Re: problems running a servlet that uses core catalina classes
Look at the Manager servlet for Tomcat 4 or the admin servlet for Tomcat 3.x.
Regards,
Glenn
Ted Neward wrote:
Glenn, just out of curiosity, how could someone create an administrative
web-app for controlling and administering Tomcat? (One of the things I've
been toying with was the idea of doing just such an administrative
interface--installing new webapps, restarting, viewing statistics,
monitoring the server's progress, and so on.)
Ted Neward
{.NET||Java} Instructor, DevelopMentor (http://www.develop.com)
http://www.javageeks.com/~tneward/index.html
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of Glenn Nielsen
Sent: Tuesday, May 08, 2001 5:12 PM
To: [EMAIL PROTECTED]
Subject: Re: problems running a servlet that uses core catalina classes
In Tomcat 4 the core catalina classes in
servlet/lib/catalina.jar are hidden
from servlets. A servlet should use the standard Servlet 2.3 classes to
access public information for the request. Your servlet would
not be portable
across differenct servlet containers if you used internal servlet
container classes.
In addition, making those interal tomcat classes visible to web
applications
could allow the security of the servlet container and web
applications to be compromised.
Regards,
Glenn
Fabien Le Floc'h wrote:
Hello,
I am sorry to bother you. But I am trying to write a servlet
that uses some core apache classes and I have problems running it.
- If I use a war archive, tomcat does not find the tomcat
classes/servlet classes when it starts the servlet.
(ClassNoDefFound error). If I then add the catalina.jar and
servlet.jar to the classpath, I have a conflict between classes
loaded dynamically by tomcat and classes in the classpath. (More
precisely I have an object whose class is ServletWrapper but is
not an instance of ServletWrapper. This is because (I guess) the
object is created by the Tomcat classloader and it is compared
with an instance of the classpath objects),
- If I put the jar file in the common/lib directory, it finds
the servlet classes but not the tomcat classes.
- If I put the jar file in server/lib directory, it does not
load my servlet.
The only way I can make it work is to put it in the
catalina.jar file. But that is not nice at all.
Could someone help me with this?
Thank you.
Fabien Le Floc'h
P.S.: I was wondering if it was user or developer oriented...
As I want to use core Tomcat classes I thought it was developer
but maybe I am wrong. Then I apologize.
--
--
Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder|
MOREnet System Programming | * if iz ina coment. |
Missouri Research and Education Network | */ |
--
--
--
Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder|
MOREnet System Programming | * if iz ina coment. |
Missouri Research and Education Network | */ |
--
RE: problems running a servlet that uses core catalina classes
Glenn, just out of curiosity, how could someone create an administrative
web-app for controlling and administering Tomcat? (One of the things I've
been toying with was the idea of doing just such an administrative
interface--installing new webapps, restarting, viewing statistics,
monitoring the server's progress, and so on.)
Ted Neward
{.NET||Java} Instructor, DevelopMentor (http://www.develop.com)
http://www.javageeks.com/~tneward/index.html
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of Glenn Nielsen
Sent: Tuesday, May 08, 2001 5:12 PM
To: [EMAIL PROTECTED]
Subject: Re: problems running a servlet that uses core catalina classes
In Tomcat 4 the core catalina classes in
servlet/lib/catalina.jar are hidden
from servlets. A servlet should use the standard Servlet 2.3 classes to
access public information for the request. Your servlet would
not be portable
across differenct servlet containers if you used internal servlet
container classes.
In addition, making those interal tomcat classes visible to web
applications
could allow the security of the servlet container and web
applications to be compromised.
Regards,
Glenn
Fabien Le Floc'h wrote:
Hello,
I am sorry to bother you. But I am trying to write a servlet
that uses some core apache classes and I have problems running it.
- If I use a war archive, tomcat does not find the tomcat
classes/servlet classes when it starts the servlet.
(ClassNoDefFound error). If I then add the catalina.jar and
servlet.jar to the classpath, I have a conflict between classes
loaded dynamically by tomcat and classes in the classpath. (More
precisely I have an object whose class is ServletWrapper but is
not an instance of ServletWrapper. This is because (I guess) the
object is created by the Tomcat classloader and it is compared
with an instance of the classpath objects),
- If I put the jar file in the common/lib directory, it finds
the servlet classes but not the tomcat classes.
- If I put the jar file in server/lib directory, it does not
load my servlet.
The only way I can make it work is to put it in the
catalina.jar file. But that is not nice at all.
Could someone help me with this?
Thank you.
Fabien Le Floc'h
P.S.: I was wondering if it was user or developer oriented...
As I want to use core Tomcat classes I thought it was developer
but maybe I am wrong. Then I apologize.
--
--
Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder|
MOREnet System Programming | * if iz ina coment. |
Missouri Research and Education Network | */ |
--
RE: problems running a servlet that uses core catalina classes
On Fri, 11 May 2001, Ted Neward wrote:
Glenn, just out of curiosity, how could someone create an administrative
web-app for controlling and administering Tomcat? (One of the things I've
been toying with was the idea of doing just such an administrative
interface--installing new webapps, restarting, viewing statistics,
monitoring the server's progress, and so on.)
In tomcat3.3 - we have the trusted attribute, that allows an web
application to:
- see all internal classes
- get a reference to the real request/context ( using an attribute to
bypass the facade )
That's how the admin/ app works.
I don't know how this is done in 4.0, I suppose they have a similar
mechanism.
Costin
Ted Neward
{.NET||Java} Instructor, DevelopMentor (http://www.develop.com)
http://www.javageeks.com/~tneward/index.html
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of Glenn Nielsen
Sent: Tuesday, May 08, 2001 5:12 PM
To: [EMAIL PROTECTED]
Subject: Re: problems running a servlet that uses core catalina classes
In Tomcat 4 the core catalina classes in
servlet/lib/catalina.jar are hidden
from servlets. A servlet should use the standard Servlet 2.3 classes to
access public information for the request. Your servlet would
not be portable
across differenct servlet containers if you used internal servlet
container classes.
In addition, making those interal tomcat classes visible to web
applications
could allow the security of the servlet container and web
applications to be compromised.
Regards,
Glenn
Fabien Le Floc'h wrote:
Hello,
I am sorry to bother you. But I am trying to write a servlet
that uses some core apache classes and I have problems running it.
- If I use a war archive, tomcat does not find the tomcat
classes/servlet classes when it starts the servlet.
(ClassNoDefFound error). If I then add the catalina.jar and
servlet.jar to the classpath, I have a conflict between classes
loaded dynamically by tomcat and classes in the classpath. (More
precisely I have an object whose class is ServletWrapper but is
not an instance of ServletWrapper. This is because (I guess) the
object is created by the Tomcat classloader and it is compared
with an instance of the classpath objects),
- If I put the jar file in the common/lib directory, it finds
the servlet classes but not the tomcat classes.
- If I put the jar file in server/lib directory, it does not
load my servlet.
The only way I can make it work is to put it in the
catalina.jar file. But that is not nice at all.
Could someone help me with this?
Thank you.
Fabien Le Floc'h
P.S.: I was wondering if it was user or developer oriented...
As I want to use core Tomcat classes I thought it was developer
but maybe I am wrong. Then I apologize.
--
--
Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder|
MOREnet System Programming | * if iz ina coment. |
Missouri Research and Education Network | */ |
--
problems running a servlet that uses core catalina classes
Hello, I am sorry to bother you. But I am trying to write a servlet that uses some core apache classes and I have problems running it. - If I use a war archive, tomcat does not find the tomcat classes/servlet classes when it starts the servlet. (ClassNoDefFound error). If I then add the catalina.jar and servlet.jar to the classpath, I have a conflict between classes loaded dynamically by tomcat and classes in the classpath. (More precisely I have an object whose class is ServletWrapper but is not an instance of ServletWrapper. This is because (I guess) the object is created by the Tomcat classloader and it is compared with an instance of the classpath objects), - If I put the jar file in the common/lib directory, it finds the servlet classes but not the tomcat classes. - If I put the jar file in server/lib directory, it does not load my servlet. The only way I can make it work is to put it in the catalina.jar file. But that is not nice at all. Could someone help me with this? Thank you. Fabien Le Floc'h P.S.: I was wondering if it was user or developer oriented... As I want to use core Tomcat classes I thought it was developer but maybe I am wrong. Then I apologize.
Re: problems running a servlet that uses core catalina classes
In Tomcat 4 the core catalina classes in servlet/lib/catalina.jar are hidden from servlets. A servlet should use the standard Servlet 2.3 classes to access public information for the request. Your servlet would not be portable across differenct servlet containers if you used internal servlet container classes. In addition, making those interal tomcat classes visible to web applications could allow the security of the servlet container and web applications to be compromised. Regards, Glenn Fabien Le Floc'h wrote: Hello, I am sorry to bother you. But I am trying to write a servlet that uses some core apache classes and I have problems running it. - If I use a war archive, tomcat does not find the tomcat classes/servlet classes when it starts the servlet. (ClassNoDefFound error). If I then add the catalina.jar and servlet.jar to the classpath, I have a conflict between classes loaded dynamically by tomcat and classes in the classpath. (More precisely I have an object whose class is ServletWrapper but is not an instance of ServletWrapper. This is because (I guess) the object is created by the Tomcat classloader and it is compared with an instance of the classpath objects), - If I put the jar file in the common/lib directory, it finds the servlet classes but not the tomcat classes. - If I put the jar file in server/lib directory, it does not load my servlet. The only way I can make it work is to put it in the catalina.jar file. But that is not nice at all. Could someone help me with this? Thank you. Fabien Le Floc'h P.S.: I was wondering if it was user or developer oriented... As I want to use core Tomcat classes I thought it was developer but maybe I am wrong. Then I apologize. -- -- Glenn Nielsen [EMAIL PROTECTED] | /* Spelin donut madder| MOREnet System Programming | * if iz ina coment. | Missouri Research and Education Network | */ | --
