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package filesys
import (
"fmt"
"bytes"
"time"
"context"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/glog"
)
type ContinuousDirtyPages struct {
hasData bool
Offset int64
Size int64
Data []byte
f *File
}
func newDirtyPages(file *File) *ContinuousDirtyPages {
return &ContinuousDirtyPages{
Data: make([]byte, file.wfs.chunkSizeLimit),
f: file,
}
}
func (pages *ContinuousDirtyPages) AddPage(ctx context.Context, offset int64, data []byte) (chunks []*filer_pb.FileChunk, err error) {
var chunk *filer_pb.FileChunk
if len(data) > len(pages.Data) {
// this is more than what buffer can hold.
// flush existing
if chunk, err = pages.saveExistingPagesToStorage(ctx); err == nil {
if chunk != nil {
glog.V(4).Infof("%s/%s flush existing [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
}
chunks = append(chunks, chunk)
} else {
glog.V(0).Infof("%s/%s failed to flush1 [%d,%d): %v", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size), err)
return
}
pages.Size = 0
// flush the big page
if chunk, err = pages.saveToStorage(ctx, data, offset); err == nil {
if chunk != nil {
glog.V(4).Infof("%s/%s flush big request [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
chunks = append(chunks, chunk)
}
} else {
glog.V(0).Infof("%s/%s failed to flush2 [%d,%d): %v", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size), err)
return
}
return
}
if offset < pages.Offset || offset >= pages.Offset+int64(len(pages.Data)) ||
pages.Offset+int64(len(pages.Data)) < offset+int64(len(data)) {
// if the data is out of range,
// or buffer is full if adding new data,
// flush current buffer and add new data
// println("offset", offset, "size", len(data), "existing offset", pages.Offset, "size", pages.Size)
if chunk, err = pages.saveExistingPagesToStorage(ctx); err == nil {
if chunk != nil {
glog.V(4).Infof("%s/%s add save [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
chunks = append(chunks, chunk)
}
} else {
glog.V(0).Infof("%s/%s add save [%d,%d): %v", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size), err)
return
}
pages.Offset = offset
pages.Size = int64(len(data))
copy(pages.Data, data)
return
}
copy(pages.Data[offset-pages.Offset:], data)
pages.Size = max(pages.Size, offset+int64(len(data))-pages.Offset)
return
}
func (pages *ContinuousDirtyPages) FlushToStorage(ctx context.Context) (chunk *filer_pb.FileChunk, err error) {
if pages.Size == 0 {
return nil, nil
}
if chunk, err = pages.saveExistingPagesToStorage(ctx); err == nil {
pages.Size = 0
if chunk != nil {
glog.V(4).Infof("%s/%s flush [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
}
}
return
}
func (pages *ContinuousDirtyPages) saveExistingPagesToStorage(ctx context.Context) (*filer_pb.FileChunk, error) {
return pages.saveToStorage(ctx, pages.Data[:pages.Size], pages.Offset)
}
func (pages *ContinuousDirtyPages) saveToStorage(ctx context.Context, buf []byte, offset int64) (*filer_pb.FileChunk, error) {
if pages.Size == 0 {
return nil, nil
}
var fileId, host string
if err := pages.f.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.AssignVolumeRequest{
Count: 1,
Replication: pages.f.wfs.replication,
Collection: pages.f.wfs.collection,
TtlSec: pages.f.wfs.ttlSec,
}
resp, err := client.AssignVolume(ctx, request)
if err != nil {
glog.V(0).Infof("assign volume failure %v: %v", request, err)
return err
}
fileId, host = resp.FileId, resp.Url
return nil
}); err != nil {
return nil, fmt.Errorf("filerGrpcAddress assign volume: %v", err)
}
fileUrl := fmt.Sprintf("http://%s/%s", host, fileId)
bufReader := bytes.NewReader(pages.Data[:pages.Size])
uploadResult, err := operation.Upload(fileUrl, pages.f.Name, bufReader, false, "application/octet-stream", nil, "")
if err != nil {
glog.V(0).Infof("upload data %v to %s: %v", pages.f.Name, fileUrl, err)
return nil, fmt.Errorf("upload data: %v", err)
}
if uploadResult.Error != "" {
glog.V(0).Infof("upload failure %v to %s: %v", pages.f.Name, fileUrl, err)
return nil, fmt.Errorf("upload result: %v", uploadResult.Error)
}
return &filer_pb.FileChunk{
FileId: fileId,
Offset: offset,
Size: uint64(len(buf)),
Mtime: time.Now().UnixNano(),
}, nil
}
func max(x, y int64) int64 {
if x > y {
return x
}
return y
}
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