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From: Martin Gainty <mgainty@hotmail.com>
To: Tomcat Users List <users@tomcat.apache.org>
Subject: RE: storing images
Date: Thu, 5 May 2011 22:05:20 -0400
Importance: Normal
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References: 
 <7B8C0B59-F57A-4778-9E7B-4B190A33A844@gmail.com><4DC33A39.40404@christopherschultz.net>,<2023570233-1304641148-cardhu_decombobulator_blackberry.rim.net-1665235932-@bda448.bisx.prod.on.blackberry><BLU142-W2201C39851F42EE17812F0AE830@phx.gbl>,<150880078-1304645563-cardhu_decombobulator_blackberry.rim.net-1251793382-@bda448.bisx.prod.on.blackberry>
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yes session variables would be specific to user's session
servlet-context and params are available to any requestor who accesses the =
servlet

Martin Gainty=20
______________________________________________=20
Jogi =E9s Bizalmass=E1gi kinyilatkoztat=E1s/Verzicht und Vertraulichkeitanm=
erkung/Note de d=E9ni et de confidentialit=E9
 Ez az
=FCzenet bizalmas.  Ha nem =F6n az akinek sz=E1nva volt=2C akkor k=E9rj=FCk=
=2C hogy
jelentse azt nek=FCnk vissza. Semmif=E9le tov=E1bb=EDt=E1sa vagy m=E1solat=
=E1nak
k=E9sz=EDt=E9se nem megengedett.  Ez az =FCzenet csak ismeret cser=E9t szol=
g=E1l =E9s
semmif=E9le jogi alkalmazhat=F3s=E1ga sincs.  Mivel az electronikus =FCzene=
tek
k=F6nnyen megv=E1ltoztathat=F3ak=2C ez=E9rt minket semmi felel=F6s=E9g nem =
terhelhet
ezen =FCzenet tartalma miatt.

Diese Nachricht ist vertraulich. Sollten Sie nicht der vorgesehene Empfaeng=
er sein=2C so bitten wir hoeflich um eine Mitteilung. Jede unbefugte Weiter=
leitung oder Fertigung einer Kopie ist unzulaessig. Diese Nachricht dient l=
ediglich dem Austausch von Informationen und entfaltet keine rechtliche Bin=
dungswirkung. Aufgrund der leichten Manipulierbarkeit von E-Mails koennen w=
ir keine Haftung fuer den Inhalt uebernehmen.
Ce message est confidentiel et peut =EAtre privil=E9gi=E9. Si vous n'=EAtes=
 pas le destinataire pr=E9vu=2C nous te demandons avec bont=E9 que pour sat=
isfaire informez l'exp=E9diteur. N'importe quelle diffusion non autoris=E9e=
 ou la copie de ceci est interdite. Ce message sert =E0 l'information seule=
ment et n'aura pas n'importe quel effet l=E9galement obligatoire. =C9tant d=
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=2C nous ne pouvons accepter aucune responsabilit=E9 pour le contenu fourni=
.


> Subject: Re: storing images
> To: users@tomcat.apache.org
> From: alzrck@gmail.com
> Date: Fri=2C 6 May 2011 01:32:40 +0000
>=20
> Yes for the ajax.
>=20
> If im getting it well=2C i have no need to tie the user with an image ins=
tance. image1 is the same for every users.
>=20
> Isnt servletcontext shared within the webapp? Meaning that every session =
access the same servletcontext?
>=20
> Regards
>=20
> Enviado desde blackberry
>=20
> -----Original Message-----
> From: Martin Gainty <mgainty@hotmail.com>
> Date: Thu=2C 5 May 2011 21:26:12=20
> To: Tomcat Users List<users@tomcat.apache.org>
> Reply-To: "Tomcat Users List" <users@tomcat.apache.org>
> Subject: RE: storing images
>=20
>=20
> achieved if you correspond the userid-imageid parameter with the acquired=
 image identifier e.g.
> ?code=3D1.1 puts user1 image 1 on servlet and returns <img src=3Dservlet?=
get=3D1.1>
>  ?code=3D1.2 puts user1 image 2 on servlet and returns <img src=3Dservlet=
?get=3D1.2>
>  ?code=3D2.1 puts user2 image 1 on servlet and returns <img src=3Dservlet=
?get=3D2.1>
>=20
> are you using XMLHTTPRequest for ajax ?
> Martin Gainty=20
> ______________________________________________=20
> Verzicht und Vertraulichkeitanmerkung/Note de d=E9ni et de confidentialit=
=E9
>  Diese Nachricht ist vertraulich. Sollten Sie nicht der vorgesehene Empfa=
enger sein=2C so bitten wir hoeflich um eine Mitteilung. Jede unbefugte Wei=
terleitung oder Fertigung einer Kopie ist unzulaessig. Diese Nachricht dien=
t lediglich dem Austausch von Informationen und entfaltet keine rechtliche =
Bindungswirkung. Aufgrund der leichten Manipulierbarkeit von E-Mails koenne=
n wir keine Haftung fuer den Inhalt uebernehmen.
> Ce message est confidentiel et peut =EAtre privil=E9gi=E9. Si vous n'=EAt=
es pas le destinataire pr=E9vu=2C nous te demandons avec bont=E9 que pour s=
atisfaire informez l'exp=E9diteur. N'importe quelle diffusion non autoris=
=E9e ou la copie de ceci est interdite. Ce message sert =E0 l'information s=
eulement et n'aura pas n'importe quel effet l=E9galement obligatoire. =C9ta=
nt donn=E9 que les email peuvent facilement =EAtre sujets =E0 la manipulati=
on=2C nous ne pouvons accepter aucune responsabilit=E9 pour le contenu four=
ni.
>=20
>=20
>=20
>=20
> > Subject: Re: storing images
> > To: users@tomcat.apache.org
> > From: alzrck@gmail.com
> > Date: Fri=2C 6 May 2011 00:19:06 +0000
> >=20
> > What i did (im testing and profiling it) is.
> >=20
> > As the images are around 10/12 and each image has around 30 to 35k.
> >=20
> > Im storing the images as servletcontext attribute.
> >=20
> > So calling to the servlet with ?code=3D1 builds and stores image1 on se=
rvlet context. And returns html with=20
> <img src=3Dservlet?get=3D1>
> >=20
> > So ajax sends that to the jsp that calls servlet?get and that returns t=
he image.
> >=20
> > It's working now=2C what im profiling is to verify no matter how many u=
sers are requesting images=2C image1 is the same for every user and if one =
user builds up the image again=2C all others gets the new one.
> >=20
> > As those images are stored on servletcontext=2C all are shared among th=
e webapp so images are not duplicated or triplicated or n-cated.
> >=20
> > I dont know if it's a good solution=2C but up to know it's working and =
really fast.
> >=20
> >=20
> > Regards
> >=20
> >=20
> > Enviado desde blackberry
> >=20
> > -----Original Message-----
> > From: Christopher Schultz <chris@christopherschultz.net>
> > Date: Thu=2C 05 May 2011 20:00:57=20
> > To: Tomcat Users List<users@tomcat.apache.org>
> > Reply-To: "Tomcat Users List" <users@tomcat.apache.org>
> > Subject: Re: storing images
> >=20
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >=20
> > Alexis=2C
> >=20
> > On 5/5/2011 2:19 PM=2C alexis wrote:
> > > I have a servlet that basically does
> > >=20
> > > . creates an image
> > > . store the image on disk
> > > . returns an html <img> tag pointing to the stored image.
> > >=20
> > > there's no way to return binary content (the image) from the servlet =
to the ajax script.
> >=20
> > What about JSON? Not that I think it's a terribly good idea=2C but it's
> > just a thought.
> >=20
> > Another thought is possibly using a database=2C relational or otherwise=
=2C
> > rather than the file system. Of course=2C you'd have to write your own
> > servlet to access the image from the database instead of the filesystem=
=2C
> > so I'm not sure it buys you much over the other solutions presented alr=
eady.
> >=20
> > - -chris
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.10 (MingW32)
> > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> >=20
> > iEYEARECAAYFAk3DOjkACgkQ9CaO5/Lv0PDzmgCeK2tN3eH+aVY6ElmFiKRe+cj7
> > WZcAn0Yj9qSklAynFdBeyRsL/wl0TpWD
> > =3D41U2
> > -----END PGP SIGNATURE-----
> >=20
> > ---------------------------------------------------------------------
> > To unsubscribe=2C e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands=2C e-mail: users-help@tomcat.apache.org
> >=20
>  		 	   		 =20
 		 	   		  =

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