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Lucifier129 avatar Lucifier129 commented on May 27, 2024 1

Remesh.domain 不支持泛型,这是 TypeScript 类型系统层面约束的。Remesh Module 是普通的函数,它支持泛型。

包一层 factory 传递泛型参数并加上 memoize 是不安全的,会导致两个不同泛型参数的 domain 实例是同一份。

除非 factory + memoize + memo-key 让泛型类型和缓存 key 一一对应。

const DomainMap = new Map<string>()

export const GenericDomain = <T>(key: string)=> {
  if (DomainMap.has(key) return DomainMap.get(key)!
  return Remesh.domain(...)
}

useRemeshDomain(GenericDomain<Message>('message'))

useRemeshDomain(GenericDomain<User>('user'))

// 封装一下

const MessageDomain = GenericDomain<Message>('message')
const UserDomain = GenericDomain<User>('user')

其实这个做法,用 Remesh Module 实现也可以,还能传递参数。

const GenericModule = <T>(domain: RemeshDomainContext, args) => {
  // return { query, command, event }
}

const MessageDomain = Remesh.domain({
  ...,
  impl: domain => {
    const { query, command, event } = GenericModule<Message>(domain, ...)
  } 
})

const UserDomain = Remesh.domain({
  ...,
  impl: domain => {
    const { query, command, event } = GenericModule<User>(domain, ...)
  } 
})

from remesh.

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