mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-09-06 00:50:37 +02:00
161 lines
4.3 KiB
Go
161 lines
4.3 KiB
Go
package topology
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/security"
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"github.com/chrislusf/seaweedfs/weed/storage"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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func ReplicatedWrite(masterNode string, s *storage.Store,
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volumeId storage.VolumeId, needle *storage.Needle,
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r *http.Request) (size uint32, errorStatus string) {
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//check JWT
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jwt := security.GetJwt(r)
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ret, err := s.Write(volumeId, needle)
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needToReplicate := !s.HasVolume(volumeId)
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if err != nil {
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errorStatus = "Failed to write to local disk (" + err.Error() + ")"
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} else {
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needToReplicate = needToReplicate || s.GetVolume(volumeId).NeedToReplicate()
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}
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if !needToReplicate {
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needToReplicate = s.GetVolume(volumeId).NeedToReplicate()
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}
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if needToReplicate { //send to other replica locations
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if r.FormValue("type") != "replicate" {
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if err = distributedOperation(masterNode, s, volumeId, func(location operation.Location) error {
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u := url.URL{
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Scheme: "http",
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Host: location.Url,
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Path: r.URL.Path,
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}
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q := url.Values{
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"type": {"replicate"},
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}
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if needle.LastModified > 0 {
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q.Set("ts", strconv.FormatUint(needle.LastModified, 10))
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}
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if needle.IsChunkedManifest() {
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q.Set("cm", "true")
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}
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u.RawQuery = q.Encode()
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pairMap := make(map[string]string)
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if needle.HasPairs() {
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tmpMap := make(map[string]string)
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err := json.Unmarshal(needle.Pairs, &tmpMap)
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if err != nil {
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glog.V(0).Infoln("Unmarshal pairs error:", err)
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}
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for k, v := range tmpMap {
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pairMap[storage.PairNamePrefix+k] = v
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}
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}
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_, err := operation.Upload(u.String(),
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string(needle.Name), bytes.NewReader(needle.Data), needle.IsGzipped(), string(needle.Mime),
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pairMap, jwt)
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return err
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}); err != nil {
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ret = 0
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errorStatus = fmt.Sprintf("Failed to write to replicas for volume %d: %v", volumeId, err)
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}
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}
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}
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size = ret
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return
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}
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func ReplicatedDelete(masterNode string, store *storage.Store,
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volumeId storage.VolumeId, n *storage.Needle,
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r *http.Request) (uint32, error) {
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//check JWT
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jwt := security.GetJwt(r)
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ret, err := store.Delete(volumeId, n)
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if err != nil {
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glog.V(0).Infoln("delete error:", err)
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return ret, err
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}
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needToReplicate := !store.HasVolume(volumeId)
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if !needToReplicate && ret > 0 {
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needToReplicate = store.GetVolume(volumeId).NeedToReplicate()
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}
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if needToReplicate { //send to other replica locations
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if r.FormValue("type") != "replicate" {
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if err = distributedOperation(masterNode, store, volumeId, func(location operation.Location) error {
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return util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate", jwt)
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}); err != nil {
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ret = 0
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}
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}
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}
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return ret, err
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}
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type DistributedOperationResult map[string]error
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func (dr DistributedOperationResult) Error() error {
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var errs []string
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for k, v := range dr {
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if v != nil {
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errs = append(errs, fmt.Sprintf("[%s]: %v", k, v))
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}
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}
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if len(errs) == 0 {
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return nil
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}
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return errors.New(strings.Join(errs, "\n"))
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}
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type RemoteResult struct {
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Host string
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Error error
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}
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func distributedOperation(masterNode string, store *storage.Store, volumeId storage.VolumeId, op func(location operation.Location) error) error {
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if lookupResult, lookupErr := operation.Lookup(masterNode, volumeId.String()); lookupErr == nil {
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length := 0
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selfUrl := (store.Ip + ":" + strconv.Itoa(store.Port))
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results := make(chan RemoteResult)
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for _, location := range lookupResult.Locations {
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if location.Url != selfUrl {
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length++
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go func(location operation.Location, results chan RemoteResult) {
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results <- RemoteResult{location.Url, op(location)}
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}(location, results)
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}
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}
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ret := DistributedOperationResult(make(map[string]error))
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for i := 0; i < length; i++ {
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result := <-results
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ret[result.Host] = result.Error
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}
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if volume := store.GetVolume(volumeId); volume != nil {
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if length+1 < volume.ReplicaPlacement.GetCopyCount() {
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return fmt.Errorf("replicating opetations [%d] is less than volume's replication copy count [%d]", length+1, volume.ReplicaPlacement.GetCopyCount())
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}
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}
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return ret.Error()
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} else {
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glog.V(0).Infoln()
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return fmt.Errorf("Failed to lookup for %d: %v", volumeId, lookupErr)
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}
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}
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