Global Variables

[Duncan]

Is there a way to set global variables in the web.xml which can be read
by any JSP page?

Cheers,
-Duncan


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Re: Global Variables

[Jardin Xavier]

use


 param
value


in the web.xml

and String param = servletContext.getInitParameter("param");

in the JSP.


- Original Message - 
From: "Duncan" <[EMAIL PROTECTED]>
To: "Tomcat User List" <[EMAIL PROTECTED]>
Sent: Wednesday, December 03, 2003 5:08 PM
Subject: Global Variables


> Is there a way to set global variables in the web.xml which can be read
> by any JSP page?
> 
> Cheers,
> -Duncan
> 
> 
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> For additional commands, e-mail: [EMAIL PROTECTED]
> 
> 

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RE: Global Variables

[Shapira, Yoav]

Howdy,
Yeah,  parameters are available to all resources within
the context (servlets, JSPs, filters, listeners, etc) for the lifetime
of the application.

Yoav Shapira
Millennium ChemInformatics


>-Original Message-
>From: Duncan [mailto:[EMAIL PROTECTED]
>Sent: Wednesday, December 03, 2003 11:08 AM
>To: Tomcat User List
>Subject: Global Variables
>
>Is there a way to set global variables in the web.xml which can be read
>by any JSP page?
>
>Cheers,
>-Duncan
>
>
>-
>To unsubscribe, e-mail: [EMAIL PROTECTED]
>For additional commands, e-mail: [EMAIL PROTECTED]




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Re: Global Variables

[Duncan]

Thanks for the replies, but what do I define servletContext as?

Many thanks
Duncan

Jardin Xavier wrote:

> use
>
> 
>  param
> value
> 
>
> in the web.xml
>
> and String param = servletContext.getInitParameter("param");
>
> in the JSP.
>
> - Original Message -
> From: "Duncan" <[EMAIL PROTECTED]>
> To: "Tomcat User List" <[EMAIL PROTECTED]>
> Sent: Wednesday, December 03, 2003 5:08 PM
> Subject: Global Variables
>
> > Is there a way to set global variables in the web.xml which can be read
> > by any JSP page?
> >
> > Cheers,
> > -Duncan
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
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> To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: Global Variables

[Shapira, Yoav]

Howdy,
Are you serious? ;)  You might want to buy a servlets book or go through
a tutorial, this is a very basic concept.

You don't define a servlet context, the server creates one for you.  You
define context parameters in your deployment descriptor, the web.xml
file.

Yoav Shapira
Millennium ChemInformatics


>-Original Message-
>From: Duncan [mailto:[EMAIL PROTECTED]
>Sent: Wednesday, December 03, 2003 11:50 AM
>To: Tomcat Users List
>Subject: Re: Global Variables
>
>Thanks for the replies, but what do I define servletContext as?
>
>Many thanks
>Duncan
>
>Jardin Xavier wrote:
>
>> use
>>
>> 
>>  param
>> value
>> 
>>
>> in the web.xml
>>
>> and String param = servletContext.getInitParameter("param");
>>
>> in the JSP.
>>
>> - Original Message -
>> From: "Duncan" <[EMAIL PROTECTED]>
>> To: "Tomcat User List" <[EMAIL PROTECTED]>
>> Sent: Wednesday, December 03, 2003 5:08 PM
>> Subject: Global Variables
>>
>> > Is there a way to set global variables in the web.xml which can be
read
>> > by any JSP page?
>> >
>> > Cheers,
>> > -Duncan
>> >
>> >
>> >
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>> > To unsubscribe, e-mail: [EMAIL PROTECTED]
>> > For additional commands, e-mail:
[EMAIL PROTECTED]
>> >
>> >
>>
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>> To unsubscribe, e-mail: [EMAIL PROTECTED]
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>
>
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Re: Global Variables

[Ben Souther]

Here is is added to the default web.xml file that shipps in the 
TOMCAT_HOME/webapps/ROOT/WEB-INF/web.xml file






http://java.sun.com/dtd/web-app_2_3.dtd";>


  Welcome to Tomcat
  
 Welcome to Tomcat
  



 param
value



















On Wednesday 03 December 2003 11:50 am, Duncan wrote:
> Thanks for the replies, but what do I define servletContext as?
>
> Many thanks
> Duncan
>
> Jardin Xavier wrote:
> > use
> >
> > 
> >  param
> > value
> > 
> >
> > in the web.xml
> >
> > and String param = servletContext.getInitParameter("param");
> >
> > in the JSP.
> >
> > - Original Message -
> > From: "Duncan" <[EMAIL PROTECTED]>
> > To: "Tomcat User List" <[EMAIL PROTECTED]>
> > Sent: Wednesday, December 03, 2003 5:08 PM
> > Subject: Global Variables
> >
> > > Is there a way to set global variables in the web.xml which can be read
> > > by any JSP page?
> > >
> > > Cheers,
> > > -Duncan
> > >
> > >
> > > -
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> > -
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-- 
Ben Souther
F.W. Davison & Company, Inc.



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RE: Global Variables

[Kannan Sundararajan]

in the JSP..

-Original Message-
From: Duncan [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 03, 2003 11:50 AM
To: Tomcat Users List
Subject: Re: Global Variables


Thanks for the replies, but what do I define servletContext as?

Many thanks
Duncan

Jardin Xavier wrote:

> use
>
> 
>  param
> value
> 
>
> in the web.xml
>
> and String param = servletContext.getInitParameter("param");
>
> in the JSP.
>
> - Original Message -
> From: "Duncan" <[EMAIL PROTECTED]>
> To: "Tomcat User List" <[EMAIL PROTECTED]>
> Sent: Wednesday, December 03, 2003 5:08 PM
> Subject: Global Variables
>
> > Is there a way to set global variables in the web.xml which can be read
> > by any JSP page?
> >
> > Cheers,
> > -Duncan
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]


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RE: Global Variables

[Kannan Sundararajan]

Sorry, if you are trying to define "servletContext" , please refer any JSP
book. 

-Original Message-
From: Duncan [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 03, 2003 11:50 AM
To: Tomcat Users List
Subject: Re: Global Variables


Thanks for the replies, but what do I define servletContext as?

Many thanks
Duncan

Jardin Xavier wrote:

> use
>
> 
>  param
> value
> 
>
> in the web.xml
>
> and String param = servletContext.getInitParameter("param");
>
> in the JSP.
>
> - Original Message -
> From: "Duncan" <[EMAIL PROTECTED]>
> To: "Tomcat User List" <[EMAIL PROTECTED]>
> Sent: Wednesday, December 03, 2003 5:08 PM
> Subject: Global Variables
>
> > Is there a way to set global variables in the web.xml which can be read
> > by any JSP page?
> >
> > Cheers,
> > -Duncan
> >
> >
> > -
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]


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Re: Global Variables

[Christopher Schultz]

Duncan,

and String param = servletContext.getInitParameter("param");
>
Thanks for the replies, but what do I define servletContext as?
In every JSP, the ServletContext object is implicitly declared with the 
identifier "application".

So, you should just be able to do something like this in your JSP:


   my_param = <%= application.getInitParameter("my_param") %>

-chris



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RE: Global Variables

[Ilari Kontinen]

> -Original Message-
> From: Duncan [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, December 03, 2003 11:50 AM
> To: Tomcat Users List
> Subject: Re: Global Variables
> 
> 
> Thanks for the replies, but what do I define servletContext as?
> 

An easy way to get the ServletContext from JSP-page is to use the
Servlet-method getServletContext(). So for getting the context
parameter, add the following code-snipped:

<% String param = getServletContext().getInitParameter("param"); %>

And for then on, you can reference it e.g. by:

<%= param %>

> Many thanks
> Duncan
> 
> Jardin Xavier wrote:
> 
> > use
> >
> > 
> >  param
> > value
> > 
> >
> > in the web.xml
> >
> > and String param = servletContext.getInitParameter("param");
> >
> > in the JSP.
> >
> > - Original Message -
> > From: "Duncan" <[EMAIL PROTECTED]>
> > To: "Tomcat User List" <[EMAIL PROTECTED]>
> > Sent: Wednesday, December 03, 2003 5:08 PM
> > Subject: Global Variables
> >
> > > Is there a way to set global variables in the web.xml which can be read
> > > by any JSP page?
> > >
> > > Cheers,
> > > -Duncan


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Re: Global Variables

[Duncan]

Cool.

Thanks for the replies all.

Cheers
- Duncan

Ilari Kontinen wrote:

> > -Original Message-
> > From: Duncan [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, December 03, 2003 11:50 AM
> > To: Tomcat Users List
> > Subject: Re: Global Variables
> >
> >
> > Thanks for the replies, but what do I define servletContext as?
> >
>
> An easy way to get the ServletContext from JSP-page is to use the
> Servlet-method getServletContext(). So for getting the context
> parameter, add the following code-snipped:
>
> <% String param = getServletContext().getInitParameter("param"); %>
>
> And for then on, you can reference it e.g. by:
>
> <%= param %>
>
> > Many thanks
> > Duncan
> >
> > Jardin Xavier wrote:
> >
> > > use
> > >
> > > 
> > >  param
> > > value
> > > 
> > >
> > > in the web.xml
> > >
> > > and String param = servletContext.getInitParameter("param");
> > >
> > > in the JSP.
> > >
> > > - Original Message -
> > > From: "Duncan" <[EMAIL PROTECTED]>
> > > To: "Tomcat User List" <[EMAIL PROTECTED]>
> > > Sent: Wednesday, December 03, 2003 5:08 PM
> > > Subject: Global Variables
> > >
> > > > Is there a way to set global variables in the web.xml which can be read
> > > > by any JSP page?
> > > >
> > > > Cheers,
> > > > -Duncan
>
> -
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]


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global variables from server.xml

[Donie Kelly]

Hi all
I want to set a variable in server.xml which can be read by all webapps. How
do I do this?
Donie


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[HOW TO] - GLOBAL VARIABLES - PLEASE HELP

[Donie Kelly]

Hi all
Sorry for shouting but I've no hair left so it's the only thing I can do :)

Please tell me if it's possible to define a variable in server.xml or
somewhere, which is available to all running webapps.
I've looked in loads of docs and searched the archive but to no avail.

Please please please

Donie




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Re: [HOW TO] - GLOBAL VARIABLES - PLEASE HELP

[Raj Saini]

Hi Donie,

You can define a variable in the global web.xml (in conf directory). 
This variable should be available to all your applications. This should 
come at the end of the $TOMCAT_HOME/conf/web.xml file.

Though I have not used and tested this (I use for a single application 
in application specific web.xml) I feel it should work.


some description
foo
bar
java.lang.String


Raj

Donie Kelly wrote:
> Hi all
> Sorry for shouting but I've no hair left so it's the only thing I can do :)
> 
> Please tell me if it's possible to define a variable in server.xml or
> somewhere, which is available to all running webapps.
> I've looked in loads of docs and searched the archive but to no avail.
> 
> Please please please
> 
> Donie
> 
> 
> 
> 
> --
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> 



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RE: [HOW TO] - GLOBAL VARIABLES - PLEASE HELP

[Mathew Pole]

Hi Donie,

The second half of this is you need to know how to access it:

try {
  Context initCtx = new InitialContext();
  String foo = (String)(context.lookup ("java:comp/env/foo"));
}
catch (NamingException exc) {
  // oops
}

Regards,
   Mathew

--
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Web Architect, Gerard Industries
email: [EMAIL PROTECTED]  
www: http://www.clipsal.com   &
http://www.custompress.com.au  
phone: 08 8269 0511 ext 313, fax: 08 8340 1212, mobile: 0403 164 617

> Hi Donie,
> 
> You can define a variable in the global web.xml (in conf directory). 
> This variable should be available to all your applications. 
> This should 
> come at the end of the $TOMCAT_HOME/conf/web.xml file.
> 
> Though I have not used and tested this (I use for a single 
> application 
> in application specific web.xml) I feel it should work.
> 
> 
> some description
> foo
> bar
> java.lang.String
> 
> 
> Raj

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global variables inside a Tomcat JSP-Servlet app.

[Ben Bookey]

Dear List,

I hope someone can give some hints to a none java/TC -specialist.

We have a jsp-servlet app, which has some important app variables inside
the web.xml. Because the validation for these parameters is quite complex
we have a single public class with public static setters and getters
available to the all servlets and jsp pages within the application.
We use a context listener to read the parameters, so we can initalise this
public object reading the web.xml

This works fine but  I was wondering if there is a better way of doing this
?  Would appreciate any
comment. We are using TC 4.0 and 5.0

regards,

Ben


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How to create global variables wich could be accessed by all jsp sites and servlet's?

[Sebastian Hagenbrock]

Hi,

I've found nothing about how to save Variables wich are stored globally in
reference to one context.

Normally I handle the variables in session objects for each user. But I've
some preferences wich should be read only once at the start of the tomcat
server and then always only read by the classes/jsp sites.

I need it, because the initialisation of these variables consumes much time,
and i have running it now for each new created session object. But it is
only needed once at the servers startup.

How to do that?

Thx

SH

PS: Sorry for my bad english.


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Re: How to create global variables wich could be accessed by alljsp sites and servlet's?

[Bo Xu]

> -Original Message-
> From: Sebastian Hagenbrock [mailto:[EMAIL PROTECTED]]
> Sent: 03 December 2001 14:36
> To: Tomcat Maillist
> Subject: How to create global variables wich could be accessed by all
> jsp sites and servlet's?
>
> Hi,
>
> I've found nothing about how to save Variables wich are stored globally in
> reference to one context.
>
> Normally I handle the variables in session objects for each user. But I've
> some preferences wich should be read only once at the start of the tomcat
> server and then always only read by the classes/jsp sites.
>
> I need it, because the initialisation of these variables consumes much
time,
> and i have running it now for each new created session object. But it is
> only needed once at the servers startup.
>
> How to do that?
>
> Thx
>
> SH
>[...]


there are already other ways in other repling-emails, the following is my
suggestions:

if you want to make your Variables visible inside-context,  I think you also
can
save them with:
 - javax.servlet.ServletContext.getAttribute/setAttribute
 - use a class which wrap your variables as a "data container",
   and put this class together with your Servlet class.

if you want to make your Variables visible cross-context,  I think you also
can
save them with:
 - use a class which wrap your variables as a "data container",
   and put this class in JAKARTA_HOME/common/classes or
  JAKARTA_HOME/shared/classes(JAKARTA_HOME/classes)


Bo
Dec.03, 2001



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RE: How to create global variables wich could be accessed by all jsp sites and servlet's?

[Ikke List]

You may want to use a properties file or much more 'mordern' nowadays,
create  XML file which hold the values.

The Properties class is easier to work with directly I think.

Wouter

-Original Message-
From: Sebastian Hagenbrock [mailto:[EMAIL PROTECTED]]
Sent: Monday, 03 December, 2001 15:36
To: Tomcat Maillist
Subject: How to create global variables wich could be accessed by all
jsp sites and servlet's?


Hi,

I've found nothing about how to save Variables wich are stored globally in
reference to one context.

Normally I handle the variables in session objects for each user. But I've
some preferences wich should be read only once at the start of the tomcat
server and then always only read by the classes/jsp sites.

I need it, because the initialisation of these variables consumes much time,
and i have running it now for each new created session object. But it is
only needed once at the servers startup.

How to do that?

Thx

SH

PS: Sorry for my bad english.


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RE: How to create global variables wich could be accessed by all jsp sites and servlet's?

[Donie Kelly]

Have a look at system.properties
eg:
// Set up new system propeties
sc = getServletContext();
RootPath = sc.getRealPath("/");

propFile = new FileInputStream(RootPath + "myapp.properties");

Properties p = new Properties(System.getProperties());
p.load(propFile);
System.setProperties(p);

Run this in some servlet init() method which "loads on startup" (see
web.xml)

A file like this will then be in your $TOMCAT/webapps/app directory
myapp.properties

# My variable
myvar=myvalue



You can access these variables with 

System.getProperty("myvar")

Hope this helps
Donie

-Original Message-
From: Sebastian Hagenbrock [mailto:[EMAIL PROTECTED]]
Sent: 03 December 2001 14:36
To: Tomcat Maillist
Subject: How to create global variables wich could be accessed by all
jsp sites and servlet's?


Hi,

I've found nothing about how to save Variables wich are stored globally in
reference to one context.

Normally I handle the variables in session objects for each user. But I've
some preferences wich should be read only once at the start of the tomcat
server and then always only read by the classes/jsp sites.

I need it, because the initialisation of these variables consumes much time,
and i have running it now for each new created session object. But it is
only needed once at the servers startup.

How to do that?

Thx

SH

PS: Sorry for my bad english.


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AW: How to create global variables wich could be accessed by all jsp sites and servlet's?

[Sebastian Hagenbrock]

That's it...

Thank you very much.

SH

-Ursprüngliche Nachricht-
Von: Donie Kelly [mailto:[EMAIL PROTECTED]]
Gesendet: Montag, 3. Dezember 2001 16:46
An: 'Tomcat Users List'
Betreff: RE: How to create global variables wich could be accessed by
all jsp sites and servlet's?


Have a look at system.properties
eg:
// Set up new system propeties
sc = getServletContext();
RootPath = sc.getRealPath("/");

propFile = new FileInputStream(RootPath + "myapp.properties");

Properties p = new Properties(System.getProperties());
p.load(propFile);
System.setProperties(p);

Run this in some servlet init() method which "loads on startup" (see
web.xml)

A file like this will then be in your $TOMCAT/webapps/app directory
myapp.properties

# My variable
myvar=myvalue



You can access these variables with

System.getProperty("myvar")

Hope this helps
Donie



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