Re: [Cppcms-users] per request data storage?

[陈抒 <csf...@gm...>]

Hi, Shiv,
  If Heiko uses in-memory database, that means he still enables session in
web server. The web server cannot be clustered unless Redis provides a way
to sync their data in different machines.

And my current project is using MongoDB, mongodb driver can be statically
linked in my app. So when deploying my app on product server, no mongodb
driver's dll or so file is required.

Hi, Heiko:
  If you have chosen a database already and don't want to change this,
could you find a way to link the database client lib into your app
statically?



Dean Chen
Best regards
http://blog.csdn.net/csfreebird


On Fri, Dec 6, 2013 at 1:39 PM, Shiv Shankar Dayal <
shi...@gm...> wrote:

> You can use something like Redis for this which is in-memory database.
>
>
> On Fri, Dec 6, 2013 at 11:02 AM, Heiko Irrgang <hi...@93...> wrote:
>
>> Hi,
>>
>> well, thats exactly the point, i am not storing the session in a
>> database and therefor i do not want to save things like user password in
>> the browser cookie.
>>
>> using a database for session storage would definately be an option, but
>> as far as i see, this involves dynamic linking, i do not want this, when
>> my project is near to finish, i will get a commercial license and link
>> everything into a single file, having some extra files in the filesystem
>> is not an option.
>>
>> any way to implement db session without dynamic linking?
>>
>> Kind regards,
>> Heiko
>>
>> On Fri, Dec 06, 2013 at 12:25:11PM +0800, 陈抒 wrote:
>> > 1. You can save a key-value data structure in singleton application
>> object,
>> > key will be user id, value can be any user-specific data.
>> > But if you do this, you actually implement your own version of user
>> > session. Why not use cppcms session?
>> >
>> > 2. If the web server has session, it's not stateless anymore. When
>> > clustering several web servers together to do load balance and to
>> prevent
>> > single point of failure, sync these session between these web servers
>> are
>> > important and hard job. So my way is to avoid use session, just use
>> > database cluster or cache server to hold session values.
>> >
>> >
>> > Dean Chen
>> > Best regards
>> > http://blog.csdn.net/csfreebird
>> >
>> >
>> > On Fri, Dec 6, 2013 at 2:38 AM, Heiko Irrgang <hi...@93...> wrote:
>> >
>> > > Hi,
>> > >
>> > > thanx, i thought about singleton, but wouldn't this be application
>> wide?
>> > > So if i store user information in a singleton, everyone would count as
>> > > that user?
>> > >
>> > > Kind regards,
>> > > Heiko
>> > >
>> > > On Fri, Dec 06, 2013 at 12:08:05AM +0800, 陈抒 wrote:
>> > > > Not sure the different locations mean what? Different web URLs?
>> > > > If you want to save something in web app, in my way, I usually
>> create a
>> > > > singleton object called my_app, you could use any singleton
>> technology to
>> > > > create it. And save the variables that you want to cache and share
>>  as
>> > > the
>> > > > my_app object's member variable.
>> > > > For multi-thread protection, use boost::mutex to protect them.
>> > > >
>> > > >
>> > > > Dean Chen
>> > > > Best regards
>> > > > http://blog.csdn.net/csfreebird
>> > > >
>> > > >
>> > > > On Thu, Dec 5, 2013 at 11:45 PM, Heiko Irrgang <hi...@93...> wrote:
>> > > >
>> > > > > Hi,
>> > > > >
>> > > > > hm.. maybe i'm missing something here... i do not want to store
>> full
>> > > > > user information in the session cookie, i just want to safe it
>> > > somewhere
>> > > > > for the current request, so i do not re-re-re-re-read it from the
>> > > > > database, just because i need it on 5 different locations.
>> > > > >
>> > > > > i already have a cookie session running, but it only holds the
>> user id
>> > > > > and a usertoken.
>> > > > >
>> > > > > What i would need is some storage, that is neither file/cookie
>> based
>> > > and
>> > > > > does not interfere with the session.
>> > > > >
>> > > > > Pretty much like some local variables in the actual application
>> > > instance,
>> > > > > but on a point where i do not have this application instance.
>> > > > >
>> > > > > Is something like this available, or do i have to give the
>> application
>> > > > > instance as parameters to every function that might need
>> information
>> > > > > limited to the current request?
>> > > > >
>> > > > > Maybe i'm just thinking too much php here ;)
>> > > > >
>> > > > > Thanx in advance,
>> > > > > Heiko
>> > >
>> > >
>> > >
>> ------------------------------------------------------------------------------
>> > > Sponsored by Intel(R) XDK
>> > > Develop, test and display web and hybrid apps with a single code base.
>> > > Download it for free now!
>> > >
>> > >
>> http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk
>> > > _______________________________________________
>> > > Cppcms-users mailing list
>> > > Cpp...@li...
>> > > https://lists.sourceforge.net/lists/listinfo/cppcms-users
>> > >
>>
>> >
>> ------------------------------------------------------------------------------
>> > Sponsored by Intel(R) XDK
>> > Develop, test and display web and hybrid apps with a single code base.
>> > Download it for free now!
>> >
>> http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk
>>
>> > _______________________________________________
>> > Cppcms-users mailing list
>> > Cpp...@li...
>> > https://lists.sourceforge.net/lists/listinfo/cppcms-users
>>
>>
>> --
>> Heiko Irrgang
>> 93-interactive
>> Hochfeldstr. 30
>> 82377 Penzberg
>> Germany
>>
>> Web....: http://93i.de
>> Email..: hi...@93...
>> Phone..: +49-160-7873168
>>
>>
>> ------------------------------------------------------------------------------
>> Sponsored by Intel(R) XDK
>> Develop, test and display web and hybrid apps with a single code base.
>> Download it for free now!
>>
>> http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk
>> _______________________________________________
>> Cppcms-users mailing list
>> Cpp...@li...
>> https://lists.sourceforge.net/lists/listinfo/cppcms-users
>>
>
>
>
> --
> Respect,
> Shiv Shankar Dayal
>
>
> ------------------------------------------------------------------------------
> Sponsored by Intel(R) XDK
> Develop, test and display web and hybrid apps with a single code base.
> Download it for free now!
>
> http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk
> _______________________________________________
> Cppcms-users mailing list
> Cpp...@li...
> https://lists.sourceforge.net/lists/listinfo/cppcms-users
>
>