Server-Side Persistence & Embedded Database Engines
By Chris Newcombe, April 01, 2005
Chris shares the lessons he learned when building the Steam software delivery and content management system that's built on top of the Berkeley DB database engine.
April, 2005: Server-Side Persistence & Embedded Database Engines
Example 2: (a) Throwing an exception; (b) adding another interface to the wrapper.
(a)
CAccountRecord myAccountRecord(Db::Instance()->GetRecordBelongingToKey(myAccountKey ) );
(b)
// An empty record object. This is just an empty "shell"--it won't pass its
// own Validate() method so cannot be stored in the database, but it can be
// used to receive another Record via its SwapNoThrow() method.
CAccountRecord ReceiveRecord;
// If the key exists and if pReceiveRecord (2nd arg) is not 0 then the
// Record will be constructed and SwapNoThrow()'ed into the specified
// receiver and true returned. Any previous contents of the receiver are lost.
bool bSuccess = Db::Instance()->AttemptGetRecordBelongingToKey
(Key, & ReceiveRecord);
