Here's the scenario:

A & B are remote objects hosted under IIS
Everytime A & B get invoked, they need to get some value/data from another object (call it C).

For example, C is an ConfigurationReader that will read an external config file, and put all the data inside a dictionary.

When any method of A or B get invoked, it needs to get specific value/data from C.


The problem is (please correct if I'm wrong):

I'm hosted these objects (A & B) under IIS, so I don't have any chance to do any initialization for C, since reading the external config file should be done ONLY ONCE.

This lead to the pattern that C should be a singleton object. So whenever it being called by A or B (via static method C.GetInstance()), it will always return the same instance of C that already been initialized once.


The question:

Is there anyway to realize this scenario?


Any advise or guidance will be greatly appreciated. Thanks.

Regards,

Lok

I've found this page to be most helpful http://www.yoda.arachsys.com/csharp/singleton.html

Thanks for the link.

Under ordinary scheme, hosting remote-object inside windows apps/windows service architecture, the singleton patterns are working perfectly.

The problem here, I'm hosting the remote-object inside IIS, so I don't have any control to manage how the apps will start-up, how the remote-object been initialized, etc.

Actually, I can put the initialization routine inside Global.asax.cs, but the one that I don't know, how to "connect" between my remote-object and all the instance that I already declare/initialize inside Global.asax.cs, since it's not an ASP.NET apps.

Anyway thanks for your help.

regards,

Lok

Already found the solution by using Global.asax, and initialize all the singleton object inside Application_Start :D

Topic closed.

If the initialization routine isn't very long just put the code inside singleton-object's constructor (and use that full lazy pattern). That way it is initialized the first time object is called and only once.

But glad that you got it working :)