seaweedfs/weed/pb/filer_pb/filer_client.go
chrislu 9f9ef1340c use streaming mode for long poll grpc calls
streaming mode would create separate grpc connections for each call.
this is to ensure the long poll connections are properly closed.
2021-12-26 00:15:03 -08:00

310 lines
8.4 KiB
Go

package filer_pb
import (
"context"
"errors"
"fmt"
"io"
"math"
"os"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/util"
)
var (
OS_UID = uint32(os.Getuid())
OS_GID = uint32(os.Getgid())
)
type FilerClient interface {
WithFilerClient(streamingMode bool, fn func(SeaweedFilerClient) error) error
AdjustedUrl(location *Location) string
}
func GetEntry(filerClient FilerClient, fullFilePath util.FullPath) (entry *Entry, err error) {
dir, name := fullFilePath.DirAndName()
err = filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
request := &LookupDirectoryEntryRequest{
Directory: dir,
Name: name,
}
// glog.V(3).Infof("read %s request: %v", fullFilePath, request)
resp, err := LookupEntry(client, request)
if err != nil {
glog.V(3).Infof("read %s %v: %v", fullFilePath, resp, err)
return err
}
if resp.Entry == nil {
// glog.V(3).Infof("read %s entry: %v", fullFilePath, entry)
return nil
}
entry = resp.Entry
return nil
})
return
}
type EachEntryFunciton func(entry *Entry, isLast bool) error
func ReadDirAllEntries(filerClient FilerClient, fullDirPath util.FullPath, prefix string, fn EachEntryFunciton) (err error) {
var counter uint32
var startFrom string
var counterFunc = func(entry *Entry, isLast bool) error {
counter++
startFrom = entry.Name
return fn(entry, isLast)
}
var paginationLimit uint32 = 10000
if err = doList(filerClient, fullDirPath, prefix, counterFunc, "", false, paginationLimit); err != nil {
return err
}
for counter == paginationLimit {
counter = 0
if err = doList(filerClient, fullDirPath, prefix, counterFunc, startFrom, false, paginationLimit); err != nil {
return err
}
}
return nil
}
func List(filerClient FilerClient, parentDirectoryPath, prefix string, fn EachEntryFunciton, startFrom string, inclusive bool, limit uint32) (err error) {
return filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
return doSeaweedList(client, util.FullPath(parentDirectoryPath), prefix, fn, startFrom, inclusive, limit)
})
}
func doList(filerClient FilerClient, fullDirPath util.FullPath, prefix string, fn EachEntryFunciton, startFrom string, inclusive bool, limit uint32) (err error) {
return filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
return doSeaweedList(client, fullDirPath, prefix, fn, startFrom, inclusive, limit)
})
}
func SeaweedList(client SeaweedFilerClient, parentDirectoryPath, prefix string, fn EachEntryFunciton, startFrom string, inclusive bool, limit uint32) (err error) {
return doSeaweedList(client, util.FullPath(parentDirectoryPath), prefix, fn, startFrom, inclusive, limit)
}
func doSeaweedList(client SeaweedFilerClient, fullDirPath util.FullPath, prefix string, fn EachEntryFunciton, startFrom string, inclusive bool, limit uint32) (err error) {
// Redundancy limit to make it correctly judge whether it is the last file.
redLimit := limit
if limit < math.MaxInt32 && limit != 0 {
redLimit = limit + 1
}
if redLimit > math.MaxInt32 {
redLimit = math.MaxInt32
}
request := &ListEntriesRequest{
Directory: string(fullDirPath),
Prefix: prefix,
StartFromFileName: startFrom,
Limit: redLimit,
InclusiveStartFrom: inclusive,
}
glog.V(4).Infof("read directory: %v", request)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
stream, err := client.ListEntries(ctx, request)
if err != nil {
return fmt.Errorf("list %s: %v", fullDirPath, err)
}
var prevEntry *Entry
count := 0
for {
resp, recvErr := stream.Recv()
if recvErr != nil {
if recvErr == io.EOF {
if prevEntry != nil {
if err := fn(prevEntry, true); err != nil {
return err
}
}
break
} else {
return recvErr
}
}
if prevEntry != nil {
if err := fn(prevEntry, false); err != nil {
return err
}
}
prevEntry = resp.Entry
count++
if count > int(limit) && limit != 0 {
prevEntry = nil
}
}
return nil
}
func Exists(filerClient FilerClient, parentDirectoryPath string, entryName string, isDirectory bool) (exists bool, err error) {
err = filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
request := &LookupDirectoryEntryRequest{
Directory: parentDirectoryPath,
Name: entryName,
}
glog.V(4).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
resp, err := LookupEntry(client, request)
if err != nil {
if err == ErrNotFound {
exists = false
return nil
}
glog.V(0).Infof("exists entry %v: %v", request, err)
return fmt.Errorf("exists entry %s/%s: %v", parentDirectoryPath, entryName, err)
}
exists = resp.Entry.IsDirectory == isDirectory
return nil
})
return
}
func Touch(filerClient FilerClient, parentDirectoryPath string, entryName string, entry *Entry) (err error) {
return filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
request := &UpdateEntryRequest{
Directory: parentDirectoryPath,
Entry: entry,
}
glog.V(4).Infof("touch entry %v/%v: %v", parentDirectoryPath, entryName, request)
if err := UpdateEntry(client, request); err != nil {
glog.V(0).Infof("touch exists entry %v: %v", request, err)
return fmt.Errorf("touch exists entry %s/%s: %v", parentDirectoryPath, entryName, err)
}
return nil
})
}
func Mkdir(filerClient FilerClient, parentDirectoryPath string, dirName string, fn func(entry *Entry)) error {
return filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
return DoMkdir(client, parentDirectoryPath, dirName, fn)
})
}
func DoMkdir(client SeaweedFilerClient, parentDirectoryPath string, dirName string, fn func(entry *Entry)) error {
entry := &Entry{
Name: dirName,
IsDirectory: true,
Attributes: &FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(0777 | os.ModeDir),
Uid: OS_UID,
Gid: OS_GID,
},
}
if fn != nil {
fn(entry)
}
request := &CreateEntryRequest{
Directory: parentDirectoryPath,
Entry: entry,
}
glog.V(1).Infof("mkdir: %v", request)
if err := CreateEntry(client, request); err != nil {
glog.V(0).Infof("mkdir %v: %v", request, err)
return fmt.Errorf("mkdir %s/%s: %v", parentDirectoryPath, dirName, err)
}
return nil
}
func MkFile(filerClient FilerClient, parentDirectoryPath string, fileName string, chunks []*FileChunk, fn func(entry *Entry)) error {
return filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
entry := &Entry{
Name: fileName,
IsDirectory: false,
Attributes: &FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(0770),
Uid: OS_UID,
Gid: OS_GID,
},
Chunks: chunks,
}
if fn != nil {
fn(entry)
}
request := &CreateEntryRequest{
Directory: parentDirectoryPath,
Entry: entry,
}
glog.V(1).Infof("create file: %s/%s", parentDirectoryPath, fileName)
if err := CreateEntry(client, request); err != nil {
glog.V(0).Infof("create file %v:%v", request, err)
return fmt.Errorf("create file %s/%s: %v", parentDirectoryPath, fileName, err)
}
return nil
})
}
func Remove(filerClient FilerClient, parentDirectoryPath, name string, isDeleteData, isRecursive, ignoreRecursiveErr, isFromOtherCluster bool, signatures []int32) error {
return filerClient.WithFilerClient(false, func(client SeaweedFilerClient) error {
return DoRemove(client, parentDirectoryPath, name, isDeleteData, isRecursive, ignoreRecursiveErr, isFromOtherCluster, signatures)
})
}
func DoRemove(client SeaweedFilerClient, parentDirectoryPath string, name string, isDeleteData bool, isRecursive bool, ignoreRecursiveErr bool, isFromOtherCluster bool, signatures []int32) error {
deleteEntryRequest := &DeleteEntryRequest{
Directory: parentDirectoryPath,
Name: name,
IsDeleteData: isDeleteData,
IsRecursive: isRecursive,
IgnoreRecursiveError: ignoreRecursiveErr,
IsFromOtherCluster: isFromOtherCluster,
Signatures: signatures,
}
if resp, err := client.DeleteEntry(context.Background(), deleteEntryRequest); err != nil {
if strings.Contains(err.Error(), ErrNotFound.Error()) {
return nil
}
return err
} else {
if resp.Error != "" {
if strings.Contains(resp.Error, ErrNotFound.Error()) {
return nil
}
return errors.New(resp.Error)
}
}
return nil
}