December 2020
Intermediate to advanced
256 pages
8h 30m
Polish
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Rozdział 10. Polecenia i procedury obsługi poleceń
W poprzednim rozdziale omówiliśmy sposób użycia zdarzeń do reprezentacji danych wejściowych do naszego systemu i zamieniliśmy naszą aplikację w system przetwarzania wiadomości.
W tym celu zamieniliśmy wszystkie nasze funkcje przypadków użycia na procedury obsługi zdarzeń. Kiedy API otrzymuje żądanie POST utworzenia nowej partii, tworzy nowe zdarzenie BatchCreated i obsługuje je tak, jakby to było zdarzenie wewnętrzne. Może się to wydawać sprzeczne ze zdrowym rozsądkiem. Przecież partia jeszcze nie została utworzona. Dlatego wywołaliśmy API. Wyeliminujemy ten zgrzyt przez wprowadzenie poleceń, a przy okazji pokażemy, jak je obsługiwać za pomocą tej samej szyny wiadomości, choć przy zastosowaniu ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.