Exception design. Sztuka projektowania wyjątków
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Szymon Szymański: Każdy o nich słyszał, ale niekoniecznie stosował, a co dopiero widział dobrze zakodzone – co może być trudnego w pisaniu wyjątków? Samo pisanie może i nie jest trudne, ale zaprojektowanie ich w taki sposób, aby przynosiły wartość projektowi, to już ciężka sztuka – szczególnie w PHP. Na tej prezentacji dowiesz się, dlaczego ludzie nie pogłębiają wiedzy na temat wyjątków oraz jak można identyfikować miejsca, w których wyjątek jest potrzebny, a w których niekoniecznie. No i oczywiście poznasz KILKA PROSTYCH TRIKÓW na zwiększenie przydatności wyjątków.
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Exception design. Sztuka projektowania wyjątków
- 1. ExceptionDesign 1 ExceptionDesign EXCEPTION DESIGN THE ART OF MAKING DEBUGGING MORE ACCURATE
- 2. SZYMON ZBIGNIEW SZYMAŃSKI HEAD OF PHP AT THE SOFTWARE HOUSE
- 3. ExceptionDesign 3 WHY EXCEPTIONS? Wasn’t there anything better?
- 12. ExceptionDesign 12 Easy to start! Historical baggage " Outdated community habits#
- 16. ExceptionDesign 15 Not happy path$ Improve readability %
- 17. ExceptionDesign 17 Problem’s likelihood& Business or app severity '
- 20. ExceptionDesign 20 BREAKDOWN PROBLEM REASON No obvious reason why this happened NAME Really generic for a task specific piece of business logic NOT VERY HELPFUL The best thing we can do is just log the event and investigate later 20
- 23. ExceptionDesign 23 BREAKDOWN PROBLEM REASON No obvious reason why this happened NAME Really generic for a task specific piece of business logic NOT VERY HELPFUL The best thing we can do is just log the event and investigate later 23
- 26. ExceptionDesign 26 WAIT!Isn’t this tooooo verbose?
- 28. ExceptionDesign 28 CPS(R) CONTEXT Be aware of your programming context PROBLEM Notice the problem which you want to highlight SOLUTION (REASON) Present what needs to be fixed or pass something helpful for further debugging 28
- 30. ExceptionDesign 30 Top-up prepaid account system( User account is inactive ❗ Pass the reason code*
- 32. ExceptionDesign 32 Custom query defined in a config file( Unrecognized token found in the string ❗ Pass the place where the token starts*
- 35. ExceptionDesign 35 Adds to „Code is poetry” Easier problem diagnose Better problem understanding Faster problem solving
- 37. ExceptionDesign 37 HOW TO MAKE THINGS MORE OBVIOUS CHAINING 3737
- 38. ExceptionDesign 38 PEOPLE TEND TO FORGET THINGS EXCEPTIONS ARE STILL OBJECTS 38 SOMEBODY WILL READ IT DON’T OVER DO IT THINK 38
- 40. ExceptionDesign 40 WHAT HAVE WE LEARNED? SUMMARY HELPFUL TOOL 40 THERE’RE OTHER MECHANISMS HOW TO PLACE THEM HOW TO CREATE THEM 40 WHY THEY’RE HELPFUL
- 45. THANK YOU!