core

type ConfigMgr interface {
	AddSource(source ConfigSource, priority int) error
	GetConfigurations() map[string]interface{}
	GetConfigurationsByDimensionInfo(dimensionInfo string) (map[string]interface{}, error)
	AddDimensionInfo(dimensionInfo string) (map[string]string, error)
	GetConfigurationsByKey(key string) interface{}
	GetConfigurationsByKeyAndDimensionInfo(dimensionInfo, key string) interface{}
	IsKeyExist(string) bool
	Unmarshal(interface{}) error
	Refresh(sourceName string) error
	Cleanup()
}

type ConfigSource interface {
	GetSourceName() string
	GetConfigurations() (map[string]interface{}, error)
	GetConfigurationsByDI(dimensionInfo string) (map[string]interface{}, error)
	GetConfigurationByKey(string) (interface{}, error)
	GetConfigurationByKeyAndDimensionInfo(key, dimensionInfo string) (interface{}, error)
	AddDimensionInfo(dimensionInfo string) (map[string]string, error)
	DynamicConfigHandler(DynamicConfigCallback) error
	GetPriority() int
	Cleanup() error
}

type Dispatcher interface {
	// Function to send Events to all listener
	DispatchEvent(event *Event) error
	//Function to Register all listener for different key changes
	RegisterListener(listenerObj EventListener, keys ...string) error
	// remove listener
	UnRegisterListener(listenerObj EventListener, keys ...string) error
}

type DynamicConfigCallback interface {
	OnEvent(*Event)
}

type Event struct {
	EventSource string
	EventType   string
	Key         string
	Value       interface{}
}

type EventListener interface {
	Event(event *Event)
}