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ASP.NET Session "Persistence Manager"
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Murray View Drop Down
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Posts: 4 		Post Options Post Options   Quote Murray Quote  Post ReplyReply Direct Link To This Post Topic: ASP.NET Session "Persistence Manager"
    Posted: 18-Aug-2010 at 9:46pm
 In an ASP.NET app, what is the difference between

'from global.asx
Session("PersistenceManager") = New PersistenceManager(True)
 
and
 
Dim pm As PersistenceManager = PersistenceManager.DefaultManager
 
Does 'DefaultManager' reference the session instance?
 
Murray 
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davidklitzke View Drop Down
IdeaBlade
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Joined: 14-Jun-2007
Posts: 715 		Post Options Post Options   Quote davidklitzke Quote  Post ReplyReply Direct Link To This Post Posted: 19-Aug-2010 at 10:59am
From Reference Help:
 
The PersistenceManager constructor example you show uses this signature:

Visual Basic (Declaration)  
Public Function New( _
   ByVal pShouldConnect As Boolean _
)

This constructor will create a new PersistenceManager and optionally connect to the server if pShouldConnect is true.
 
DefaultManager provides an easy way of referencing your "default" PersistenceManager. If you have not explicitly constructed a PersistenceManager DefaultManager will implicitly call the default constructor upon first use. If you have constructed a PersistenceManager DefaultManager will return your first constructed instance.
You can also set the PersistenceManager to be referenced as your DefaultManager. Once set, the PersistenceManager you've indicated will be returned as the "default".

When using DefaultManager without having first constructed an instance with the connection and data source extension of your choice, you lose the ability to catch and diagnose any connection problems to your PersistenceServer, since Connect is called implicitly
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kimj View Drop Down
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Posts: 1391 		Post Options Post Options   Quote kimj Quote  Post ReplyReply Direct Link To This Post Posted: 23-Aug-2010 at 11:54am
In ASP.NET, PersistenceManager.DefaultManager is actually scoped to the application and should therefore not be used.
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