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Merge pull request #59 from rebuy-de/add-redisutil
CLOUD-2354 add redisutil
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| package redisutil | ||
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| import ( | ||
| "context" | ||
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| "github.com/go-redis/redis/v8" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
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| type RedisIndexer interface { | ||
| SMembers(ctx context.Context, key string) *redis.StringSliceCmd | ||
| MGet(ctx context.Context, keys ...string) *redis.SliceCmd | ||
| SRem(ctx context.Context, key string, members ...interface{}) *redis.IntCmd | ||
| } | ||
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| func IndexVacuum(ctx context.Context, c RedisIndexer, indexKey string, dataKeyPrefix Prefix) error { | ||
| ids, err := c.SMembers(ctx, indexKey).Result() | ||
| if err != nil { | ||
| return errors.Wrap(err, "failed to get ids") | ||
| } | ||
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| keys := dataKeyPrefix.Keys(ids) | ||
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| values, err := c.MGet(ctx, keys...).Result() | ||
| if err != nil { | ||
| return errors.Wrap(err, "failed to retrieve values") | ||
| } | ||
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| expired := []interface{}{} | ||
| for k, value := range values { | ||
| key := keys[k] | ||
| if value == nil { | ||
| expired = append(expired, key) | ||
| } | ||
| } | ||
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| err = c.SRem(ctx, indexKey, expired...).Err() | ||
| return errors.Wrap(err, "failed to delete expired keys") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| package redisutil | ||
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| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "time" | ||
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| "github.com/go-redis/redis/v8" | ||
| ) | ||
|
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| type RedisGetter interface { | ||
| Get(context.Context, string) *redis.StringCmd | ||
| } | ||
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| func JSONGet(ctx context.Context, c RedisGetter, key string, v interface{}) error { | ||
| payload, err := c.Get(ctx, key).Result() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| return json.Unmarshal([]byte(payload), v) | ||
| } | ||
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| type RedisSetter interface { | ||
| Set(context.Context, string, interface{}, time.Duration) *redis.StatusCmd | ||
| } | ||
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| func JSONSet(ctx context.Context, c RedisSetter, key string, v interface{}, expiration time.Duration) error { | ||
| payload, err := json.Marshal(v) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| return c.Set(ctx, key, string(payload), expiration).Err() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| package redisutil | ||
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| import "path" | ||
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| type Prefix string | ||
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| func (p Prefix) Key(elem ...string) string { | ||
| elem = append([]string{string(p)}, elem...) | ||
| return path.Join(elem...) | ||
| } | ||
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| func (p Prefix) Add(elem ...string) Prefix { | ||
| return Prefix(p.Key(elem...)) | ||
| } | ||
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| func (p Prefix) Keys(list []string) []string { | ||
| result := make([]string, len(list)) | ||
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| for i := 0; i < len(list); i++ { | ||
| result[i] = p.Key(list[i]) | ||
| } | ||
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| return result | ||
| } |