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adapter.go
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adapter.go
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package mem
import (
"bytes"
"context"
"crypto/sha256"
"encoding/hex"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"sort"
"strings"
"sync"
"github.com/google/uuid"
"github.com/treeverse/lakefs/pkg/block"
"github.com/treeverse/lakefs/pkg/block/adapter"
"github.com/treeverse/lakefs/pkg/logging"
)
var (
ErrNoDataForKey = fmt.Errorf("no data for key: %w", adapter.ErrDataNotFound)
ErrMultiPartNotFound = fmt.Errorf("multipart ID not found")
ErrNoPropertiesForKey = fmt.Errorf("no properties for key")
ErrInventoryNotImplemented = errors.New("inventory feature not implemented for memory storage adapter")
)
type mpu struct {
id string
parts map[int64][]byte
}
func newMPU() *mpu {
uid := uuid.New()
uploadID := hex.EncodeToString(uid[:])
return &mpu{
id: uploadID,
parts: make(map[int64][]byte),
}
}
func (m *mpu) get() []byte {
buf := bytes.NewBuffer(nil)
keys := make([]int64, len(m.parts))
sort.Slice(keys, func(i, j int) bool {
return keys[i] < keys[j]
})
for _, part := range keys {
buf.Write(m.parts[part])
}
return buf.Bytes()
}
type Adapter struct {
data map[string][]byte
mpu map[string]*mpu
properties map[string]block.Properties
mutex *sync.RWMutex
uploadIDTranslator block.UploadIDTranslator
}
func New(opts ...func(a *Adapter)) *Adapter {
a := &Adapter{
uploadIDTranslator: &block.NoOpTranslator{},
data: make(map[string][]byte),
mpu: make(map[string]*mpu),
properties: make(map[string]block.Properties),
mutex: &sync.RWMutex{},
}
for _, opt := range opts {
opt(a)
}
return a
}
func WithTranslator(t block.UploadIDTranslator) func(a *Adapter) {
return func(a *Adapter) {
a.uploadIDTranslator = t
}
}
func getKey(obj block.ObjectPointer) string {
return fmt.Sprintf("%s:%s", obj.StorageNamespace, obj.Identifier)
}
func getPrefix(lsOpts block.WalkOpts) string {
return fmt.Sprintf("%s:%s", lsOpts.StorageNamespace, lsOpts.Prefix)
}
func (a *Adapter) Put(_ context.Context, obj block.ObjectPointer, sizeBytes int64, reader io.Reader, opts block.PutOpts) error {
a.mutex.Lock()
defer a.mutex.Unlock()
data, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
key := getKey(obj)
a.data[key] = data
a.properties[key] = block.Properties(opts)
return nil
}
func (a *Adapter) Get(_ context.Context, obj block.ObjectPointer, expectedSize int64) (io.ReadCloser, error) {
a.mutex.RLock()
defer a.mutex.RUnlock()
data, ok := a.data[getKey(obj)]
if !ok {
return nil, ErrNoDataForKey
}
return ioutil.NopCloser(bytes.NewReader(data)), nil
}
func (a *Adapter) Exists(_ context.Context, obj block.ObjectPointer) (bool, error) {
a.mutex.RLock()
defer a.mutex.RUnlock()
_, ok := a.data[getKey(obj)]
return ok, nil
}
func (a *Adapter) GetRange(_ context.Context, obj block.ObjectPointer, startPosition int64, endPosition int64) (io.ReadCloser, error) {
a.mutex.RLock()
defer a.mutex.RUnlock()
data, ok := a.data[getKey(obj)]
if !ok {
return nil, ErrNoDataForKey
}
return ioutil.NopCloser(io.NewSectionReader(bytes.NewReader(data), startPosition, endPosition-startPosition+1)), nil
}
func (a *Adapter) GetProperties(_ context.Context, obj block.ObjectPointer) (block.Properties, error) {
a.mutex.RLock()
defer a.mutex.RUnlock()
props, ok := a.properties[getKey(obj)]
if !ok {
return block.Properties{}, ErrNoPropertiesForKey
}
return props, nil
}
func (a *Adapter) Remove(_ context.Context, obj block.ObjectPointer) error {
a.mutex.Lock()
defer a.mutex.Unlock()
delete(a.data, getKey(obj))
return nil
}
func (a *Adapter) Copy(_ context.Context, sourceObj, destinationObj block.ObjectPointer) error {
a.mutex.Lock()
defer a.mutex.Unlock()
destinationKey := getKey(destinationObj)
sourceKey := getKey(sourceObj)
a.data[destinationKey] = a.data[sourceKey]
a.properties[destinationKey] = a.properties[sourceKey]
return nil
}
func (a *Adapter) UploadCopyPart(ctx context.Context, sourceObj, destinationObj block.ObjectPointer, uploadID string, partNumber int64) (string, error) {
a.mutex.Lock()
defer a.mutex.Unlock()
uploadID = a.uploadIDTranslator.TranslateUploadID(uploadID)
mpu, ok := a.mpu[uploadID]
if !ok {
return "", ErrMultiPartNotFound
}
entry, err := a.Get(ctx, sourceObj, 0)
if err != nil {
return "", err
}
data, err := ioutil.ReadAll(entry)
if err != nil {
return "", err
}
h := sha256.New()
_, err = h.Write(data)
if err != nil {
return "", err
}
code := h.Sum(nil)
mpu.parts[partNumber] = data
return fmt.Sprintf("%x", code), nil
}
func (a *Adapter) UploadCopyPartRange(_ context.Context, sourceObj, _ block.ObjectPointer, uploadID string, partNumber, startPosition, endPosition int64) (string, error) {
a.mutex.Lock()
defer a.mutex.Unlock()
uploadID = a.uploadIDTranslator.TranslateUploadID(uploadID)
mpu, ok := a.mpu[uploadID]
if !ok {
return "", ErrMultiPartNotFound
}
data, ok := a.data[getKey(sourceObj)]
if !ok {
return "", ErrNoDataForKey
}
reader := io.NewSectionReader(bytes.NewReader(data), startPosition, endPosition-startPosition+1)
data, err := ioutil.ReadAll(reader)
if err != nil {
return "", err
}
h := sha256.New()
_, err = h.Write(data)
if err != nil {
return "", err
}
code := h.Sum(nil)
mpu.parts[partNumber] = data
return fmt.Sprintf("%x", code), nil
}
func (a *Adapter) CreateMultiPartUpload(_ context.Context, obj block.ObjectPointer, r *http.Request, opts block.CreateMultiPartUploadOpts) (string, error) {
a.mutex.Lock()
defer a.mutex.Unlock()
mpu := newMPU()
a.mpu[mpu.id] = mpu
tid := a.uploadIDTranslator.SetUploadID(mpu.id)
return tid, nil
}
func (a *Adapter) UploadPart(_ context.Context, obj block.ObjectPointer, sizeBytes int64, reader io.Reader, uploadID string, partNumber int64) (string, error) {
a.mutex.Lock()
defer a.mutex.Unlock()
uploadID = a.uploadIDTranslator.TranslateUploadID(uploadID)
mpu, ok := a.mpu[uploadID]
if !ok {
return "", ErrMultiPartNotFound
}
data, err := ioutil.ReadAll(reader)
if err != nil {
return "", err
}
h := sha256.New()
_, err = h.Write(data)
if err != nil {
return "", err
}
code := h.Sum(nil)
mpu.parts[partNumber] = data
return fmt.Sprintf("%x", code), nil
}
func (a *Adapter) AbortMultiPartUpload(_ context.Context, obj block.ObjectPointer, uploadID string) error {
a.mutex.Lock()
defer a.mutex.Unlock()
uploadID = a.uploadIDTranslator.TranslateUploadID(uploadID)
_, ok := a.mpu[uploadID]
if !ok {
return ErrMultiPartNotFound
}
delete(a.mpu, uploadID)
a.uploadIDTranslator.RemoveUploadID(uploadID)
return nil
}
func (a *Adapter) CompleteMultiPartUpload(_ context.Context, obj block.ObjectPointer, uploadID string, _ *block.MultipartUploadCompletion) (*string, int64, error) {
a.mutex.Lock()
defer a.mutex.Unlock()
uploadID = a.uploadIDTranslator.TranslateUploadID(uploadID)
mpu, ok := a.mpu[uploadID]
if !ok {
return nil, 0, ErrMultiPartNotFound
}
data := mpu.get()
h := sha256.New()
_, err := h.Write(data)
if err != nil {
return nil, 0, err
}
code := h.Sum(nil)
hexCode := fmt.Sprintf("%x", code)
a.uploadIDTranslator.RemoveUploadID(uploadID)
a.data[getKey(obj)] = data
return &hexCode, int64(len(data)), nil
}
func (a *Adapter) Walk(_ context.Context, walkOpt block.WalkOpts, walkFn block.WalkFunc) error {
a.mutex.RLock()
defer a.mutex.RUnlock()
fullPrefix := getPrefix(walkOpt)
for k := range a.data {
if strings.HasPrefix(k, fullPrefix) {
if err := walkFn(k); err != nil {
return err
}
}
}
return nil
}
func (a *Adapter) ValidateConfiguration(_ context.Context, _ string) error {
return nil
}
func (a *Adapter) GenerateInventory(_ context.Context, _ logging.Logger, _ string, _ bool, _ []string) (block.Inventory, error) {
return nil, ErrInventoryNotImplemented
}
func (a *Adapter) BlockstoreType() string {
return block.BlockstoreTypeMem
}
func (a *Adapter) GetStorageNamespaceInfo() block.StorageNamespaceInfo {
return block.DefaultStorageNamespaceInfo(block.BlockstoreTypeMem)
}
func (a *Adapter) RuntimeStats() map[string]string {
return nil
}