Dependencies for the affinity router and the
affinity routing daemon.
Change-Id: Icda72c3594ef7f8f0bc0c33dc03087a4c25529ca
diff --git a/vendor/github.com/coreos/etcd/compactor/revision.go b/vendor/github.com/coreos/etcd/compactor/revision.go
new file mode 100644
index 0000000..927e41c
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/compactor/revision.go
@@ -0,0 +1,115 @@
+// 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 compactor
+
+import (
+ "context"
+ "sync"
+ "time"
+
+ pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
+ "github.com/coreos/etcd/mvcc"
+
+ "github.com/jonboulle/clockwork"
+)
+
+// Revision compacts the log by purging revisions older than
+// the configured reivison number. Compaction happens every 5 minutes.
+type Revision struct {
+ 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(retention int64, rg RevGetter, c Compactable) *Revision {
+ return newRevision(clockwork.NewRealClock(), retention, rg, c)
+}
+
+func newRevision(clock clockwork.Clock, retention int64, rg RevGetter, c Compactable) *Revision {
+ t := &Revision{
+ clock: clock,
+ retention: retention,
+ rg: rg,
+ c: c,
+ }
+ t.ctx, t.cancel = context.WithCancel(context.Background())
+ return t
+}
+
+const revInterval = 5 * time.Minute
+
+// Run runs revision-based compactor.
+func (t *Revision) Run() {
+ prev := int64(0)
+ go func() {
+ for {
+ select {
+ case <-t.ctx.Done():
+ return
+ case <-t.clock.After(revInterval):
+ t.mu.Lock()
+ p := t.paused
+ t.mu.Unlock()
+ if p {
+ continue
+ }
+ }
+
+ rev := t.rg.Rev() - t.retention
+ if rev <= 0 || rev == prev {
+ continue
+ }
+
+ plog.Noticef("Starting auto-compaction at revision %d (retention: %d revisions)", rev, t.retention)
+ _, err := t.c.Compact(t.ctx, &pb.CompactionRequest{Revision: rev})
+ if err == nil || err == mvcc.ErrCompacted {
+ prev = rev
+ plog.Noticef("Finished auto-compaction at revision %d", rev)
+ } else {
+ plog.Noticef("Failed auto-compaction at revision %d (%v)", rev, err)
+ plog.Noticef("Retry after %v", revInterval)
+ }
+ }
+ }()
+}
+
+// Stop stops revision-based compactor.
+func (t *Revision) Stop() {
+ t.cancel()
+}
+
+// Pause pauses revision-based compactor.
+func (t *Revision) Pause() {
+ t.mu.Lock()
+ defer t.mu.Unlock()
+ t.paused = true
+}
+
+// Resume resumes revision-based compactor.
+func (t *Revision) Resume() {
+ t.mu.Lock()
+ defer t.mu.Unlock()
+ t.paused = false
+}