updater

type Fetcher interface {
	// FetchUpdate gets vulnerability updates.
	FetchUpdate(database.Datastore) (FetcherResponse, error)

	// Clean deletes any allocated resources.
	// It is invoked when Clair stops.
	Clean()
}

type FetcherResponse struct {
	FlagName        string
	FlagValue       string
	Notes           []string
	Vulnerabilities []database.Vulnerability
}

type MetadataFetcher interface {
	// Load runs right before the Updater calls AddMetadata for each vulnerabilities.
	Load(database.Datastore) error

	// AddMetadata adds metadata to the given database.Vulnerability.
	// It is expected that the fetcher uses .Lock.Lock() when manipulating the Metadata map.
	AddMetadata(*VulnerabilityWithLock) error

	// Unload runs right after the Updater finished calling AddMetadata for every vulnerabilities.
	Unload()

	// Clean deletes any allocated resources.
	// It is invoked when Clair stops.
	Clean()
}

type VulnerabilityWithLock struct {
	*database.Vulnerability
	Lock sync.Mutex
}