Bind-DI Decorators

Decorator	Parameters	Applies to	Description
@Component	Optionally takes a string or Symbol. If string of Symbol is passed it becomes the unique Identifier of component	Class or Method of Component factory	If applied to a method of a class, that class must itself be decorated with @Component and must be a Singleton component
@Inject	Optionally takes a string or Symbol as Identifier of dependency component	Class method Class setter function Constructor argument	Component with smaller Lifecycle scope cannot be a dependency of component with broader Lifecycle scope. For example a NewInstance scoped component cannot be a dependency of Singleton-scoped component. This rule is enforced during container initialization stage.
@PostConstruct	None	Class method	Method decorated with this decorator must return Promise<boolean> or throw Error with description of a problem. Only Singleton Component can have method with this decorator and Only One method of a class can have this decorator.
@PreDestroy	None	Class method	Method decorated with this decorator must return Promise<boolean> or throw Error with description of a problem. Only Singleton Component can have method with this decorator and Only One method of a class can have this decorator.
@Scope	One of values of ComponentScope enum	Component Class	Components have default scope. Default scope for all components is defined by Container’s .defaultScope parameter. This decorator overrides the default scope of component
@Singleton	None	Class	This decorator is a shorthand for @Scope(ComponentScope.SINGLETON)
@NewInstance	None	Class	This decorator is a shorthand for @Scope(ComponentScope.NEWINSTANCE)
@Environment	Variable number of strings	Component Class	A Component that has @Environment(“DEV”, “TEST”) will only be added to Container if NODE_ENV environment variable is set to either ‘DEV’ or ‘TEST’. This allows to have multiple components with the same unique Identifier but with different values of @Enviromnent and have different components loaded in Development, Testing, Production, etc.
@EnvOverride	None	Component Class	Component decorated with @EnvOverride is turned into a Proxy object. Any property of Component class can now be overwritten by the value set in Environment.