fix: Update exception handler to use fully qualified class name for A…#239
fix: Update exception handler to use fully qualified class name for A…#239polyglot-k merged 1 commit intoprodfrom
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Summary of Changes
Hello @polyglot-k, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request enhances the robustness of the application's exception handling by clarifying the specific AuthenticationException type being caught in the GlobalExceptionHandler. By employing a fully qualified class name, the change prevents potential conflicts and ensures that the intended custom exception is consistently processed, leading to more predictable and reliable error management.
Highlights
- Exception Handling Clarity: The
GlobalExceptionHandlerhas been updated to explicitly use the fully qualified class name forlife.mosu.mosuserver.global.exception.AuthenticationExceptionin its@ExceptionHandlerannotation and method parameter. This change eliminates potential ambiguity if multipleAuthenticationExceptionclasses exist in the project's dependencies, ensuring the correct custom exception is always handled.
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Code Review
This pull request correctly resolves an ambiguity between two AuthenticationException types by using a fully qualified class name. My review focuses on improving the robustness and maintainability of the exception handling logic that is activated by this change. I've identified a critical bug that could cause a NullPointerException within the exception handler, and a high-priority issue regarding code duplication that also misses an opportunity for more specific error reporting. I recommend addressing these in a follow-up PR.
| @ExceptionHandler(life.mosu.mosuserver.global.exception.AuthenticationException.class) | ||
| public ResponseEntity<ErrorResponse> handleCustomAuthenticationException( | ||
| AuthenticationException ex) { | ||
| life.mosu.mosuserver.global.exception.AuthenticationException ex) { |
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This change correctly wires up the handler for your custom AuthenticationException. However, the handler itself has a critical issue that this change will now expose.
The call to notifyIfNeeded(ex) on line 88 can lead to a NullPointerException. Inside notifyIfNeeded (line 152), the code ex.getCause().toString() is executed without checking if ex.getCause() is null.
Your custom life.mosu.mosuserver.global.exception.AuthenticationException is instantiated without a cause, so ex.getCause() will be null for it. This will crash the exception handler, masking the original error.
This needs to be fixed urgently. The notifyIfNeeded method should be updated to handle null causes gracefully. For example:
// In notifyIfNeeded(Exception ex)
private void notifyIfNeeded(Exception ex) {
try {
String cause = ex.getCause() != null ? ex.getCause().toString() : "No cause available";
DiscordExceptionNotifyEventRequest request = DiscordExceptionNotifyEventRequest.of(
cause,
ex.getMessage()
);
notifier.send(request);
} catch (Exception notifyEx) {
log.error("[Discord Notify Error]", notifyEx);
}
}Since this fix is outside the changed lines, please address it in a follow-up PR, but it is critical.
| @ExceptionHandler(life.mosu.mosuserver.global.exception.AuthenticationException.class) | ||
| public ResponseEntity<ErrorResponse> handleCustomAuthenticationException( | ||
| AuthenticationException ex) { | ||
| life.mosu.mosuserver.global.exception.AuthenticationException ex) { |
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While this change is correct, the handler's implementation introduces two maintainability concerns:
- Code Duplication: The body of this handler is identical to
handleAuthenticationException(lines 73-83). This violates the DRY (Don't Repeat Yourself) principle and makes future changes error-prone. - Lack of Specificity: The handler doesn't use the
loginIdfield from the customAuthenticationException, missing an opportunity for more detailed error logging/notification.
I recommend refactoring to address both issues. You could extract the common response-building logic into a private helper method. This helper could then check the exception type to include specific details like loginId in notifications.
Addressing this would significantly improve the maintainability and observability of your exception handling. This can be done in a follow-up PR.
1 participant
This pull request makes a small but important change to exception handling in the
GlobalExceptionHandlerclass. The change clarifies whichAuthenticationExceptionis being handled by specifying its fully qualified class name, which helps prevent ambiguity if there are multipleAuthenticationExceptionclasses in the project or dependencies.@ExceptionHandlerannotation and method parameter inGlobalExceptionHandlerto use the fully qualifiedlife.mosu.mosuserver.global.exception.AuthenticationExceptionclass, ensuring the correct exception type is caught and handled.