1// Copyright 2017 Google LLC
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//      http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package spanner
16
17import (
18	"context"
19
20	"go.opencensus.io/stats"
21	"go.opencensus.io/stats/view"
22)
23
24const statsPrefix = "cloud.google.com/go/spanner/"
25
26func recordStat(ctx context.Context, m *stats.Int64Measure, n int64) {
27	stats.Record(ctx, m.M(n))
28}
29
30var (
31	// OpenSessionCount is a measure of the number of sessions currently opened.
32	// It is EXPERIMENTAL and subject to change or removal without notice.
33	OpenSessionCount = stats.Int64(statsPrefix+"open_session_count", "Number of sessions currently opened",
34		stats.UnitDimensionless)
35
36	// OpenSessionCountView is a view of the last value of OpenSessionCount.
37	// It is EXPERIMENTAL and subject to change or removal without notice.
38	OpenSessionCountView = &view.View{
39		Name:        OpenSessionCount.Name(),
40		Description: OpenSessionCount.Description(),
41		Measure:     OpenSessionCount,
42		Aggregation: view.LastValue(),
43	}
44)
45