April 2025
Intermediate to advanced
304 pages
7h 41m
Portuguese (Portugal, Brazil)
Content preview from Padrões de arquitetura com Python
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Parte II. Arquitetura orientada para eventos
Desculpa ter cunhado há muito tempo o termo "objectos" para este tópico, porque faz com que muitas pessoas se concentrem na ideia menos importante.
A grande ideia é "mensagens"... A chave para criar sistemas fantásticos e que possam crescer é muito mais conceber a forma como os seus módulos comunicam do que quais devem ser as suas propriedades e comportamentos internos.
Alan Kay
É muito bom poder escrever um modelo de domínio para gerir um único processo comercial, mas o que acontece quando precisamos de escrever muitos modelos? No mundo real, nossas aplicações estão dentro de uma organização e precisam trocar informações com outras partes do sistema. Talvez te lembres do nosso diagrama de contexto apresentado na Figura II-1.
Perante este requisito, muitas equipas optam por microsserviços integrados através de APIs HTTP. Mas se não tiverem cuidado, acabam por produzir a confusão mais caótica de todas: a grande bola de lama distribuída.
Na Parte II, mostraremos como as técnicas da Parte I podem ser estendidas para sistemas distribuídos. Vamos ver como podemos compor um sistema a partir de muitos componentes pequenos que interagem através da passagem assíncrona de mensagens.
Veremos como os nossos padrões Service Layer e Unit of Work nos permitem reconfigurar a nossa aplicação para ser executada como um processador de mensagens assíncrono e como os sistemas orientados por eventos nos ajudam a dissociar agregados e aplicações uns dos ...
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