[VOL-2235] Mocks and interfaces for rw-core
This update consists of mocks that are used by the rw-core
during unit testing. It also includes interfaces used for unit
tests.
Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/vendor/go.etcd.io/etcd/etcdserver/api/v2stats/server.go b/vendor/go.etcd.io/etcd/etcdserver/api/v2stats/server.go
new file mode 100644
index 0000000..c4accc7
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/etcdserver/api/v2stats/server.go
@@ -0,0 +1,142 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package v2stats
+
+import (
+ "encoding/json"
+ "log"
+ "sync"
+ "time"
+
+ "go.etcd.io/etcd/raft"
+)
+
+// ServerStats encapsulates various statistics about an EtcdServer and its
+// communication with other members of the cluster
+type ServerStats struct {
+ serverStats
+ sync.Mutex
+}
+
+func NewServerStats(name, id string) *ServerStats {
+ ss := &ServerStats{
+ serverStats: serverStats{
+ Name: name,
+ ID: id,
+ },
+ }
+ now := time.Now()
+ ss.StartTime = now
+ ss.LeaderInfo.StartTime = now
+ ss.sendRateQueue = &statsQueue{back: -1}
+ ss.recvRateQueue = &statsQueue{back: -1}
+ return ss
+}
+
+type serverStats struct {
+ Name string `json:"name"`
+ // ID is the raft ID of the node.
+ // TODO(jonboulle): use ID instead of name?
+ ID string `json:"id"`
+ State raft.StateType `json:"state"`
+ StartTime time.Time `json:"startTime"`
+
+ LeaderInfo struct {
+ Name string `json:"leader"`
+ Uptime string `json:"uptime"`
+ StartTime time.Time `json:"startTime"`
+ } `json:"leaderInfo"`
+
+ RecvAppendRequestCnt uint64 `json:"recvAppendRequestCnt,"`
+ RecvingPkgRate float64 `json:"recvPkgRate,omitempty"`
+ RecvingBandwidthRate float64 `json:"recvBandwidthRate,omitempty"`
+
+ SendAppendRequestCnt uint64 `json:"sendAppendRequestCnt"`
+ SendingPkgRate float64 `json:"sendPkgRate,omitempty"`
+ SendingBandwidthRate float64 `json:"sendBandwidthRate,omitempty"`
+
+ sendRateQueue *statsQueue
+ recvRateQueue *statsQueue
+}
+
+func (ss *ServerStats) JSON() []byte {
+ ss.Lock()
+ stats := ss.serverStats
+ stats.SendingPkgRate, stats.SendingBandwidthRate = stats.sendRateQueue.Rate()
+ stats.RecvingPkgRate, stats.RecvingBandwidthRate = stats.recvRateQueue.Rate()
+ stats.LeaderInfo.Uptime = time.Since(stats.LeaderInfo.StartTime).String()
+ ss.Unlock()
+ b, err := json.Marshal(stats)
+ // TODO(jonboulle): appropriate error handling?
+ if err != nil {
+ log.Printf("stats: error marshalling server stats: %v", err)
+ }
+ return b
+}
+
+// RecvAppendReq updates the ServerStats in response to an AppendRequest
+// from the given leader being received
+func (ss *ServerStats) RecvAppendReq(leader string, reqSize int) {
+ ss.Lock()
+ defer ss.Unlock()
+
+ now := time.Now()
+
+ ss.State = raft.StateFollower
+ if leader != ss.LeaderInfo.Name {
+ ss.LeaderInfo.Name = leader
+ ss.LeaderInfo.StartTime = now
+ }
+
+ ss.recvRateQueue.Insert(
+ &RequestStats{
+ SendingTime: now,
+ Size: reqSize,
+ },
+ )
+ ss.RecvAppendRequestCnt++
+}
+
+// SendAppendReq updates the ServerStats in response to an AppendRequest
+// being sent by this server
+func (ss *ServerStats) SendAppendReq(reqSize int) {
+ ss.Lock()
+ defer ss.Unlock()
+
+ ss.becomeLeader()
+
+ ss.sendRateQueue.Insert(
+ &RequestStats{
+ SendingTime: time.Now(),
+ Size: reqSize,
+ },
+ )
+
+ ss.SendAppendRequestCnt++
+}
+
+func (ss *ServerStats) BecomeLeader() {
+ ss.Lock()
+ defer ss.Unlock()
+ ss.becomeLeader()
+}
+
+func (ss *ServerStats) becomeLeader() {
+ if ss.State != raft.StateLeader {
+ ss.State = raft.StateLeader
+ ss.LeaderInfo.Name = ss.ID
+ ss.LeaderInfo.StartTime = time.Now()
+ }
+}