Re: What goes where?

[Oliver Meyn]

Hi Eric,

On Sat, 2003-12-13 at 16:16, Eric SCHULTZ wrote:
> As I understand struts.jar needs to remain in the WEB-INF/lib directory; I
> assume struts-legacy.jar should stay there too.  But can all my commons jars
> go in the common/lib directory?  Should those not already in common/lib go
> in shared/lib?
> 
> I realise some people advocate putting everything the app needs in its
> WEB-INF/lib directory; and I agree with that if I have version dependancies,
> but I don't.  And I already have to put my JDBC drivers in common/lib to use
> Tomcat's JNDI datasources so I've already started down that path.
> 
I'm not sure what the real answer is, but the fact that you're using
JNDI apparently reduces your choices a bit.  The JNDI-DataSources-Howto
explicitly says to put all your commons connection pooling stuff in
common/lib and not WEB-INF/lib.  Where that leaves some of the other
apparently common (and commons-) things isn't clear to me.

HTH,
Oliver


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Re: getServletContext() throws null pointer

[Oliver Meyn]

On Wed, 2003-12-10 at 12:55, Richard Yee wrote:
> Oliver,
> In the last email I sent, I should have asked if you
> overrode the init(ServletConfig) method in the servlet
> that is having the null pointer exception, not your
> init servlet.
> 
Oh I see - sorry but before testing Claire's hypothesis I hadn't touched
the init() methods.

Thanks,
Oliver


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Re: getServletContext() throws null pointer

[Oliver Meyn]

On Wed, 2003-12-10 at 12:50, Claire Wall wrote:
> as i understand it, in order to retrieve the servlet context, you need to
> use the ServletConfig to retrieve it like so:
> 
> config.getServletContext()
> 
> 
> this sounds similar to a problem that i had where i was trying to log
> something from a servlet, just used the log() method and it through an
> exception pretty much like the one you are experiencing. however, by putting
> config.getServletContext().log() it threw no exceptions...
> 
Hmm.  It appears that the ServletConfig is only accessible to the init()
of a given servlet.  Within the init() I can getServletConfig() and it
appears not to be null, and I can getServletConfig.getServletContext()
but that IS null.  So no exception but a null context that leaves me in
about the same boat.  Calling getServletContext() directly within the
init() also gives me null. This happens with and without a call to
super.init().

This can't be that hard.  Is there some extra step to tying an arbitrary
servlet to a webapp context apart from calling it from within that
context (eg Action within context calls the new servlet)?

Thanks,
Oliver


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Re: getServletContext() throws null pointer

[Oliver Meyn]

On Wed, 2003-12-10 at 12:18, Richard Yee wrote:
> Oliver,
> Are you overriding init(ServletConfig config) in your
> init servlet? If so, did you call super.init(config)
> before you tried accessing the ServletContext?
> 
I'm not overriding init(config) but I am overriding init().  I hadn't
been calling super.init() but gave that a shot and no change.  I am able
to access the ServletContext (and the init-ed object) from both my
controlling Action and from a jsp - just not from another servlet.  I
must be missing something simple yet fundamental...

Thanks,
Oliver



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RE: getServletContext() throws null pointer

[Oliver Meyn]

On Wed, 2003-12-10 at 12:12, Trieu, Danny wrote:
> Constructor is the answer to your problem.  There are no guarantee that the
> servlet that set the data will be loaded before the servlet that accessing
> it.
> 
I'm attempting to make that guarantee but I can see how the servlets
might not care.  Further testing reveals that the contructor is not the
problem, though, since putting the lookup in a separate function called
after construction also fails.  Other thoughts?

Thanks,
Oliver


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getServletContext() throws null pointer

[Oliver Meyn]

Hi,

I've put an object into the ServletContext with an init servlet started
on load via web.xml.  Accessing it with my main Action works fine, but
when I try to use another servlet (extend HttpServlet) to
getServletContext() it throws a null pointer exception (doesn't just
return null - goes straight to the exception).  From the javadoc on
ServletContext I'm led to believe that all servlets in the app share the
same ServletContext, so I'm confused.  I'm attempting this lookup in the
constructor of the servlet - does it have to happen in a doGet or such? 
Any ideas?

Also, is there some way of accessing the ServletContext without being a
Servlet?

Thanks very much,
Oliver


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Re: MySql BasicDataSource Connection

[Oliver Meyn]

Hi All,

After a similar struggle to the original poster I managed to get the
BasicDataSource to work, but I wonder about the properties you're
setting below - the javadoc on BasicDataSource doesn't mention maxCount
or minCount (I gather maxActive and minIdle are their equivalents) so
are those lines doing anything in your config?  It's a bit tricky to
test, but of course a useful feature.

Thanks,
Oliver

On Mon, 2003-11-17 at 23:11, Gede Indrawan wrote:
> I use data-source defintion below and no problem with it
>   
> value="org.gjt.mm.mysql.Driver"/>
>
>
>
>
>
>   



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RE: deprecation error moving from Tomcat 4.0.4 to 4.1.18?

[Oliver Meyn]

Thank you Michael!

Of course it's something perfectly obvious that I should have tried as step
one, but that would certainly have been too easy, and besides, I had too
much hair anyway.  *sigh*

Thanks again,
Oliver

> -Original Message-
> From: Michael Santos [mailto:[EMAIL PROTECTED]
> Sent: March 25, 2003 23:13
> To: Struts Users Mailing List
> Subject: Re: deprecation error moving from Tomcat 4.0.4 to 4.1.18?
>
>
> OK, to me it seems to be something related to Tomcat. Try using
>  page="<%= includePage.toString() %>" flush="true" /> instead.
>
> []s
> --
> Michael Nascimento Santos
> Sun Certified Programmer for the Java 2 Platform
> Sun Certified Programmer for the Java 2 Platform 1.4
> Sun Certified Web Component Developer for J2EE
> Moderador SouJava - www.soujava.org.br
>
> - Original Message -
> From: "Oliver Meyn" <[EMAIL PROTECTED]>
> To: "STRUTS" <[EMAIL PROTECTED]>
> Sent: Tuesday, March 25, 2003 6:33 PM
> Subject: deprecation error moving from Tomcat 4.0.4 to 4.1.18?
>
>
> > Hi all,
> >
> > Code that has worked fine under Struts 1.1 rc1 in Tomcat 4.0.4 is now
> > failing in 4.1.18 (j2sdk1.4.1_02).  Other servlets made the
> switch ok, but
> > when I try to  the page fails
> with
> > a somewhat cryptic error as below:
> >
> > [ERROR]
> > org.apache.jasper.JasperException: Unable to compile class for JSP
> >
> > An error occurred at line: 39 in the jsp file: /data/statistics.jsp
> >
> > Generated servlet error:
> > [javac] Compiling 1 source file
> >
> > C:\jakarta-tomcat-4.1.18\\data\statistics_jsp.java:136:
> >
> include(javax.servlet.http.HttpServletRequest,javax.servlet.http.H
> ttpServlet
> > Response,java.lang.String,javax.servlet.jsp.JspWriter,boolean) in
> > org.apache.jasper.runtime.JspRuntimeLibrary cannot be applied to
> >
> (javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServ
> letRespons
> > e,java.lang.Object,javax.servlet.jsp.JspWriter,boolean)
> >   JspRuntimeLibrary.include(request, response,
> includePage , out,
> > true);
> >^
> > An error occurred at line: 39 in the jsp file: /data/statistics.jsp
> > Generated servlet error:
> > Note:
> C:\jakarta-tomcat-4.1.18\\data\statistics_jsp.java uses or
> > overrides a deprecated API.
> > Note: Recompile with -deprecation for details.
> > 1 error
> > [/ERROR]
> >
> > This is the code that generates it:
> > [CODE]
> > 
> > 
> > 
> > 
> > [/CODE]
> >
> > The bean:define line is #39 referenced in the error, but I think it must
> be
> > miscounting since if I remove the jsp:include line it works fine (well,
> > compiles fine).
> >
> > Any ideas on what's causing this?  Is there a newer version of
> some spec I
> > should be writing to for 4.1.18 as opposed to 4.0.4?
> >
> > I know the includePage is coming back correctly because just printing it
> out
> > shows that it is correct.  One of the possibilities for includePage is a
> > trivial Coming Soon page, and if I define some variable foo =
> > "comingsoon.jsp" (same as passed back) and place it in the
> include instead
> > of includePage, it _works fine_.  This must be something in the
> interaction
> > of the bean and the include, but I can't figure it out.
> >
> > Hoping it's something obvious,
> > Oliver
> >
> > ps same error on Linux/Apache
> >
> > 
> > Oliver Meyn
> > [EMAIL PROTECTED]
> > "Things should be made as simple as possible, but no simpler." - Albert
> > Einstein
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
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deprecation error moving from Tomcat 4.0.4 to 4.1.18?

[Oliver Meyn]

Hi all,

Code that has worked fine under Struts 1.1 rc1 in Tomcat 4.0.4 is now
failing in 4.1.18 (j2sdk1.4.1_02).  Other servlets made the switch ok, but
when I try to  the page fails with
a somewhat cryptic error as below:

[ERROR]
org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 39 in the jsp file: /data/statistics.jsp

Generated servlet error:
[javac] Compiling 1 source file

C:\jakarta-tomcat-4.1.18\\data\statistics_jsp.java:136:
include(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServlet
Response,java.lang.String,javax.servlet.jsp.JspWriter,boolean) in
org.apache.jasper.runtime.JspRuntimeLibrary cannot be applied to
(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletRespons
e,java.lang.Object,javax.servlet.jsp.JspWriter,boolean)
  JspRuntimeLibrary.include(request, response,  includePage , out,
true);
   ^
An error occurred at line: 39 in the jsp file: /data/statistics.jsp
Generated servlet error:
Note: C:\jakarta-tomcat-4.1.18\\data\statistics_jsp.java uses or
overrides a deprecated API.
Note: Recompile with -deprecation for details.
1 error
[/ERROR]

This is the code that generates it:
[CODE]




[/CODE]

The bean:define line is #39 referenced in the error, but I think it must be
miscounting since if I remove the jsp:include line it works fine (well,
compiles fine).

Any ideas on what's causing this?  Is there a newer version of some spec I
should be writing to for 4.1.18 as opposed to 4.0.4?

I know the includePage is coming back correctly because just printing it out
shows that it is correct.  One of the possibilities for includePage is a
trivial Coming Soon page, and if I define some variable foo =
"comingsoon.jsp" (same as passed back) and place it in the include instead
of includePage, it _works fine_.  This must be something in the interaction
of the bean and the include, but I can't figure it out.

Hoping it's something obvious,
Oliver

ps same error on Linux/Apache

****
Oliver Meyn
[EMAIL PROTECTED]
"Things should be made as simple as possible, but no simpler." - Albert
Einstein


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Cannot find ActionMappings or ActionFormBeans collection

[Oliver Meyn]

Hi all,

Could someone please tell me what throws this exception, and why?  It seems
completely arbitrary - adding an action to action-mappings sometimes works
and sometimes causes this to be thrown.  If it's being thrown and I undo any
changes to struts-config since it worked, it still gets thrown.  You can
guess how frustrating that is...  The archives haven't been much help :(

javax.servlet.ServletException: Cannot find ActionMappings or
ActionFormBeans collection

struts 1.1b2, tomcat 4.0.4, j2sdk1.4.1_01, win2k, iis

Thanks very much,
Oliver

********
Oliver Meyn
[EMAIL PROTECTED]
(416) 524-2240
"Things should be made as simple as possible, but no simpler." - Albert
Einstein


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and param based navigation

[Oliver Meyn]

Hi all,

My problem is that every view in my app needs to be bookmarkable and
emailable.  I figure that means the url needs to uniquely identify where you
are in the app, and that the way to do that is with parameters (ie
example.com/page.jsp?thing1=1&thing2=2 etc).  I'm open to other suggestions,
but here's the problem with this way, as I see it:

I need every click to change it's own parameter to reflect where the click
came from, so if we have a page where we've navigated down to where we're
looking at male population aged 40-65 for our city, then we can click on the
Bar Graph link and we switch from our current text table to the graphical
view.  I'm imagining that as a link that changes the View param from value
Table to value Bar, while leaving the others (ie Data=census, Nbhd=city,
etc) alone.

I think this could be done by using the forward of  and having
some kind of fancy ActionForward to keep track of where the click came from,
and the state of the rest of the params (maybe by using another bean).  I
could be way off, and in either case I could really use some help.  Is this
the best way to handle param based navigation, or more generally, this
problem?

Thanks very much,
Oliver

ps there will be forms involved as well, using get (I imagine) to identify
what choices the user made, so the param line will have to be shared by both
the links and the forms


Oliver Meyn
[EMAIL PROTECTED]
(416) 524-2240
"Things should be made as simple as possible, but no simpler." - Albert
Einstein


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Newbie logic:iterator question

[Oliver Meyn]

This thread existed a few weeks ago, according to the archives, where I
found this suggested example for how to get iterator working (from Alexis
Gallagher):







which appears to be the same idea as used in the struts-example, but I can't
get this to work, as it fails with the error:

Cannot find bean item in scope null

Similar attempts with my own beans also fail (as does explicitly setting the
scope, where the error just becomes "... item in scope application" or
whatever scope is specified).

Any suggestions?

Thanks very much,
Oliver


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