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65 lines
1.6 KiB
65 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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