Singletons in asp

[PokerMan]

Hey guys

Just a quick question. If i had a static var, then all users coming onto my
site will be sharing the same var. So if i have a class that is a singleton
would the same happen there?

Basically i have a class that will only ever have one instance so, singleton
makes sense. But due to asp and lots of connecting users it had me wondering
if the singleton would work as one isntance per user or one instance for all
users (not what i want)

Thanks

 

[sloan]

First, I'll assume you're speaking of asp.net and not just asp.

They are different things.

Here is an example of a asp.net singleton:

10/24/2005
Web Session Wrapper for storing and retrieving objects
http://sholliday.spaces.live.com/blog/


PS
You should mark
public class WebSessionDataStore

as [Serializable]

and make any objects you put in there serializable if you go to sql server
session state management.

 

[PokerMan]

yes .net sorry.

I am more wanting to know how it will handle a singleton implementation not
how to implement one, tho i cant see an singleton implementation on that
blog? Is it very different to a standard one on .net?

First, I'll assume you're speaking of asp.net and not just asp.

They are different things.

Here is an example of a asp.net singleton:

10/24/2005
Web Session Wrapper for storing and retrieving objects
http://sholliday.spaces.live.com/blog/


PS
You should mark
public class WebSessionDataStore

as [Serializable]

and make any objects you put in there serializable if you go to sql server
session state management.

Hey guys

Just a quick question. If i had a static var, then all users coming onto my
site will be sharing the same var. So if i have a class that is a singleton
would the same happen there?

Basically i have a class that will only ever have one instance so, singleton
makes sense. But due to asp and lots of connecting users it had me wondering
if the singleton would work as one isntance per user or one instance for all
users (not what i want)

Thanks

 

[PokerMan]

Ah found ur singletom implementation on the blog, my apologies. And its
similar to mine, not sure why you use a method and dont set the instance as
a property get{} but its the same in essence.

So in answer to my original question a singleton will work as i expect?
Single instance per user, not one instance effected by all users?

First, I'll assume you're speaking of asp.net and not just asp.

They are different things.

Here is an example of a asp.net singleton:

10/24/2005
Web Session Wrapper for storing and retrieving objects
http://sholliday.spaces.live.com/blog/


PS
You should mark
public class WebSessionDataStore

as [Serializable]

and make any objects you put in there serializable if you go to sql server
session state management.

Hey guys

Just a quick question. If i had a static var, then all users coming onto my
site will be sharing the same var. So if i have a class that is a singleton
would the same happen there?

Basically i have a class that will only ever have one instance so, singleton
makes sense. But due to asp and lots of connecting users it had me wondering
if the singleton would work as one isntance per user or one instance for all
users (not what i want)

Thanks

 

[Aidy]

If you have static values it is one instance for *all* users. If you want
one instance for *each* user then you could store your object in the
Session.

 

[sloan]

Did you look at entry at the correct date?

private WebSessionDataStore() //constructor
{
this.m_itemCollection = new HybridDictionary();
}
/// <summary>
/// Singleton representing WebSessionDataStore.
/// </summary>
/// <returns></returns>
public static WebSessionDataStore GetInstance()
{
//other stuff here
}


Singleton is a DESIGN PATTERN, not "just an asp.net thing".

http://www.dofactory.com/Patterns/PatternSingleton.aspx


static/shared variables are another thing.


Based on your description of what you want
if the singleton would work as one isntance per user or one instance for

I've shown you how to create a true SINGLETON for the web environment.

You can find more by googling also:
http://www.google.com/search?hl=en&q=singleton+"asp.net"

yes .net sorry.

I am more wanting to know how it will handle a singleton implementation not
how to implement one, tho i cant see an singleton implementation on that
blog? Is it very different to a standard one on .net?

First, I'll assume you're speaking of asp.net and not just asp.

They are different things.

Here is an example of a asp.net singleton:

10/24/2005
Web Session Wrapper for storing and retrieving objects
http://sholliday.spaces.live.com/blog/


PS
You should mark
public class WebSessionDataStore

as [Serializable]

and make any objects you put in there serializable if you go to sql server
session state management.

Hey guys

Just a quick question. If i had a static var, then all users coming

onto
my

site will be sharing the same var. So if i have a class that is a singleton
would the same happen there?

Basically i have a class that will only ever have one instance so, singleton
makes sense. But due to asp and lots of connecting users it had me wondering
if the singleton would work as one isntance per user or one instance

for
all

users (not what i want)

Thanks

 

[sloan]

My singleton example piggybacks off of SESSION, therefore you will get "one
per user".

I use a method ... because I think thats what GOF (gang of four) does.

http://www.dofactory.com/Patterns/PatternSingleton.aspx
uses a method also.

.....

Again, because I piggy back off of Session, its "one per user".

If I were to piggyback off of Application (object, instead of Session)
(which I actually do in another scenario)....
it would be "all users".

Ah found ur singletom implementation on the blog, my apologies. And its
similar to mine, not sure why you use a method and dont set the instance as
a property get{} but its the same in essence.

So in answer to my original question a singleton will work as i expect?
Single instance per user, not one instance effected by all users?

First, I'll assume you're speaking of asp.net and not just asp.

They are different things.

Here is an example of a asp.net singleton:

10/24/2005
Web Session Wrapper for storing and retrieving objects
http://sholliday.spaces.live.com/blog/


PS
You should mark
public class WebSessionDataStore

as [Serializable]

and make any objects you put in there serializable if you go to sql server
session state management.

Hey guys

Just a quick question. If i had a static var, then all users coming

onto
my

site will be sharing the same var. So if i have a class that is a singleton
would the same happen there?

Basically i have a class that will only ever have one instance so, singleton
makes sense. But due to asp and lots of connecting users it had me wondering
if the singleton would work as one isntance per user or one instance

for
all

users (not what i want)

Thanks

 

[bruce barker]

it can be coded either way, depends on how you code it.

-- bruce (sqlwork.com)

Ah found ur singletom implementation on the blog, my apologies. And its
similar to mine, not sure why you use a method and dont set the instance as
a property get{} but its the same in essence.

So in answer to my original question a singleton will work as i expect?
Single instance per user, not one instance effected by all users?

First, I'll assume you're speaking of asp.net and not just asp.

They are different things.

Here is an example of a asp.net singleton:

10/24/2005
Web Session Wrapper for storing and retrieving objects
http://sholliday.spaces.live.com/blog/


PS
You should mark
public class WebSessionDataStore

as [Serializable]

and make any objects you put in there serializable if you go to sql server
session state management.

Hey guys

Just a quick question. If i had a static var, then all users coming onto my
site will be sharing the same var. So if i have a class that is a singleton
would the same happen there?

Basically i have a class that will only ever have one instance so, singleton
makes sense. But due to asp and lots of connecting users it had me wondering
if the singleton would work as one isntance per user or one instance for all
users (not what i want)

Thanks