/
get.go
77 lines (61 loc) · 1.76 KB
/
get.go
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package redis // import "github.com/SolomonAIEngineering/backend-core-library/database/redis"
import (
"context"
"fmt"
"github.com/gomodule/redigo/redis"
)
// Get reads a value from the cache
func (c *Client) Get(ctx context.Context, key string) ([]byte, error) {
txn := c.telemetrySdk.GetTraceFromContext(ctx)
span := c.telemetrySdk.StartRedisDatastoreSegment(txn, RedisReadFromCacheTxn.String())
defer span.End()
// validate the key
if key == "" {
return nil, fmt.Errorf("empty key")
}
conn := c.pool.Get()
defer conn.Close()
value, err := redis.String(conn.Do("GET", key))
if err != nil {
return nil, err
}
return []byte(value), nil
}
// GetManyFromCache reads a value from the cache
func (c *Client) GetMany(ctx context.Context, keys []string) ([][]byte, error) {
txn := c.telemetrySdk.GetTraceFromContext(ctx)
span := c.telemetrySdk.StartRedisDatastoreSegment(txn, RedisReadManyFromCacheTxn.String())
defer span.End()
// validate the key
if len(keys) == 0 {
return nil, fmt.Errorf("empty key")
}
conn := c.pool.Get()
defer conn.Close()
var ifaceSlice []interface{}
for _, s := range keys {
ifaceSlice = append(ifaceSlice, s)
}
values, err := redis.ByteSlices(conn.Do("MGET", ifaceSlice...))
if err != nil {
return nil, err
}
return values, nil
}
// Get reads a value from the cache
func (c *Client) Exists(ctx context.Context, key string) (bool, error) {
txn := c.telemetrySdk.GetTraceFromContext(ctx)
span := c.telemetrySdk.StartRedisDatastoreSegment(txn, RedisReadFromCacheTxn.String())
defer span.End()
// validate the key
if key == "" {
return false, fmt.Errorf("empty key")
}
conn := c.pool.Get()
defer conn.Close()
value, err := redis.Bool(conn.Do("EXISTS", key))
if err != nil {
return false, err
}
return value, nil
}