Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

index/upsidedown/store/metrics/stats.go

@@ -0,0 +1,50 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// 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 metrics
+
+import (
+	"github.com/blevesearch/bleve/v2/util"
+	store "github.com/blevesearch/upsidedown_store_api"
+)
+
+type stats struct {
+	s *Store
+}
+
+func (s *stats) statsMap() map[string]interface{} {
+	ms := map[string]interface{}{}
+
+	ms["metrics"] = map[string]interface{}{
+		"reader_get":             TimerMap(s.s.timerReaderGet),
+		"reader_multi_get":       TimerMap(s.s.timerReaderMultiGet),
+		"reader_prefix_iterator": TimerMap(s.s.timerReaderPrefixIterator),
+		"reader_range_iterator":  TimerMap(s.s.timerReaderRangeIterator),
+		"writer_execute_batch":   TimerMap(s.s.timerWriterExecuteBatch),
+		"iterator_seek":          TimerMap(s.s.timerIteratorSeek),
+		"iterator_next":          TimerMap(s.s.timerIteratorNext),
+		"batch_merge":            TimerMap(s.s.timerBatchMerge),
+	}
+
+	if o, ok := s.s.o.(store.KVStoreStats); ok {
+		ms["kv"] = o.StatsMap()
+	}
+
+	return ms
+}
+
+func (s *stats) MarshalJSON() ([]byte, error) {
+	m := s.statsMap()
+	return util.MarshalJSON(m)
+}