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Avoid data-transfer in distributed locking (#8004)

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This commit is contained in:
Harshavardhana
2019-08-05 11:45:30 -07:00
committed by kannappanr
parent 843f481eb3
commit b52b90412b
4 changed files with 67 additions and 154 deletions
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34
cmd/lock-rest-client.go
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@@ -17,10 +17,8 @@
package cmd
import (
"bytes"
"context"
"crypto/tls"
"encoding/gob"
"errors"
"io"
"sync"
@@ -131,32 +129,16 @@ func (client *lockRESTClient) Close() error {
// restCall makes a call to the lock REST server.
func (client *lockRESTClient) restCall(call string, args dsync.LockArgs) (reply bool, err error) {
values := url.Values{}
values.Set(lockRESTUID, args.UID)
values.Set(lockRESTSource, args.Source)
values.Set(lockRESTResource, args.Resource)
values.Set(lockRESTServerAddr, args.ServerAddr)
values.Set(lockRESTServerEndpoint, args.ServiceEndpoint)
reader := bytes.NewBuffer(make([]byte, 0, 2048))
err = gob.NewEncoder(reader).Encode(args)
if err != nil {
return false, err
}
respBody, err := client.call(call, nil, reader, -1)
if err != nil {
return false, err
}
var resp lockResponse
respBody, err := client.call(call, values, nil, -1)
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&resp)
if err != nil || !resp.Success {
reqInfo := &logger.ReqInfo{}
reqInfo.AppendTags("resource", args.Resource)
reqInfo.AppendTags("serveraddress", args.ServerAddr)
reqInfo.AppendTags("serviceendpoint", args.ServiceEndpoint)
reqInfo.AppendTags("source", args.Source)
reqInfo.AppendTags("uid", args.UID)
ctx := logger.SetReqInfo(context.Background(), reqInfo)
logger.LogIf(ctx, err)
}
return resp.Success, err
return err == nil, err
}
// RLock calls read lock REST API.