Thoughts on Exception Design
Before getting into the details of exception design, consider a facet that the simple examples in this chapter cannot communicate. Your overall exception handling strategy should guide the design and handling of your exceptions at the lowest levels. At least a napkin sketch of your exception handling architecture goes a long way to save you pain in the future. The following are some questions to consider.
• Will you handle exceptions at the top-most boundary layers such as UI, API, and service interfaces (my recommendation) or at lower levels in a more ad hoc fashion?
• In languages like Java in which the distinction is relevant, should you implement exceptions as checked exceptions that are declared as part of the ...
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