Execute Program
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Execute Program
The Validate method looks over all the data and makes sure that it makes sense. It checks it for syntactic and semantic correctness. It may even check to ensure that the data in the transaction is consistent with the existing state of the database. For example, it might ensure that no such employee already exists. The Execute method uses the valida
... See moreThe idea is very simple. Consider Listings 21-2 and 21-3. An ActiveObjectEngine object maintains a linked list of Command objects. Users can add new commands to the engine, or they can call Run(). The Run() function simply goes through the linked list, executing and removing each command.