cloudimagemetadata

type DataStore interface {

	// RunTransaction runs desired transactions against this data source..
	RunTransaction(jujutxn.TransactionSource) error

	// GetCollection retrieves desired collection from this data source.
	GetCollection(name string) (collection mongo.Collection, closer func())
}

type Metadata struct {
	MetadataAttributes

	// ImageId contains image identifier.
	ImageId string
}

type MetadataAttributes struct {
	// Stream contains reference to a particular stream,
	// for e.g. "daily" or "released"
	Stream string

	// Region is the name of cloud region associated with the image.
	Region string

	// Series is Os version, for e.g. "quantal".
	Series string

	// Arch is the architecture for this cloud image, for e.g. "amd64"
	Arch string

	// VirtType contains virtualisation type of the cloud image, for e.g. "pv", "hvm". "kvm".
	VirtType string

	// RootStorageType contains type of root storage, for e.g. "ebs", "instance".
	RootStorageType string

	// RootStorageSize contains size of root storage in gigabytes (GB).
	RootStorageSize *uint64

	// Source describes where this image is coming from: is it public? custom?
	Source SourceType
}

type MetadataFilter struct {
	// Region stores metadata region.
	Region string `json:"region,omitempty"`

	// Series stores all desired series.
	Series []string `json:"series,omitempty"`

	// Arches stores all desired architectures.
	Arches []string `json:"arches,omitempty"`

	// Stream can be "" or "released" for the default "released" stream,
	// or "daily" for daily images, or any other stream that the available
	// simplestreams metadata supports.
	Stream string `json:"stream,omitempty"`

	// VirtType stores virtualisation type.
	VirtType string `json:"virt_type,omitempty"`

	// RootStorageType stores storage type.
	RootStorageType string `json:"root-storage-type,omitempty"`
}

type SourceType string

type Storage interface {
	// SaveMetadata adds cloud images metadata into state if it's new or
	// updates metadata if it already exists,
	SaveMetadata(Metadata) error

	// FindMetadata returns all Metadata that match specified
	// criteria or a "not found" error if none match.
	// Empty criteria will return all cloud image metadata.
	// Returned result is grouped by source type and ordered by date created.
	FindMetadata(criteria MetadataFilter) (map[SourceType][]Metadata, error)
}