2020-10-21 15:19:27 +03:00
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package rediscensus
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import (
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"context"
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2021-09-08 16:00:52 +03:00
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"go.opencensus.io/trace"
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2023-01-23 09:48:54 +03:00
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"github.com/redis/go-redis/extra/rediscmd/v9"
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"github.com/redis/go-redis/v9"
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2020-10-21 15:19:27 +03:00
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)
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type TracingHook struct{}
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2021-04-16 15:00:10 +03:00
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var _ redis.Hook = (*TracingHook)(nil)
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func NewTracingHook() *TracingHook {
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return new(TracingHook)
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}
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2020-10-21 15:19:27 +03:00
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func (TracingHook) BeforeProcess(ctx context.Context, cmd redis.Cmder) (context.Context, error) {
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ctx, span := trace.StartSpan(ctx, cmd.FullName())
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span.AddAttributes(trace.StringAttribute("db.system", "redis"),
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trace.StringAttribute("redis.cmd", rediscmd.CmdString(cmd)))
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return ctx, nil
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}
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func (TracingHook) AfterProcess(ctx context.Context, cmd redis.Cmder) error {
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span := trace.FromContext(ctx)
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if err := cmd.Err(); err != nil {
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recordErrorOnOCSpan(ctx, span, err)
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}
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span.End()
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return nil
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}
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func (TracingHook) BeforeProcessPipeline(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
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return ctx, nil
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}
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func (TracingHook) AfterProcessPipeline(ctx context.Context, cmds []redis.Cmder) error {
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return nil
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}
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func recordErrorOnOCSpan(ctx context.Context, span *trace.Span, err error) {
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if err != redis.Nil {
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span.AddAttributes(trace.BoolAttribute("error", true))
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span.Annotate([]trace.Attribute{trace.StringAttribute("Error", "redis error")}, err.Error())
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}
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}
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