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