ComponentsResolving Components
Resolve by Name
Resolve a named component as a target type.
Use component.Resolve when the component name matters.
func SendAuditMail(
ctx context.Context,
container component.Container,
) error {
mailer, err := component.Resolve[Mailer](
ctx,
container,
"auditMailer",
)
if err != nil {
return err
}
return mailer.Send("admin@example.com", "audit event")
}Named resolution is useful when multiple components implement the same interface and boundary code needs a specific one.
Check names
Use component.CanResolve when the name is optional.
if component.CanResolve(container, "auditMailer") {
// Resolve and use the optional component.
}Prefer constructor qualifiers when the named dependency is required by a normal component.