May 2021
Beginner to intermediate
380 pages
7h 48m
Korean
Content preview from 이벤트 기반 마이크로서비스 구축
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179
7
장
상태 저장 스트리밍
7.6.3
클라이언트-브로커 트랜잭션 없이 실제로 한 번 처리
클라이언트-브로커 트랜잭션을 지원하지 않는 이벤트 브로커도 실제로 한 번 처리는 가능하지
만 더 많은 작업이 필요하고 중복 이벤트에 주의해야 합니다. 첫째, 업스트림 서비스가 실제로
한 번 처리를 보장할 수 없다면 중복 레코드가 생성될 수 있기 때문에 중복 이벤트를 찾아내 걸
러내는 작업이 필요합니다. 둘째, 이벤트 처리가 시스템 상태에 한 번만 반영되도록 상태 및 오
프셋을 하나의 로컬 트랜잭션으로 업데이트해야 합니다. 그래야 클라이언트는 처리 도중 생성
된 내부 상태와 입력 이벤트 스트림의 논리적 맥락의 일관성을 맞출 수 있겠죠. 이 과정을 조금
더 구체적으로 살펴보겠습니다.
WARNING
_
사후에 중복 제거
deduplication
를 하려고 애쓰지 말고 멱등적 쓰기를 지원하는 이벤트 브로커와 클
라이언트를 이용하는 편이 낫습니다. 후자는 모든 컨슈머 애플리케이션에 쉽게 적용할 수 있지만, 전자는 비
용도 많이 들고 사용하기도 까다롭습니다.
중복 이벤트 생성
중복 이벤트는 프로듀서가 이벤트를 이벤트 스트림에 성공적으로 기록했지만 쓰기
ACK
를 받
지 못해 재시도를 하거나 해당 컨슈머 그룹의 오프셋을 업데이트하기 이전에 실패할 때 생성됩
니다. 자세한 경위는 시나리오에 따라 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.