cache

type Cache interface {
	StorePods([]source_api.Pod) error
	StoreContainers([]source_api.Container) error
	// TODO: Handle events.
	// GetPods returns a list of pod elements in the cache between 'start' and 'end'.
	// If 'start' is zero, it returns all the elements up until 'end'.
	// If 'end' is zero, it returns all the elements from 'start'.
	// If both 'start' and 'end' are zero, it returns all the elements in the cache.
	GetPods(start, end time.Time) []*PodElement

	// GetNodes returns a list of pod elements in the cache between 'start' and 'end'.
	// If 'start' is zero, it returns all the elements up until 'end'.
	// If 'end' is zero, it returns all the elements from 'start'.
	// If both 'start' and 'end' are zero, it returns all the elements in the cache.
	GetNodes(start, end time.Time) []*ContainerElement

	// GetFreeContainers returns a list of pod elements in the cache between 'start' and 'end'.
	// If 'start' is zero, it returns all the elements up until 'end'.
	// If 'end' is zero, it returns all the elements from 'start'.
	// If both 'start' and 'end' are zero, it returns all the elements in the cache.
	GetFreeContainers(start, end time.Time) []*ContainerElement
}

type ContainerElement struct {
	Metadata
	Metrics []*ContainerMetricElement
}

type ContainerMetricElement struct {
	Spec  *cadvisor_api.ContainerSpec
	Stats *cadvisor_api.ContainerStats
}

type Metadata struct {
	Name         string
	Namespace    string
	NamespaceUID string
	UID          string
	Hostname     string
	Labels       map[string]string
	ExternalID   string
}

type PodElement struct {
	Metadata
	// map of container name to container element.
	Containers []*ContainerElement
}