mirror of https://github.com/go-redis/redis.git
121 lines
2.5 KiB
Go
121 lines
2.5 KiB
Go
package redisext
|
|
|
|
import (
|
|
"context"
|
|
"strings"
|
|
|
|
"github.com/go-redis/redis/v8"
|
|
"github.com/go-redis/redis/v8/internal"
|
|
"go.opentelemetry.io/otel/api/global"
|
|
"go.opentelemetry.io/otel/api/trace"
|
|
"go.opentelemetry.io/otel/label"
|
|
)
|
|
|
|
type OpenTelemetryHook struct{}
|
|
|
|
var _ redis.Hook = OpenTelemetryHook{}
|
|
|
|
func (OpenTelemetryHook) BeforeProcess(ctx context.Context, cmd redis.Cmder) (context.Context, error) {
|
|
if !trace.SpanFromContext(ctx).IsRecording() {
|
|
return ctx, nil
|
|
}
|
|
|
|
b := make([]byte, 32)
|
|
b = appendCmd(b, cmd)
|
|
|
|
tracer := global.Tracer("github.com/go-redis/redis")
|
|
ctx, span := tracer.Start(ctx, cmd.FullName())
|
|
span.SetAttributes(
|
|
label.String("db.system", "redis"),
|
|
label.String("redis.cmd", internal.String(b)),
|
|
)
|
|
|
|
return ctx, nil
|
|
}
|
|
|
|
func (OpenTelemetryHook) AfterProcess(ctx context.Context, cmd redis.Cmder) error {
|
|
span := trace.SpanFromContext(ctx)
|
|
if err := cmd.Err(); err != nil {
|
|
_ = internal.RecordError(ctx, err)
|
|
}
|
|
span.End()
|
|
return nil
|
|
}
|
|
|
|
func (OpenTelemetryHook) BeforeProcessPipeline(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
|
|
if !trace.SpanFromContext(ctx).IsRecording() {
|
|
return ctx, nil
|
|
}
|
|
|
|
const numCmdLimit = 100
|
|
const numNameLimit = 10
|
|
|
|
seen := make(map[string]struct{}, len(cmds))
|
|
unqNames := make([]string, 0, len(cmds))
|
|
|
|
b := make([]byte, 0, 32*len(cmds))
|
|
|
|
for i, cmd := range cmds {
|
|
if i > numCmdLimit {
|
|
break
|
|
}
|
|
|
|
if i > 0 {
|
|
b = append(b, '\n')
|
|
}
|
|
b = appendCmd(b, cmd)
|
|
|
|
if len(unqNames) >= numNameLimit {
|
|
continue
|
|
}
|
|
|
|
name := cmd.FullName()
|
|
if _, ok := seen[name]; !ok {
|
|
seen[name] = struct{}{}
|
|
unqNames = append(unqNames, name)
|
|
}
|
|
}
|
|
|
|
tracer := global.Tracer("github.com/go-redis/redis")
|
|
ctx, span := tracer.Start(ctx, "pipeline "+strings.Join(unqNames, " "))
|
|
span.SetAttributes(
|
|
label.String("db.system", "redis"),
|
|
label.Int("redis.num_cmd", len(cmds)),
|
|
label.String("redis.cmds", internal.String(b)),
|
|
)
|
|
|
|
return ctx, nil
|
|
}
|
|
|
|
func (OpenTelemetryHook) AfterProcessPipeline(ctx context.Context, cmds []redis.Cmder) error {
|
|
span := trace.SpanFromContext(ctx)
|
|
if err := cmds[0].Err(); err != nil {
|
|
_ = internal.RecordError(ctx, err)
|
|
}
|
|
span.End()
|
|
return nil
|
|
}
|
|
|
|
func appendCmd(b []byte, cmd redis.Cmder) []byte {
|
|
const lenLimit = 64
|
|
|
|
for i, arg := range cmd.Args() {
|
|
if i > 0 {
|
|
b = append(b, ' ')
|
|
}
|
|
|
|
start := len(b)
|
|
b = internal.AppendArg(b, arg)
|
|
if len(b)-start > lenLimit {
|
|
b = append(b[:start+lenLimit], "..."...)
|
|
}
|
|
}
|
|
|
|
if err := cmd.Err(); err != nil {
|
|
b = append(b, ": "...)
|
|
b = append(b, err.Error()...)
|
|
}
|
|
|
|
return b
|
|
}
|