update atomic operation

Reviewed-on: #118

.gitignore

@@ -0,0 +1 @@
+.idea

go.mod

@@ -1,10 +1,19 @@
 module go.unistack.org/micro-store-redis/v3
 
-go 1.16
+go 1.22
+
+toolchain go1.22.4
 
 require (
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/redis/go-redis/extra/rediscmd/v9 v9.7.0
-	github.com/go-redis/redis/v8 v8.11.5
+	github.com/redis/go-redis/v9 v9.7.0
-	go.unistack.org/micro/v3 v3.10.18
+	go.unistack.org/micro/v3 v3.10.105
-	golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect
+)
+
+require (
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
+	google.golang.org/protobuf v1.35.2 // indirect
 )

go.sum

@@ -1,122 +1,20 @@
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-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

options.go

@@ -1,18 +1,67 @@
 package redis
 
 import (
-	"github.com/go-redis/redis/v8"
+	goredis "github.com/redis/go-redis/v9"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/meter"
 	"go.unistack.org/micro/v3/store"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 type configKey struct{}
 
-func Config(c *redis.Options) store.Option {
+func Config(c *goredis.Options) store.Option {
 	return store.SetOption(configKey{}, c)
 }
 
 type clusterConfigKey struct{}
 
-func ClusterConfig(c *redis.ClusterOptions) store.Option {
+func ClusterConfig(c *goredis.ClusterOptions) store.Option {
 	return store.SetOption(clusterConfigKey{}, c)
 }
+
+type universalConfigKey struct{}
+
+func UniversalConfig(c *goredis.UniversalOptions) store.Option {
+	return store.SetOption(universalConfigKey{}, c)
+}
+
+var (
+	labelHost = "redis_host"
+	labelName = "redis_name"
+)
+
+// Options struct holds wrapper options
+type Options struct {
+	Logger    logger.Logger
+	Meter     meter.Meter
+	Tracer    tracer.Tracer
+	RedisHost string
+	RedisName string
+}
+
+// Option func signature
+type Option func(*Options)
+
+// NewOptions create new Options struct from provided option slice
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Logger: logger.DefaultLogger,
+		Meter:  meter.DefaultMeter,
+		Tracer: tracer.DefaultTracer,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	options.Meter = options.Meter.Clone(
+		meter.Labels(
+			labelHost, options.RedisHost,
+			labelName, options.RedisName),
+	)
+
+	options.Logger = options.Logger.Clone(logger.WithAddCallerSkipCount(1))
+
+	return options
+}

redis.go

@@ -1,130 +1,278 @@
-package redis // import "go.unistack.org/micro-store-redis/v3"
+package redis
 
 import (
 	"context"
-	"fmt"
 	"reflect"
 	"strings"
+	"sync/atomic"
 	"time"
 
-	"github.com/go-redis/redis/v8"
+	goredis "github.com/redis/go-redis/v9"
+	"go.unistack.org/micro/v3/semconv"
 	"go.unistack.org/micro/v3/store"
+	pool "go.unistack.org/micro/v3/util/xpool"
 )
 
-type rkv struct {
+var (
-	opts store.Options
+	DefaultPathSeparator = "/"
-	cli  redisClient
+
+	DefaultUniversalOptions = &goredis.UniversalOptions{
+		Username:        "",
+		Password:        "", // no password set
+		MaxRetries:      2,
+		MaxRetryBackoff: 256 * time.Millisecond,
+		DialTimeout:     1 * time.Second,
+		ReadTimeout:     1 * time.Second,
+		WriteTimeout:    1 * time.Second,
+		PoolTimeout:     1 * time.Second,
+		MinIdleConns:    10,
+	}
+
+	DefaultClusterOptions = &goredis.ClusterOptions{
+		Username:        "",
+		Password:        "", // no password set
+		MaxRetries:      2,
+		MaxRetryBackoff: 256 * time.Millisecond,
+		DialTimeout:     1 * time.Second,
+		ReadTimeout:     1 * time.Second,
+		WriteTimeout:    1 * time.Second,
+		PoolTimeout:     1 * time.Second,
+		MinIdleConns:    10,
+	}
+
+	DefaultOptions = &goredis.Options{
+		Username:        "",
+		Password:        "", // no password set
+		DB:              0,  // use default DB
+		MaxRetries:      2,
+		MaxRetryBackoff: 256 * time.Millisecond,
+		DialTimeout:     1 * time.Second,
+		ReadTimeout:     1 * time.Second,
+		WriteTimeout:    1 * time.Second,
+		PoolTimeout:     1 * time.Second,
+		MinIdleConns:    10,
+	}
+)
+
+type Store struct {
+	opts        store.Options
+	cli         goredis.UniversalClient
+	done        chan struct{}
+	pool        *pool.StringsPool
+	isConnected atomic.Int32
 }
 
-type redisClient interface {
+func (r *Store) Connect(ctx context.Context) error {
-	Get(ctx context.Context, key string) *redis.StringCmd
+	if r.cli == nil {
-	Del(ctx context.Context, keys ...string) *redis.IntCmd
+		return store.ErrNotConnected
-	Set(ctx context.Context, key string, value interface{}, expiration time.Duration) *redis.StatusCmd
+	}
-	Keys(ctx context.Context, pattern string) *redis.StringSliceCmd
+	if r.opts.LazyConnect {
-	MGet(ctx context.Context, keys ...string) *redis.SliceCmd
+		return nil
-	MSet(ctx context.Context, kv ...interface{}) *redis.StatusCmd
+	}
-	Exists(ctx context.Context, keys ...string) *redis.IntCmd
+	return r.connect(ctx)
-	Ping(ctx context.Context) *redis.StatusCmd
+
-	Close() error
 }
 
-func (r *rkv) Connect(ctx context.Context) error {
+func (r *Store) Init(opts ...store.Option) error {
-	return r.cli.Ping(ctx).Err()
-}
-
-func (r *rkv) Init(opts ...store.Option) error {
 	for _, o := range opts {
 		o(&r.opts)
 	}
 
-	return r.configure()
+	err := r.configure()
-}
-
-func (r *rkv) Disconnect(ctx context.Context) error {
-	return r.cli.Close()
-}
-
-func (r *rkv) Exists(ctx context.Context, key string, opts ...store.ExistsOption) error {
-	options := store.NewExistsOptions(opts...)
-	if len(options.Namespace) == 0 {
-		options.Namespace = r.opts.Namespace
-	}
-	if options.Namespace != "" {
-		key = fmt.Sprintf("%s%s", r.opts.Namespace, key)
-	}
-	if r.opts.Timeout > 0 {
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
-		defer cancel()
-	}
-	val, err := r.cli.Exists(ctx, key).Result()
 	if err != nil {
 		return err
 	}
-	if val == 0 {
+
-		return store.ErrNotFound
+	return nil
+}
+
+func (r *Store) Client() *goredis.Client {
+	if c, ok := r.cli.(*goredis.Client); ok {
+		return c
 	}
 	return nil
 }
 
-func (r *rkv) Read(ctx context.Context, key string, val interface{}, opts ...store.ReadOption) error {
+func (r *Store) UniversalClient() goredis.UniversalClient {
-	options := store.NewReadOptions(opts...)
+	return r.cli
-	if len(options.Namespace) == 0 {
-		options.Namespace = r.opts.Namespace
-	}
-	if options.Namespace != "" {
-		key = fmt.Sprintf("%s%s", options.Namespace, key)
-	}
-	if r.opts.Timeout > 0 {
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
-		defer cancel()
-	}
-	buf, err := r.cli.Get(ctx, key).Bytes()
-	if err != nil && err == redis.Nil {
-		return store.ErrNotFound
-	} else if err != nil {
-		return err
-	}
-	if buf == nil {
-		return store.ErrNotFound
-	}
-	return r.opts.Codec.Unmarshal(buf, val)
 }
 
-func (r *rkv) MRead(ctx context.Context, keys []string, vals interface{}, opts ...store.ReadOption) error {
+func (r *Store) ClusterClient() *goredis.ClusterClient {
-	if len(keys) == 1 {
+	if c, ok := r.cli.(*goredis.ClusterClient); ok {
-		vt := reflect.ValueOf(vals)
+		return c
-		if vt.Kind() == reflect.Ptr {
+	}
-			vt = reflect.Indirect(vt)
+	return nil
-			return r.Read(ctx, keys[0], vt.Index(0).Interface(), opts...)
+}
+
+func (r *Store) Disconnect(ctx context.Context) error {
+	var err error
+	select {
+	case <-r.done:
+		return err
+	default:
+		if r.cli != nil {
+			if err = r.cli.Close(); err != nil {
+				r.isConnected.Store(0)
+			}
 		}
-	}
+		close(r.done)
-	options := store.NewReadOptions(opts...)
-	rkeys := make([]string, 0, len(keys))
-	if len(options.Namespace) == 0 {
-		options.Namespace = r.opts.Namespace
-	}
-	for _, key := range keys {
-		if options.Namespace != "" {
-			rkeys = append(rkeys, fmt.Sprintf("%s%s", options.Namespace, key))
-		} else {
-			rkeys = append(rkeys, key)
-		}
-	}
-	if r.opts.Timeout > 0 {
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
-		defer cancel()
-	}
-	rvals, err := r.cli.MGet(ctx, rkeys...).Result()
-	if err != nil && err == redis.Nil {
-		return store.ErrNotFound
-	} else if err != nil {
 		return err
 	}
-	if len(rvals) == 0 {
+}
+
+func (r *Store) Exists(ctx context.Context, key string, opts ...store.ExistsOption) error {
+	if err := r.connect(ctx); err != nil {
+		return err
+	}
+
+	b := r.pool.Get()
+	defer r.pool.Put(b)
+	options := store.NewExistsOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	rkey := r.getKey(b, r.opts.Namespace, options.Namespace, key)
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+	ts := time.Now()
+	val, err := r.cli.Exists(ctx, rkey).Result()
+	setSpanError(ctx, err)
+	te := time.Since(ts)
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil || (err == nil && val == 0) {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
 		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
+	}
+
+	return nil
+}
+
+func (r *Store) Read(ctx context.Context, key string, val interface{}, opts ...store.ReadOption) error {
+	if err := r.connect(ctx); err != nil {
+		return err
+	}
+
+	b := r.pool.Get()
+	defer r.pool.Put(b)
+
+	options := store.NewReadOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	rkey := r.getKey(b, r.opts.Namespace, options.Namespace, key)
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+	ts := time.Now()
+	buf, err := r.cli.Get(ctx, rkey).Bytes()
+	setSpanError(ctx, err)
+	te := time.Since(ts)
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil || (err == nil && buf == nil) {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
+	}
+
+	switch b := val.(type) {
+	case *[]byte:
+		*b = buf
+	case *string:
+		*b = string(buf)
+	default:
+		if err = r.opts.Codec.Unmarshal(buf, val); err != nil {
+			setSpanError(ctx, err)
+		}
+	}
+
+	return err
+}
+
+func (r *Store) MRead(ctx context.Context, keys []string, vals interface{}, opts ...store.ReadOption) error {
+	if err := r.connect(ctx); err != nil {
+		return err
+	}
+
+	options := store.NewReadOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	var rkeys []string
+	var pools []*strings.Builder
+	if r.opts.Namespace != "" || options.Namespace != "" {
+		rkeys = make([]string, len(keys))
+		pools = make([]*strings.Builder, len(keys))
+		for idx, key := range keys {
+			b := r.pool.Get()
+			pools[idx] = b
+			rkeys[idx] = r.getKey(b, r.opts.Namespace, options.Namespace, key)
+		}
+	}
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+	ts := time.Now()
+	var rvals []interface{}
+	var err error
+	if r.opts.Namespace != "" || options.Namespace != "" {
+		rvals, err = r.cli.MGet(ctx, rkeys...).Result()
+		for idx := range pools {
+			r.pool.Put(pools[idx])
+		}
+	} else {
+		rvals, err = r.cli.MGet(ctx, keys...).Result()
+	}
+	setSpanError(ctx, err)
+	te := time.Since(ts)
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil || (len(rvals) == 0) {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
 	}
 
 	vv := reflect.ValueOf(vals)
@@ -155,200 +303,480 @@ func (r *rkv) MRead(ctx context.Context, keys []string, vals interface{}, opts .
 		// special case for raw data
 		if vt.Kind() == reflect.Slice && vt.Elem().Kind() == reflect.Uint8 {
 			itm.Set(reflect.MakeSlice(itm.Type(), len(buf), len(buf)))
-		} else {
+			itm.SetBytes(buf)
-			itm.Set(reflect.New(vt.Elem()))
+			continue
+		} else if vt.Kind() == reflect.String {
+			itm.SetString(string(buf))
+			continue
 		}
+
+		itm.Set(reflect.New(vt.Elem()))
 		if err = r.opts.Codec.Unmarshal(buf, itm.Interface()); err != nil {
+			setSpanError(ctx, err)
 			return err
 		}
 	}
 	vv.Set(nvv)
+
 	return nil
 }
 
-func (r *rkv) MDelete(ctx context.Context, keys []string, opts ...store.DeleteOption) error {
+func (r *Store) MDelete(ctx context.Context, keys []string, opts ...store.DeleteOption) error {
-	options := store.NewDeleteOptions(opts...)
+	if err := r.connect(ctx); err != nil {
-	if len(options.Namespace) == 0 {
-		options.Namespace = r.opts.Namespace
-	}
-	if options.Namespace == "" {
-		return r.cli.Del(ctx, keys...).Err()
-	}
-	if r.opts.Timeout > 0 {
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
-		defer cancel()
-	}
-	for idx := range keys {
-		keys[idx] = options.Namespace + keys[idx]
-	}
-	return r.cli.Del(ctx, keys...).Err()
-}
-
-func (r *rkv) Delete(ctx context.Context, key string, opts ...store.DeleteOption) error {
-	options := store.NewDeleteOptions(opts...)
-	if len(options.Namespace) == 0 {
-		options.Namespace = r.opts.Namespace
-	}
-	if options.Namespace == "" {
-		return r.cli.Del(ctx, key).Err()
-	}
-	if r.opts.Timeout > 0 {
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
-		defer cancel()
-	}
-	return r.cli.Del(ctx, fmt.Sprintf("%s%s", options.Namespace, key)).Err()
-}
-
-func (r *rkv) Write(ctx context.Context, key string, val interface{}, opts ...store.WriteOption) error {
-	options := store.NewWriteOptions(opts...)
-	if len(options.Namespace) == 0 {
-		options.Namespace = r.opts.Namespace
-	}
-	buf, err := r.opts.Codec.Marshal(val)
-	if err != nil {
 		return err
 	}
-	if options.Namespace != "" {
+
-		key = fmt.Sprintf("%s%s", options.Namespace, key)
+	options := store.NewDeleteOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
 	}
-	if r.opts.Timeout > 0 {
+
+	if timeout > 0 {
 		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
+		ctx, cancel = context.WithTimeout(ctx, timeout)
 		defer cancel()
 	}
-	return r.cli.Set(ctx, key, buf, options.TTL).Err()
+
+	var rkeys []string
+	var pools []*strings.Builder
+	if r.opts.Namespace != "" || options.Namespace != "" {
+		rkeys = make([]string, len(keys))
+		pools = make([]*strings.Builder, len(keys))
+		for idx, key := range keys {
+			b := r.pool.Get()
+			pools[idx] = b
+			rkeys[idx] = r.getKey(b, r.opts.Namespace, options.Namespace, key)
+		}
+	}
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+	ts := time.Now()
+	var err error
+	if r.opts.Namespace != "" || options.Namespace != "" {
+		err = r.cli.Del(ctx, rkeys...).Err()
+		for idx := range pools {
+			r.pool.Put(pools[idx])
+		}
+	} else {
+		err = r.cli.Del(ctx, keys...).Err()
+	}
+	setSpanError(ctx, err)
+	te := time.Since(ts)
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
+	}
+
+	return nil
 }
 
-func (r *rkv) List(ctx context.Context, opts ...store.ListOption) ([]string, error) {
+func (r *Store) Delete(ctx context.Context, key string, opts ...store.DeleteOption) error {
+	if err := r.connect(ctx); err != nil {
+		return err
+	}
+
+	b := r.pool.Get()
+	defer r.pool.Put(b)
+
+	options := store.NewDeleteOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+	ts := time.Now()
+	err := r.cli.Del(ctx, r.getKey(b, r.opts.Namespace, options.Namespace, key)).Err()
+	te := time.Since(ts)
+	setSpanError(ctx, err)
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
+	}
+
+	return nil
+}
+
+func (r *Store) MWrite(ctx context.Context, keys []string, vals []interface{}, opts ...store.WriteOption) error {
+	if err := r.connect(ctx); err != nil {
+		return err
+	}
+
+	options := store.NewWriteOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	kvs := make([]string, 0, len(keys)*2)
+	pools := make([]*strings.Builder, len(keys))
+	for idx, key := range keys {
+		b := r.pool.Get()
+		pools[idx] = b
+		kvs = append(kvs, r.getKey(b, r.opts.Namespace, options.Namespace, key))
+
+		switch vt := vals[idx].(type) {
+		case string:
+			kvs = append(kvs, vt)
+		case []byte:
+			kvs = append(kvs, string(vt))
+		default:
+			buf, err := r.opts.Codec.Marshal(vt)
+			if err != nil {
+				return err
+			}
+			kvs = append(kvs, string(buf))
+		}
+	}
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+
+	pipeliner := func(pipe goredis.Pipeliner) error {
+		for idx := 0; idx < len(kvs); idx += 2 {
+			if _, err := pipe.Set(ctx, kvs[idx], kvs[idx+1], options.TTL).Result(); err != nil {
+				setSpanError(ctx, err)
+				return err
+			}
+		}
+		return nil
+	}
+
+	ts := time.Now()
+	cmds, err := r.cli.Pipelined(ctx, pipeliner)
+	for idx := range pools {
+		r.pool.Put(pools[idx])
+	}
+	te := time.Since(ts)
+	setSpanError(ctx, err)
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
+	}
+
+	for _, cmd := range cmds {
+		if err = cmd.Err(); err != nil {
+			if err == goredis.Nil {
+				r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+				return store.ErrNotFound
+			}
+			setSpanError(ctx, err)
+			r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (r *Store) Write(ctx context.Context, key string, val interface{}, opts ...store.WriteOption) error {
+	if err := r.connect(ctx); err != nil {
+		return err
+	}
+
+	b := r.pool.Get()
+	defer r.pool.Put(b)
+
+	options := store.NewWriteOptions(opts...)
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	rkey := r.getKey(b, r.opts.Namespace, options.Namespace, key)
+
+	var buf []byte
+	switch vt := val.(type) {
+	case string:
+		buf = []byte(vt)
+	case []byte:
+		buf = vt
+	default:
+		var err error
+		buf, err = r.opts.Codec.Marshal(val)
+		if err != nil {
+			return err
+		}
+	}
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
+	ts := time.Now()
+	err := r.cli.Set(ctx, rkey, buf, options.TTL).Err()
+	te := time.Since(ts)
+	setSpanError(ctx, err)
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
+		return err
+	}
+
+	return err
+}
+
+func (r *Store) List(ctx context.Context, opts ...store.ListOption) ([]string, error) {
+	if err := r.connect(ctx); err != nil {
+		return nil, err
+	}
+
+	b := r.pool.Get()
+	defer r.pool.Put(b)
+
 	options := store.NewListOptions(opts...)
 	if len(options.Namespace) == 0 {
 		options.Namespace = r.opts.Namespace
 	}
 
-	rkey := fmt.Sprintf("%s%s*", options.Namespace, options.Prefix)
+	rkey := r.getKey(b, options.Namespace, "", options.Prefix+"*")
 	if options.Suffix != "" {
 		rkey += options.Suffix
 	}
-	if r.opts.Timeout > 0 {
+
+	timeout := r.opts.Timeout
+	if options.Timeout > 0 {
+		timeout = options.Timeout
+	}
+
+	if timeout > 0 {
 		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, r.opts.Timeout)
+		ctx, cancel = context.WithTimeout(ctx, timeout)
 		defer cancel()
 	}
+
 	// TODO: add support for prefix/suffix/limit
-	keys, err := r.cli.Keys(ctx, rkey).Result()
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Inc()
-	if err != nil {
+	ts := time.Now()
+	var keys []string
+	var err error
+
+	if c, ok := r.cli.(*goredis.ClusterClient); ok {
+		err = c.ForEachMaster(ctx, func(nctx context.Context, cli *goredis.Client) error {
+			nkeys, nerr := cli.Keys(nctx, rkey).Result()
+			if nerr != nil {
+				return nerr
+			}
+			keys = append(keys, nkeys...)
+			return nil
+		})
+	} else {
+		keys, err = r.cli.Keys(ctx, rkey).Result()
+	}
+	te := time.Since(ts)
+	setSpanError(ctx, err)
+
+	r.opts.Meter.Counter(semconv.StoreRequestInflight, "name", options.Name).Dec()
+	r.opts.Meter.Summary(semconv.StoreRequestLatencyMicroseconds, "name", options.Name).Update(te.Seconds())
+	r.opts.Meter.Histogram(semconv.StoreRequestDurationSeconds, "name", options.Name).Update(te.Seconds())
+	if err == goredis.Nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "miss").Inc()
+		return nil, store.ErrNotFound
+	} else if err == nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "hit").Inc()
+	} else if err != nil {
+		r.opts.Meter.Counter(semconv.StoreRequestTotal, "name", options.Name, "status", "failure").Inc()
 		return nil, err
 	}
-	if options.Namespace == "" {
+
+	prefix := r.opts.Namespace
+	if options.Namespace != "" {
+		prefix = options.Namespace
+	}
+	if prefix == "" {
 		return keys, nil
 	}
 
-	nkeys := make([]string, 0, len(keys))
+	for idx, key := range keys {
-	for _, key := range keys {
+		keys[idx] = strings.TrimPrefix(key, prefix)
-		nkeys = append(nkeys, strings.TrimPrefix(key, options.Namespace))
 	}
-	return nkeys, nil
+
+	return keys, nil
 }
 
-func (r *rkv) Options() store.Options {
+func (r *Store) Options() store.Options {
 	return r.opts
 }
 
-func (r *rkv) Name() string {
+func (r *Store) Name() string {
 	return r.opts.Name
 }
 
-func (r *rkv) String() string {
+func (r *Store) String() string {
 	return "redis"
 }
 
-func NewStore(opts ...store.Option) *rkv {
+func NewStore(opts ...store.Option) *Store {
-	return &rkv{opts: store.NewOptions(opts...)}
+	return &Store{done: make(chan struct{}), opts: store.NewOptions(opts...)}
 }
 
-func (r *rkv) configure() error {
+func (r *Store) configure() error {
-	var redisOptions *redis.Options
-	var redisClusterOptions *redis.ClusterOptions
-	var err error
-
-	nodes := r.opts.Addrs
-
-	if len(nodes) == 0 {
-		nodes = []string{"redis://127.0.0.1:6379"}
-	}
-
 	if r.cli != nil && r.opts.Context == nil {
 		return nil
 	}
 
+	universalOptions := DefaultUniversalOptions
+
 	if r.opts.Context != nil {
-		if c, ok := r.opts.Context.Value(configKey{}).(*redis.Options); ok {
+		if o, ok := r.opts.Context.Value(configKey{}).(*goredis.Options); ok {
-			redisOptions = c
+			universalOptions.Addrs = []string{o.Addr}
+			universalOptions.Dialer = o.Dialer
+			universalOptions.OnConnect = o.OnConnect
+			universalOptions.Username = o.Username
+			universalOptions.Password = o.Password
+
+			universalOptions.MaxRetries = o.MaxRetries
+			universalOptions.MinRetryBackoff = o.MinRetryBackoff
+			universalOptions.MaxRetryBackoff = o.MaxRetryBackoff
+
+			universalOptions.DialTimeout = o.DialTimeout
+			universalOptions.ReadTimeout = o.ReadTimeout
+			universalOptions.WriteTimeout = o.WriteTimeout
+			universalOptions.ContextTimeoutEnabled = o.ContextTimeoutEnabled
+
+			universalOptions.PoolFIFO = o.PoolFIFO
+
+			universalOptions.PoolSize = o.PoolSize
+			universalOptions.PoolTimeout = o.PoolTimeout
+			universalOptions.MinIdleConns = o.MinIdleConns
+			universalOptions.MaxIdleConns = o.MaxIdleConns
+			universalOptions.ConnMaxIdleTime = o.ConnMaxIdleTime
+			universalOptions.ConnMaxLifetime = o.ConnMaxLifetime
+
 			if r.opts.TLSConfig != nil {
-				redisOptions.TLSConfig = r.opts.TLSConfig
+				universalOptions.TLSConfig = r.opts.TLSConfig
 			}
 		}
 
-		if c, ok := r.opts.Context.Value(clusterConfigKey{}).(*redis.ClusterOptions); ok {
+		if o, ok := r.opts.Context.Value(clusterConfigKey{}).(*goredis.ClusterOptions); ok {
-			redisClusterOptions = c
+			universalOptions.Addrs = o.Addrs
+			universalOptions.Dialer = o.Dialer
+			universalOptions.OnConnect = o.OnConnect
+			universalOptions.Username = o.Username
+			universalOptions.Password = o.Password
+
+			universalOptions.MaxRedirects = o.MaxRedirects
+			universalOptions.ReadOnly = o.ReadOnly
+			universalOptions.RouteByLatency = o.RouteByLatency
+			universalOptions.RouteRandomly = o.RouteRandomly
+
+			universalOptions.MaxRetries = o.MaxRetries
+			universalOptions.MinRetryBackoff = o.MinRetryBackoff
+			universalOptions.MaxRetryBackoff = o.MaxRetryBackoff
+
+			universalOptions.DialTimeout = o.DialTimeout
+			universalOptions.ReadTimeout = o.ReadTimeout
+			universalOptions.WriteTimeout = o.WriteTimeout
+			universalOptions.ContextTimeoutEnabled = o.ContextTimeoutEnabled
+
+			universalOptions.PoolFIFO = o.PoolFIFO
+
+			universalOptions.PoolSize = o.PoolSize
+			universalOptions.PoolTimeout = o.PoolTimeout
+			universalOptions.MinIdleConns = o.MinIdleConns
+			universalOptions.MaxIdleConns = o.MaxIdleConns
+			universalOptions.ConnMaxIdleTime = o.ConnMaxIdleTime
+			universalOptions.ConnMaxLifetime = o.ConnMaxLifetime
 			if r.opts.TLSConfig != nil {
-				redisClusterOptions.TLSConfig = r.opts.TLSConfig
+				universalOptions.TLSConfig = r.opts.TLSConfig
+			}
+		}
+
+		if o, ok := r.opts.Context.Value(universalConfigKey{}).(*goredis.UniversalOptions); ok {
+			universalOptions = o
+			if r.opts.TLSConfig != nil {
+				universalOptions.TLSConfig = r.opts.TLSConfig
 			}
 		}
 	}
 
-	if redisOptions != nil && redisClusterOptions != nil {
+	if len(r.opts.Addrs) > 0 {
-		return fmt.Errorf("must specify only one option Config or ClusterConfig")
+		universalOptions.Addrs = r.opts.Addrs
+	} else {
+		universalOptions.Addrs = []string{"127.0.0.1:6379"}
 	}
 
-	if redisOptions == nil && redisClusterOptions == nil && r.cli != nil {
+	r.cli = goredis.NewUniversalClient(universalOptions)
-		return nil
+	setTracing(r.cli, r.opts.Tracer)
-	}
 
-	if redisOptions == nil && redisClusterOptions == nil && len(nodes) == 1 {
+	r.pool = pool.NewStringsPool(50)
-		redisOptions, err = redis.ParseURL(nodes[0])
-		if err != nil {
-			// Backwards compatibility
-			redisOptions = &redis.Options{
-				Addr:            nodes[0],
-				Username:        "",
-				Password:        "", // no password set
-				DB:              0,  // use default DB
-				MaxRetries:      2,
-				MaxRetryBackoff: 256 * time.Millisecond,
-				DialTimeout:     1 * time.Second,
-				ReadTimeout:     1 * time.Second,
-				WriteTimeout:    1 * time.Second,
-				PoolTimeout:     1 * time.Second,
-				IdleTimeout:     20 * time.Second,
-				MinIdleConns:    10,
-				TLSConfig:       r.opts.TLSConfig,
-			}
-		}
-	} else if redisOptions == nil && redisClusterOptions == nil && len(nodes) > 1 {
-		redisClusterOptions = &redis.ClusterOptions{
-			Addrs:           nodes,
-			Username:        "",
-			Password:        "", // no password set
-			MaxRetries:      2,
-			MaxRetryBackoff: 256 * time.Millisecond,
-			DialTimeout:     1 * time.Second,
-			ReadTimeout:     1 * time.Second,
-			WriteTimeout:    1 * time.Second,
-			PoolTimeout:     1 * time.Second,
-			IdleTimeout:     20 * time.Second,
-			MinIdleConns:    10,
-			TLSConfig:       r.opts.TLSConfig,
-		}
-	}
 
-	if redisOptions != nil {
+	r.statsMeter()
-		r.cli = redis.NewClient(redisOptions)
-	} else if redisClusterOptions != nil {
-		r.cli = redis.NewClusterClient(redisClusterOptions)
-	}
 
 	return nil
 }
+
+func (r *Store) getKey(b *strings.Builder, mainNamespace string, opNamespace string, key string) string {
+	if opNamespace == "" {
+		opNamespace = mainNamespace
+	}
+	if opNamespace != "" {
+		b.WriteString(opNamespace)
+		b.WriteString(DefaultPathSeparator)
+	}
+	b.WriteString(key)
+	return b.String()
+}
+
+func (r *Store) connect(ctx context.Context) (err error) {
+	if r.isConnected.Load() == 0 {
+		if err = r.cli.Ping(ctx).Err(); err != nil {
+			setSpanError(ctx, err)
+			return err
+		}
+	}
+	r.isConnected.Store(1)
+	return err
+}

redis_test.go

@@ -7,14 +7,42 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8"
+	goredis "github.com/redis/go-redis/v9"
 	"go.unistack.org/micro/v3/store"
+	"go.unistack.org/micro/v3/tracer"
 )
 
+func TestKeepTTL(t *testing.T) {
+	ctx := context.Background()
+
+	if tr := os.Getenv("INTEGRATION_TESTS"); len(tr) > 0 {
+		t.Skip()
+	}
+	r := NewStore(store.Addrs(os.Getenv("STORE_NODES")))
+
+	if err := r.Init(); err != nil {
+		t.Fatal(err)
+	}
+	if err := r.Connect(ctx); err != nil {
+		t.Fatal(err)
+	}
+
+	key := "key"
+	err := r.Write(ctx, key, "val1", store.WriteTTL(15*time.Second))
+	if err != nil {
+		t.Fatalf("Write error: %v", err)
+	}
+	time.Sleep(3 * time.Second)
+	err = r.Write(ctx, key, "val2", store.WriteTTL(-1))
+	if err != nil {
+		t.Fatalf("Write error: %v", err)
+	}
+}
+
 func Test_rkv_configure(t *testing.T) {
 	type fields struct {
 		options store.Options
-		Client  *redis.Client
+		Client  goredis.UniversalClient
 	}
 	type wantValues struct {
 		username string
@@ -37,7 +65,7 @@ func Test_rkv_configure(t *testing.T) {
 			},
 		},
 		{
-			name: "legacy Url", fields: fields{options: store.Options{Addrs: []string{"127.0.0.1:6379"}}, Client: nil},
+			name: "legacy Url", fields: fields{options: store.Options{Tracer: tracer.DefaultTracer, Addrs: []string{"127.0.0.1:6379"}}, Client: nil},
 			wantErr: false, want: wantValues{
 				username: "",
 				password: "",
@@ -45,7 +73,7 @@ func Test_rkv_configure(t *testing.T) {
 			},
 		},
 		{
-			name: "New Url", fields: fields{options: store.Options{Addrs: []string{"redis://127.0.0.1:6379"}}, Client: nil},
+			name: "New Url", fields: fields{options: store.Options{Tracer: tracer.DefaultTracer, Addrs: []string{"redis://127.0.0.1:6379"}}, Client: nil},
 			wantErr: false, want: wantValues{
 				username: "",
 				password: "",
@@ -53,7 +81,7 @@ func Test_rkv_configure(t *testing.T) {
 			},
 		},
 		{
-			name: "Url with Pwd", fields: fields{options: store.Options{Addrs: []string{"redis://:password@redis:6379"}}, Client: nil},
+			name: "Url with Pwd", fields: fields{options: store.Options{Tracer: tracer.DefaultTracer, Addrs: []string{"redis://:password@redis:6379"}}, Client: nil},
 			wantErr: false, want: wantValues{
 				username: "",
 				password: "password",
@@ -61,7 +89,7 @@ func Test_rkv_configure(t *testing.T) {
 			},
 		},
 		{
-			name: "Url with username and Pwd", fields: fields{options: store.Options{Addrs: []string{"redis://username:password@redis:6379"}}, Client: nil},
+			name: "Url with username and Pwd", fields: fields{options: store.Options{Tracer: tracer.DefaultTracer, Addrs: []string{"redis://username:password@redis:6379"}}, Client: nil},
 			wantErr: false, want: wantValues{
 				username: "username",
 				password: "password",
@@ -71,11 +99,11 @@ func Test_rkv_configure(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			r := &rkv{
+			rc := &Store{
 				opts: tt.fields.options,
 				cli:  tt.fields.Client,
 			}
-			err := r.configure()
+			err := rc.configure()
 			if (err != nil) != tt.wantErr {
 				t.Errorf("configure() error = %v, wantErr %v", err, tt.wantErr)
 				return

stats.go

@@ -0,0 +1,49 @@
+package redis
+
+import (
+	"time"
+
+	goredis "github.com/redis/go-redis/v9"
+	"go.unistack.org/micro/v3/meter"
+)
+
+var (
+	PoolHitsTotal        = "pool_hits_total"
+	PoolMissesTotal      = "pool_misses_total"
+	PoolTimeoutTotal     = "pool_timeout_total"
+	PoolConnTotalCurrent = "pool_conn_total_current"
+	PoolConnIdleCurrent  = "pool_conn_idle_current"
+	PoolConnStaleTotal   = "pool_conn_stale_total"
+)
+
+type Statser interface {
+	PoolStats() *goredis.PoolStats
+}
+
+func (r *Store) statsMeter() {
+	var st Statser
+
+	if r.cli != nil {
+		st = r.cli
+	} else {
+		return
+	}
+
+	go func() {
+		ticker := time.NewTicker(meter.DefaultMeterStatsInterval)
+		defer ticker.Stop()
+
+		for _ = range ticker.C {
+			if st == nil {
+				return
+			}
+			stats := st.PoolStats()
+			r.opts.Meter.Counter(PoolHitsTotal).Set(uint64(stats.Hits))
+			r.opts.Meter.Counter(PoolMissesTotal).Set(uint64(stats.Misses))
+			r.opts.Meter.Counter(PoolTimeoutTotal).Set(uint64(stats.Timeouts))
+			r.opts.Meter.Counter(PoolConnTotalCurrent).Set(uint64(stats.TotalConns))
+			r.opts.Meter.Counter(PoolConnIdleCurrent).Set(uint64(stats.IdleConns))
+			r.opts.Meter.Counter(PoolConnStaleTotal).Set(uint64(stats.StaleConns))
+		}
+	}()
+}

tracer.go

@@ -0,0 +1,128 @@
+package redis
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"strconv"
+
+	rediscmd "github.com/redis/go-redis/extra/rediscmd/v9"
+	goredis "github.com/redis/go-redis/v9"
+	"go.unistack.org/micro/v3/tracer"
+)
+
+func setTracing(rdb goredis.UniversalClient, tr tracer.Tracer, opts ...tracer.SpanOption) {
+	switch rdb := rdb.(type) {
+	case *goredis.Client:
+		opt := rdb.Options()
+		connString := formatDBConnString(opt.Network, opt.Addr)
+		rdb.AddHook(newTracingHook(connString, tr))
+	case *goredis.ClusterClient:
+		rdb.OnNewNode(func(rdb *goredis.Client) {
+			opt := rdb.Options()
+			connString := formatDBConnString(opt.Network, opt.Addr)
+			rdb.AddHook(newTracingHook(connString, tr))
+		})
+	case *goredis.Ring:
+		rdb.OnNewNode(func(rdb *goredis.Client) {
+			opt := rdb.Options()
+			connString := formatDBConnString(opt.Network, opt.Addr)
+			rdb.AddHook(newTracingHook(connString, tr))
+		})
+	}
+}
+
+type tracingHook struct {
+	tr   tracer.Tracer
+	opts []tracer.SpanOption
+}
+
+var _ goredis.Hook = (*tracingHook)(nil)
+
+func newTracingHook(connString string, tr tracer.Tracer, opts ...tracer.SpanOption) *tracingHook {
+	opts = append(opts, tracer.WithSpanKind(tracer.SpanKindClient))
+	if connString != "" {
+		opts = append(opts, tracer.WithSpanLabels("db.connection_string", connString))
+	}
+
+	return &tracingHook{
+		tr:   tr,
+		opts: opts,
+	}
+}
+
+func (h *tracingHook) DialHook(hook goredis.DialHook) goredis.DialHook {
+	return func(ctx context.Context, network, addr string) (net.Conn, error) {
+		/*
+			_, span := h.tr.Start(ctx, "goredis.dial", h.opts...)
+			defer span.Finish()
+		*/
+		conn, err := hook(ctx, network, addr)
+		// recordError(span, err)
+
+		return conn, err
+	}
+}
+
+func (h *tracingHook) ProcessHook(hook goredis.ProcessHook) goredis.ProcessHook {
+	return func(ctx context.Context, cmd goredis.Cmder) error {
+		cmdString := rediscmd.CmdString(cmd)
+		var err error
+
+		switch cmdString {
+		case "cluster slots":
+			break
+		default:
+			_, span := h.tr.Start(ctx, "goredis.process", append(h.opts, tracer.WithSpanLabels("db.statement", cmdString))...)
+			defer func() {
+				recordError(span, err)
+				span.Finish()
+			}()
+		}
+
+		err = hook(ctx, cmd)
+
+		return err
+	}
+}
+
+func (h *tracingHook) ProcessPipelineHook(hook goredis.ProcessPipelineHook) goredis.ProcessPipelineHook {
+	return func(ctx context.Context, cmds []goredis.Cmder) error {
+		_, cmdsString := rediscmd.CmdsString(cmds)
+
+		opts := append(h.opts, tracer.WithSpanLabels(
+			"db.goredis.num_cmd", strconv.Itoa(len(cmds)),
+			"db.statement", cmdsString,
+		))
+
+		_, span := h.tr.Start(ctx, "goredis.process_pipeline", opts...)
+		defer span.Finish()
+
+		err := hook(ctx, cmds)
+		recordError(span, err)
+
+		return err
+	}
+}
+
+func setSpanError(ctx context.Context, err error) {
+	if err == nil || err == goredis.Nil {
+		return
+	}
+	if sp, ok := tracer.SpanFromContext(ctx); !ok && sp != nil {
+		sp.SetStatus(tracer.SpanStatusError, err.Error())
+	}
+}
+
+func recordError(span tracer.Span, err error) {
+	if err != nil && err != goredis.Nil {
+		span.SetStatus(tracer.SpanStatusError, err.Error())
+	}
+}
+
+func formatDBConnString(network, addr string) string {
+	if network == "tcp" {
+		network = "redis"
+	}
+	return fmt.Sprintf("%s://%s", network, addr)
+}