbose=true
          If I don't use -g option, the page gets displayed correctly. Any help would be appreciated.
          Thanks
          Sree Pillai


assuming you are running on Windows, you can use a .cmd file with the
          following command in it
          javac -g %*
          if you name it c:/java/bin/javac.cmd, then replace the line with
          compileCommand=C:/java/bin/javac.cmd,\
          Barry
          Sree <[email protected]> wrote in message
          news:[email protected]...
          >
          > I am using WL 5.1 and trying to figure out how to debug JSPs using Visual
          Cafe 4.0.(Enterprise Edition). The JSP file is running fine if I use plain
          "javac" for compilation. If I change the compiler to include -g option (for
          debug), I get the following error.
          >
          > Thu Aug 31 15:46:37 CDT 2000:<E> <ServletContext-General> Servlet failed
          with Exception
          > java.lang.NumberFormatException: error=2
          > at java.lang.Integer.parseInt(Integer.java:409)
          > at java.lang.Integer.parseInt(Integer.java:458)
          > at weblogic.servlet.jsp.JspStub.compilePage JspStub.java:303)
          > at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:174)
          > at weblogic.servlet.jsp.JspStub.checkForReload(JspStub.java:92)
          > at
          weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
          > java:168)
          > at
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
          > pl.java:99)
          > at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > textImpl.java:742)
          > at
          weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
          > textImpl.java:686)
          > at
          weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
          > ContextManager.java:247)
          > at
          weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
          > a:361)
          > at
          weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
          >
          > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          >
          >
          >
          > weblogic.properties
          > -------
          > weblogic.httpd.initArgs.*.jsp=\
          > pageCheckSeconds=1,\
          > compileCommand=C:/VisualCafeEE/java2/bin/javac.exe -g,\
          > workingDir=C:/weblogic/myserver/classfiles,\
          > verbose=true
          > --------------
          >
          >
          > If I don't use -g option, the page gets displayed correctly. Any help
          would be appreciated.
          >
          > Thanks
          > Sree Pillai

Debugging Servlet with JBuilder 6

Does anyone know how to debug a servlet with JBuilder version 6?
I have created the servlet without the wizard.
Thanks.
-Amar

You can use ServletExecDebugger from NewAtlanta.
You can download ServletExecDebugger at
http://www.newatlanta.com/products/servletexec/download.jsp
1. Extract ServletExecDebugger files to your local folder
2. Import ServletExecDebugger.jar file into you JBuilder
workspace
3. There will be ServletExecDebuggerMain.java file
Import that also.
4. Set ClassPath, Project Path , etc and off you go.
ServletExecDebugger comes with good documentation
for a free debugger.
I have been using it for sometime now (in both JBuilder and Visual Age) and find it relatively simple to setup and good for debugging servlets.
You cannot debug JSPs that much easier though !
Hope this helps..
KD

Debuging servlet on weblogic

I am trying to learn to debug servlet on weblogic . In one of the site it is written as
Locate startWSL.cmd and add the following variable DEBUG_OPTS:
set DEBUG_OPTS = -Xdebug -Xrunjdwp:transport= dt_socket,address=1044,server=y,suspend=n
I am confused with this .Please tell me why is this necessary for debugging.
Thank you

Java uses the Java Platform Debugger Architecture to define how a Java debugger connects to a running Java application for the purpose of debugging that application. To enable an application for debugging, you have to add some parameters to the command line to specify a few things, like what transport will be used to transfer data, and if a socket-based transport, what port number should be used. Once you define those parameters on the command line and the application is running, you can specify the port number in the debug configuration of your debugger to make a connection to that running application.
You can read more about the various debugging-related command line options on the following page, which is just part of the larger JPDA documentation:
[http://java.sun.com/javase/6/docs/technotes/guides/jpda/conninv.html]
If you peruse the documentation for your favorite debugger, you can find information about connecting to remote Java applications, and it should give you similar information.

Using JDB in a multithreaded gui environment

Hi there all I am currently working in a multithreaded gui environment, I would like to use jdb, I manged to launch my project using the jdb in place of the java command ( I did the javac -g thing), I then type run it all launches fine and I am prompted with main[]
then I type cont abd then it starts I get prompted with > and I am stuck here no code list works I resume try everything but stuck in the treads is there a way of igmoring this and seleting the classes I want to debug I also tried setting breakpoints but htese nere get hit when I type clear I can seee the break point but dont hit thwem even thow those breakpointed sections of code is executed the break point dose not halt the code can anyone help regards Michael

Hi there all I am currently working in a multithreaded
gui environment, I would like to use jdb, I manged to
launch my project using the jdb in place of the java
command ( I did the javac -g thing), I then type run
it all launches fine and I am prompted with main[]
then I type cont abd then it starts I get prompted
with >At this point your application is running. The ">"
prompt means jdb has no current thread setting.
Enter threads to see a list of the threads in
your application.
Enter classes to see the classes that are loaded.
Enter fields className to see the fields of a class.
Enter suspend to stop the debugee, and then enter where all
to see the thread stacks, or use the thread command to set
the current thread, then use the where command.
A thread must be suspended (or at a breakpoint) and jdb must be set
to the thread you want to examine (via the thread command,
or automatically when you hit a breakpoint) before you can display
the stack, do a list to see the source at that point, or
use locals to see the local variables for that stack frame.
Enter resume so the debugee threads will continue.
and I am stuck here no code list works I resume
try everything but stuck in the treads is there a way
of igmoring this and seleting the classes I want to
debug I also tried setting breakpoints but htese nere
get hit when I type clear I can seee the break point
but dont hit thwem even thow those breakpointed
sections of code is executed the break point dose not
halt the code can anyone help regards MichaelAre you using the full name of the class (including any
package names) when setting breakpoints?

Debugging servlets in JDeveloper

Folks !
I just noticed that at least JDeveloper 3.2.3 doesn't let you debug a servlet that is not directly derived from HttpServlet. That is if I have a servlet class A derived from a Class B which then derives from HttpServlet, I only get to debug Class B and not Class A. This is a very stupid restriction (confirms my perception of these IDEs being toys). I am hoping JDeveloper 9i can handle debugging servlet derived from another class which in turn is derived from HttpServlet. can 9i users pl. confirm that ?
Also, given current restriction of JDeveloper 3.2.3 what option do I have other than upgrading to 9i (which I hope doen't have this problem) ? Remore debugging using JDPA ?
thanks for your help.
regards,
-Sanjay Kumar

Folks !
I just noticed that at least JDeveloper 3.2.3 doesn't let you debug a servlet that is not directly derived from HttpServlet. That is if I have a servlet class A derived from a Class B which then derives from HttpServlet, I only get to debug Class B and not Class A. This is a very stupid restriction (confirms my perception of these IDEs being toys). I am hoping JDeveloper 9i can handle debugging servlet derived from another class which in turn is derived from HttpServlet. can 9i users pl. confirm that ?
Also, given current restriction of JDeveloper 3.2.3 what option do I have other than upgrading to 9i (which I hope doen't have this problem) ? Remore debugging using JDPA ?
thanks for your help.
regards,
-Sanjay Kumar

Debugging servlet/JSPs ??

What IDE would you use to debug Servlet/JSPs ? I think that JBuilder can
only debug Servlets. What about VisualCafe, VisualAge ?
Olivier
[olivier.vcf]

Currently it is a bug in JDeveloper 3.1.x. We will be fixing it.
raghu

Unable to deploy a simple servlet using WAR file on Oracle9iAS v9.0.3

Hi All,
I am facing problem while deploying a simple servlet using WAR file on Oracle 9i App Server.
I have installed Oracle9iAS J2EE and Web Cache v9.0.3 on Windows 2000 server.
It includes:
     - Oracle HTTP Server
     - Oracle9iAS Containers for J2EE
     - Oracle9iAS Web Cache
     - Oracle Enterprise Manager
The release of installed Oracle9iAS is Release 2 (9.0.3)
I referred following link to Deploy Applications Using WAR file:
     http://otn.oracle.com/products/ias/daily/sept12.html
As mentioned in this documentation I have followed following steps to deploy WAR file:
1] I have created a war file by name SimpleServlet.war. In SimpleServlet.war, there is a servlet by name Simple which prints time at which servlet was accessed.
2] I have modified <ora9ias_home>\j2ee\home\config\application.xml and added following web module entry:
     <web-module id="SimpleServlet" path="../../home/applications/SimpleServlet.war" />
3] To make this module accessible from over the web, I have modified file
     <ora9ias_home>\j2ee\home\config\default-web-site.xml and added following entry:
     <web-app application="SimpleServlet" name="SimpleServlet" root="/SimpleServlet"/>
4] I saved both the files and started Oracle HTTP Server and accessed page as below:
          http://<server>:7777/SimpleServlet/Simple
where Simple is servlet in SimpleServlet.war file.
In the browser, The page cannot be found is shown to user. I have verified that SimpleServlet.war is extracted to SimpleServlet folder under <ora9ias_home>\j2ee\home\applications folder. I found that Simple.class is stored under WEB-INF/classes folder and web.xml contains correct entry for url pattern for servlet Simple.
What else could be the problem? Am I placing the war file in wrong place or modifying application.xml or default-web-site.xml in a wrong directory?
This is very urgent. Please help me with your valuable comments on this.
Thanks in advance.
Regards,
Sandesh

Hi All,
I am facing problem while deploying a simple servlet
using WAR file on Oracle 9i App Server.
I have installed Oracle9iAS J2EE and Web Cache v9.0.3
on Windows 2000 server.
It includes:
     - Oracle HTTP Server
     - Oracle9iAS Containers for J2EE
     - Oracle9iAS Web Cache
     - Oracle Enterprise Manager
The release of installed Oracle9iAS is Release 2
(9.0.3)
I referred following link to Deploy Applications
Using WAR file:
     http://otn.oracle.com/products/ias/daily/sept12.html
As mentioned in this documentation I have followed
following steps to deploy WAR file:
1] I have created a war file by name
SimpleServlet.war. In SimpleServlet.war, there is a
servlet by name Simple which prints time at which
servlet was accessed.
2] I have modified
<ora9ias_home>\j2ee\home\config\application.xml and
added following web module entry:
<web-module id="SimpleServlet"
path="../../home/applications/SimpleServlet.war" />
3] To make this module accessible from over the web,
I have modified file
<ora9ias_home>\j2ee\home\config\default-web-site.xml
and added following entry:
<web-app application="SimpleServlet"
name="SimpleServlet" root="/SimpleServlet"/>
4] I saved both the files and started Oracle HTTP
Server and accessed page as below:
          http://<server>:7777/SimpleServlet/Simple
where Simple is servlet in SimpleServlet.war file.
In the browser, The page cannot be found is shown to
user. I have verified that SimpleServlet.war is
extracted to SimpleServlet folder under
<ora9ias_home>\j2ee\home\applications folder. I found
that Simple.class is stored under WEB-INF/classes
folder and web.xml contains correct entry for url
pattern for servlet Simple.
What else could be the problem? Am I placing the war
file in wrong place or modifying application.xml or
default-web-site.xml in a wrong directory?
This is very urgent. Please help me with your
valuable comments on this.
Thanks in advance.
Regards,
SandeshHave you restarted you http server and then tried to load it again? Are you using the right port; maybe you have to use port 7778? Check you server settings in the http server instance. Also check your url binding of you application at Farm > Application Server: infrastructurehost > OC4J_instance > Application: appname > Web Module: modulename
Good luck!
rgds Thomas

Unable to deploy a simple servlet using WAR file

Hi All,
I am facing problem while deploying a simple servlet using WAR file on Oracle 9i App Server.
I have installed Oracle 9i App Server. I referred following link to Deploy Applications Using WAR file:
     http://otn.oracle.com/products/ias/daily/sept12.html
As mentioned in this documentation I have followed following steps to deploy WAR file:
1] I have created a war file by name SimpleServlet.war. In SimpleServlet.war, there is a servlet by name Simple which prints time at which servlet was accessed.
2] I have modified <ora9ias_home>\j2ee\home\config\application.xml and added following web module entry:
     <web-module id="SimpleServlet" path="../../home/applications/SimpleServlet.war" />
3] To make this module accessible from over the web, I have modified file
     <ora9ias_home>\j2ee\home\config\default-web-site.xml and added following entry:
     <web-app application="SimpleServlet" name="SimpleServlet" root="/SimpleServlet"/>
4] I saved both the files and started Oracle HTTP Server and accessed page as below:
          http://<server>:7777/SimpleServlet/Simple
where Simple is servlet in SimpleServlet.war file.
In the browser, The page cannot be found is shown to user. I have verified that SimpleServlet.war is extracted to SimpleServlet folder under <ora9ias_home>\j2ee\home\applications folder. I found that Simple.class is stored under WEB-INF/classes folder and web.xml contains correct entry for url pattern for servlet Simple.
What else could be the problem? Am I placing the war file in wrong place or modfiying application.xml or default-web-site.xml in a wrong directory?
This is very urgent. Please help me with your valuable comments on this.
Thanks in advance.
Regards,
Sandesh

Hi Juliana,
Thanks a lot for your suggestion.
I am sorry if I have posted this message to a wrong forum. This is first time I am posting a message to OTN. I will resend message to J2EE forum as per you suggestion.
Meanwhile, please note information you asked for is as below:
I installed Oracle9iAS J2EE and Web Cache v9.0.3 on Windows 2000 server.
It includes:
     - Oracle HTTP Server
     - Oracle9iAS Containers for J2EE
     - Oracle9iAS Web Cache
     - Oracle Enterprise Manager
The release of installed Oracle9iAS is Release 2 (9.0.3)
Please do reply at the earliest.
Once again thanks and look forward to hear from you.
Regards,
Sandesh

How to test servlet using Junit test????

Hello everybody
Does anybody know how to test an servlet class using Junit without using Cactus test . Is it possible to test a servlet using Junit without cactus test.Plz tell me the process how to test a servlet using Junit test .
Regards
srikant

1) Do yoiu mean how to "run" your servlet code with sample parameter? This call manual testing with a sample run of you code. You need a web server(eg Tomcat), create a webapp with your servlet then deploy it there in order to run it.
2) httpunit and junit are framework to write test case code that can be automated and repeatable. Plz read their doc.
3) Your sample code me a very wrong way to retrieve and convert servlet parameters.
Get a java toturial and servlet tutorial book and read it over the weekend. You need to get at least the basic.

Connecting a servlet using a midlet

Hi,
I am trying to connect to a servlet using a Midlet. The servlet is running fine on Apache Tomcat and I m able to build the MIDlet using J2MEWTK . But when I execute the Midlet on an emulator it shows me some code of html page of which the important line which might give u some hint is :
the requested resource (/hitservlet) is not available.
I wrote the code of HitServlet and Hitmidlet using a pdf on net....Do I need to install something else for executing this? I dont understand where is the problem. Should I post the codes? Is it something related to aliases...as indicated by some some tutorial...if so plss elaborate on it..
If anybdy has any idea ...plss help me get out of this problem...
Thanx
Smeeta

Have you added the URL of the Servlet into the J2ME application?
Settings -> UserDefined Tab
Thinks its
HitMIDlet.URL and its value should be the URL of the Servlet

Debugging servlets using jdb

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