seaweedfs/weed/operation/delete_content.go

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package operation
import (
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"context"
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"errors"
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"fmt"
"net/http"
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"strings"
"sync"
"google.golang.org/grpc"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
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)
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type DeleteResult struct {
Fid string `json:"fid"`
Size int `json:"size"`
Status int `json:"status"`
Error string `json:"error,omitempty"`
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}
func ParseFileId(fid string) (vid string, key_cookie string, err error) {
commaIndex := strings.Index(fid, ",")
if commaIndex <= 0 {
return "", "", errors.New("Wrong fid format.")
}
return fid[:commaIndex], fid[commaIndex+1:], nil
}
// DeleteFiles batch deletes a list of fileIds
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func DeleteFiles(master string, grpcDialOption grpc.DialOption, fileIds []string) ([]*volume_server_pb.DeleteResult, error) {
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lookupFunc := func(vids []string) (map[string]LookupResult, error) {
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return LookupVolumeIds(master, grpcDialOption, vids)
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}
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return DeleteFilesWithLookupVolumeId(grpcDialOption, fileIds, lookupFunc)
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}
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func DeleteFilesWithLookupVolumeId(grpcDialOption grpc.DialOption, fileIds []string, lookupFunc func(vid []string) (map[string]LookupResult, error)) ([]*volume_server_pb.DeleteResult, error) {
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var ret []*volume_server_pb.DeleteResult
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vid_to_fileIds := make(map[string][]string)
var vids []string
for _, fileId := range fileIds {
vid, _, err := ParseFileId(fileId)
if err != nil {
ret = append(ret, &volume_server_pb.DeleteResult{
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FileId: fileId,
Status: http.StatusBadRequest,
Error: err.Error()},
)
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continue
}
if _, ok := vid_to_fileIds[vid]; !ok {
vid_to_fileIds[vid] = make([]string, 0)
vids = append(vids, vid)
}
vid_to_fileIds[vid] = append(vid_to_fileIds[vid], fileId)
}
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lookupResults, err := lookupFunc(vids)
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if err != nil {
return ret, err
}
server_to_fileIds := make(map[string][]string)
for vid, result := range lookupResults {
if result.Error != "" {
ret = append(ret, &volume_server_pb.DeleteResult{
FileId: vid,
Status: http.StatusBadRequest,
Error: err.Error()},
)
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continue
}
for _, location := range result.Locations {
if _, ok := server_to_fileIds[location.Url]; !ok {
server_to_fileIds[location.Url] = make([]string, 0)
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}
server_to_fileIds[location.Url] = append(
server_to_fileIds[location.Url], vid_to_fileIds[vid]...)
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}
}
resultChan := make(chan []*volume_server_pb.DeleteResult, len(server_to_fileIds))
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var wg sync.WaitGroup
for server, fidList := range server_to_fileIds {
wg.Add(1)
go func(server string, fidList []string) {
defer wg.Done()
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if deleteResults, deleteErr := DeleteFilesAtOneVolumeServer(server, grpcDialOption, fidList); deleteErr != nil {
err = deleteErr
} else if deleteResults != nil {
resultChan <- deleteResults
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}
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}(server, fidList)
}
wg.Wait()
close(resultChan)
for result := range resultChan {
ret = append(ret, result...)
}
return ret, err
}
// DeleteFilesAtOneVolumeServer deletes a list of files that is on one volume server via gRpc
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func DeleteFilesAtOneVolumeServer(volumeServer string, grpcDialOption grpc.DialOption, fileIds []string) (ret []*volume_server_pb.DeleteResult, err error) {
err = WithVolumeServerClient(volumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
req := &volume_server_pb.BatchDeleteRequest{
FileIds: fileIds,
}
resp, err := volumeServerClient.BatchDelete(context.Background(), req)
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// fmt.Printf("deleted %v %v: %v\n", fileIds, err, resp)
if err != nil {
return err
}
ret = append(ret, resp.Results...)
return nil
})
if err != nil {
return
}
for _, result := range ret {
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if result.Error != "" && result.Error != "not found" {
return nil, fmt.Errorf("delete fileId %s: %v", result.FileId, result.Error)
}
}
return
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}