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[#539] getsvc: Write payload direct to out stream

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To reduce memory allocations.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
This commit is contained in:
Dmitrii Stepanov 2023-07-24 14:34:56 +03:00
parent 286242cad0
commit 99bb488ebd
4 changed files with 27 additions and 28 deletions
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9
pkg/services/object/get/assemble.go
View file

@ -113,9 +113,10 @@ func (r *request) HeadObject(ctx context.Context, id oid.ID) (*objectSDK.Object,
return w.Object(), nil
}
func (r *request) GetObject(ctx context.Context, id oid.ID, rng *objectSDK.Range, payloadBuffer []byte) (*objectSDK.Object, error) {
w := NewSimpleObjectWriter()
w.SetPayloadBuffer(payloadBuffer)
func (r *request) GetObjectAndWritePayload(ctx context.Context, id oid.ID, rng *objectSDK.Range, writer ChunkWriter) (*objectSDK.Object, error) {
w := &payloadWriter{
origin: writer,
}
p := r.prm
p.common = p.common.WithLocalOnly(false)
@ -128,7 +129,7 @@ func (r *request) GetObject(ctx context.Context, id oid.ID, rng *objectSDK.Range
if err := r.getObjectWithIndependentRequest(ctx, p); err != nil {
return nil, err
}
return w.Object(), nil
return w.obj, nil
}
func (r *request) getObjectWithIndependentRequest(ctx context.Context, prm RequestParameters) error {

19
pkg/services/object/get/assembler.go
View file

@ -10,7 +10,7 @@ import (
)
type objectGetter interface {
GetObject(ctx context.Context, id oid.ID, rng *objectSDK.Range, buffer []byte) (*objectSDK.Object, error)
GetObjectAndWritePayload(ctx context.Context, id oid.ID, rng *objectSDK.Range, writer ChunkWriter) (*objectSDK.Object, error)
HeadObject(ctx context.Context, id oid.ID) (*objectSDK.Object, error)
}
@ -77,10 +77,12 @@ func (a *assembler) getLastPartOrLinkObjectID() (oid.ID, bool) {
}
func (a *assembler) initializeFromSourceObjectID(ctx context.Context, id oid.ID) (*oid.ID, []oid.ID, error) {
sourceObject, err := a.getChildObject(ctx, id, nil, true, nil)
w := NewSimpleObjectWriter()
sourceObject, err := a.getChildObject(ctx, id, nil, true, w)
if err != nil {
return nil, nil, err
}
sourceObject.SetPayload(w.pld)
parentObject := sourceObject.Parent()
if parentObject == nil {
@ -131,8 +133,8 @@ func (a *assembler) initializeFromSourceObjectID(ctx context.Context, id oid.ID)
return nil, sourceObject.Children(), nil
}
func (a *assembler) getChildObject(ctx context.Context, id oid.ID, rng *objectSDK.Range, verifyIsChild bool, payloadBuffer []byte) (*objectSDK.Object, error) {
obj, err := a.objGetter.GetObject(ctx, id, rng, payloadBuffer)
func (a *assembler) getChildObject(ctx context.Context, id oid.ID, rng *objectSDK.Range, verifyIsChild bool, writer ChunkWriter) (*objectSDK.Object, error) {
obj, err := a.objGetter.GetObjectAndWritePayload(ctx, id, rng, writer)
if err != nil {
return nil, err
}
@ -176,23 +178,16 @@ func (a *assembler) assemleObjectByPreviousIDInReverse(ctx context.Context, prev
func (a *assembler) assemblePayloadByObjectIDs(ctx context.Context, writer ObjectWriter, partIDs []oid.ID, partRanges []objectSDK.Range, verifyIsChild bool) error {
withRng := len(partRanges) > 0 && a.rng != nil
var buffer []byte
for i := range partIDs {
var r *objectSDK.Range
if withRng {
r = &partRanges[i]
}
child, err := a.getChildObject(ctx, partIDs[i], r, verifyIsChild, buffer)
_, err := a.getChildObject(ctx, partIDs[i], r, verifyIsChild, writer)
if err != nil {
return err
}
if err := writer.WriteChunk(ctx, child.Payload()); err != nil {
return err
}
buffer = child.Payload()
}
return nil
}

1
pkg/services/object/get/get_test.go
View file

@ -629,7 +629,6 @@ func TestGetRemoteSmall(t *testing.T) {
*c1, *c2 = *c2, *c1
w.SetPayloadBuffer(make([]byte, 0))
err = svc.Get(ctx, p)
require.NoError(t, err)
require.Equal(t, obj, w.Object())

24
pkg/services/object/get/writer.go
View file

@ -49,19 +49,9 @@ func NewSimpleObjectWriter() *SimpleObjectWriter {
}
}
func (s *SimpleObjectWriter) SetPayloadBuffer(buffer []byte) {
if buffer != nil {
s.pld = buffer[:0]
}
}
func (s *SimpleObjectWriter) WriteHeader(_ context.Context, obj *objectSDK.Object) error {
s.obj = obj
if s.pld == nil {
s.pld = make([]byte, 0, obj.PayloadSize())
}
return nil
}
@ -90,3 +80,17 @@ func (h *hasherWrapper) WriteChunk(_ context.Context, p []byte) error {
_, err := h.hash.Write(p)
return err
}
type payloadWriter struct {
origin ChunkWriter
obj *objectSDK.Object
}
func (w *payloadWriter) WriteChunk(ctx context.Context, p []byte) error {
return w.origin.WriteChunk(ctx, p)
}
func (w *payloadWriter) WriteHeader(_ context.Context, o *objectSDK.Object) error {
w.obj = o
return nil
}