### Install valkeylimiter module

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeylimiter

Command to install the package via go get.

```bash
go get github.com/valkey-io/valkey-go/valkeylimiter
```

--------------------------------

### Initialize and use RateLimiter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeylimiter

Full example demonstrating initialization, checking, and allowing requests with the rate limiter.

```go
package main

import (
	"context"
	"fmt"
	"time"

	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeylimiter"
)

func main() {
	// Initialize a new rate limiter with a limit of 5 requests per minute
	limiter, err := valkeylimiter.NewRateLimiter(valkeylimiter.RateLimiterOption{
		ClientOption: valkey.ClientOption{InitAddress: []string{"localhost:6379"}},
		KeyPrefix:    "api_rate_limit",
		Limit:        5,
		Window:       time.Minute,
	})
	if err != nil {
		panic(err)
	}

	identifier := "user_123"

	// Check if a request is allowed
	result, err := limiter.Check(context.Background(), identifier)
	if err != nil {
		panic(err)
	}
	fmt.Printf("Allowed: %v, Remaining: %d, RetryAfter: %v\n", result.Allowed, result.Remaining, result.RetryAfter)

	// Allow a request
	result, err = limiter.Allow(context.Background(), identifier)
	if err != nil {
		panic(err)
	}
	fmt.Printf("Allowed: %v, Remaining: %d, RetryAfter: %v\n", result.Allowed, result.Remaining, result.RetryAfter)

	// Allow multiple requests
	result, err = limiter.AllowN(context.Background(), identifier, 3)
	if err != nil {
		panic(err)
	}
	fmt.Printf("Allowed: %v, Remaining: %d, RetryAfter: %v\n", result.Allowed, result.Remaining, result.RetryAfter)
}
```

--------------------------------

### Implement Cache-Aside with valkeyaside

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyaside

Demonstrates initializing a client and using the Get method to fetch data from a database with a cache-aside strategy.

```go
package main

import (
	"context"
	"database/sql"
	"time"

	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeyaside"
)

func main() {
	var db sql.DB
	client, err := valkeyaside.NewClient(valkeyaside.ClientOption{
		ClientOption: valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}},
	})
	if err != nil {
		panic(err)
	}
	val, err := client.Get(context.Background(), time.Minute, "mykey", func(ctx context.Context, key string) (val string, err error) {
		if err = db.QueryRowContext(ctx, "SELECT val FROM mytab WHERE id = ?", key).Scan(&val); err == sql.ErrNoRows {
			val = "_nil_" // cache nil to avoid penetration.
			err = nil     // clear err in the case of sql.ErrNoRows.
		}
		return
	})
	if err != nil {
		panic(err)
	} else if val == "_nil_" {
		val = ""
		err = sql.ErrNoRows
	} else {
		// ...
	}
}
```

--------------------------------

### Initialize and use valkeycompatmock adapter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompatmock

Demonstrates setting up a gomock controller and defining expectations for Get and Set operations.

```go
package main

import (
	"context"
	"testing"

	"github.com/valkey-io/valkey-go/mock"
	"github.com/valkey-io/valkey-go/valkeycompat"
	"github.com/valkey-io/valkey-go/valkeycompatmock"
	"go.uber.org/mock/gomock"
)

func TestExample(t *testing.T) {
	ctrl := gomock.NewController(t)
	m := mock.NewClient(ctrl)
	compatmock := valkeycompatmock.NewAdapter(m)

	compatmock.ExpectSet("key", "val", 0).SetVal("OK")
	compatmock.ExpectGet("key").SetVal("val")

	rdb := valkeycompat.NewAdapter(m)
	rdb.Set(context.Background(), "key", "val", 0)
	rdb.Get(context.Background(), "key")
}
```

--------------------------------

### Connect Go Client via RDMA

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyrdma

Example of initializing a Valkey client with the RDMA dialer function.

```go
package main

import (
	"context"

	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeyrdma"
)

func main() {
	client, err := valkey.NewClient(valkey.ClientOption{
		InitAddress: []string{"<server ip on the rdma netdev>:6378"},
		DialCtxFn:   valkeyrdma.DialCtxFn,
	})
	...
}
```

--------------------------------

### Build Valkey with RDMA Support

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyrdma

Commands to install dependencies and compile the Valkey server with the RDMA module.

```bash
sudo apt install -y build-essential pkg-config libjemalloc-dev
sudo apt install -y librdmacm-dev rdma-core rdmacm-utils
wget https://github.com/valkey-io/valkey/archive/refs/tags/9.0.1.tar.gz
tar -zxvf 9.0.1.tar.gz && rm 9.0.1.tar.gz
cd valkey-9.0.1

BUILD_RDMA=module make
```

--------------------------------

### Configure RDMA Network and Server

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyrdma

Commands to set up the RoCEv2 link, verify connectivity with rping, and start the Valkey server with RDMA.

```bash
sudo rdma link add rxe0 type rxe netdev <eth0 or enp2s0>
```

```bash
rping -s -a <server ip on the rdma netdev> -v
```

```bash
rping -c -a <server ip on the rdma netdev> -v
```

```bash
./src/valkey-server --loadmodule ./src/valkey-rdma.so --rdma-bind <server ip on the rdma netdev> --rdma-port 6378
```

```bash
./src/valkey-cli -h <server ip on the rdma netdev> -p 6378 --rdma hello 3
```

--------------------------------

### Common command response parsing examples

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

A reference for selecting the correct parser method based on the expected Valkey command response type.

```go
// GET
client.Do(ctx, client.B().Get().Key("k").Build()).ToString()
client.Do(ctx, client.B().Get().Key("k").Build()).AsInt64()
// MGET
client.Do(ctx, client.B().Mget().Key("k1", "k2").Build()).ToArray()
// SET
client.Do(ctx, client.B().Set().Key("k").Value("v").Build()).Error()
// INCR
client.Do(ctx, client.B().Incr().Key("k").Build()).AsInt64()
// HGET
client.Do(ctx, client.B().Hget().Key("k").Field("f").Build()).ToString()
// HMGET
client.Do(ctx, client.B().Hmget().Key("h").Field("a", "b").Build()).ToArray()
// HGETALL
client.Do(ctx, client.B().Hgetall().Key("h").Build()).AsStrMap()
// EXPIRE
client.Do(ctx, client.B().Expire().Key("k").Seconds(1).Build()).AsInt64()
// HEXPIRE
client.Do(ctx, client.B().Hexpire().Key("h").Seconds(1).Fields().Numfields(2).Field("f1", "f2").Build()).AsIntSlice()
// ZRANGE
client.Do(ctx, client.B().Zrange().Key("k").Min("1").Max("2").Build()).AsStrSlice()
// ZRANK
client.Do(ctx, client.B().Zrank().Key("k").Member("m").Build()).AsInt64()
// ZSCORE
client.Do(ctx, client.B().Zscore().Key("k").Member("m").Build()).AsFloat64()
// ZRANGE
client.Do(ctx, client.B().Zrange().Key("k").Min("0").Max("-1").Build()).AsStrSlice()
client.Do(ctx, client.B().Zrange().Key("k").Min("0").Max("-1").Withscores().Build()).AsZScores()
// ZPOPMIN
client.Do(ctx, client.B().Zpopmin().Key("k").Build()).AsZScore()
client.Do(ctx, client.B().Zpopmin().Key("myzset").Count(2).Build()).AsZScores()
// SCARD
client.Do(ctx, client.B().Scard().Key("k").Build()).AsInt64()
// SMEMBERS
client.Do(ctx, client.B().Smembers().Key("k").Build()).AsStrSlice()
// LINDEX
client.Do(ctx, client.B().Lindex().Key("k").Index(0).Build()).ToString()
// LPOP
client.Do(ctx, client.B().Lpop().Key("k").Build()).ToString()
client.Do(ctx, client.B().Lpop().Key("k").Count(2).Build()).AsStrSlice()
// SCAN
client.Do(ctx, client.B().Scan().Cursor(0).Build()).AsScanEntry()
// FT.SEARCH
client.Do(ctx, client.B().FtSearch().Index("idx").Query("@f:v").Build()).AsFtSearch()
// GEOSEARCH
client.Do(ctx, client.B().Geosearch().Key("k").Fromlonlat(1, 1).Bybox(1).Height(1).Km().Build()).AsGeosearch()
```

--------------------------------

### String Command Methods

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for performing standard string operations like Get, Set, and increment/decrement.

```go
SortStore(ctx context.Context, key, store string, sort Sort) *IntCmd
SortInterfaces(ctx context.Context, key string, sort Sort) *SliceCmd
Touch(ctx context.Context, keys ...string) *IntCmd
TTL(ctx context.Context, key string) *DurationCmd
Type(ctx context.Context, key string) *StatusCmd
Append(ctx context.Context, key, value string) *IntCmd
Decr(ctx context.Context, key string) *IntCmd
DecrBy(ctx context.Context, key string, decrement int64) *IntCmd
Get(ctx context.Context, key string) *StringCmd
GetRange(ctx context.Context, key string, start, end int64) *StringCmd
GetSet(ctx context.Context, key string, value any) *StringCmd
GetEx(ctx context.Context, key string, expiration time.Duration) *StringCmd
GetDel(ctx context.Context, key string) *StringCmd
Incr(ctx context.Context, key string) *IntCmd
IncrBy(ctx context.Context, key string, value int64) *IntCmd
IncrByFloat(ctx context.Context, key string, value float64) *FloatCmd
MGet(ctx context.Context, keys ...string) *SliceCmd
MSet(ctx context.Context, values ...any) *StatusCmd
MSetNX(ctx context.Context, values ...any) *BoolCmd
Set(ctx context.Context, key string, value any, expiration time.Duration) *StatusCmd
SetArgs(ctx context.Context, key string, value any, a SetArgs) *StatusCmd
SetEX(ctx context.Context, key string, value any, expiration time.Duration) *StatusCmd
SetNX(ctx context.Context, key string, value any, expiration time.Duration) *BoolCmd
SetXX(ctx context.Context, key string, value any, expiration time.Duration) *BoolCmd
SetRange(ctx context.Context, key string, offset int64, value string) *IntCmd
StrLen(ctx context.Context, key string) *IntCmd
Copy(ctx context.Context, sourceKey string, destKey string, db int64, replace bool) *IntCmd
```

--------------------------------

### Initialize and Execute Commands with Valkey

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Demonstrates basic client initialization and command execution using the builder pattern. Ensure the client is closed after use to release resources.

```go
package main

import (
  "context"
  "github.com/valkey-io/valkey-go"
)

func main() {
  client, err := valkey.NewClient(valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
  if err != nil {
    panic(err)
  }
  defer client.Close()

  ctx := context.Background()
  // SET key val NX
  err = client.Do(ctx, client.B().Set().Key("key").Value("val").Nx().Build()).Error()
  // HGETALL hm
  hm, err := client.Do(ctx, client.B().Hgetall().Key("hm").Build()).AsStrMap()
}
```

--------------------------------

### HLen

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets the number of fields in a hash.

```go
func (c *Compat) HLen(ctx context.Context, key string) *IntCmd
```

--------------------------------

### HGetDel

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets and deletes fields from a hash.

```go
func (c *Compat) HGetDel(ctx context.Context, key string, fields ...string) *StringSliceCmd
```

--------------------------------

### JSONGetArgs Structure

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Arguments for JSON get operations.

```go
type JSONGetArgs struct {
	Indent  string
	Newline string
	Space   string
}
```

--------------------------------

### TSGet

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets the last sample of a time-series key.

```APIDOC
## func (*Compat) TSGet

### Description
Gets the last sample of a time-series key.

### Signature
`func (c *Compat) TSGet(ctx context.Context, key string) *TSTimestampValueCmd`
```

--------------------------------

### HPTTL

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets the time-to-live for hash fields in milliseconds.

```go
func (c *Compat) HPTTL(ctx context.Context, key string, fields ...string) *IntSliceCmd
```

--------------------------------

### Initialize Valkey Client with OpenTelemetry

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyotel

Demonstrates creating a client with OpenTelemetry enabled and using the Labeler to add custom attributes to cache metrics.

```go
package main

import (
    "context"
    "time"

    "github.com/valkey-io/valkey-go"
    "github.com/valkey-io/valkey-go/valkeyotel"
    "go.opentelemetry.io/otel/attribute"
)

func main() {
    client, err := valkeyotel.NewClient(valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
    if err != nil {
        panic(err)
    }
    defer client.Close()

    // Basic usage
    ctx := context.Background()
    client.DoCache(ctx, client.B().Get().Key("mykey").Cache(), time.Minute)

    // Add custom labels to cache metrics using Labeler
    // Check if labeler exists in context, create new context only if needed
    bookLabeler, ok := valkeyotel.LabelerFromContext(ctx)
    if !ok {
        ctx = valkeyotel.ContextWithLabeler(ctx, bookLabeler)
    }
    bookLabeler.Add(attribute.String("key_pattern", "book"))
    client.DoCache(ctx, client.B().Get().Key("book:123").Cache(), time.Minute)

    // Track with multiple attributes
    authorLabeler, ok := valkeyotel.LabelerFromContext(ctx)
    if !ok {
        ctx = valkeyotel.ContextWithLabeler(ctx, authorLabeler)
    }
    authorLabeler.Add(
        attribute.String("key_pattern", "author"),
        attribute.String("tenant", "acme"),
    )
    client.DoCache(ctx, client.B().Get().Key("author:456").Cache(), time.Minute)
}
```

--------------------------------

### HGetEX

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets fields from a hash and sets their expiration.

```go
func (c *Compat) HGetEX(ctx context.Context, key string, fields ...string) *StringSliceCmd
```

--------------------------------

### Initialize New Client

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

NewClient initializes a client for either cluster or standalone mode based on the provided ClientOption.

```go
func NewClient(option ClientOption) (client Client, err error)
```

--------------------------------

### Initialize OM Repository

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/om

Demonstrates defining a struct with Valkey tags and initializing a repository using NewHashRepository.

```go
package main

import (
    "context"
    "fmt"
    "time"

    "github.com/valkey-io/valkey-go"
    "github.com/valkey-io/valkey-go/om"
)

type Example struct {
    Key  string    `json:"key" valkey:",key"`   // the valkey:",key" is required to indicate which field is the ULID key
    Ver  int64     `json:"ver" valkey:",ver"`   // the valkey:",ver" is optional for optimistic locking to prevent lost update
    ExAt time.Time `json:"exat" valkey:",exat"` // the valkey:",exat" is optional for setting record expiry with unix timestamp
    Str  string    `json:"str"`                // both NewHashRepository and NewJSONRepository use json tag as field name
}

func main() {
    ctx := context.Background()
    c, err := valkey.NewClient(valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
    if err != nil {
        panic(err)
    }
    // create the repo with NewHashRepository or NewJSONRepository
    repo := om.NewHashRepository("my_prefix", Example{}, c)

    exp := repo.NewEntity()
    exp.Str = "mystr"
    exp.ExAt = time.Now().Add(time.Hour)
    fmt.Println(exp.Key) // output 01FNH4FCXV9JTB9WTVFAAKGSYB
    repo.Save(ctx, exp) // success

    // lookup "my_prefix:01FNH4FCXV9JTB9WTVFAAKGSYB" through client side caching
    exp2, _ := repo.FetchCache(ctx, exp.Key, time.Second*5)
    fmt.Println(exp2.Str) // output "mystr", which is equal to exp.Str

    exp2.Ver = 0         // if someone changes the version during your GET then SET operation,
    repo.Save(ctx, exp2) // the save will fail with ErrVersionMismatch.
}
```

--------------------------------

### HExpireTime

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets the expiration time of hash fields.

```go
func (c *Compat) HExpireTime(ctx context.Context, key string, fields ...string) *IntSliceCmd
```

--------------------------------

### ZRandMember Operations

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets random members from a sorted set.

```go
func (c *Pipeline) ZRandMember(ctx context.Context, key string, count int64) *StringSliceCmd
```

```go
func (c *Pipeline) ZRandMemberWithScores(ctx context.Context, key string, count int64) *ZSliceCmd
```

--------------------------------

### Create Index

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Initializes a new index with specified options and schema.

```go
func (c *Compat) FTCreate(ctx context.Context, index string, options *FTCreateOptions, schema ...*FieldSchema) *StatusCmd
```

--------------------------------

### ZMScore

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets the scores of multiple members in a sorted set.

```go
func (c *Pipeline) ZMScore(ctx context.Context, key string, members ...string) *FloatSliceCmd
```

--------------------------------

### Initialize and use a Bloom Filter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyprob

Demonstrates creating a Bloom filter, adding elements, and checking for their existence.

```go
package main

import (
	"context"
	"fmt"

	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeyprob"
)

func main() {
	client, err := valkey.NewClient(valkey.ClientOption{
		InitAddress: []string{"localhost:6379"},
	})
	if err != nil {
		panic(err)
	}

	bf, err := valkeyprob.NewBloomFilter(client, "bloom_filter", 1000, 0.01)

	err = bf.Add(context.Background(), "hello")
	if err != nil {
		panic(err)
	}

	err = bf.Add(context.Background(), "world")
	if err != nil {
		panic(err)
	}

	exists, err := bf.Exists(context.Background(), "hello")
	if err != nil {
		panic(err)
	}
	fmt.Println(exists) // true

	exists, err = bf.Exists(context.Background(), "world")
	if err != nil {
		panic(err)
	}
	fmt.Println(exists) // true
}
```

--------------------------------

### HPExpireTime

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets the expiration time of hash fields in milliseconds.

```go
func (c *Compat) HPExpireTime(ctx context.Context, key string, fields ...string) *IntSliceCmd
```

--------------------------------

### Configuration Methods

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for managing Valkey server configuration.

```go
func (c *Compat) ConfigGet(ctx context.Context, parameter string) *StringStringMapCmd
```

```go
func (c *Compat) ConfigResetStat(ctx context.Context) *StatusCmd
```

```go
func (c *Compat) ConfigRewrite(ctx context.Context) *StatusCmd
```

```go
func (c *Compat) ConfigSet(ctx context.Context, parameter, value string) *StatusCmd
```

--------------------------------

### HGetEXWithArgs

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Gets fields from a hash and sets their expiration with options.

```go
func (c *Compat) HGetEXWithArgs(ctx context.Context, key string, options *HGetEXOptions, fields ...string) *StringSliceCmd
```

--------------------------------

### Get Configuration

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Retrieves a RediSearch configuration parameter value.

```go
func (c *Compat) FTConfigGet(ctx context.Context, option string) *MapMapStringInterfaceCmd
```

--------------------------------

### Command and Configuration Pipeline Methods

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for retrieving command information and managing server configuration.

```go
func (c *Pipeline) Command(ctx context.Context) *CommandsInfoCmd
```

```go
func (c *Pipeline) CommandGetKeys(ctx context.Context, commands ...any) *StringSliceCmd
```

```go
func (c *Pipeline) CommandGetKeysAndFlags(ctx context.Context, commands ...any) *KeyFlagsCmd
```

```go
func (c *Pipeline) CommandList(ctx context.Context, filter FilterBy) *StringSliceCmd
```

```go
func (c *Pipeline) ConfigGet(ctx context.Context, parameter string) *StringStringMapCmd
```

```go
func (c *Pipeline) ConfigResetStat(ctx context.Context) *StatusCmd
```

```go
func (c *Pipeline) ConfigRewrite(ctx context.Context) *StatusCmd
```

```go
func (c *Pipeline) ConfigSet(ctx context.Context, parameter, value string) *StatusCmd
```

--------------------------------

### Instantiate Valkey Client

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Create a new client instance using various connection options such as standalone, cluster, sentinel, or unix sockets.

```go
// Connect to a single valkey node:
client, err := valkey.NewClient(valkey.ClientOption{
    InitAddress: []string{"127.0.0.1:6379"},
})

// Connect to a standalone valkey with replicas
client, err := valkey.NewClient(valkey.ClientOption{
    InitAddress: []string{"127.0.0.1:6379"},
    Standalone: valkey.StandaloneOption{
        // Note that these addresses must be online and cannot be promoted.
        // An example use case is the reader endpoint provided by cloud vendors.
        ReplicaAddress: []string{"reader_endpoint:port"},
    },
    SendToReplicas: func(cmd valkey.Completed) bool {
        return cmd.IsReadOnly()
    },
})

// Connect to a valkey cluster
client, err := valkey.NewClient(valkey.ClientOption{
    InitAddress: []string{"127.0.0.1:7001", "127.0.0.1:7002", "127.0.0.1:7003"},
    ShuffleInit: true,
})

// Connect to a valkey cluster and use replicas for read operations
client, err := valkey.NewClient(valkey.ClientOption{
    InitAddress: []string{"127.0.0.1:7001", "127.0.0.1:7002", "127.0.0.1:7003"},
    SendToReplicas: func(cmd valkey.Completed) bool {
        return cmd.IsReadOnly()
    },
})

// Connect to sentinels
client, err := valkey.NewClient(valkey.ClientOption{
    InitAddress: []string{"127.0.0.1:26379", "127.0.0.1:26380", "127.0.0.1:26381"},
    Sentinel: valkey.SentinelOption{
        MasterSet: "my_master",
    },
})
// connect to valkey node through unix socket
client, err := valkey.NewClient(valkey.ClientOption{
    InitAddress: []string{"/run/valkey.sock"},
    DialCtxFn: func(ctx context.Context, s string, d *net.Dialer, c *tls.Config) (conn net.Conn, err error) {
        return d.DialContext(ctx, "unix", s)
    },
})
```

--------------------------------

### Get string representation

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Returns the human-readable representation of ValkeyMessage.

```go
func (m *ValkeyMessage) String() string
```

--------------------------------

### Initialize and Use a Valkey Locker

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go%40v1.0.76/valkeylock

Demonstrates creating a new locker instance and acquiring a lock using WithContext. Ensure the locker is closed after use to release resources.

```go
package main

import (
	"context"
	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeylock"
)

func main() {
	locker, err := valkeylock.NewLocker(valkeylock.LockerOption{
		ClientOption:   valkey.ClientOption{InitAddress: []string{"localhost:6379"}},
		KeyMajority:    1,    // Use KeyMajority=1 if you have only one Valkey instance. Also make sure that all your `Locker`s share the same KeyMajority.
		NoLoopTracking: true, // Enable this to have better performance if all your Valkey are >= 7.0.5.
	})
	if err != nil {
		panic(err)
	}
	defer locker.Close()

	// acquire the lock "my_lock"
	ctx, cancel, err := locker.WithContext(context.Background(), "my_lock")
	if err != nil {
		panic(err)
	}

	// "my_lock" is acquired. use the ctx as normal.
	doSomething(ctx)

	// invoke cancel() to release the lock.
	cancel()
}
```

--------------------------------

### Get Time-Series Information

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Returns metadata and information about a time-series key.

```go
func (c *Compat) TSInfo(ctx context.Context, key string) *MapStringInterfaceCmd
```

```go
func (c *Compat) TSInfoWithArgs(ctx context.Context, key string, options *TSInfoOptions) *MapStringInterfaceCmd
```

--------------------------------

### JSON Get and Set Operations

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for retrieving and updating JSON documents.

```go
func (c *Compat) JSONGet(ctx context.Context, key string, paths ...string) *JSONCmd
```

```go
func (c *Compat) JSONGetWithArgs(ctx context.Context, key string, options *JSONGetArgs, paths ...string) *JSONCmd
```

```go
func (c *Compat) JSONMGet(ctx context.Context, path string, keys ...string) *JSONSliceCmd
```

```go
func (c *Compat) JSONMSet(ctx context.Context, params ...interface{}) *StatusCmd
```

```go
func (c *Compat) JSONMSetArgs(ctx context.Context, docs []JSONSetArgs) *StatusCmd
```

```go
func (c *Compat) JSONSet(ctx context.Context, key, path string, value interface{}) *StatusCmd
```

```go
func (c *Compat) JSONSetMode(ctx context.Context, key, path string, value interface{}, mode string) *StatusCmd
```

--------------------------------

### Get Index Information

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Retrieves metadata and status information for a specified index.

```go
func (c *Compat) FTInfo(ctx context.Context, index string) *FTInfoCmd
```

--------------------------------

### Initialize a JSON Repository

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/om

Creates a new JSON repository with a specified key prefix and schema. The schema must be a struct with fields tagged with valkey:",key".

```go
func NewJSONRepository[T any](prefix string, schema T, client valkey.Client, opts ...RepositoryOption) Repository[T]
```

--------------------------------

### Get required cache buffer size

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Returns the buffer size needed by the CacheMarshal.

```go
func (m *ValkeyMessage) CacheSize() int
```

--------------------------------

### Pipeline

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Creates a new pipeline.

```go
func (c *Compat) Pipeline() Pipeliner
```

--------------------------------

### Get Pipeline Methods

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for retrieving values and performing bit/range operations within a pipeline.

```go
func (c *Pipeline) Get(ctx context.Context, key string) *StringCmd
```

```go
func (c *Pipeline) GetBit(ctx context.Context, key string, offset int64) *IntCmd
```

```go
func (c *Pipeline) GetDel(ctx context.Context, key string) *StringCmd
```

```go
func (c *Pipeline) GetEx(ctx context.Context, key string, expiration time.Duration) *StringCmd
```

```go
func (c *Pipeline) GetRange(ctx context.Context, key string, start, end int64) *StringCmd
```

```go
func (c *Pipeline) GetSet(ctx context.Context, key string, value any) *StringCmd
```

--------------------------------

### Get Time-Series Sample

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Retrieves the last sample of a time-series key, optionally with additional arguments.

```go
func (c *Compat) TSGet(ctx context.Context, key string) *TSTimestampValueCmd
```

```go
func (c *Compat) TSGetWithArgs(ctx context.Context, key string, options *TSGetOptions) *TSTimestampValueCmd
```

--------------------------------

### Mock client.Do operations

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/mock

Demonstrates how to use mock.Match and mock.Result to simulate Do and DoMulti command responses in a test environment.

```go
package main

import (
	"context"
	"testing"

	"go.uber.org/mock/gomock"
	"github.com/valkey-io/valkey-go/mock"
)

func TestWithValkey(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()

	ctx := context.Background()
	client := mock.NewClient(ctrl)

	client.EXPECT().Do(ctx, mock.Match("GET", "key")).Return(mock.Result(mock.ValkeyString("val")))
	if v, _ := client.Do(ctx, client.B().Get().Key("key").Build()).ToString(); v != "val" {
		t.Fatalf("unexpected val %v", v)
	}
	client.EXPECT().DoMulti(ctx, mock.Match("GET", "c"), mock.Match("GET", "d")).Return([]valkey.ValkeyResult{
		mock.Result(mock.ValkeyNil()),
		mock.Result(mock.ValkeyNil()),
	})
	for _, resp := range client.DoMulti(ctx, client.B().Get().Key("c").Build(), client.B().Get().Key("d").Build()) {
		if err := resp.Error(); !valkey.IsValkeyNil(err) {
			t.Fatalf("unexpected err %v", err)
		}
	}
}
```

--------------------------------

### Get client-side cache TTL

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Returns the remaining TTL in seconds of client side cache.

```go
func (m *ValkeyMessage) CacheTTL() (ttl int64)
```

--------------------------------

### Create a new RateLimiter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeylimiter

Initialization of the rate limiter with specific options.

```go
limiter, err := valkeylimiter.NewRateLimiter(valkeylimiter.RateLimiterOption{
	ClientOption: valkey.ClientOption{InitAddress: []string{"localhost:6379"}},
	KeyPrefix:    "api_rate_limit",
	Limit:        5,
	Window:       time.Second,
})
```

--------------------------------

### Get client-side cache PXAT

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Returns the remaining PXAT in seconds of client side cache.

```go
func (m *ValkeyMessage) CachePXAT() int64
```

--------------------------------

### Explain Query Execution

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Retrieves the execution plan for a query, with optional configuration arguments.

```go
func (c *Compat) FTExplain(ctx context.Context, index string, query string) *StringCmd
```

```go
func (c *Compat) FTExplainWithArgs(ctx context.Context, index string, query string, options *FTExplainOptions) *StringCmd
```

--------------------------------

### Get client-side cache PTTL

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Returns the remaining PTTL in seconds of client side cache.

```go
func (m *ValkeyMessage) CachePTTL() int64
```

--------------------------------

### FTExplainOptions Struct

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Options for the FT.EXPLAIN command.

```go
type FTExplainOptions struct {
	Dialect string
}
```

--------------------------------

### Implement and Apply a Custom Hook

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyhook

Demonstrates implementing the Hook interface to intercept client commands and applying it using valkeyhook.WithHook.

```go
package main

import (
	"context"
	"time"

	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeyhook"
)

type hook struct{}

func (h *hook) Do(client valkey.Client, ctx context.Context, cmd valkey.Completed) (resp valkey.ValkeyResult) {
	// do whatever you want before a client.Do
	resp = client.Do(ctx, cmd)
	// do whatever you want after a client.Do
	return
}

func (h *hook) DoMulti(client valkey.Client, ctx context.Context, multi ...valkey.Completed) (resps []valkey.ValkeyResult) {
	// do whatever you want before a client.DoMulti
	resps = client.DoMulti(ctx, multi...)
	// do whatever you want after a client.DoMulti
	return
}

func (h *hook) DoCache(client valkey.Client, ctx context.Context, cmd valkey.Cacheable, ttl time.Duration) (resp valkey.ValkeyResult) {
	// do whatever you want before a client.DoCache
	resp = client.DoCache(ctx, cmd, ttl)
	// do whatever you want after a client.DoCache
	return
}

func (h *hook) DoMultiCache(client valkey.Client, ctx context.Context, multi ...valkey.CacheableTTL) (resps []valkey.ValkeyResult) {
	// do whatever you want before a client.DoMultiCache
	resps = client.DoMultiCache(ctx, multi...)
	// do whatever you want after a client.DoMultiCache
	return
}

func (h *hook) Receive(client valkey.Client, ctx context.Context, subscribe valkey.Completed, fn func(msg valkey.PubSubMessage)) (err error) {
	// do whatever you want before a client.Receive
	err = client.Receive(ctx, subscribe, fn)
	// do whatever you want after a client.Receive
	return
}

func main() {
	client, err := valkey.NewClient(valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
	if err != nil {
		panic(err)
	}
	client = valkeyhook.WithHook(client, &hook{})
	defer client.Close()
}
```

--------------------------------

### Get Multiple Time-Series Samples

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Returns the last sample of multiple time-series keys based on filters.

```go
func (c *Compat) TSMGet(ctx context.Context, filters []string) *MapStringSliceInterfaceCmd
```

```go
func (c *Compat) TSMGetWithArgs(ctx context.Context, filters []string, options *TSMGetOptions) *MapStringSliceInterfaceCmd
```

--------------------------------

### Pipelining with valkeycompat

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Execute multiple commands in a single network round-trip using the Pipelined method.

```go
package main

import (
	"context"
	"fmt"
	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeycompat"
)

func main() {
	ctx := context.Background()
	client, err := valkey.NewClient(valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
	if err != nil {
		panic(err)
	}
	defer client.Close()

	rdb := valkeycompat.NewAdapter(client)
	cmds, err := rdb.Pipelined(ctx, func(pipe valkeycompat.Pipeliner) error {
		for i := 0; i < 100; i++ {
			pipe.Set(ctx, fmt.Sprintf("key%d", i), i, 0)
			pipe.Get(ctx, fmt.Sprintf("key%d", i))
		}
		return nil
	})
	if err != nil {
		panic(err)
	}
	for _, cmd := range cmds {
		fmt.Println(cmd.(*valkeycompat.StringCmd).Val())
	}
}
```

--------------------------------

### Client Configuration Options

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyaside

Configuration struct for customizing the cache-aside client behavior.

```go
type ClientOption struct {
	// ClientBuilder can be used to modify valkey.Client used by Locker
	ClientBuilder func(option valkey.ClientOption) (valkey.Client, error)
	ClientOption  valkey.ClientOption
	ClientTTL     time.Duration // TTL for the client marker, refreshed every 1/2 TTL. Defaults to 10s. The marker allows other clients to know if this client is still alive.
	UseLuaLock    bool
}
```

--------------------------------

### CacheAsideClient Interface

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyaside

Defines the core methods for cache-aside operations including Get, Del, and client management.

```go
type CacheAsideClient interface {
	Get(ctx context.Context, ttl time.Duration, key string, fn func(ctx context.Context, key string) (val string, err error)) (val string, err error)
	Del(ctx context.Context, key string) error
	Client() valkey.Client
	Close()
}
```

--------------------------------

### Initialize CacheAsideClient

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyaside

Creates a new instance of the cache-aside client.

```go
func NewClient(option ClientOption) (cc CacheAsideClient, err error)
```

--------------------------------

### Initialize NewAdapter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompatmock

Creates a new mock adapter instance from a mock client.

```go
func NewAdapter(m *mock.Client) *ClientMock
```

--------------------------------

### FTCreateOptions Struct

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Configuration options for creating a search index in Valkey.

```go
type FTCreateOptions struct {
	Filter          string
	DefaultLanguage string
	LanguageField   string
	ScoreField      string
	PayloadField    string
	Prefix          []any
	StopWords       []any
	Score           float64
	MaxTextFields   int
	Temporary       int
	OnHash          bool
	OnJSON          bool
	NoOffsets       bool
	NoHL            bool
	NoFields        bool
	NoFreqs         bool
	SkipInitialScan bool
}
```

--------------------------------

### Batch key operations

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Helper functions for performing multi-key operations like delete, get, set, and set-if-not-exists.

```go
func MDel(client Client, ctx context.Context, keys []string) map[string]error
```

```go
func MGet(client Client, ctx context.Context, keys []string) (ret map[string]ValkeyMessage, err error)
```

```go
func MGetCache(client Client, ctx context.Context, ttl time.Duration, keys []string) (ret map[string]ValkeyMessage, err error)
```

```go
func MSet(client Client, ctx context.Context, kvs map[string]string) map[string]error
```

```go
func MSetNX(client Client, ctx context.Context, kvs map[string]string) map[string]error
```

--------------------------------

### Initialize and use a Counting Bloom Filter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyprob

Shows how to use a Counting Bloom Filter to add, check, count, and remove elements.

```go
package main

    import (
        "context"
        "fmt"

        "github.com/valkey-io/valkey-go"
        "github.com/valkey-io/valkey-go/valkeyprob"
    )

    func main() {
        client, err := valkey.NewClient(valkey.ClientOption{
            InitAddress: []string{"localhost:6379"},
        })
        if err != nil {
            panic(err)
        }

        cbf, err := valkeyprob.NewCountingBloomFilter(client, "counting_bloom_filter", 1000, 0.01)

        err = cbf.Add(context.Background(), "hello")
        if err != nil {
            panic(err)
        }

        err = cbf.Add(context.Background(), "world")
        if err != nil {
            panic(err)
        }

        exists, err := cbf.Exists(context.Background(), "hello")
        if err != nil {
            panic(err)
        }
        fmt.Println(exists) // true

        exists, err = cbf.Exists(context.Background(), "world")
        if err != nil {
            panic(err)
        }
        fmt.Println(exists) // true

        count, err := cbf.Count(context.Background())
        if err != nil {
            panic(err)
        }
        fmt.Println(count) // 2

        err = cbf.Remove(context.Background(), "hello")
        if err != nil {
            panic(err)
        }

        exists, err = cbf.Exists(context.Background(), "hello")
        if err != nil {
            panic(err)
        }
        fmt.Println(exists) // false

        count, err = cbf.Count(context.Background())
        if err != nil {
            panic(err)
        }
        fmt.Println(count) // 1
    }
```

--------------------------------

### Initialize and use a Sliding Window Bloom Filter

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeyprob

Demonstrates using a Sliding Window Bloom Filter to track items over a specific time duration.

```go
package main

import (
	"context"
	"fmt"
	"time"

	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeyprob"
)

func main() {
	client, err := valkey.NewClient(valkey.ClientOption{
		InitAddress: []string{"localhost:6379"},
	})
	if err != nil {
		panic(err)
	}

	sbf, err := NewSlidingBloomFilter(client, "sliding_bloom_filter", 1000, 0.01, time.Minute)

	err = sbf.Add(context.Background(), "hello")
	if err != nil {
		panic(err)
	}

	err = sbf.Add(context.Background(), "world")
	if err != nil {
		panic(err)
	}

	exists, err := sbf.Exists(context.Background(), "hello")
	if err != nil {
		panic(err)
	}
	fmt.Println(exists) // true

	exists, err = sbf.Exists(context.Background(), "world")
	if err != nil {
		panic(err)
	}
	fmt.Println(exists) // true

	count, err := sbf.Count(context.Background())
	if err != nil {
		panic(err)
	}
	fmt.Println(count) // 2
}
```

--------------------------------

### Pipeline Server and Key Management

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for server status, key metadata, and data migration.

```go
func (c *Pipeline) LastSave(ctx context.Context) *IntCmd
```

```go
func (c *Pipeline) MemoryUsage(ctx context.Context, key string, samples ...int64) *IntCmd
```

```go
func (c *Pipeline) Migrate(ctx context.Context, host string, port int64, key string, db int64, timeout time.Duration) *StatusCmd
```

```go
func (c *Pipeline) Move(ctx context.Context, key string, db int64) *BoolCmd
```

```go
func (c *Pipeline) ObjectEncoding(ctx context.Context, key string) *StringCmd
```

```go
func (c *Pipeline) ObjectIdleTime(ctx context.Context, key string) *DurationCmd
```

```go
func (c *Pipeline) ObjectRefCount(ctx context.Context, key string) *IntCmd
```

```go
func (c *Pipeline) Ping(ctx context.Context) *StatusCmd
```

```go
func (c *Pipeline) Quit(ctx context.Context) *StatusCmd
```

--------------------------------

### Benchmark Auto Pipelining

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Demonstrates how concurrent client.Do calls from multiple goroutines are automatically pipelined.

```go
func BenchmarkPipelining(b *testing.B, client valkey.Client) {
  // the below client.Do() operations will be issued from
  // multiple goroutines and thus will be pipelined automatically.
  b.RunParallel(func(pb *testing.PB) {
    for pb.Next() {
      client.Do(context.Background(), client.B().Get().Key("k").Build()).ToString()
    }
  })
}
```

--------------------------------

### func MGet(client Client, ctx context.Context, keys []string) (ret map[string]ValkeyMessage, err error)

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Consults Valkey directly with multiple keys by grouping them into MGET or multiple GETs.

```APIDOC
## func MGet(client Client, ctx context.Context, keys []string) (ret map[string]ValkeyMessage, err error)

### Description
Consults the valkey directly with multiple keys by grouping keys within the same slot into MGET or multiple GETs.
```

--------------------------------

### NewHashRepository constructor

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/om

Initializes a new HashRepository with a specific prefix and schema.

```go
func NewHashRepository[T any](prefix string, schema T, client valkey.Client, opts ...RepositoryOption) Repository[T]
```

--------------------------------

### func MGetCache(client Client, ctx context.Context, ttl time.Duration, keys []string) (ret map[string]ValkeyMessage, err error)

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go

Consults client-side caches with multiple keys by grouping them into multiple GETs.

```APIDOC
## func MGetCache(client Client, ctx context.Context, ttl time.Duration, keys []string) (ret map[string]ValkeyMessage, err error)

### Description
Consults the client-side caches with multiple keys by grouping keys within the same slot into multiple GETs.
```

--------------------------------

### Server Management Commands

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Methods for background server operations.

```go
func (c *Compat) BgRewriteAOF(ctx context.Context) *StatusCmd
```

```go
func (c *Compat) BgSave(ctx context.Context) *StatusCmd
```

--------------------------------

### PubSub with valkeycompat

Source: https://pkg.go.dev/github.com/valkey-io/valkey-go/valkeycompat

Subscribe to channels and receive messages using the PubSub interface.

```go
package main

import (
	"context"
	"fmt"
	"github.com/valkey-io/valkey-go"
	"github.com/valkey-io/valkey-go/valkeycompat"
	"strconv"
)

func main() {
	ctx := context.Background()
	client, err := valkey.NewClient(valkey.ClientOption{InitAddress: []string{"127.0.0.1:6379"}})
	if err != nil {
		panic(err)
	}
	defer client.Close()

	rdb := valkeycompat.NewAdapter(client)
	pubsub := rdb.Subscribe(ctx, "mychannel1")
	defer pubsub.Close()

	go func() {
		for i := 0; ; i++ {
			if err := rdb.Publish(ctx, "mychannel1", strconv.Itoa(i)).Err(); err != nil {
				panic(err)
			}
		}
	}()
	for {
		msg, err := pubsub.ReceiveMessage(ctx)
		if err != nil {
			panic(err)
		}
		fmt.Println(msg.Channel, msg.Payload)
	}
}
```