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package gocache
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/go-redis/redis/v8"
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"time"
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)
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// RedisConfig 配置
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type RedisConfig struct {
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Addr string // 地址,可选
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Password string // 密码,可选
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DbName int // 数据库,可选
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DefaultExpiration time.Duration // 默认过期时间
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Db *redis.Client // 驱动,可选
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}
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// Redis https://github.com/go-redis/redis
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type Redis struct {
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RedisConfig
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db *redis.Client // 驱动
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ctx context.Context // 上下文内容
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}
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// NewRedis 实例化
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func NewRedis(config *RedisConfig) *Redis {
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app := &Redis{}
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app.DefaultExpiration = config.DefaultExpiration
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app.ctx = context.Background()
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if config.Addr == "" {
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app.db = config.Db
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return app
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} else {
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app.db = redis.NewClient(&redis.Options{
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Addr: config.Addr, // 地址
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Password: config.Password, // 密码
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DB: config.DbName, // 数据库
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PoolSize: 100, // 连接池大小
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})
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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_, err := app.db.Ping(ctx).Result()
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if err != nil {
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panic(errors.New(fmt.Sprintf("连接失败,%s", err.Error())))
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}
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return app
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}
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}
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// Set 设置一个key的值
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func (r *Redis) Set(key string, value interface{}, expiration time.Duration) (string, error) {
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return r.db.Set(r.ctx, key, value, expiration).Result()
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}
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// SetInterface 设置一个key的值
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func (r *Redis) SetInterface(key string, value interface{}, expiration time.Duration) (string, error) {
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marshal, _ := json.Marshal(value)
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return r.db.Set(r.ctx, key, marshal, expiration).Result()
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}
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// SetDefaultExpiration 设置一个key的值,使用全局默认过期时间
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func (r *Redis) SetDefaultExpiration(key string, value interface{}) (string, error) {
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return r.db.Set(r.ctx, key, value, r.DefaultExpiration).Result()
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}
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// SetInterfaceDefaultExpiration 设置一个key的值,使用全局默认过期时间
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func (r *Redis) SetInterfaceDefaultExpiration(key string, value interface{}) (string, error) {
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marshal, _ := json.Marshal(value)
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return r.db.Set(r.ctx, key, marshal, r.DefaultExpiration).Result()
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}
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// Get 查询key的值
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func (r *Redis) Get(key string) (string, error) {
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return r.db.Get(r.ctx, key).Result()
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}
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// GetInterface 查询key的值
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func (r *Redis) GetInterface(key string, result interface{}) error {
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ret, err := r.db.Get(r.ctx, key).Result()
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if err != nil {
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return err
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}
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err = json.Unmarshal([]byte(ret), result)
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return nil
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}
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// GetSet 设置一个key的值,并返回这个key的旧值
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func (r *Redis) GetSet(key string, value interface{}) (string, error) {
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return r.db.GetSet(r.ctx, key, value).Result()
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}
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// SetNX 如果key不存在,则设置这个key的值
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func (r *Redis) SetNX(key string, value interface{}, expiration time.Duration) error {
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return r.db.SetNX(r.ctx, key, value, expiration).Err()
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}
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// SetNXDefaultExpiration 如果key不存在,则设置这个key的值,使用全局默认过期时间
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func (r *Redis) SetNXDefaultExpiration(key string, value interface{}) error {
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return r.db.SetNX(r.ctx, key, value, r.DefaultExpiration).Err()
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}
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// MGet 批量查询key的值
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func (r *Redis) MGet(keys ...string) ([]interface{}, error) {
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return r.db.MGet(r.ctx, keys...).Result()
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}
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// MSet 批量设置key的值
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// MSet(map[string]interface{}{"key1": "value1", "key2": "value2"})
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func (r *Redis) MSet(values map[string]interface{}) error {
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return r.db.MSet(r.ctx, values).Err()
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}
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// Incr 针对一个key的数值进行递增操作
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func (r *Redis) Incr(key string) (int64, error) {
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return r.db.Incr(r.ctx, key).Result()
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}
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// IncrBy 针对一个key的数值进行递增操作,指定每次递增多少
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func (r *Redis) IncrBy(key string, value int64) (int64, error) {
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return r.db.IncrBy(r.ctx, key, value).Result()
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}
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// Decr 针对一个key的数值进行递减操作
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func (r *Redis) Decr(key string) (int64, error) {
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return r.db.Decr(r.ctx, key).Result()
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}
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// DecrBy 针对一个key的数值进行递减操作,指定每次递减多少
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func (r *Redis) DecrBy(key string, value int64) (int64, error) {
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return r.db.DecrBy(r.ctx, key, value).Result()
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}
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// Del 删除key操作,支持批量删除
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func (r *Redis) Del(keys ...string) error {
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return r.db.Del(r.ctx, keys...).Err()
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}
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