forked from TrueCloudLab/distribution
a4024b2f90
Because manifests and their signatures are a discrete component of the registry, we are moving the definitions into a separate package. This causes us to lose some test coverage, but we can fill this in shortly. No changes have been made to the external interfaces, but they are likely to come. Signed-off-by: Stephen J Day <stephen.day@docker.com>
87 lines
2.9 KiB
Go
87 lines
2.9 KiB
Go
package storage
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import (
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"github.com/docker/distribution/digest"
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"github.com/docker/distribution/manifest"
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"github.com/docker/distribution/storagedriver"
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)
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// Services provides various services with application-level operations for
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// use across backend storage drivers.
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type Services struct {
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driver storagedriver.StorageDriver
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pathMapper *pathMapper
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layerUploadStore layerUploadStore
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}
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// NewServices creates a new Services object to access docker objects stored
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// in the underlying driver.
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func NewServices(driver storagedriver.StorageDriver) *Services {
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layerUploadStore, err := newTemporaryLocalFSLayerUploadStore()
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if err != nil {
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// TODO(stevvooe): This failure needs to be understood in the context
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// of the lifecycle of the services object, which is uncertain at this
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// point.
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panic("unable to allocate layerUploadStore: " + err.Error())
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}
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return &Services{
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driver: driver,
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pathMapper: &pathMapper{
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// TODO(sday): This should be configurable.
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root: "/docker/registry/",
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version: storagePathVersion,
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},
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layerUploadStore: layerUploadStore,
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}
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}
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// Layers returns an instance of the LayerService. Instantiation is cheap and
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// may be context sensitive in the future. The instance should be used similar
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// to a request local.
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func (ss *Services) Layers() LayerService {
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return &layerStore{driver: ss.driver, pathMapper: ss.pathMapper, uploadStore: ss.layerUploadStore}
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}
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// Manifests returns an instance of ManifestService. Instantiation is cheap and
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// may be context sensitive in the future. The instance should be used similar
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// to a request local.
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func (ss *Services) Manifests() ManifestService {
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return &manifestStore{driver: ss.driver, pathMapper: ss.pathMapper, layerService: ss.Layers()}
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}
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// ManifestService provides operations on image manifests.
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type ManifestService interface {
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// Tags lists the tags under the named repository.
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Tags(name string) ([]string, error)
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// Exists returns true if the layer exists.
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Exists(name, tag string) (bool, error)
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// Get retrieves the named manifest, if it exists.
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Get(name, tag string) (*manifest.SignedManifest, error)
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// Put creates or updates the named manifest.
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Put(name, tag string, manifest *manifest.SignedManifest) error
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// Delete removes the named manifest, if it exists.
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Delete(name, tag string) error
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}
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// LayerService provides operations on layer files in a backend storage.
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type LayerService interface {
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// Exists returns true if the layer exists.
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Exists(name string, digest digest.Digest) (bool, error)
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// Fetch the layer identifed by TarSum.
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Fetch(name string, digest digest.Digest) (Layer, error)
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// Upload begins a layer upload to repository identified by name,
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// returning a handle.
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Upload(name string) (LayerUpload, error)
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// Resume continues an in progress layer upload, returning the current
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// state of the upload.
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Resume(uuid string) (LayerUpload, error)
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}
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