*: use new adt.IntervalTree interface

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>

auth/range_perm_cache.go

@@ -27,8 +27,8 @@ func getMergedPerms(tx backend.BatchTx, userName string) *unifiedRangePermission
 		return nil
 	}
 
-	readPerms := &adt.IntervalTree{}
-	writePerms := &adt.IntervalTree{}
+	readPerms := adt.NewIntervalTree()
+	writePerms := adt.NewIntervalTree()
 
 	for _, roleName := range user.Roles {
 		role := getRole(tx, roleName)
@@ -128,6 +128,6 @@ func (as *authStore) invalidateCachedPerm(userName string) {
 }
 
 type unifiedRangePermissions struct {
-	readPerms  *adt.IntervalTree
-	writePerms *adt.IntervalTree
+	readPerms  adt.IntervalTree
+	writePerms adt.IntervalTree
 }

auth/range_perm_cache_test.go

@@ -46,7 +46,7 @@ func TestRangePermission(t *testing.T) {
 	}
 
 	for i, tt := range tests {
-		readPerms := &adt.IntervalTree{}
+		readPerms := adt.NewIntervalTree()
 		for _, p := range tt.perms {
 			readPerms.Insert(p, struct{}{})
 		}

etcdserver/api/v3rpc/key.go

@@ -179,7 +179,7 @@ func checkTxnRequest(r *pb.TxnRequest, maxTxnOps int) error {
 // there is an overlap, returns an error. If no overlap, return put and delete
 // sets for recursive evaluation.
 func checkIntervals(reqs []*pb.RequestOp) (map[string]struct{}, adt.IntervalTree, error) {
-	var dels adt.IntervalTree
+	dels := adt.NewIntervalTree()
 
 	// collect deletes from this level; build first to check lower level overlapped puts
 	for _, req := range reqs {

mvcc/watcher_group.go

@@ -156,6 +156,7 @@ type watcherGroup struct {
 func newWatcherGroup() watcherGroup {
 	return watcherGroup{
 		keyWatchers: make(watcherSetByKey),
+		ranges:      adt.NewIntervalTree(),
 		watchers:    make(watcherSet),
 	}
 }

proxy/grpcproxy/cache/store.go

@@ -53,6 +53,7 @@ func keyFunc(req *pb.RangeRequest) string {
 func NewCache(maxCacheEntries int) Cache {
 	return &cache{
 		lru:          lru.New(maxCacheEntries),
+		cachedRanges: adt.NewIntervalTree(),
 		compactedRev: -1,
 	}
 }