September 2025
Intermediate to advanced
484 pages
14h 54m
Portuguese (Portugal, Brazil)
Content preview from Construindo microsserviços orientados a eventos, 2nd Edition
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Capítulo 8. Microsserviços orientados por eventos com estado
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
Os microsserviços orientados por eventos (com ou sem estado) geralmente seguem as mesmas três etapas básicas:
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Reactar ao evento; por exemplo, de um fluxo de entrada, uma solicitação remota de um cliente, uma leitura de sensor ou uma inserção de linha em um banco de dados.
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Processar esse evento.
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Produzir qualquer evento de saída resultante.
Há muitos detalhes que estão faltando nessa lista simples, mas ela mostra o coração de como a grande maioria dos microsserviços orientados por eventos opera. Neste capítulo, você se aprofundará na função que o estado desempenha, especialmente porque a maioria dos microsserviços precisa manter algum grau de estado para realmente fazer algo útil.
Essa lista de três etapas é importante para avaliar o estado dos microsserviços orientados por eventos, especialmente quando os serviços são dimensionados, falham e se recuperam. Como podemos garantir que as partições corretas sejam atribuídas às instâncias corretas do consumidor? E como lidamos com vários fluxos, cada um com seu próprio particionamento e particionadores? Este capítulo fornecerá a você as respostas.
Os armazenamentos de estado desempenham um papel importante na grande maioria dos microsserviços orientados por eventos e andam de mãos dadas com as atribuições de partição de fluxo. Eles são, francamente, ...
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