delphi - Multiple Connections for a single user -



delphi - Multiple Connections for a single user -

i trying figure best / "correct" place set next logic in delphi datasnap server.

a user connects server, , using credentials provided validate them using centralized authorizationdatabase (oracle database). if are, in fact, valid user, want given them connection info resides based on authorization repository says (could host,database,username, password).

i have authorizationdatabase in own server class, server life cycle, since noone can in without beingness validated there. create problem concurrency? 10 users login validated @ same time, work ok?

i have base of operations server module, session level info modules derive from, has application connection. application connection parameters can alter based on user logging in.

the problem having set authorization / validation / new db parameter assignment process.

where kind of two-step database approach best fit? seems rather common, user verified in 1 place, info going accessing in another.

in reviewing examples, don't see obvious place go.

it not safe share 1 connection across multiple sessions, "read error" or other error when 2 sessions seek read database @ same time.

but can have centralized place login, create thread safe, do:

tmonitor.enter(logindm); seek valid := logindm.login(username, password); tmonitor.exit(logindm); end;

about user acessing data, each user have own session runs on thread, can create 1 connection per serverclass instance , define lifecicle "session", each new session spawn new servermethod's class instance , have own connection, way not need worry way write server methods, have own "exclusive" connection.

delphi datasnap

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