Component - *Component.ts

A file naming convention rather than a JSON descriptor. Any TypeScript file whose name ends in Component.ts is treated as a dependency-injected component by engine-di. Used by other TypeScript code through @aerokit/sdk/component.

File pattern

import { Component } from "@aerokit/sdk/component";

@Component("CountryComponent")
export class CountryComponent {
    public list() {
        return ["US", "DE", "BG"];
    }
}

The decorator argument is the bean name used for lookup. The component class is singleton-scoped.

Looking up components

import { lookup } from "@aerokit/sdk/component";

const countries = lookup("CountryComponent");
countries.list();

Inside another component the canonical pattern is field injection via @Inject:

import { Component, Inject } from "@aerokit/sdk/component";

@Component("OrderController")
export class OrderController {

    @Inject("CountryComponent")
    private readonly countries!: CountryComponent;
}

Java equivalent

The Java counterpart is @Repository + @Inject, processed by engine-java and data-store-java. See /help/develop/dependency-injection.

See also

• @aerokit/sdk/component
• Dependency injection (develop)
• Extensibility (concepts)