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Posted to user@struts.apache.org by yitzle <yi...@users.sourceforge.net> on 2007/05/29 18:25:35 UTC
[S2] Obtaining Session/Request Object
I want to store session information.
>From what I understand, the best way to do this is by accessing the
Session Object.
It appears I get the session by getting the Request Object
(HttpServletRequest or whatever) and calling its getSession().
Struts1 had execute() methods that took a Request as a parameter.
How do I get the Request in S2? What class can I implement that has an
execute() that gets a Request? Or is there a different way to do it?
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
Oh. OK. That makes sense...
They have some sample code here [1] that made it "click" for me.
Thanks!
[1] http://www.infoq.com/articles/converting-struts-2-part1
On 5/29/07, Dave Newton <ne...@yahoo.com> wrote:
> --- yitzle <yi...@users.sourceforge.net144> wrote:
> > SessionAware only provides a setSession() method. No
> > getSession(). Do I use setSession both to set and
> get
> > Session variables?
>
> No, you use the map provided to the setSession method.
>
> d.
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Re: [S2] Obtaining Session/Request Object
Posted by Dave Newton <ne...@yahoo.com>.
--- yitzle <yi...@users.sourceforge.net> wrote:
> SessionAware only provides a setSession() method. No
> getSession(). Do I use setSession both to set and
get
> Session variables?
No, you use the map provided to the setSession method.
d.
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
SessionAware only provides a setSession() method. No getSession().
Do I use setSession both to set and get Session variables?
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
The SessionAware documentation you linked me to earlier [1] states:
"This interface is only relevant if the Action is used in a servlet
environment."
So is SessionAware really ServletSessionAware and/or
ServletRequestAware the same as RequestAware?
(I'm not trying to equate two classes, but rather I'm trying to say
that either name would be correct.)
[1]http://struts.apache.org/2.x/struts2-core/apidocs/org/apache/struts2/interceptor/SessionAware.html
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RE: [OT] Re: [S2] Obtaining Session/Request Object
Posted by "Forsberg, Mike" <mi...@amd.com>.
First off, I think the notion of sighting wikipedia as the end all be
all of a definition is highly suspect. After all, anyone can change the
Wikipedia at any time. For instance
http://en.wikipedia.org/wiki/The_Colbert_Report#_note-34
"On January 29, 2007, Colbert cited the case where Microsoft was alleged
to have hired someone [52] to tamper with Wikipedia..."
I like all the responses that Google has for define:servlet. You may
want to quote one of them for your answer.
http://www.google.com/search?q=define:Servlet
This does sound a lot like a homework question or an interview question.
Hope I helped,
-----Original Message-----
From: anexpert@gmail.com [mailto:anexpert@gmail.com] On Behalf Of yitzle
Sent: Tuesday, May 29, 2007 4:29 PM
To: Struts Users Mailing List
Subject: Re: [OT] Re: [S2] Obtaining Session/Request Object
On 5/29/07, Dave Newton <ne...@yahoo.com> wrote:
> I'm starting to feel like we're doing your
> homework for you.
I'm sorry you feel that way.
If you prefer not to reply, its your prerogative.
I am just trying to understand the technology.
> A "Struts project" is not a servlet. A Struts project
> might *have* a servlet (and in S1 is pretty much
> guaranteed to have at least one), but in S2 they might
> be considered an anomaly.
"JSPs are compiled into Java Servlets by a JSP compiler. [1]"
The way I see it, so long as the result is a JSP page, the project
contains a servlet.
Granted, one can easily write the viewer component without JSP, but I
think its fair to guess that a large percentage of Struts projects
make use of JSP pages.
> A web application is any application that runs on the
> web, like a blog, or web email, or social site, or
> whatever.
A blog, web mail or social site that was written in Java and runs on
or inside a standard server such as Tomcat would be a servlet, though.
As far as I can tell, it meets all the requirements.
It sounds like, for any program (end point; excluding containers, such
as Tomcat, Struts, etc) accessed via a browser, if it is written in
Java, it is a servlet, otherwise its a web application.
How about a solid clear definition of a servlet?
[1] http://en.wikipedia.org/wiki/JavaServer_Pages
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Re: [OT] Re: [S2] Obtaining Session/Request Object
Posted by Dave Newton <ne...@yahoo.com>.
--- yitzle <yi...@users.sourceforge.net> wrote:
> "JSPs are compiled into Java Servlets by a JSP
> compiler. [1]" The way I see it, so long as the
> result is a JSP page, the project contains a
servlet.
Semantics.
The developer rarely, if ever, needs to care that a
JSP page is compiled into a servlet.
> A blog, web mail or social site that was written in
> Java and runs on or inside a standard server such as
> Tomcat would be a servlet, though.
You are incorrect. A blog, web mail, or social site
*may* contain *one or more* servlets. Or it may not.
As I said before.
> It sounds like, for any program (end point;
> excluding containers, such as Tomcat, Struts, etc)
Struts is not a container.
> if it is written in Java, it is a servlet, otherwise
> its a web application.
You are incorrect. A servlet may be a single component
of a web application. Web applications do not *need*
to use servlets. For example, Struts 2, a member of
the Struts family this mailing list serves, does not
use servlets. A Struts 2 web application *may* use a
servlet. As I also said before, this is relatively
unusual.
> How about a solid clear definition of a servlet?
Servlets are classes that implement the Servlet
interface.
http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/Servlet.html
*Please* do basic JEE environment research somewhere
more appropriate: there are a *ton* of resources
available on the web that explain this in great
detail.
If you have Struts-related questions this is a great
place to get them answered. Other forums are more
appropriate for asking general JEE questions.
d.
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Re: [OT] Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
On 5/29/07, Dave Newton <ne...@yahoo.com> wrote:
> I'm starting to feel like we're doing your
> homework for you.
I'm sorry you feel that way.
If you prefer not to reply, its your prerogative.
I am just trying to understand the technology.
> A "Struts project" is not a servlet. A Struts project
> might *have* a servlet (and in S1 is pretty much
> guaranteed to have at least one), but in S2 they might
> be considered an anomaly.
"JSPs are compiled into Java Servlets by a JSP compiler. [1]"
The way I see it, so long as the result is a JSP page, the project
contains a servlet.
Granted, one can easily write the viewer component without JSP, but I
think its fair to guess that a large percentage of Struts projects
make use of JSP pages.
> A web application is any application that runs on the
> web, like a blog, or web email, or social site, or
> whatever.
A blog, web mail or social site that was written in Java and runs on
or inside a standard server such as Tomcat would be a servlet, though.
As far as I can tell, it meets all the requirements.
It sounds like, for any program (end point; excluding containers, such
as Tomcat, Struts, etc) accessed via a browser, if it is written in
Java, it is a servlet, otherwise its a web application.
How about a solid clear definition of a servlet?
[1] http://en.wikipedia.org/wiki/JavaServer_Pages
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[OT] Re: [S2] Obtaining Session/Request Object
Posted by Dave Newton <ne...@yahoo.com>.
--- yitzle <yi...@users.sourceforge.net> wrote:
> So, it would seem a Strut project is a servlet. It
> runs inside the web container, receives an HTTP
> request, generates and sends an HTTP response. Meets
> all the criteria. Right? Now, how do you define a
web
> application?
You may wish to seek elsewhere for non-Struts related
questions. I'm starting to feel like we're doing your
homework for you.
A "Struts project" is not a servlet. A Struts project
might *have* a servlet (and in S1 is pretty much
guaranteed to have at least one), but in S2 they might
be considered an anomaly.
A web application is any application that runs on the
web, like a blog, or web email, or social site, or
whatever.
d.
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
Alright. Read that page. Wikipedia's definition needs updating.
What I understand from that is that a servlet is basically like a Java
CGI program that runs in the web server process. So, it would seem a
Strut project is a servlet. It runs inside the web container, receives
an HTTP request, generates and sends an HTTP response. Meets all the
criteria. Right?
Now, how do you define a web application?
On 5/29/07, Al Sutton <al...@al-and-andrea.org.uk> wrote:
> Maybe you should start with;
>
> http://java.sun.com/products/servlet/articles/tutorial/
>
> Instead of wikipedia or the struts documentation.
>
> When you've got a grasp of what servlets and webapps are, then it might be
> time to re-visit struts.
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RE: [S2] Obtaining Session/Request Object
Posted by Al Sutton <al...@al-and-andrea.org.uk>.
Maybe you should start with;
http://java.sun.com/products/servlet/articles/tutorial/
Instead of wikipedia or the struts documentation.
When you've got a grasp of what servlets and webapps are, then it might be
time to re-visit struts.
-----Original Message-----
From: anexpert@gmail.com [mailto:anexpert@gmail.com] On Behalf Of yitzle
Sent: 29 May 2007 18:57
To: Struts Users Mailing List
Subject: Re: [S2] Obtaining Session/Request Object
On 5/29/07, Dave Newton <ne...@yahoo.com> wrote:
> --- yitzle <yi...@users.sourceforge.net53> wrote:
> > Now I need to figure out what classifies a Servlet vs a Web
> > Application.
>
> Er...
>
> In case you're serious, a servlet is part of a web application.
>
> d.
Let me see if I get this...
According to Wikipedia: "A Servlet is an object that receives a request
(ServletRequest) and generates a response (ServletResponse) based on the
request. [1]"
Shouldn't that make a web server a servlet? Or must it be a Java Object?
Tomcat is a web application.
Struts2 is a framework. It basically provides a bunch of pre-built classes
and interfaces, and allows a MVC setup. The controller gets the request. The
model does some business logic and the viewer generates a response. The
viewer uses JSP, and JSPs are turned into servlets.
Is the model a web application? A web servlet? Or just a normal Java Object
(POJO?) that I need to make SessionAware?
[1] http://en.wikipedia.org/wiki/Servlet
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
On 5/29/07, Dave Newton <ne...@yahoo.com> wrote:
> --- yitzle <yi...@users.sourceforge.net53> wrote:
> > Now I need to figure out what classifies a Servlet
> > vs a Web Application.
>
> Er...
>
> In case you're serious, a servlet is part of a web
> application.
>
> d.
Let me see if I get this...
According to Wikipedia: "A Servlet is an object that receives a
request (ServletRequest) and generates a response (ServletResponse)
based on the request. [1]"
Shouldn't that make a web server a servlet? Or must it be a Java Object?
Tomcat is a web application.
Struts2 is a framework. It basically provides a bunch of pre-built
classes and interfaces, and allows a MVC setup. The controller gets
the request. The model does some business logic and the viewer
generates a response. The viewer uses JSP, and JSPs are turned into
servlets.
Is the model a web application? A web servlet? Or just a normal Java
Object (POJO?) that I need to make SessionAware?
[1] http://en.wikipedia.org/wiki/Servlet
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Re: [S2] Obtaining Session/Request Object
Posted by Dave Newton <ne...@yahoo.com>.
--- yitzle <yi...@users.sourceforge.net> wrote:
> Now I need to figure out what classifies a Servlet
> vs a Web Application.
Er...
In case you're serious, a servlet is part of a web
application.
d.
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
Now I need to figure out what classifies a Servlet vs a Web Application.
Wikipedia should be of use...
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Re: [S2] Obtaining Session/Request Object
Posted by Martin Gainty <mg...@hotmail.com>.
dave is right..
feel free to ask this on tomcat users group
users@tomcat.apache.org
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----- Original Message -----
From: "Dave Newton" <ne...@yahoo.com>
To: "Struts Users Mailing List" <us...@struts.apache.org>
Sent: Tuesday, May 29, 2007 1:03 PM
Subject: Re: [S2] Obtaining Session/Request Object
> --- yitzle <yi...@users.sourceforge.net> wrote:
>> ... unless I am writing a Servlet.
>
> In which case it isn't an S2 question at all and
> should be asked elsewhere, and the previous
> sub-optimal solution would also be incorrect.
>
> d.
>
>
>
>
> ____________________________________________________________________________________Yahoo!
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Re: [S2] Obtaining Session/Request Object
Posted by Dave Newton <ne...@yahoo.com>.
--- yitzle <yi...@users.sourceforge.net> wrote:
> ... unless I am writing a Servlet.
In which case it isn't an S2 question at all and
should be asked elsewhere, and the previous
sub-optimal solution would also be incorrect.
d.
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Re: [S2] Obtaining Session/Request Object
Posted by yitzle <yi...@users.sourceforge.net>.
> No, you should implement SessionAware
> http://struts.apache.org/2.x/struts2-core/apidocs/org/apache/struts2/interceptor/SessionAware.html55
> and avoid being tied to the Servlet spec.
... unless I am writing a Servlet.
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Re: [S2] Obtaining Session/Request Object
Posted by Dave Newton <ne...@yahoo.com>.
--- Yoni Amir <am...@gmail.com> wrote:
> Your action should implement the ServletRequestAware
> interface, then the Servlet Config Interceptor,
which
> is active by default, does the rest.
>
http://struts.apache.org/2.x/docs/servlet-config-interceptor.html
No, you should implement SessionAware
http://struts.apache.org/2.x/struts2-core/apidocs/org/apache/struts2/interceptor/SessionAware.html
and avoid being tied to the Servlet spec.
d.
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Re: [S2] Obtaining Session/Request Object
Posted by Yoni Amir <am...@gmail.com>.
Your action should implement the ServletRequestAware interface, then
the Servlet Config Interceptor, which is active by default, does the
rest.
http://struts.apache.org/2.x/docs/servlet-config-interceptor.html
Yoni
On 5/29/07, yitzle <yi...@users.sourceforge.net> wrote:
> I want to store session information.
> From what I understand, the best way to do this is by accessing the
> Session Object.
> It appears I get the session by getting the Request Object
> (HttpServletRequest or whatever) and calling its getSession().
> Struts1 had execute() methods that took a Request as a parameter.
> How do I get the Request in S2? What class can I implement that has an
> execute() that gets a Request? Or is there a different way to do it?
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
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