Re: Initialise application once
On 12/21/2014 9:14 AM, Fabio Ricci wrote:
Yes that made it
THANK YOU very much!!!
Grazie mille!
Cheers
Fabio
Am 21.12.14 um 14:10 schrieb Alessandro Manzoni:
Il 21.12.2014 13.38, Fabio Ricci ha scritto:
Dear community
I developed a tomcat JSP servlet which - say - instantiates a class,
work with that class and gives some output back to the calling user
in the browser.
My point is instantiating the class ***once*** for every requests
coming after this instantiation. The reason is: the class loads
several components into memory and I would like not to do this at
every call of this JSP servlet but just once.
Where shell I put the initializing code for the heavy components?
Is this possible?
Thank you very much in advance!
Fabio
Try putting an attribute inside the servlet contex in a lazy way,
that will be in the scope of the whole application inside the same
VM.E.g.:
Object grosso = getServletContext().getAttribute(GROSSO);
if (grosso == null) {
grosso = new Grosso();
getServletContext().setAttribute(GROSSO, grosso);
}
If you want to limit the scope to a single session, put the same as a
session attribute.
You could also use a singleton that initializes itself in the same way.
Either way, the object and initialization should be thread safe.
Happy Holidays!
-Terence Bandoian
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Initialise application once
Dear community I developed a tomcat JSP servlet which - say - instantiates a class, work with that class and gives some output back to the calling user in the browser. My point is instantiating the class ***once*** for every requests coming after this instantiation. The reason is: the class loads several components into memory and I would like not to do this at every call of this JSP servlet but just once. Where shell I put the initializing code for the heavy components? Is this possible? Thank you very much in advance! Fabio signature.asc Description: OpenPGP digital signature
Re: Initialise application once
Il 21.12.2014 13.38, Fabio Ricci ha scritto:
Dear community
I developed a tomcat JSP servlet which - say - instantiates a class,
work with that class and gives some output back to the calling user in
the browser.
My point is instantiating the class ***once*** for every requests
coming after this instantiation. The reason is: the class loads
several components into memory and I would like not to do this at
every call of this JSP servlet but just once.
Where shell I put the initializing code for the heavy components? Is
this possible?
Thank you very much in advance!
Fabio
Try putting an attribute inside the servlet contex in a lazy way, that
will be in the scope of the whole application inside the same VM.E.g.:
Object grosso = getServletContext().getAttribute(GROSSO);
if (grosso == null) {
grosso = new Grosso();
getServletContext().setAttribute(GROSSO, grosso);
}
If you want to limit the scope to a single session, put the same as a
session attribute.
Re: Initialise application once
servlet context is exactly what u need.
*Thanks and Regards,*
Muralidhar Yaragalla.
*http://yaragalla.blogspot.in/ http://yaragalla.blogspot.in/*
On Sun, Dec 21, 2014 at 6:40 PM, Alessandro Manzoni
manzoni.alessand...@gmail.com wrote:
Il 21.12.2014 13.38, Fabio Ricci ha scritto:
Dear community
I developed a tomcat JSP servlet which - say - instantiates a class, work
with that class and gives some output back to the calling user in the
browser.
My point is instantiating the class ***once*** for every requests coming
after this instantiation. The reason is: the class loads several components
into memory and I would like not to do this at every call of this JSP
servlet but just once.
Where shell I put the initializing code for the heavy components? Is
this possible?
Thank you very much in advance!
Fabio
Try putting an attribute inside the servlet contex in a lazy way, that
will be in the scope of the whole application inside the same VM.E.g.:
Object grosso = getServletContext().getAttribute(GROSSO);
if (grosso == null) {
grosso = new Grosso();
getServletContext().setAttribute(GROSSO, grosso);
}
If you want to limit the scope to a single session, put the same as a
session attribute.
Re: Initialise application once
Yes that made it
THANK YOU very much!!!
Grazie mille!
Cheers
Fabio
Am 21.12.14 um 14:10 schrieb Alessandro Manzoni:
Il 21.12.2014 13.38, Fabio Ricci ha scritto:
Dear community
I developed a tomcat JSP servlet which - say - instantiates a class,
work with that class and gives some output back to the calling user
in the browser.
My point is instantiating the class ***once*** for every requests
coming after this instantiation. The reason is: the class loads
several components into memory and I would like not to do this at
every call of this JSP servlet but just once.
Where shell I put the initializing code for the heavy components?
Is this possible?
Thank you very much in advance!
Fabio
Try putting an attribute inside the servlet contex in a lazy way, that
will be in the scope of the whole application inside the same VM.E.g.:
Object grosso = getServletContext().getAttribute(GROSSO);
if (grosso == null) {
grosso = new Grosso();
getServletContext().setAttribute(GROSSO, grosso);
}
If you want to limit the scope to a single session, put the same as a
session attribute.
--
Kind regards / Meilleures salutations / Freundliche Grüsse
/Fabio Ricci/
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