[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/v3compactor/revision.go b/vendor/go.etcd.io/etcd/etcdserver/api/v3compactor/revision.go
new file mode 100644
index 0000000..cf8ac43
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/etcdserver/api/v3compactor/revision.go
@@ -0,0 +1,143 @@
+// Copyright 2017 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 v3compactor
+
+import (
+ "context"
+ "sync"
+ "time"
+
+ pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
+ "go.etcd.io/etcd/mvcc"
+
+ "github.com/jonboulle/clockwork"
+ "go.uber.org/zap"
+)
+
+// Revision compacts the log by purging revisions older than
+// the configured reivison number. Compaction happens every 5 minutes.
+type Revision struct {
+ lg *zap.Logger
+
+ clock clockwork.Clock
+ retention int64
+
+ rg RevGetter
+ c Compactable
+
+ ctx context.Context
+ cancel context.CancelFunc
+
+ mu sync.Mutex
+ paused bool
+}
+
+// newRevision creates a new instance of Revisonal compactor that purges
+// the log older than retention revisions from the current revision.
+func newRevision(lg *zap.Logger, clock clockwork.Clock, retention int64, rg RevGetter, c Compactable) *Revision {
+ rc := &Revision{
+ lg: lg,
+ clock: clock,
+ retention: retention,
+ rg: rg,
+ c: c,
+ }
+ rc.ctx, rc.cancel = context.WithCancel(context.Background())
+ return rc
+}
+
+const revInterval = 5 * time.Minute
+
+// Run runs revision-based compactor.
+func (rc *Revision) Run() {
+ prev := int64(0)
+ go func() {
+ for {
+ select {
+ case <-rc.ctx.Done():
+ return
+ case <-rc.clock.After(revInterval):
+ rc.mu.Lock()
+ p := rc.paused
+ rc.mu.Unlock()
+ if p {
+ continue
+ }
+ }
+
+ rev := rc.rg.Rev() - rc.retention
+ if rev <= 0 || rev == prev {
+ continue
+ }
+
+ now := time.Now()
+ if rc.lg != nil {
+ rc.lg.Info(
+ "starting auto revision compaction",
+ zap.Int64("revision", rev),
+ zap.Int64("revision-compaction-retention", rc.retention),
+ )
+ } else {
+ plog.Noticef("Starting auto-compaction at revision %d (retention: %d revisions)", rev, rc.retention)
+ }
+ _, err := rc.c.Compact(rc.ctx, &pb.CompactionRequest{Revision: rev})
+ if err == nil || err == mvcc.ErrCompacted {
+ prev = rev
+ if rc.lg != nil {
+ rc.lg.Info(
+ "completed auto revision compaction",
+ zap.Int64("revision", rev),
+ zap.Int64("revision-compaction-retention", rc.retention),
+ zap.Duration("took", time.Since(now)),
+ )
+ } else {
+ plog.Noticef("Finished auto-compaction at revision %d", rev)
+ }
+ } else {
+ if rc.lg != nil {
+ rc.lg.Warn(
+ "failed auto revision compaction",
+ zap.Int64("revision", rev),
+ zap.Int64("revision-compaction-retention", rc.retention),
+ zap.Duration("retry-interval", revInterval),
+ zap.Error(err),
+ )
+ } else {
+ plog.Noticef("Failed auto-compaction at revision %d (%v)", rev, err)
+ plog.Noticef("Retry after %v", revInterval)
+ }
+ }
+ }
+ }()
+}
+
+// Stop stops revision-based compactor.
+func (rc *Revision) Stop() {
+ rc.cancel()
+}
+
+// Pause pauses revision-based compactor.
+func (rc *Revision) Pause() {
+ rc.mu.Lock()
+ rc.paused = true
+ rc.mu.Unlock()
+}
+
+// Resume resumes revision-based compactor.
+func (rc *Revision) Resume() {
+ rc.mu.Lock()
+ rc.paused = false
+ rc.mu.Unlock()
+}