forked from TrueCloudLab/distribution
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
package ipc
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import (
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"fmt"
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"io"
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"reflect"
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"github.com/docker/docker-registry/storagedriver"
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"github.com/docker/libchan"
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)
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// IPCStorageDriver is the interface which IPC storage drivers must implement. As external storage
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// drivers may be defined to use a different version of the storagedriver.StorageDriver interface,
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// we use an additional version check to determine compatiblity.
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type IPCStorageDriver interface {
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// Version returns the storagedriver.StorageDriver interface version which this storage driver
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// implements, which is used to determine driver compatibility
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Version() (storagedriver.Version, error)
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}
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// IncompatibleVersionError is returned when a storage driver is using an incompatible version of
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// the storagedriver.StorageDriver api
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type IncompatibleVersionError struct {
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version storagedriver.Version
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}
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func (e IncompatibleVersionError) Error() string {
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return fmt.Sprintf("Incompatible storage driver version: %s", e.version)
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}
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// Request defines a remote method call request
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// A return value struct is to be sent over the ResponseChannel
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type Request struct {
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Type string
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Parameters map[string]interface{}
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ResponseChannel libchan.Sender
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}
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type responseError struct {
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Type string
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Message string
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}
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// ResponseError wraps an error in a serializable struct containing the error's type and message
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func ResponseError(err error) *responseError {
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if err == nil {
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return nil
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}
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return &responseError{
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Type: reflect.TypeOf(err).String(),
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Message: err.Error(),
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}
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}
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func (err *responseError) Error() string {
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return fmt.Sprintf("%s: %s", err.Type, err.Message)
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}
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// IPC method call response object definitions
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// VersionResponse is a response for a Version request
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type VersionResponse struct {
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Version storagedriver.Version
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Error *responseError
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}
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// ReadStreamResponse is a response for a ReadStream request
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type ReadStreamResponse struct {
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Reader io.ReadCloser
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Error *responseError
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}
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// WriteStreamResponse is a response for a WriteStream request
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type WriteStreamResponse struct {
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Error *responseError
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}
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// CurrentSizeResponse is a response for a CurrentSize request
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type CurrentSizeResponse struct {
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Position uint64
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Error *responseError
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}
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// ListResponse is a response for a List request
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type ListResponse struct {
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Keys []string
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Error *responseError
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}
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// MoveResponse is a response for a Move request
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type MoveResponse struct {
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Error *responseError
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}
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// DeleteResponse is a response for a Delete request
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type DeleteResponse struct {
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Error *responseError
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}
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