Singletons in asp

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)

ThanksFirst, 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" <nospam@.pokercat.co.ukwrote in message
news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

Hey guys
>
Just a quick question. If i had a static var, then all users coming onto

my

Quote:

Originally Posted by

site will be sharing the same var. So if i have a class that is a

singleton

Quote:

Originally Posted by

would the same happen there?
>
Basically i have a class that will only ever have one instance so,

singleton

Quote:

Originally Posted by

makes sense. But due to asp and lots of connecting users it had me

wondering

Quote:

Originally Posted by

if the singleton would work as one isntance per user or one instance for

all

Quote:

Originally Posted by

users (not what i want)
>
Thanks
>
>

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?

"sloan" <sloan@.ipass.netwrote in message
news:%23GxTXJjaHHA.1216@.TK2MSFTNGP03.phx.gbl...

Quote:

Originally Posted by

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" <nospam@.pokercat.co.ukwrote in message
news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

>Hey guys
>>
>Just a quick question. If i had a static var, then all users coming onto

my

Quote:

Originally Posted by

>site will be sharing the same var. So if i have a class that is a

singleton

Quote:

Originally Posted by

>would the same happen there?
>>
>Basically i have a class that will only ever have one instance so,

singleton

Quote:

Originally Posted by

>makes sense. But due to asp and lots of connecting users it had me

wondering

Quote:

Originally Posted by

>if the singleton would work as one isntance per user or one instance for

all

Quote:

Originally Posted by

>users (not what i want)
>>
>Thanks
>>
>>

>
>

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.

"PokerMan" <nospam@.pokercat.co.ukwrote in message
news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

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
>

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?

"sloan" <sloan@.ipass.netwrote in message
news:%23GxTXJjaHHA.1216@.TK2MSFTNGP03.phx.gbl...

Quote:

Originally Posted by

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" <nospam@.pokercat.co.ukwrote in message
news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

>Hey guys
>>
>Just a quick question. If i had a static var, then all users coming onto

my

Quote:

Originally Posted by

>site will be sharing the same var. So if i have a class that is a

singleton

Quote:

Originally Posted by

>would the same happen there?
>>
>Basically i have a class that will only ever have one instance so,

singleton

Quote:

Originally Posted by

>makes sense. But due to asp and lots of connecting users it had me

wondering

Quote:

Originally Posted by

>if the singleton would work as one isntance per user or one instance for

all

Quote:

Originally Posted by

>users (not what i want)
>>
>Thanks
>>
>>

>
>

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

Quote:

Originally Posted by

Quote:

Originally Posted by

allusers (not what i want)

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&...n+%22asp.net%22
"PokerMan" <nospam@.pokercat.co.ukwrote in message
news:e23xaSjaHHA.4716@.TK2MSFTNGP02.phx.gbl...

Quote:

Originally Posted by

yes .net sorry.
>
I am more wanting to know how it will handle a singleton implementation

not

Quote:

Originally Posted by

how to implement one, tho i cant see an singleton implementation on that
blog? Is it very different to a standard one on .net?
>
>
>
"sloan" <sloan@.ipass.netwrote in message
news:%23GxTXJjaHHA.1216@.TK2MSFTNGP03.phx.gbl...

Quote:

Originally Posted by

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

Quote:

Originally Posted by

Quote:

Originally Posted by

session state management.

"PokerMan" <nospam@.pokercat.co.ukwrote in message
news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

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

onto

Quote:

Originally Posted by

Quote:

Originally Posted by

my

Quote:

Originally Posted by

site will be sharing the same var. So if i have a class that is a

singleton

Quote:

Originally Posted by

would the same happen there?
>
Basically i have a class that will only ever have one instance so,

singleton

Quote:

Originally Posted by

makes sense. But due to asp and lots of connecting users it had me

wondering

Quote:

Originally Posted by

if the singleton would work as one isntance per user or one instance

for

Quote:

Originally Posted by

Quote:

Originally Posted by

all

Quote:

Originally Posted by

users (not what i want)
>
Thanks
>
>

>
>

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".

"PokerMan" <nospam@.pokercat.co.ukwrote in message
news:eSVmAZjaHHA.2172@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

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

Quote:

Originally Posted by

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?
>
>
>
"sloan" <sloan@.ipass.netwrote in message
news:%23GxTXJjaHHA.1216@.TK2MSFTNGP03.phx.gbl...

Quote:

Originally Posted by

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

Quote:

Originally Posted by

Quote:

Originally Posted by

session state management.

"PokerMan" <nospam@.pokercat.co.ukwrote in message
news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

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

onto

Quote:

Originally Posted by

Quote:

Originally Posted by

my

Quote:

Originally Posted by

site will be sharing the same var. So if i have a class that is a

singleton

Quote:

Originally Posted by

would the same happen there?
>
Basically i have a class that will only ever have one instance so,

singleton

Quote:

Originally Posted by

makes sense. But due to asp and lots of connecting users it had me

wondering

Quote:

Originally Posted by

if the singleton would work as one isntance per user or one instance

for

Quote:

Originally Posted by

Quote:

Originally Posted by

all

Quote:

Originally Posted by

users (not what i want)
>
Thanks
>
>

>
>

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

-- bruce (sqlwork.com)

PokerMan wrote:

Quote:

Originally Posted by

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?
>
>
>
"sloan" <sloan@.ipass.netwrote in message
news:%23GxTXJjaHHA.1216@.TK2MSFTNGP03.phx.gbl...

Quote:

Originally Posted by

>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" <nospam@.pokercat.co.ukwrote in message
>news:ukskBEjaHHA.4788@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

>>Hey guys
>>>
>>Just a quick question. If i had a static var, then all users coming onto

>my

Quote:

Originally Posted by

>>site will be sharing the same var. So if i have a class that is a

>singleton

Quote:

Originally Posted by

>>would the same happen there?
>>>
>>Basically i have a class that will only ever have one instance so,

>singleton

Quote:

Originally Posted by

>>makes sense. But due to asp and lots of connecting users it had me

>wondering

Quote:

Originally Posted by

>>if the singleton would work as one isntance per user or one instance for

>all

Quote:

Originally Posted by

>>users (not what i want)
>>>
>>Thanks
>>>
>>>

>>

>
>