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66 lines
1.6 KiB
66 lines
1.6 KiB
package redis
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import (
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"context"
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"crypto/sha1"
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"encoding/hex"
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"io"
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"strings"
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)
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type Scripter interface {
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Eval(ctx context.Context, script string, keys []string, args ...interface{}) *Cmd
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EvalSha(ctx context.Context, sha1 string, keys []string, args ...interface{}) *Cmd
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ScriptExists(ctx context.Context, hashes ...string) *BoolSliceCmd
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ScriptLoad(ctx context.Context, script string) *StringCmd
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}
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var (
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_ Scripter = (*Client)(nil)
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_ Scripter = (*Ring)(nil)
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_ Scripter = (*ClusterClient)(nil)
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)
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type Script struct {
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src, hash string
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}
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func NewScript(src string) *Script {
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h := sha1.New()
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_, _ = io.WriteString(h, src)
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return &Script{
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src: src,
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hash: hex.EncodeToString(h.Sum(nil)),
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}
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}
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func (s *Script) Hash() string {
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return s.hash
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}
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func (s *Script) Load(ctx context.Context, c Scripter) *StringCmd {
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return c.ScriptLoad(ctx, s.src)
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}
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func (s *Script) Exists(ctx context.Context, c Scripter) *BoolSliceCmd {
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return c.ScriptExists(ctx, s.hash)
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}
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func (s *Script) Eval(ctx context.Context, c Scripter, keys []string, args ...interface{}) *Cmd {
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return c.Eval(ctx, s.src, keys, args...)
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}
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func (s *Script) EvalSha(ctx context.Context, c Scripter, keys []string, args ...interface{}) *Cmd {
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return c.EvalSha(ctx, s.hash, keys, args...)
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}
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// Run optimistically uses EVALSHA to run the script. If script does not exist
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// it is retried using EVAL.
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func (s *Script) Run(ctx context.Context, c Scripter, keys []string, args ...interface{}) *Cmd {
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r := s.EvalSha(ctx, c, keys, args...)
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if err := r.Err(); err != nil && strings.HasPrefix(err.Error(), "NOSCRIPT ") {
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return s.Eval(ctx, c, keys, args...)
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}
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return r
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}
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