DomainErrors

DomainErrors refers to a conceptual category of errors that arise within a specific problem domain or application. Unlike general programming errors like syntax errors or runtime exceptions, domain errors are tied to the rules, logic, and constraints of the business or application itself. For instance, in an e-commerce system, a domain error might occur if a user attempts to purchase more items than are available in stock, or if a discount code is applied that has already expired.

These errors are not necessarily bugs in the code's execution, but rather violations of expected business logic. They indicate that an operation could not be completed successfully because it contravened a rule or condition defined by the domain. Handling domain errors effectively is crucial for building robust applications that behave predictably and provide meaningful feedback to users.

When a domain error occurs, the system should ideally signal this to the user or another part of the application in a way that is understandable within the context of the problem. This might involve returning specific error codes, throwing custom exceptions, or displaying user-friendly messages. The distinction between domain errors and technical errors helps in debugging and maintaining software, as it allows developers to differentiate between problems in the program's implementation and issues with the underlying business rules. Proper identification and management of domain errors contribute to a higher quality user experience and more reliable software.