configuration

type Configuration interface {
	// GetCondition returns a named condition from the configuration, if it
	// finds it.
	//
	// Any attempt to close the returned the condition is without effect.
	GetCondition(name string) conditional.Condition

	// AddCondition adds a named condition to the configuration.
	//
	// The caller should never use the passed-in condition directly ever again.
	AddCondition(name string, condition conditional.Condition) error

	// Watch the configuration triggers until the specified context expires or
	// the watch fails.
	Watch(ctx context.Context) error

	// Clear the configuration, freeing any resource associated with it.
	//
	// The configuration can be reused again after a call to Clear.
	Clear()

	// Close the configuration.
	//
	// Must be called when the configuration is no longer needed, to free all
	// its resources.
	Close()
}