84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// Copyright 2017 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build go1.8
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package spanner
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import (
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"fmt"
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"go.opencensus.io/stats"
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"go.opencensus.io/stats/view"
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"go.opencensus.io/trace"
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"golang.org/x/net/context"
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)
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func traceStartSpan(ctx context.Context, name string) context.Context {
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ctx, _ = trace.StartSpan(ctx, name)
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return ctx
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}
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func traceEndSpan(ctx context.Context, err error) {
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span := trace.FromContext(ctx)
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if err != nil {
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// TODO(jba): Add error code to the status.
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span.SetStatus(trace.Status{Message: err.Error()})
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}
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span.End()
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}
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func tracePrintf(ctx context.Context, attrMap map[string]interface{}, format string, args ...interface{}) {
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var attrs []trace.Attribute
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for k, v := range attrMap {
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var a trace.Attribute
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switch v := v.(type) {
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case string:
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a = trace.StringAttribute(k, v)
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case bool:
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a = trace.BoolAttribute(k, v)
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case int:
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a = trace.Int64Attribute(k, int64(v))
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case int64:
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a = trace.Int64Attribute(k, v)
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default:
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a = trace.StringAttribute(k, fmt.Sprintf("%#v", v))
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}
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attrs = append(attrs, a)
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}
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trace.FromContext(ctx).Annotatef(attrs, format, args...)
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}
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const statsPrefix = "cloud.google.com/go/spanner/"
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func recordStat(ctx context.Context, m *stats.Int64Measure, n int64) {
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stats.Record(ctx, m.M(n))
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}
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var (
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// OpenSessionCount is a measure of the number of sessions currently opened.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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OpenSessionCount = stats.Int64(statsPrefix+"open_session_count", "Number of sessions currently opened",
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stats.UnitDimensionless)
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// OpenSessionCountView is a view of the last value of OpenSessionCount.
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// It is EXPERIMENTAL and subject to change or removal without notice.
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OpenSessionCountView = &view.View{
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Name: OpenSessionCount.Name(),
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Description: OpenSessionCount.Description(),
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Measure: OpenSessionCount,
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Aggregation: view.LastValue(),
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}
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)
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