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Service Connection Point
Troels Ravn Software Developer
Navision Software a/sNovember 8 1999
Agenda•What are Service Connection Points?•Why are they used?•How do they work?•When can they be used?
•Example
•NOT a “physical” entity
A Service Connection Point is...•An object that resides in the Active Directory•An object that contains information about a service
A Service Connection Point is used by...
•A service, for publishing information about itself
•A client, for getting the information necessary to bind to the service
Using Service Connection Points provides...
•Location TransparencyClients need not know names or locations of existing services
•No stale binding
How it works (server side)
•Publish service connection point on first start-up
Store service connection point ID in registry
•Update service connection point on subsequent start-ups
How it works (client side)
•Asks Active Directory for a list of available services to choose from
Retrieve binding information for selected service
Store service connection point ID
•Use stored ID to reconnect to service on subsequent start-ups
Prerequisites
•Active Directory support on platformWindows 2000Windows NT4, 95, 98 with AD-upgrade http://www.microsoft.com/ntserver/nts/downloads/
other/ADSI25/default.asp
•Schema extension
Active Directory
ExampleCompany network
DC 1
DC 2 DC 3
Client
ExampleInstalling Financials Server
DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
Example DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
If this is the first NF Server 2.60 in the network, extend the schema
FinancialsSCP
definition
FinancialsSCP
definition
FinancialsSCP
definition
FinancialsSCP
definition
Example DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
Publish the service connection point Service
ConnectionPoint
ServiceConnection
Point
ServiceConnection
Point
ServiceConnection
Point
Example DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
ServiceConnection
Point
Get list of available services
Use the binding information in the service connection point to connect to the server
ExampleServer is relocated
DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
Example DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
Old ServiceConnection
Point
Find old connection point and check the information it contains
Example DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
UpdatedService
ConnectionPoint
UpdatedService
ConnectionPoint
UpdatedService
ConnectionPoint
UpdatedService
ConnectionPoint
The information in the service connection point is not valid, so update it
Example DC 1
DC 2 DC 3
Client Navision Financials Server 2.60
UpdatedService
ConnectionPoint
Find service connection point used in last session
Use the binding information in the service connection point to connect to the server
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