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.NET Forum / .NET Framework / Remoting / May 2005remoting object access information from local xml file frequenctly
hi all i have a requirement.. 1. i have lot of BL objects hosted in IIS single call mode, 2. depends on the parameter given to the methods, or some time if there is no parameter also.. we will go and read an xml file which is present in RemotingServer directory (IIS dir) for some information let us say.. it is a connection string.. based on this connectionstring and parameters further dll calls will be made.. 3. sometimes SQL,Oracle, OLEDB, ODBC ..etc.. depends on the type we would instanciate particular DAL dll thru. activator.createinstance.. 4. Can i avoid reading xml file at the server.. and access from the another remoting object... (singleton)... 5. to be more specific.. i have BL CustomerBL.rem...with lot of methods.. Check(1) method... in check(1) if it is "1" create, instantiate .. that DLL1 if it is "2" create, instantitate that DLL2 6. I am maintaining this in XML file. 7. shall i call another GetConnBL.rem from CusotmerBL.rem to get the subsequent connection string..? instead doing an I/O operation READING AN XML FILE.. if you need more details please reply me regs sahridhayan You can definately use an object on your server to load the xml file settings into memory instead of accessing the file on disk everytime a setting is needed. If your publicly exposed objects are all single-call what I would do is create a class that loads the xml file settings into the server's memory (like a dictionary) and then create a shared (static) reference to it. If you create the reference in a static constructor of your remoted objects' base class then this would get created the first time the client requested *any* remote object. This design also takes care of re-creating the settings object when the lease expires or the server application is restarted and the object is garbage collected. Something like: Public MustInherit Class MyBusinessBase '-- Remoted single-call object Inherits MarshalByRefObject Private Shared m_settings As MyConfigSettings Protected ReadOnly Property Settings() As MyConfigSettings Get Return m_settings End Get End Property Shared Sub New() m_settings = New MyConfigSettings() End Sub . . . . '-- rest of class def End Class HTH, -Beth > hi all > [quoted text clipped - 32 lines] > regs > sahridhayan Thanks Beth.. It was very useful.. it is efficient in using memory .. One more approach i am thinking.. since all the calls in IIS (remoting object hosted ) why dont we use the "HttpContext.Current.Application["Schema Owner"]" (sample) to fetch the data.. will it hold data in IIS memory automatically after retreiving from the web.config...? may be after first call... for accesing this value what do you all think about this? Regs Sahridhayan > You can definately use an object on your server to load the xml file > settings into memory instead of accessing the file on disk everytime a [quoted text clipped - 67 lines] > > regs > > sahridhayan Interesting. I suppose that would work but the solution I gave you will work without IIS and the Settings object can be anything you want it to be so it seems more flexible in this case. I have to avoid using HttpContext in our products because the components can be deployed in a variety of physical configurations and can't rely being in IIS. -B > Thanks Beth.. It was very useful.. it is efficient in using memory .. > [quoted text clipped - 91 lines] >> > regs >> > sahridhayan It is not working i am able access HttpRunTime.... But accessing HttpContext.Current.Application["Schema Owner"] like this not giving any values....(null) some of my findings..(command window access i/p vs o/p ------------------------------------------------------------------------------------------ ?System.Web.HttpContext.Current.Application["Product DatabaseType"] function 'System.Web.HttpContext.Current.Application.get_Item' evaluated and returned nul ------------------------------------------------------------------------------------------ ?HttpContext.Current.GetConfig("Product DatabaseType") function 'HttpContext.Current.GetConfig' evaluated and returned nul ------------------------------------------------------------------------------------------ ?HttpContext.GetAppConfig("Product DatabaseType") function 'HttpContext.GetAppConfig' evaluated and returned null ------------------------------------------------------------------------------------------ ?HttpContext.Current.Application[0] {"Index was out of range. Must be non-negative and less than the size of the collection.\r\nParameter name: index" }.... any insight into thesee approach.. thanks sahridhayan > Interesting. I suppose that would work but the solution I gave you will work > without IIS and the Settings object can be anything you want it to be so it [quoted text clipped - 99 lines] > >> > regs > >> > sahridhayan Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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