lookup

Documentation

Index

• func DetectBackendOnDisk(root string) string
• func Pathify(id string, depth, width int) string
• type Lookup
  • func New(b metadata.Backend, o *options.Options) *Lookup
  • func (lu *Lookup) CopyMetadata(ctx context.Context, src, target string, ...) (err error)
  • func (lu *Lookup) CopyMetadataWithSourceLock(ctx context.Context, sourcePath, targetPath string, ...) (err error)
  • func (lu *Lookup) InternalPath(spaceID, nodeID string) string
  • func (lu *Lookup) InternalRoot() string
  • func (lu *Lookup) MetadataBackend() metadata.Backend
  • func (lu *Lookup) NodeFromID(ctx context.Context, id *provider.ResourceId) (n *node.Node, err error)
  • func (lu *Lookup) NodeFromResource(ctx context.Context, ref *provider.Reference) (*node.Node, error)
  • func (lu *Lookup) NodeFromSpaceID(ctx context.Context, spaceID string) (n *node.Node, err error)
  • func (lu *Lookup) Path(ctx context.Context, n *node.Node, hasPermission node.PermissionFunc) (p string, err error)
  • func (lu *Lookup) ReadBlobIDAttr(ctx context.Context, path string) (string, error)
  • func (lu *Lookup) ReadBlobSizeAttr(ctx context.Context, path string) (int64, error)
  • func (lu *Lookup) TypeFromPath(ctx context.Context, path string) provider.ResourceType
  • func (lu *Lookup) WalkPath(ctx context.Context, r *node.Node, p string, followReferences bool, ...) (*node.Node, error)
• type PathLookup

Functions

func DetectBackendOnDisk

func DetectBackendOnDisk(root string) string

DetectBackendOnDisk returns the name of the metadata backend being used on disk

func Pathify

func Pathify(id string, depth, width int) string

Pathify segments the beginning of a string into depth segments of width length Pathify("aabbccdd", 3, 1) will return "a/a/b/bccdd"

Types

type Lookup

type Lookup struct {
	Options *options.Options
	// contains filtered or unexported fields
}

Lookup implements transformations from filepath to node and back

func New

func New(b metadata.Backend, o *options.Options) *Lookup

New returns a new Lookup instance

func (*Lookup) CopyMetadata

func (lu *Lookup) CopyMetadata(ctx context.Context, src, target string, filter func(attributeName string, value []byte) (newValue []byte, copy bool), acquireTargetLock bool) (err error)

CopyMetadata copies all extended attributes from source to target. The optional filter function can be used to filter by attribute name, e.g. by checking a prefix For the source file, a shared lock is acquired. NOTE: target resource will be write locked!

func (*Lookup) CopyMetadataWithSourceLock

func (lu *Lookup) CopyMetadataWithSourceLock(ctx context.Context, sourcePath, targetPath string, filter func(attributeName string, value []byte) (newValue []byte, copy bool), lockedSource *lockedfile.File, acquireTargetLock bool) (err error)

CopyMetadataWithSourceLock copies all extended attributes from source to target. The optional filter function can be used to filter by attribute name, e.g. by checking a prefix For the source file, a matching lockedfile is required. NOTE: target resource will be write locked!

func (*Lookup) InternalPath

func (lu *Lookup) InternalPath(spaceID, nodeID string) string

InternalPath returns the internal path for a given ID

func (*Lookup) InternalRoot

func (lu *Lookup) InternalRoot() string

InternalRoot returns the internal storage root directory

func (*Lookup) MetadataBackend

func (lu *Lookup) MetadataBackend() metadata.Backend

MetadataBackend returns the metadata backend

func (*Lookup) NodeFromID

func (lu *Lookup) NodeFromID(ctx context.Context, id *provider.ResourceId) (n *node.Node, err error)

NodeFromID returns the internal path for the id

func (*Lookup) NodeFromResource

func (lu *Lookup) NodeFromResource(ctx context.Context, ref *provider.Reference) (*node.Node, error)

NodeFromResource takes in a request path or request id and converts it to a Node

func (*Lookup) NodeFromSpaceID

func (lu *Lookup) NodeFromSpaceID(ctx context.Context, spaceID string) (n *node.Node, err error)

NodeFromSpaceID converts a resource id into a Node

func (*Lookup) Path

func (lu *Lookup) Path(ctx context.Context, n *node.Node, hasPermission node.PermissionFunc) (p string, err error)

Path returns the path for node

func (*Lookup) ReadBlobIDAttr

func (lu *Lookup) ReadBlobIDAttr(ctx context.Context, path string) (string, error)

ReadBlobIDAttr reads the blobsize from the xattrs

func (*Lookup) ReadBlobSizeAttr

func (lu *Lookup) ReadBlobSizeAttr(ctx context.Context, path string) (int64, error)

ReadBlobSizeAttr reads the blobsize from the xattrs

func (*Lookup) TypeFromPath

func (lu *Lookup) TypeFromPath(ctx context.Context, path string) provider.ResourceType

TypeFromPath returns the type of the node at the given path

func (*Lookup) WalkPath

func (lu *Lookup) WalkPath(ctx context.Context, r *node.Node, p string, followReferences bool, f func(ctx context.Context, n *node.Node) error) (*node.Node, error)

WalkPath calls n.Child(segment) on every path segment in p starting at the node r. If a function f is given it will be executed for every segment node, but not the root node r. If followReferences is given the current visited reference node is replaced by the referenced node.

type PathLookup

type PathLookup interface {
	NodeFromResource(ctx context.Context, ref *provider.Reference) (*node.Node, error)
	NodeFromID(ctx context.Context, id *provider.ResourceId) (n *node.Node, err error)

	InternalRoot() string
	InternalPath(spaceID, nodeID string) string
	Path(ctx context.Context, n *node.Node, hasPermission node.PermissionFunc) (path string, err error)
	MetadataBackend() metadata.Backend
	ReadBlobSizeAttr(ctx context.Context, path string) (int64, error)
	ReadBlobIDAttr(ctx context.Context, path string) (string, error)
	TypeFromPath(ctx context.Context, path string) provider.ResourceType
}

PathLookup defines the interface for the lookup component