67 lines
1.5 KiB
Plaintext
67 lines
1.5 KiB
Plaintext
export const metadata = {
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title: `${pageNumber} Module's Container`,
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}
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# {metadata.title}
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In this chapter, you'll learn about the module's container and how to resolve resources in that container.
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## Module's Container
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Each module has a local container only used by the resources of that module.
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So, resources in the module, such as services or loaders, can only resolve other resources registered in the module's container, such as:
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- `logger`: A utility to log message in the Medusa application's logs.
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---
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## Resolve Resources
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### Services
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A service's constructor accepts as a first parameter an object used to resolve resources registered in the module's container.
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For example:
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```ts highlights={[["4"], ["10"]]}
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import { Logger } from "@medusajs/medusa"
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type InjectedDependencies = {
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logger: Logger
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}
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export default class HelloModuleService {
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protected logger_: Logger
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constructor({ logger }: InjectedDependencies) {
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this.logger_ = logger
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this.logger_.info("[HelloModuleService]: Hello World!")
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}
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// ...
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}
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```
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### Loader
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A loader function accepts as a parameter an object having the property `container`. Its value is the module's container used to resolve resources.
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For example:
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```ts highlights={[["9"]]}
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import {
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LoaderOptions,
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} from "@medusajs/modules-sdk"
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import { Logger } from "@medusajs/medusa"
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export default async function helloWorldLoader({
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container,
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}: LoaderOptions) {
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const logger: Logger = container.resolve("logger")
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logger.info("[helloWorldLoader]: Hello, World!")
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}
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```
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