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NX: contractor - DuplicateKeyException

 
Mike Southgate
Ranch Hand
Posts: 183
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My assignment specifies that the createRecord method throws a DuplicateKeyException but doesn't say how it's generated. I can think of 2 scenarios:
1) the contractor name and location fields together form a primary key for the file, and you're trying to add a duplicate primary key, or
2) you go to create the record but just before you do, some other thread creates a record in the spot you were going to use.
Does anyone else see this differently, and how did you deal with #2 above?
ms
 
Gareth Knowles
Greenhorn
Posts: 24
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Hi Mike
In my assignment (URLyBird 1.1.3) I can't see how it will ever be thrown. I increment the record numbers on creation (or re-use a deleted one) and don't have anything in the spec to suggest a primary key. I could make up a primary key but don't know if I would be penalised for this, so I just intend to document that it will never be thrown.
Cheers
Gareth.
 
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