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Subject: RE: (newbie question) missing classs file?
Date: Tue, 18 Aug 2009 12:36:53 -0700
Message-ID: <FE44E0D7EAD2ED4BB2165071DB8E328C04E84CA4@egcrc-ex01.egcrc.org>
Thread-Topic: (newbie question) missing classs file?
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From: "Tena Sakai" <tsakai@gallo.ucsf.edu>
To: "Tomcat Users List" <users@tomcat.apache.org>,
	"Tomcat Users List" <users@tomcat.apache.org>

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Hi David,

> you'd have to reload the webapp to make the change show.

Would you mind telling me how I would do that?

I just restarted tomcat and hit the same pages.
No changes.  I mean it shows double "Hello!" and
I see no class file generated anywhere under
$CATALINA_HOME/webapps/sample directory.

Tena

-----Original Message-----
From: David Smith [mailto:dns4@cornell.edu]
Sent: Tue 8/18/2009 12:31 PM
To: Tomcat Users List
Subject: Re: (newbie question) missing classs file?
=20
I believe once a servlet is initialized in memory, it stays in and is
re-used over and over.  After removing the class, you'd have to reload
the webapp to make the change show.

--David

Daniele Development-ML wrote:
> Consider also that once the application is loaded is memory, even if =
you
> cancel the classes, the application still works.
> I doubt that the JVM maintains in memory all the classes, all the =
times, but
> if your current usage of the heap is not ridiculous big, probably your =
class
> remains loaded.
>
> Dan
>
> On Tue, Aug 18, 2009 at 8:00 PM, Tena Sakai <tsakai@gallo.ucsf.edu> =
wrote:
>
>  =20
>> Hi Dan,
>>
>>    =20
>>> Are you reloading the pages from the server with the shift key?
>>> The pages might be locally cached from your browser.
>>>      =20
>> Shift or no shift, it makes no difference.
>> I told my browser to dump the cache then hit pages again.
>> No difference.
>>
>> I doubt this is a cache issue.  If that's the case, why does
>> it reflect my hack (double "Hello!") and no class file?
>>
>> I am confused.
>>
>> Tena
>>
>>
>> -----Original Message-----
>> From: Daniele Development-ML [mailto:daniele.dml@googlemail.com]
>> Sent: Tue 8/18/2009 11:51 AM
>> To: Tomcat Users List
>> Subject: Re: (newbie question) missing classs file?
>>
>> Are you reloading the pages from the server with the shift key?
>>
>> The pages might be locally cached from your browser.
>>
>> Dan
>>
>> On Tue, Aug 18, 2009 at 7:48 PM, Tena Sakai <tsakai@gallo.ucsf.edu> =
wrote:
>>
>>    =20
>>> Hi,
>>>
>>> I am new to tomcat and jsp.  I appologize in advance my lack of
>>>      =20
>> knowledge,
>>    =20
>>> but I would appreciate some poninters.
>>>
>>> I am running tomcat 6.0.14 on redhat linux.
>>>
>>> After reading a few pages of documentation, I tried:
>>> http://localhost:8080/sample
>>>
>>> It rendered what's in $CATALINA_HOME/webapps/sample/index.html,
>>> which included 2 hyperlinks: "JSP page" and "servlet".  Both
>>> links worked fine.
>>>
>>> Then I found a file
>>> $CATALINA_HOME/webapps/sample/WEB-INF/classes/mypackage/Hello.class.
>>> I removed this class file and hit the same url as before (
>>> http://localhost:8080/sample),
>>> and each of the "JSP page" and "servlet", expecting the error from
>>>      =20
>> tomcat.
>>    =20
>>> To my amazement, they both worked.
>>>
>>> Question number 1: Where is the executable class file?
>>>
>>> Then I went on to modify hello.jsp in $CATALINA_HOME/webapps/sample
>>> directory.
>>> I added extra string "Hello!" to what used to be:
>>> <%=3D new String("Hello!") %>
>>>
>>> Tomcat gave me what I expected: double Hello's.
>>> I thought it might have generated a class file.  But there is no =
class
>>>      =20
>> file
>>    =20
>>> anywhere under $CATALINA_HOME/webapps/sample directory?
>>>
>>> Question number 2: Why does this work?
>>>
>>> Thank you in advance.
>>>
>>> Regards,
>>>
>>> Tena Sakai
>>> tsakai@gallo.ucsf.edu
>>>
>>>      =20


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