RE: newbie - finding class files

[Stuart MacPherson]

Well actually if you have them in 2 places it can cause terminal errors, and
at the very least will waste time and memory on startup.  Common/lib is not
an ideal solution, but you might want to try it at least to see if it works.
In any case, if you install things like Slide (a Jakarta DMS/CMS
webDAV-based framework), all the webDAV Servlets (and indeed everything
else) goes in common/lib.  Alternatively, have you try putting it inside the
/lib directory of your webapp?  It will then only be accessible to that
webapp tho.


-Original Message-
From: Pike [mailto:[EMAIL PROTECTED] 
Sent: 27 August 2003 00:25
To: Tomcat Users List
Subject: Re: newbie - finding class files

Hi

thanks for your response (sorry about the repeated post - my mistake)

> What's wrong with putting them in CATALINA_HOME/common/lib?

well, nothing. it just sounds very ugly, having the same jar files
running twice in one tomcat, once in server/lib and once in common/lib.
is this how its _normally_ done ?

another point is, tomcat starts complaining about 'bundles' then,
but this may be solvable...

> I found this old thread about extending WebdavServlet,
> in which Andreas Probst notes his webapp cant load classes
> from the $CATALINA_HOME/servlet/lib/ dir.
>
> this url
>   
> http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
> makes it clear why.
>
> but now: how should I  extend WebdavServlet inside my webapp ?
> If i put my own classes in the org.apache.bla package, it can't load
> the classes from my webapp, ofcourse.
>
> should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
> to my webapps /WEB-INF/lib ?
>
>   that should work, but it sounds ugly.
>
>
>
>>
>> On Tue, 16 Jul 2002, Andreas Probst wrote:
>>
>>> Date: Tue, 16 Jul 2002 13:59:49 +0200
>>> From: Andreas Probst <[EMAIL PROTECTED]>
>>> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
>>> To: [EMAIL PROTECTED]
>>> Subject: RE: newbie - finding class files
>>>
>>>
>>>> On Mon, 15 Jul 2002, Andreas Probst wrote:
>>>>
>>>>>
>>>>> Hi all,
>>>>>
>>>>> does Tomcat really look into tomcatdir/server/lib? For me it  seems
>>>>> Tomcat doesn't.
>>>>>
>>>>
>>>> This directory is only visible to the classloader for Tomcat  
>>>> itself, not
>>>> for webapps.  There is a special rule that makes servlet classes in
>>>> package "org.apache.catalina" available to webapps anyway, however,  
>>>> which
>>>> is why the standard WebdavServlet (as well as the other Tomcat  
>>>> features
>>>> that are available via servlets) can be loaded.
>>>>
>>>> Craig
>>>
>>> Thank you Craig.
>>>
>>> Could you please tell more about the rule or give a pointer. The
>>> class-loader-info of the Tomcat-Docu says nothing about the rule, but
>>> says, that "These classes and resources are TOTALLY invisible to web
>>> applications".
>>>
>>
>> Actually, the rule is very simple, and it is there in the docs.  Look  
>> at
>> the picture of the class loader hierarchy in the Tomcat docs:
>>
>>
>> http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader- 
>> howto.html
>>
>> The classes that are visible to a web application are those in the  
>> class
>> loader for that webapp, and any of it's parent class loaders.  In  
>> other
>> words, an application can see the "WebappX" class loader for itself,
>> plus the "Shared", "Common", "System", and "Bootstrap" class loaders.  
>>  It
>> can*not* see the "Catalina" class loader.
>
>

thanks,
*-pike
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Re: newbie - finding class files

[Pike]

Hi

thanks for your response (sorry about the repeated post - my mistake)

What's wrong with putting them in CATALINA_HOME/common/lib?
well, nothing. it just sounds very ugly, having the same jar files
running twice in one tomcat, once in server/lib and once in common/lib.
is this how its _normally_ done ?
another point is, tomcat starts complaining about 'bundles' then,
but this may be solvable...
I found this old thread about extending WebdavServlet,
in which Andreas Probst notes his webapp cant load classes
from the $CATALINA_HOME/servlet/lib/ dir.
this url

http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
makes it clear why.
but now: how should I  extend WebdavServlet inside my webapp ?
If i put my own classes in the org.apache.bla package, it can't load
the classes from my webapp, ofcourse.
should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
to my webapps /WEB-INF/lib ?
  that should work, but it sounds ugly.



On Tue, 16 Jul 2002, Andreas Probst wrote:

Date: Tue, 16 Jul 2002 13:59:49 +0200
From: Andreas Probst <[EMAIL PROTECTED]>
Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: RE: newbie - finding class files

On Mon, 15 Jul 2002, Andreas Probst wrote:

Hi all,

does Tomcat really look into tomcatdir/server/lib? For me it  seems
Tomcat doesn't.
This directory is only visible to the classloader for Tomcat  
itself, not
for webapps.  There is a special rule that makes servlet classes in
package "org.apache.catalina" available to webapps anyway, however,  
which
is why the standard WebdavServlet (as well as the other Tomcat  
features
that are available via servlets) can be loaded.

Craig
Thank you Craig.

Could you please tell more about the rule or give a pointer. The
class-loader-info of the Tomcat-Docu says nothing about the rule, but
says, that "These classes and resources are TOTALLY invisible to web
applications".
Actually, the rule is very simple, and it is there in the docs.  Look  
at
the picture of the class loader hierarchy in the Tomcat docs:

   
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader- 
howto.html

The classes that are visible to a web application are those in the  
class
loader for that webapp, and any of it's parent class loaders.  In  
other
words, an application can see the "WebappX" class loader for itself,
plus the "Shared", "Common", "System", and "Bootstrap" class loaders.  
 It
can*not* see the "Catalina" class loader.


thanks,
*-pike
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RE: newbie - finding class files

[Stuart MacPherson]

What's wrong with putting them in CATALINA_HOME/common/lib?


-Original Message-
From: P.van Kemenade [mailto:[EMAIL PROTECTED] 
Sent: 26 August 2003 16:49
To: Tomcat List
Subject: RE: newbie - finding class files

Hi

I found this old thread about extending WebdavServlet,
in which Andreas Probst notes his webapp cant load classes
from the $CATALINA_HOME/servlet/lib/ dir.

this url

http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
makes it clear why.

but now: how should I  extend WebdavServlet inside my webapp ?
If i put my own classes in the org.apache.bla package, it can't load
the classes from my webapp, ofcourse.

should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
to my webapps /WEB-INF/lib ?

  that should work, but it sounds ugly.



>
> On Tue, 16 Jul 2002, Andreas Probst wrote:
>
> > Date: Tue, 16 Jul 2002 13:59:49 +0200
> > From: Andreas Probst <[EMAIL PROTECTED]>
> > Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> > To: [EMAIL PROTECTED]
> > Subject: RE: newbie - finding class files
> >
> >
> > > On Mon, 15 Jul 2002, Andreas Probst wrote:
> > >
> > > >
> > > > Hi all,
> > > >
> > > > does Tomcat really look into tomcatdir/server/lib? For me it 
> seems
> > > > Tomcat doesn't.
> > > >
> > >
> > > This directory is only visible to the classloader for Tomcat 
> itself, not
> > > for webapps.  There is a special rule that makes servlet classes in
> > > package "org.apache.catalina" available to webapps anyway, 
> however, which
> > > is why the standard WebdavServlet (as well as the other Tomcat 
> features
> > > that are available via servlets) can be loaded.
> > >
> > > Craig
> >
> > Thank you Craig.
> >
> > Could you please tell more about the rule or give a pointer. The
> > class-loader-info of the Tomcat-Docu says nothing about the rule, but
> > says, that "These classes and resources are TOTALLY invisible to web
> > applications".
> >
>
> Actually, the rule is very simple, and it is there in the docs.  Look 
> at
> the picture of the class loader hierarchy in the Tomcat docs:
>
>   http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-> 
> howto.html
>
> The classes that are visible to a web application are those in the 
> class
> loader for that webapp, and any of it's parent class loaders.  In other
> words, an application can see the "WebappX" class loader for itself, 
> plus
> the "Shared", "Common", "System", and "Bootstrap" class loaders.  It 
> can
> *not* see the "Catalina" class loader.


thanks,
*-pike
---
Editorship& Styling 'Techniek is waistline, Publish the plan!'
What make the method strong until for instance one newspaperman who
wish publish and not with technique wish turn troublesome fallen?
The
clientèle with all the bye bye the handshake with examples decrepit.

The
motto: 'Techniek is waistline, publish the plan!'

http://www.worldlanguage.com/Translation.htm 

==
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL",
"SHALL NOT"  "SHOULD", "SHOULD NOT", "RECOMMENDED",
"MAY", and "OPTIONAL" in this document  are to be interpreted
as described in [RFC2119]



"I wasted time, and now doth time waste me.
Or now hath time made me his numb’ring clock:
My thoughts are minutes; and, with sighs, they jar
Their watches on to mine eyes, the outward watch,
Whereto my finger, like a dial’s point,
Is pointing still, in cleansing them from tears."

http://framework.v2.nl/archive/archive/node/text/default.py/nodenr-67731

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To unsubscribe, e-mail: [EMAIL PROTECTED]
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To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: newbie - finding class files

[P . van Kemenade]

Hi

I found this old thread about extending WebdavServlet,
in which Andreas Probst notes his webapp cant load classes
from the $CATALINA_HOME/servlet/lib/ dir.
this url
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
makes it clear why.
but now: how should I  extend WebdavServlet inside my webapp ?
If i put my own classes in the org.apache.bla package, it can't load
the classes from my webapp, ofcourse.
should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
to my webapps /WEB-INF/lib ?
 that should work, but it sounds ugly.



On Tue, 16 Jul 2002, Andreas Probst wrote:

> Date: Tue, 16 Jul 2002 13:59:49 +0200
> From: Andreas Probst <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
>
>
> > On Mon, 15 Jul 2002, Andreas Probst wrote:
> >
> > >
> > > Hi all,
> > >
> > > does Tomcat really look into tomcatdir/server/lib? For me it 
seems
> > > Tomcat doesn't.
> > >
> >
> > This directory is only visible to the classloader for Tomcat 
itself, not
> > for webapps.  There is a special rule that makes servlet classes in
> > package "org.apache.catalina" available to webapps anyway, 
however, which
> > is why the standard WebdavServlet (as well as the other Tomcat 
features
> > that are available via servlets) can be loaded.
> >
> > Craig
>
> Thank you Craig.
>
> Could you please tell more about the rule or give a pointer. The
> class-loader-info of the Tomcat-Docu says nothing about the rule, but
> says, that "These classes and resources are TOTALLY invisible to web
> applications".
>

Actually, the rule is very simple, and it is there in the docs.  Look 
at
the picture of the class loader hierarchy in the Tomcat docs:

  http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-> 
howto.html

The classes that are visible to a web application are those in the 
class
loader for that webapp, and any of it's parent class loaders.  In other
words, an application can see the "WebappX" class loader for itself, 
plus
the "Shared", "Common", "System", and "Bootstrap" class loaders.  It 
can
*not* see the "Catalina" class loader.


thanks,
*-pike
---
Editorship& Styling 'Techniek is waistline, Publish the plan!'
	What make the method strong until for instance one newspaperman who
	wish publish and not with technique wish turn troublesome fallen? The
	clientèle with all the bye bye the handshake with examples decrepit. 
The
	motto: 'Techniek is waistline, publish the plan!'

http://www.worldlanguage.com/Translation.htm 

==
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL",
"SHALL NOT"  "SHOULD", "SHOULD NOT", "RECOMMENDED",
"MAY", and "OPTIONAL" in this document  are to be interpreted
as described in [RFC2119]
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]

RE: newbie - finding class files

[P . van Kemenade]

Hi

I found this old thread about extending WebdavServlet,
in which Andreas Probst notes his webapp cant load classes
from the $CATALINA_HOME/servlet/lib/ dir.
this url
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
makes it clear why.
but now: how should I  extend WebdavServlet inside my webapp ?
If i put my own classes in the org.apache.bla package, it can't load
the classes from my webapp, ofcourse.
should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
to my webapps /WEB-INF/lib ?
 that should work, but it sounds ugly.



On Tue, 16 Jul 2002, Andreas Probst wrote:

> Date: Tue, 16 Jul 2002 13:59:49 +0200
> From: Andreas Probst <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
>
>
> > On Mon, 15 Jul 2002, Andreas Probst wrote:
> >
> > >
> > > Hi all,
> > >
> > > does Tomcat really look into tomcatdir/server/lib? For me it 
seems
> > > Tomcat doesn't.
> > >
> >
> > This directory is only visible to the classloader for Tomcat 
itself, not
> > for webapps.  There is a special rule that makes servlet classes in
> > package "org.apache.catalina" available to webapps anyway, 
however, which
> > is why the standard WebdavServlet (as well as the other Tomcat 
features
> > that are available via servlets) can be loaded.
> >
> > Craig
>
> Thank you Craig.
>
> Could you please tell more about the rule or give a pointer. The
> class-loader-info of the Tomcat-Docu says nothing about the rule, but
> says, that "These classes and resources are TOTALLY invisible to web
> applications".
>

Actually, the rule is very simple, and it is there in the docs.  Look 
at
the picture of the class loader hierarchy in the Tomcat docs:

  http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-> 
howto.html

The classes that are visible to a web application are those in the 
class
loader for that webapp, and any of it's parent class loaders.  In other
words, an application can see the "WebappX" class loader for itself, 
plus
the "Shared", "Common", "System", and "Bootstrap" class loaders.  It 
can
*not* see the "Catalina" class loader.


thanks,
*-pike
---
Editorship& Styling 'Techniek is waistline, Publish the plan!'
	What make the method strong until for instance one newspaperman who
	wish publish and not with technique wish turn troublesome fallen? The
	clientèle with all the bye bye the handshake with examples decrepit. 
The
	motto: 'Techniek is waistline, publish the plan!'

http://www.worldlanguage.com/Translation.htm?

==
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL",
"SHALL NOT"  "SHOULD", "SHOULD NOT", "RECOMMENDED",
"MAY", and "OPTIONAL" in this document  are to be interpreted
as described in [RFC2119]

"I wasted time, and now doth time waste me.
Or now hath time made me his numb’ring clock:
My thoughts are minutes; and, with sighs, they jar
Their watches on to mine eyes, the outward watch,
Whereto my finger, like a dial’s point,
Is pointing still, in cleansing them from tears."
http://framework.v2.nl/archive/archive/node/text/default.py/nodenr-67731

-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]

RE: newbie - finding class files

[P . van Kemenade]

Hi

I found this old thread about extending WebdavServlet,
in which Andreas Probst notes his webapp cant load classes
from the $CATALINA_HOME/servlet/lib/ dir.
this url
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
makes it clear why.
but now: how should I  extend WebdavServlet inside my webapp ?
If i put my own classes in the org.apache.bla package, it can't load
the classes from my webapp, ofcourse.
should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
to my webapps /WEB-INF/lib ?
 that should work, but it sounds ugly.



On Tue, 16 Jul 2002, Andreas Probst wrote:

> Date: Tue, 16 Jul 2002 13:59:49 +0200
> From: Andreas Probst <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
>
>
> > On Mon, 15 Jul 2002, Andreas Probst wrote:
> >
> > >
> > > Hi all,
> > >
> > > does Tomcat really look into tomcatdir/server/lib? For me it  
seems
> > > Tomcat doesn't.
> > >
> >
> > This directory is only visible to the classloader for Tomcat  
itself, not
> > for webapps.  There is a special rule that makes servlet classes in
> > package "org.apache.catalina" available to webapps anyway,  
however, which
> > is why the standard WebdavServlet (as well as the other Tomcat  
features
> > that are available via servlets) can be loaded.
> >
> > Craig
>
> Thank you Craig.
>
> Could you please tell more about the rule or give a pointer. The
> class-loader-info of the Tomcat-Docu says nothing about the rule, but
> says, that "These classes and resources are TOTALLY invisible to web
> applications".
>

Actually, the rule is very simple, and it is there in the docs.  Look  
at
the picture of the class loader hierarchy in the Tomcat docs:

   
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-> howto.html

The classes that are visible to a web application are those in the  
class
loader for that webapp, and any of it's parent class loaders.  In other
words, an application can see the "WebappX" class loader for itself,  
plus
the "Shared", "Common", "System", and "Bootstrap" class loaders.  It  
can
*not* see the "Catalina" class loader.


thanks,
*-pike
---
Editorship& Styling 'Techniek is waistline, Publish the plan!'
	What make the method strong until for instance one newspaperman who
	wish publish and not with technique wish turn troublesome fallen? The
	clientèle with all the bye bye the handshake with examples decrepit.  
The
	motto: 'Techniek is waistline, publish the plan!'

http://www.worldlanguage.com/Translation.htm 

-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]

Re: newbie - finding class files

[P . van Kemenade]

Hi

I found this old thread about extending WebdavServlet,
in which Andreas Probst notes his webapp cant load classes
from the $CATALINA_HOME/servlet/lib/ dir.
this url
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html
makes it clear why.
but now: how should I  extend WebdavServlet inside my webapp ?
If i put my own classes in the org.apache.bla package, it can't load
the classes from my webapp, ofcourse.
should I copy all jar files from  $CATALINA_HOME/servlet/lib/*jar
to my webapps /WEB-INF/lib ?
 that should work, but it sounds ugly.



On Tue, 16 Jul 2002, Andreas Probst wrote:

> Date: Tue, 16 Jul 2002 13:59:49 +0200
> From: Andreas Probst <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
>
>
> > On Mon, 15 Jul 2002, Andreas Probst wrote:
> >
> > >
> > > Hi all,
> > >
> > > does Tomcat really look into tomcatdir/server/lib? For me it 
seems
> > > Tomcat doesn't.
> > >
> >
> > This directory is only visible to the classloader for Tomcat 
itself, not
> > for webapps.  There is a special rule that makes servlet classes in
> > package "org.apache.catalina" available to webapps anyway, 
however, which
> > is why the standard WebdavServlet (as well as the other Tomcat 
features
> > that are available via servlets) can be loaded.
> >
> > Craig
>
> Thank you Craig.
>
> Could you please tell more about the rule or give a pointer. The
> class-loader-info of the Tomcat-Docu says nothing about the rule, but
> says, that "These classes and resources are TOTALLY invisible to web
> applications".
>

Actually, the rule is very simple, and it is there in the docs.  Look 
at
the picture of the class loader hierarchy in the Tomcat docs:

  http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-> 
howto.html

The classes that are visible to a web application are those in the 
class
loader for that webapp, and any of it's parent class loaders.  In other
words, an application can see the "WebappX" class loader for itself, 
plus
the "Shared", "Common", "System", and "Bootstrap" class loaders.  It 
can
*not* see the "Catalina" class loader.


thanks,
*-pike

"I wasted time, and now doth time waste me.
Or now hath time made me his numb’ring clock:
My thoughts are minutes; and, with sighs, they jar
Their watches on to mine eyes, the outward watch,
Whereto my finger, like a dial’s point,
Is pointing still, in cleansing them from tears."
http://framework.v2.nl/archive/archive/node/text/default.py/nodenr-67731



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To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: newbie - finding class files

[Craig R. McClanahan]

On Tue, 16 Jul 2002, Andreas Probst wrote:

> Date: Tue, 16 Jul 2002 13:59:49 +0200
> From: Andreas Probst <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
>
>
> > On Mon, 15 Jul 2002, Andreas Probst wrote:
> >
> > >
> > > Hi all,
> > >
> > > does Tomcat really look into tomcatdir/server/lib? For me it seems
> > > Tomcat doesn't.
> > >
> >
> > This directory is only visible to the classloader for Tomcat itself, not
> > for webapps.  There is a special rule that makes servlet classes in
> > package "org.apache.catalina" available to webapps anyway, however, which
> > is why the standard WebdavServlet (as well as the other Tomcat features
> > that are available via servlets) can be loaded.
> >
> > Craig
>
> Thank you Craig.
>
> Could you please tell more about the rule or give a pointer. The
> class-loader-info of the Tomcat-Docu says nothing about the rule, but
> says, that "These classes and resources are TOTALLY invisible to web
> applications".
>

Actually, the rule is very simple, and it is there in the docs.  Look at
the picture of the class loader hierarchy in the Tomcat docs:

  http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html

The classes that are visible to a web application are those in the class
loader for that webapp, and any of it's parent class loaders.  In other
words, an application can see the "WebappX" class loader for itself, plus
the "Shared", "Common", "System", and "Bootstrap" class loaders.  It can
*not* see the "Catalina" class loader.

Now, go down the page a few inches, and you'll see that the Catalina class
loader contains everything in server/classes and server/lib (including
"servlets-webdav.jar" that contains the WebDAV servlet).

> Bye.
>
> Andreas
>

Craig


> >
> >
> > > On the one hand the original webapp /webdav runs without errors. On
> > > the other hand, when I deploy a class that extends the original
> > > webdav-class org.apache.catalina.servlets.WebdavServlet (located in
> > > catalinahome\server\lib\servlets-webdav.jar) I get an
> > > java.lang.NoClassDefFoundError:
> > > org/apache/catalina/servlets/WebdavServlet.
> > >
> > > When I then copy catalinahome\server\lib\servlets-webdav.jar into
> > > catalinahome\webapps\mywebdav\WEB-INF\lib I get a different
> > > java.lang.NoClassDefFoundError:
> > > org/apache/catalina/servlets/DefaultServlet. DefaultServlet is
> > > located in catalinahome\server\lib\servlets-default.jar. So it seems
> > > Tomcat doesn't look into the catalinahome\server\lib\ directory. But
> > > why then runs the original /webdav app?
> > >
> > > What do I do wrong? Do I have to tell Tomcat somehow to look into the
> > > catalinahome\server\lib\ directory when running my webapp? Or do I
> > > have to copy all needed files from catalinahome\server\lib\ to my
> > > webapp's lib-directory? I suppose this shouldn't be the solution.
> > >
> > > By the way: I'm running Tomcat 4.0.4 on Windows 2000.
> > >
> > > Thanks a lot in advance.
> > >
> > > Andreas
>
>
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RE: newbie - finding class files

[Andreas Probst]

> On Mon, 15 Jul 2002, Andreas Probst wrote:
> 
> >
> > Hi all,
> >
> > does Tomcat really look into tomcatdir/server/lib? For me it seems
> > Tomcat doesn't.
> >
> 
> This directory is only visible to the classloader for Tomcat itself, not
> for webapps.  There is a special rule that makes servlet classes in
> package "org.apache.catalina" available to webapps anyway, however, which
> is why the standard WebdavServlet (as well as the other Tomcat features
> that are available via servlets) can be loaded.
> 
> Craig

Thank you Craig.

Could you please tell more about the rule or give a pointer. The class-loader-info of 
the Tomcat-Docu says nothing about the rule, but says, that "These classes and 
resources are TOTALLY invisible to web applications".

Bye.

Andreas

> 
> 
> > On the one hand the original webapp /webdav runs without errors. On
> > the other hand, when I deploy a class that extends the original
> > webdav-class org.apache.catalina.servlets.WebdavServlet (located in
> > catalinahome\server\lib\servlets-webdav.jar) I get an
> > java.lang.NoClassDefFoundError:
> > org/apache/catalina/servlets/WebdavServlet.
> >
> > When I then copy catalinahome\server\lib\servlets-webdav.jar into
> > catalinahome\webapps\mywebdav\WEB-INF\lib I get a different
> > java.lang.NoClassDefFoundError:
> > org/apache/catalina/servlets/DefaultServlet. DefaultServlet is
> > located in catalinahome\server\lib\servlets-default.jar. So it seems
> > Tomcat doesn't look into the catalinahome\server\lib\ directory. But
> > why then runs the original /webdav app?
> >
> > What do I do wrong? Do I have to tell Tomcat somehow to look into the
> > catalinahome\server\lib\ directory when running my webapp? Or do I
> > have to copy all needed files from catalinahome\server\lib\ to my
> > webapp's lib-directory? I suppose this shouldn't be the solution.
> >
> > By the way: I'm running Tomcat 4.0.4 on Windows 2000.
> >
> > Thanks a lot in advance.
> >
> > Andreas 


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RE: newbie - finding class files

[Andreas Probst]

Hi all,

does Tomcat really look into tomcatdir/server/lib? For me it seems Tomcat doesn't. 

On the one hand the original webapp /webdav runs without errors. On the other hand, 
when I deploy a class that extends the original webdav-class 
org.apache.catalina.servlets.WebdavServlet (located in 
catalinahome\server\lib\servlets-webdav.jar) I get an java.lang.NoClassDefFoundError: 
org/apache/catalina/servlets/WebdavServlet.

When I then copy catalinahome\server\lib\servlets-webdav.jar into 
catalinahome\webapps\mywebdav\WEB-INF\lib I get a different 
java.lang.NoClassDefFoundError: org/apache/catalina/servlets/DefaultServlet. 
DefaultServlet is located in catalinahome\server\lib\servlets-default.jar. So it 
seems Tomcat doesn't look into the catalinahome\server\lib\ directory. But why then 
runs the original /webdav app?

What do I do wrong? Do I have to tell Tomcat somehow to look into the 
catalinahome\server\lib\ directory when running my webapp? Or do I have to copy all 
needed files from catalinahome\server\lib\ to my webapp's lib-directory? I suppose 
this shouldn't be the solution.

By the way: I'm running Tomcat 4.0.4 on Windows 2000.

Thanks a lot in advance.

Andreas Probst

> Brian,
> 
> Tomcat looks for your classes under
> Tomcatdir/webapps/yourapp/WEB-INF/classes and Tomcatdir/common/classes and
> looks for your jars in Tomcatdir/webapps/yourapp/WEB-INF/lib ,
> Tomcatdir/common/lib (and Tomcatdir/server/lib but you shouldn't put your
> stuff in here)
> 
> Andy
> 
> > -Original Message-
> > From: Brian Wolf [mailto:[EMAIL PROTECTED]]
> > Sent: 11 July 2002 22:12
> > To: Tomcat Users List
> > Subject: newbie - finding class files
> >
> >
> > Hi
> >
> > I am having problems with  servlets finding class files. On Windows 98
> > I have the classpath and path environmental variables set to
> > c:\jdk1.4\bin
> > and c:\jdk1.4 respectively. The Servlet works fine when converted to a
> > command line application.
> >
> > -Brian
> >
> > ---
> >
> >
> > Error: 500
> > Location: /examples/servlet/processOptions
> > Internal Servlet Error:
> >
> > java.lang.NoClassDefFoundError:
> > com/sun/java/util/collections/AbstractSequentialList
> >  at org.jdom.input.SAXBuilder.createContentHandler(SAXBuilder.java)
> >  at org.jdom.input.SAXBuilder.build(SAXBuilder.java)
> >
> >
> >
> 
> 
> 



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RE: newbie - finding class files

[Craig R. McClanahan]

On Mon, 15 Jul 2002, Andreas Probst wrote:

> Date: Mon, 15 Jul 2002 13:07:11 +0200
> From: Andreas Probst <[EMAIL PROTECTED]>
> Reply-To: Tomcat Users List <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
>
> Hi all,
>
> does Tomcat really look into tomcatdir/server/lib? For me it seems
> Tomcat doesn't.
>

This directory is only visible to the classloader for Tomcat itself, not
for webapps.  There is a special rule that makes servlet classes in
package "org.apache.catalina" available to webapps anyway, however, which
is why the standard WebdavServlet (as well as the other Tomcat features
that are available via servlets) can be loaded.

Craig


> On the one hand the original webapp /webdav runs without errors. On
> the other hand, when I deploy a class that extends the original
> webdav-class org.apache.catalina.servlets.WebdavServlet (located in
> catalinahome\server\lib\servlets-webdav.jar) I get an
> java.lang.NoClassDefFoundError:
> org/apache/catalina/servlets/WebdavServlet.
>
> When I then copy catalinahome\server\lib\servlets-webdav.jar into
> catalinahome\webapps\mywebdav\WEB-INF\lib I get a different
> java.lang.NoClassDefFoundError:
> org/apache/catalina/servlets/DefaultServlet. DefaultServlet is
> located in catalinahome\server\lib\servlets-default.jar. So it seems
> Tomcat doesn't look into the catalinahome\server\lib\ directory. But
> why then runs the original /webdav app?
>
> What do I do wrong? Do I have to tell Tomcat somehow to look into the
> catalinahome\server\lib\ directory when running my webapp? Or do I
> have to copy all needed files from catalinahome\server\lib\ to my
> webapp's lib-directory? I suppose this shouldn't be the solution.
>
> By the way: I'm running Tomcat 4.0.4 on Windows 2000.
>
> Thanks a lot in advance.
>
> Andreas Probst
>
> > Brian,
> >
> > Tomcat looks for your classes under
> > Tomcatdir/webapps/yourapp/WEB-INF/classes and Tomcatdir/common/classes and
> > looks for your jars in Tomcatdir/webapps/yourapp/WEB-INF/lib ,
> > Tomcatdir/common/lib (and Tomcatdir/server/lib but you shouldn't put your
> > stuff in here)
> >
> > Andy
> >
> > > -Original Message-
> > > From: Brian Wolf [mailto:[EMAIL PROTECTED]]
> > > Sent: 11 July 2002 22:12
> > > To: Tomcat Users List
> > > Subject: newbie - finding class files
> > >
> > >
> > > Hi
> > >
> > > I am having problems with  servlets finding class files. On Windows 98
> > > I have the classpath and path environmental variables set to
> > > c:\jdk1.4\bin
> > > and c:\jdk1.4 respectively. The Servlet works fine when converted to a
> > > command line application.
> > >
> > > -Brian
> > >
> > > ---
> > >
> > >
> > > Error: 500
> > > Location: /examples/servlet/processOptions
> > > Internal Servlet Error:
> > >
> > > java.lang.NoClassDefFoundError:
> > > com/sun/java/util/collections/AbstractSequentialList
> > >  at org.jdom.input.SAXBuilder.createContentHandler(SAXBuilder.java)
> > >  at org.jdom.input.SAXBuilder.build(SAXBuilder.java)
> > >
> > >
> > >
> >
> >
> >
>
>
>
> --
> To unsubscribe, e-mail:   <mailto:[EMAIL PROTECTED]>
> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
>
>


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RE: newbie - finding class files

[Andrew Conrad]

Check this link for more info on class loading.  

http://jakarta.apache.org/tomcat/tomcat-4.0-doc/class-loader-howto.html

But it was my understanding that only Tomcat loads the classes and jars
located in the /server directory.

If you need access to it in your webapp, you have to either put the jar
in yourwebapp/WEB-INF/lib or in the shared library section.

For 4.0.4, shared libraries go in %CATALINA%\lib.  With 4.1.x, they go
in %CATALINA%\shared\lib.

- Andrew

> -Original Message-
> From: Andreas Probst [mailto:[EMAIL PROTECTED]] 
> Sent: Monday, July 15, 2002 7:07 AM
> To: [EMAIL PROTECTED]
> Subject: RE: newbie - finding class files
> 
> 
> Hi all,
> 
> does Tomcat really look into tomcatdir/server/lib? For me it 
> seems Tomcat doesn't.
> 
> On the one hand the original webapp /webdav runs without 
> errors. On the other hand, when I deploy a class that extends 
> the original webdav-class 
> org.apache.catalina.servlets.WebdavServlet (located in
> catalinahome\server\lib\servlets-webdav.jar) I get an
> java.lang.NoClassDefFoundError: 
> org/apache/catalina/servlets/WebdavServlet.
> 
> When I then copy catalinahome\server\lib\servlets-webdav.jar 
> into catalinahome\webapps\mywebdav\WEB-INF\lib I get a different
> java.lang.NoClassDefFoundError: 
> org/apache/catalina/servlets/DefaultServlet. DefaultServlet 
> is located in catalinahome\server\lib\servlets-default.jar. 
> So it seems Tomcat doesn't look into the 
> catalinahome\server\lib\ directory. But why then runs the 
> original /webdav app?
> 
> What do I do wrong? Do I have to tell Tomcat somehow to look 
> into the catalinahome\server\lib\ directory when running my 
> webapp? Or do I have to copy all needed files from 
> catalinahome\server\lib\ to my webapp's lib-directory? I 
> suppose this shouldn't be the solution.
> 
> By the way: I'm running Tomcat 4.0.4 on Windows 2000.
> 
> Thanks a lot in advance.
> 
> Andreas Probst
> 
> > Brian,
> >
> > Tomcat looks for your classes under 
> > Tomcatdir/webapps/yourapp/WEB-INF/classes and 
> Tomcatdir/common/classes 
> > and looks for your jars in Tomcatdir/webapps/yourapp/WEB-INF/lib , 
> > Tomcatdir/common/lib (and Tomcatdir/server/lib but you 
> shouldn't put 
> > your stuff in here)
> >
> > Andy
> >
> > > -Original Message-
> > > From: Brian Wolf [mailto:[EMAIL PROTECTED]]
> > > Sent: 11 July 2002 22:12
> > > To: Tomcat Users List
> > > Subject: newbie - finding class files
> > >
> > >
> > > Hi
> > >
> > > I am having problems with  servlets finding class files. 
> On Windows 
> > > 98 I have the classpath and path environmental variables set to 
> > > c:\jdk1.4\bin and c:\jdk1.4 respectively. The Servlet works fine 
> > > when converted to a command line application.
> > >
> > > -Brian
> > >
> > > ---
> > >
> > >
> > > Error: 500
> > > Location: /examples/servlet/processOptions
> > > Internal Servlet Error:
> > >
> > > java.lang.NoClassDefFoundError: 
> > > com/sun/java/util/collections/AbstractSequentialList
> > >  at 
> org.jdom.input.SAXBuilder.createContentHandler(SAXBuilder.java)
> > >  at org.jdom.input.SAXBuilder.build(SAXBuilder.java)
> > >
> > >
> > >
> >
> >
> >
> 
> 
> 
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> additional commands, 
> e-mail: <mailto:[EMAIL PROTECTED]>
> 
> 

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RE: newbie - finding class files

[Andreas Probst]

Hi all,

does Tomcat really look into tomcatdir/server/lib? For me it seems 
Tomcat doesn't. 

On the one hand the original webapp /webdav runs without errors. On 
the other hand, when I deploy a class that extends the original 
webdav-class org.apache.catalina.servlets.WebdavServlet (located in 
catalinahome\server\lib\servlets-webdav.jar) I get an 
java.lang.NoClassDefFoundError: 
org/apache/catalina/servlets/WebdavServlet.

When I then copy catalinahome\server\lib\servlets-webdav.jar into 
catalinahome\webapps\mywebdav\WEB-INF\lib I get a different 
java.lang.NoClassDefFoundError: 
org/apache/catalina/servlets/DefaultServlet. DefaultServlet is 
located in catalinahome\server\lib\servlets-default.jar. So it seems 
Tomcat doesn't look into the catalinahome\server\lib\ directory. But 
why then runs the original /webdav app?

What do I do wrong? Do I have to tell Tomcat somehow to look into the 
catalinahome\server\lib\ directory when running my webapp? Or do I 
have to copy all needed files from catalinahome\server\lib\ to my 
webapp's lib-directory? I suppose this shouldn't be the solution.

By the way: I'm running Tomcat 4.0.4 on Windows 2000.

Thanks a lot in advance.

Andreas Probst

> Brian,
> 
> Tomcat looks for your classes under
> Tomcatdir/webapps/yourapp/WEB-INF/classes and Tomcatdir/common/classes and
> looks for your jars in Tomcatdir/webapps/yourapp/WEB-INF/lib ,
> Tomcatdir/common/lib (and Tomcatdir/server/lib but you shouldn't put your
> stuff in here)
> 
> Andy
> 
> > -Original Message-
> > From: Brian Wolf [mailto:[EMAIL PROTECTED]]
> > Sent: 11 July 2002 22:12
> > To: Tomcat Users List
> > Subject: newbie - finding class files
> >
> >
> > Hi
> >
> > I am having problems with  servlets finding class files. On Windows 98
> > I have the classpath and path environmental variables set to
> > c:\jdk1.4\bin
> > and c:\jdk1.4 respectively. The Servlet works fine when converted to a
> > command line application.
> >
> > -Brian
> >
> > ---
> >
> >
> > Error: 500
> > Location: /examples/servlet/processOptions
> > Internal Servlet Error:
> >
> > java.lang.NoClassDefFoundError:
> > com/sun/java/util/collections/AbstractSequentialList
> >  at org.jdom.input.SAXBuilder.createContentHandler(SAXBuilder.java)
> >  at org.jdom.input.SAXBuilder.build(SAXBuilder.java)
> >
> >
> >
> 
> 
> 



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RE: newbie - finding class files

[Andy Eastham]

Brian,

Tomcat looks for your classes under
Tomcatdir/webapps/yourapp/WEB-INF/classes and Tomcatdir/common/classes and
looks for your jars in Tomcatdir/webapps/yourapp/WEB-INF/lib ,
Tomcatdir/common/lib (and Tomcatdir/server/lib but you shouldn't put your
stuff in here)

Andy

> -Original Message-
> From: Brian Wolf [mailto:[EMAIL PROTECTED]]
> Sent: 11 July 2002 22:12
> To: Tomcat Users List
> Subject: newbie - finding class files
>
>
> Hi
>
> I am having problems with  servlets finding class files. On Windows 98
> I have the classpath and path environmental variables set to
> c:\jdk1.4\bin
> and c:\jdk1.4 respectively. The Servlet works fine when converted to a
> command line application.
>
> -Brian
>
> ---
>
>
> Error: 500
> Location: /examples/servlet/processOptions
> Internal Servlet Error:
>
> java.lang.NoClassDefFoundError:
> com/sun/java/util/collections/AbstractSequentialList
>  at org.jdom.input.SAXBuilder.createContentHandler(SAXBuilder.java)
>  at org.jdom.input.SAXBuilder.build(SAXBuilder.java)
>
>
>



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