Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section will
be reentered.
Has anyone a solution?
Greetings
Pat
9  3229 
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK******** ******@TK2MSFTN GP06.phx.gbl...
Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section will
be reentered.
Has anyone a solution?
HttpRuntime.Unl oadAppDomain() would do it.
Just to be sure the Database connections are unusual ones that can't benefit
from standard pooling techniques?
Are you sure you need such a drastic response?
--
Anthony Jones - MVP ASP/ASP.NET
What does
"establish some
database-connections"
mean?
Are you persisting them somewhere? If so, bad approach, esp in the asp.net
world.
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK******** ******@TK2MSFTN GP06.phx.gbl...
Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section will
be reentered.
Has anyone a solution?
Greetings
Pat
Anthony Jones schrieb:
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK******** ******@TK2MSFTN GP06.phx.gbl...
>Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section will
be reentered.
Has anyone a solution?
HttpRuntime.Unl oadAppDomain() would do it.
Just to be sure the Database connections are unusual ones that can't benefit
from standard pooling techniques?
Are you sure you need such a drastic response?
Thanx for the quick response!
There are also some objects, which must be initialized at startup. If
there occures an error, (which should normaly not happen), then other
objects could't initialized and the application will be crash.
Thanx a lot!
Greetings
pat
your init should not be in the application startup code
as it needs to be called at other times
move the init code into a method
that inits and then sets a flag
if flag is set it does not init
now you can reset at will
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:eN******** ******@TK2MSFTN GP06.phx.gbl...
Anthony Jones schrieb:
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK******** ******@TK2MSFTN GP06.phx.gbl...
Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section
will
be reentered.
Has anyone a solution?
HttpRuntime.Unl oadAppDomain() would do it.
Just to be sure the Database connections are unusual ones that can't
benefit
from standard pooling techniques?
Are you sure you need such a drastic response?
Thanx for the quick response!
There are also some objects, which must be initialized at startup. If
there occures an error, (which should normaly not happen), then other
objects could't initialized and the application will be crash.
As John says doing this in the App start is probably not a good idea.
Sounds like what you need is to encase the dependant objects needed into a
'lazy' singleton pattern.
All access to the containing object is via a Static property on the object
that will instance on demand.
See: http://www.yoda.arachsys.com/csharp/singleton.html
BTW, you're happy you've got thread-safety sorted?
--
Anthony Jones - MVP ASP/ASP.NET
Anthony Jones schrieb:
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:eN******** ******@TK2MSFTN GP06.phx.gbl...
>Anthony Jones schrieb:
>>"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK****** ********@TK2MSF TNGP06.phx.gbl. ..
Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section
will
>>>be reentered.
Has anyone a solution?
HttpRuntime.U nloadAppDomain( ) would do it.
Just to be sure the Database connections are unusual ones that can't
benefit
>>from standard pooling techniques?
Are you sure you need such a drastic response?
Thanx for the quick response!
There are also some objects, which must be initialized at startup. If
there occures an error, (which should normaly not happen), then other
objects could't initialized and the application will be crash.
As John says doing this in the App start is probably not a good idea.
Sounds like what you need is to encase the dependant objects needed into a
'lazy' singleton pattern.
All access to the containing object is via a Static property on the object
that will instance on demand.
See: http://www.yoda.arachsys.com/csharp/singleton.html
BTW, you're happy you've got thread-safety sorted?
Thanx John and Anthony!
In normal case a singelton would be the best solution. But the objects
must be accessable from all sessions and should only be initialized at
one time. So if I realize it with the singelton-pattern, the problem is,
that each session creates its own instance. Or is that a wrong oppinion?
So my idea was, that all objects which must be have an
application-global scope are initialized at the beginning and stored in
the applicationstor e.
Have you a better solution?
Greetings
Pat
sloan schrieb:
What does
"establish some
database-connections"
mean?
Are you persisting them somewhere? If so, bad approach, esp in the asp.net
world.
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK******** ******@TK2MSFTN GP06.phx.gbl...
>Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section will
be reentered.
Has anyone a solution?
Greetings
Pat
It means a connection to an ActiveDirectory and establish a cache for
frequently accessed objects of this AD.
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:eV******** ******@TK2MSFTN GP05.phx.gbl...
Anthony Jones schrieb:
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:eN******** ******@TK2MSFTN GP06.phx.gbl...
Anthony Jones schrieb:
"Patrick Sona" <so**@Flexsecur e.dewrote in message
news:OK******* *******@TK2MSFT NGP06.phx.gbl.. .
Hi all,
Is it possible to force an ASP.NET web-application to exit?
At application-startup I have to check and establish some
database-connections. If there an error occours, the application must
shutdown, so that at the next request the application_sta rt section
will
>>be reentered.
Has anyone a solution?
HttpRuntime.Un loadAppDomain() would do it.
Just to be sure the Database connections are unusual ones that can't
benefit
>from standard pooling techniques?
Are you sure you need such a drastic response?
Thanx for the quick response!
There are also some objects, which must be initialized at startup. If
there occures an error, (which should normaly not happen), then other
objects could't initialized and the application will be crash.
As John says doing this in the App start is probably not a good idea.
Sounds like what you need is to encase the dependant objects needed into
a
'lazy' singleton pattern.
All access to the containing object is via a Static property on the
object
that will instance on demand.
See: http://www.yoda.arachsys.com/csharp/singleton.html
BTW, you're happy you've got thread-safety sorted?
Thanx John and Anthony!
In normal case a singelton would be the best solution. But the objects
must be accessable from all sessions and should only be initialized at
one time. So if I realize it with the singelton-pattern, the problem is,
that each session creates its own instance. Or is that a wrong oppinion?
Yes its wrong. The singleton pattern will create only one object across the
whole application (the AppDomain). That why I asked you about thread
safety, its actually tricky stuff that comes as a bit of a surprise,
especially to former ASPers making the transition to ASP.NET.
--
Anthony Jones - MVP ASP/ASP.NET
Having only one instance will cause locking bottlenecks
Having one instance per session will likely cause excess resource
usage
I would consider using a small pool of connections
the application level lock only needs to last long enough to decide
which connection to use for the current thread
you can make it self tuning - if all connections are in use increase
the pool size
the pool which automatically reach the ideal size for performance
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