Implement bucket expansion (#8509)

pkg/dsync/dsync.go

@@ -16,45 +16,9 @@
 
 package dsync
 
-import (
-	"errors"
-	"math"
-)
-
 // Dsync represents dsync client object which is initialized with
 // authenticated clients, used to initiate lock REST calls.
 type Dsync struct {
-	// Number of nodes participating in the distributed locking.
-	dNodeCount int
-
 	// List of rest client objects, one per lock server.
-	restClnts []NetLocker
-
-	// Simple majority based quorum, set to dNodeCount/2+1
-	dquorum int
-
-	// Simple quorum for read operations, set to dNodeCount/2
-	dquorumReads int
-}
-
-// New - initializes a new dsync object with input restClnts.
-func New(restClnts []NetLocker) (*Dsync, error) {
-	if len(restClnts) < 2 {
-		return nil, errors.New("Dsync is not designed for less than 2 nodes")
-	} else if len(restClnts) > 32 {
-		return nil, errors.New("Dsync is not designed for more than 32 nodes")
-	}
-
-	ds := &Dsync{}
-	ds.dNodeCount = len(restClnts)
-
-	// With odd number of nodes, write and read quorum is basically the same
-	ds.dquorum = int(ds.dNodeCount/2) + 1
-	ds.dquorumReads = int(math.Ceil(float64(ds.dNodeCount) / 2.0))
-
-	// Initialize node name and rest path for each NetLocker object.
-	ds.restClnts = make([]NetLocker, ds.dNodeCount)
-	copy(ds.restClnts, restClnts)
-
-	return ds, nil
+	GetLockersFn func() []NetLocker
 }