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store and retrieve processState atomically

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This commit is contained in:
tsmethurst 2022-02-08 13:38:44 +01:00
parent dba9ad4348
commit 8c0141d103
3 changed files with 32 additions and 30 deletions
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23
internal/media/processingemoji.go
View file

@ -25,6 +25,7 @@ import (
"io"
"strings"
"sync"
"sync/atomic"
"time"
"codeberg.org/gruf/go-store/kv"
@ -53,9 +54,7 @@ type ProcessingEmoji struct {
/*
below fields represent the processing state of the static of the emoji
*/
staticState processState
fullSizeState processState
staticState int32
/*
below pointers to database and storage are maintained so that
@ -104,17 +103,18 @@ func (p *ProcessingEmoji) LoadEmoji(ctx context.Context) (*gtsmodel.Emoji, error
// Finished returns true if processing has finished for both the thumbnail
// and full fized version of this piece of media.
func (p *ProcessingEmoji) Finished() bool {
return p.staticState == complete && p.fullSizeState == complete
return atomic.LoadInt32(&p.staticState) == int32(complete)
}
func (p *ProcessingEmoji) loadStatic(ctx context.Context) error {
switch p.staticState {
staticState := atomic.LoadInt32(&p.staticState)
switch processState(staticState) {
case received:
// stream the original file out of storage...
stored, err := p.storage.GetStream(p.emoji.ImagePath)
if err != nil {
p.err = fmt.Errorf("loadStatic: error fetching file from storage: %s", err)
p.staticState = errored
atomic.StoreInt32(&p.staticState, int32(errored))
return p.err
}
@ -122,27 +122,27 @@ func (p *ProcessingEmoji) loadStatic(ctx context.Context) error {
static, err := deriveStaticEmoji(stored, p.emoji.ImageContentType)
if err != nil {
p.err = fmt.Errorf("loadStatic: error deriving static: %s", err)
p.staticState = errored
atomic.StoreInt32(&p.staticState, int32(errored))
return p.err
}
if err := stored.Close(); err != nil {
p.err = fmt.Errorf("loadStatic: error closing stored full size: %s", err)
p.staticState = errored
atomic.StoreInt32(&p.staticState, int32(errored))
return p.err
}
// put the static in storage
if err := p.storage.Put(p.emoji.ImageStaticPath, static.small); err != nil {
p.err = fmt.Errorf("loadStatic: error storing static: %s", err)
p.staticState = errored
atomic.StoreInt32(&p.staticState, int32(errored))
return p.err
}
p.emoji.ImageStaticFileSize = len(static.small)
// we're done processing the static version of the emoji!
p.staticState = complete
atomic.StoreInt32(&p.staticState, int32(complete))
fallthrough
case complete:
return nil
@ -281,8 +281,7 @@ func (m *manager) preProcessEmoji(ctx context.Context, data DataFunc, shortcode
instanceAccountID: instanceAccount.ID,
emoji: emoji,
data: data,
staticState: received,
fullSizeState: received,
staticState: int32(received),
database: m.db,
storage: m.storage,
}

37
internal/media/processingmedia.go
View file

@ -25,6 +25,7 @@ import (
"io"
"strings"
"sync"
"sync/atomic"
"time"
"codeberg.org/gruf/go-store/kv"
@ -49,8 +50,8 @@ type ProcessingMedia struct {
data DataFunc
read bool // bool indicating that data function has been triggered already
thumbstate processState // the processing state of the media thumbnail
fullSizeState processState // the processing state of the full-sized media
thumbState int32 // the processing state of the media thumbnail
fullSizeState int32 // the processing state of the full-sized media
/*
below pointers to database and storage are maintained so that
@ -103,11 +104,12 @@ func (p *ProcessingMedia) LoadAttachment(ctx context.Context) (*gtsmodel.MediaAt
// Finished returns true if processing has finished for both the thumbnail
// and full fized version of this piece of media.
func (p *ProcessingMedia) Finished() bool {
return p.thumbstate == complete && p.fullSizeState == complete
return atomic.LoadInt32(&p.thumbState) == int32(complete) && atomic.LoadInt32(&p.fullSizeState) == int32(complete)
}
func (p *ProcessingMedia) loadThumb(ctx context.Context) error {
switch p.thumbstate {
thumbState := atomic.LoadInt32(&p.thumbState)
switch processState(thumbState) {
case received:
// we haven't processed a thumbnail for this media yet so do it now
@ -122,7 +124,7 @@ func (p *ProcessingMedia) loadThumb(ctx context.Context) error {
stored, err := p.storage.GetStream(p.attachment.File.Path)
if err != nil {
p.err = fmt.Errorf("loadThumb: error fetching file from storage: %s", err)
p.thumbstate = errored
atomic.StoreInt32(&p.thumbState, int32(errored))
return p.err
}
@ -130,20 +132,20 @@ func (p *ProcessingMedia) loadThumb(ctx context.Context) error {
thumb, err := deriveThumbnail(stored, p.attachment.File.ContentType, createBlurhash)
if err != nil {
p.err = fmt.Errorf("loadThumb: error deriving thumbnail: %s", err)
p.thumbstate = errored
atomic.StoreInt32(&p.thumbState, int32(errored))
return p.err
}
if err := stored.Close(); err != nil {
p.err = fmt.Errorf("loadThumb: error closing stored full size: %s", err)
p.thumbstate = errored
atomic.StoreInt32(&p.thumbState, int32(errored))
return p.err
}
// put the thumbnail in storage
if err := p.storage.Put(p.attachment.Thumbnail.Path, thumb.small); err != nil {
p.err = fmt.Errorf("loadThumb: error storing thumbnail: %s", err)
p.thumbstate = errored
atomic.StoreInt32(&p.thumbState, int32(errored))
return p.err
}
@ -160,7 +162,7 @@ func (p *ProcessingMedia) loadThumb(ctx context.Context) error {
p.attachment.Thumbnail.FileSize = len(thumb.small)
// we're done processing the thumbnail!
p.thumbstate = complete
atomic.StoreInt32(&p.thumbState, int32(complete))
fallthrough
case complete:
return nil
@ -168,11 +170,12 @@ func (p *ProcessingMedia) loadThumb(ctx context.Context) error {
return p.err
}
return fmt.Errorf("loadThumb: thumbnail processing status %d unknown", p.thumbstate)
return fmt.Errorf("loadThumb: thumbnail processing status %d unknown", p.thumbState)
}
func (p *ProcessingMedia) loadFullSize(ctx context.Context) error {
switch p.fullSizeState {
fullSizeState := atomic.LoadInt32(&p.fullSizeState)
switch processState(fullSizeState) {
case received:
var err error
var decoded *imageMeta
@ -181,7 +184,7 @@ func (p *ProcessingMedia) loadFullSize(ctx context.Context) error {
stored, err := p.storage.GetStream(p.attachment.File.Path)
if err != nil {
p.err = fmt.Errorf("loadFullSize: error fetching file from storage: %s", err)
p.fullSizeState = errored
atomic.StoreInt32(&p.fullSizeState, int32(errored))
return p.err
}
@ -198,13 +201,13 @@ func (p *ProcessingMedia) loadFullSize(ctx context.Context) error {
if err != nil {
p.err = err
p.fullSizeState = errored
atomic.StoreInt32(&p.fullSizeState, int32(errored))
return p.err
}
if err := stored.Close(); err != nil {
p.err = fmt.Errorf("loadFullSize: error closing stored full size: %s", err)
p.thumbstate = errored
atomic.StoreInt32(&p.fullSizeState, int32(errored))
return p.err
}
@ -219,7 +222,7 @@ func (p *ProcessingMedia) loadFullSize(ctx context.Context) error {
p.attachment.Processing = gtsmodel.ProcessingStatusProcessed
// we're done processing the full-size image
p.fullSizeState = complete
atomic.StoreInt32(&p.fullSizeState, int32(complete))
fallthrough
case complete:
return nil
@ -400,8 +403,8 @@ func (m *manager) preProcessMedia(ctx context.Context, data DataFunc, accountID
processingMedia := &ProcessingMedia{
attachment: attachment,
data: data,
thumbstate: received,
fullSizeState: received,
thumbState: int32(received),
fullSizeState: int32(received),
database: m.db,
storage: m.storage,
}

2
internal/media/types.go
View file

@ -45,7 +45,7 @@ const (
mimeImagePng = mimeImage + "/" + mimePng
)
type processState int
type processState int32
const (
received processState = iota // processing order has been received but not done yet