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Copy pathdirect.go
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945 lines (782 loc) · 23.9 KB
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package miniredis
// Commands to modify and query our databases directly.
import (
"errors"
"math/big"
"time"
)
var (
// ErrKeyNotFound is returned when a key doesn't exist.
ErrKeyNotFound = errors.New(msgKeyNotFound)
// ErrWrongType when a key is not the right type.
ErrWrongType = errors.New(msgWrongType)
// ErrNotValidHllValue when a key is not a valid HyperLogLog string value.
ErrNotValidHllValue = errors.New(msgNotValidHllValue)
// ErrIntValueError can returned by INCRBY
ErrIntValueError = errors.New(msgInvalidInt)
// ErrIntValueOverflowError can be returned by INCR, DECR, INCRBY, DECRBY
ErrIntValueOverflowError = errors.New(msgIntOverflow)
// ErrFloatValueError can returned by INCRBYFLOAT
ErrFloatValueError = errors.New(msgInvalidFloat)
)
// Select sets the DB id for all direct commands.
func (m *Miniredis) Select(i int) {
m.Lock()
defer m.Unlock()
m.selectedDB = i
}
// Keys returns all keys from the selected database, sorted.
func (m *Miniredis) Keys() []string {
return m.DB(m.selectedDB).Keys()
}
// Keys returns all keys, sorted.
func (db *RedisDB) Keys() []string {
db.master.Lock()
defer db.master.Unlock()
return db.allKeys()
}
// FlushAll removes all keys from all databases.
func (m *Miniredis) FlushAll() {
m.Lock()
defer m.Unlock()
defer m.signal.Broadcast()
m.flushAll()
}
func (m *Miniredis) flushAll() {
for _, db := range m.dbs {
db.flush()
}
}
// FlushDB removes all keys from the selected database.
func (m *Miniredis) FlushDB() {
m.DB(m.selectedDB).FlushDB()
}
// FlushDB removes all keys.
func (db *RedisDB) FlushDB() {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
db.flush()
}
// Get returns string keys added with SET.
func (m *Miniredis) Get(k string) (string, error) {
return m.DB(m.selectedDB).Get(k)
}
// Get returns a string key.
func (db *RedisDB) Get(k string) (string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return "", ErrKeyNotFound
}
if db.t(k) != keyTypeString {
return "", ErrWrongType
}
return db.stringGet(k), nil
}
// Set sets a string key. Removes expire.
func (m *Miniredis) Set(k, v string) error {
return m.DB(m.selectedDB).Set(k, v)
}
// Set sets a string key. Removes expire.
// Unlike redis the key can't be an existing non-string key.
func (db *RedisDB) Set(k, v string) error {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeString {
return ErrWrongType
}
db.del(k, true) // Remove expire
db.stringSet(k, v)
return nil
}
// Incr changes a int string value by delta.
func (m *Miniredis) Incr(k string, delta int) (int, error) {
return m.DB(m.selectedDB).Incr(k, delta)
}
// Incr changes a int string value by delta.
func (db *RedisDB) Incr(k string, delta int) (int, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeString {
return 0, ErrWrongType
}
return db.stringIncr(k, delta)
}
// IncrByFloat increments the float value of a key by the given delta.
// is an alias for Miniredis.Incrfloat
func (m *Miniredis) IncrByFloat(k string, delta float64) (float64, error) {
return m.Incrfloat(k, delta)
}
// Incrfloat changes a float string value by delta.
func (m *Miniredis) Incrfloat(k string, delta float64) (float64, error) {
return m.DB(m.selectedDB).Incrfloat(k, delta)
}
// Incrfloat changes a float string value by delta.
func (db *RedisDB) Incrfloat(k string, delta float64) (float64, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeString {
return 0, ErrWrongType
}
v, err := db.stringIncrfloat(k, big.NewFloat(delta))
if err != nil {
return 0, err
}
vf, _ := v.Float64()
return vf, nil
}
// List returns the list k, or an error if it's not there or something else.
// This is the same as the Redis command `LRANGE 0 -1`, but you can do your own
// range-ing.
func (m *Miniredis) List(k string) ([]string, error) {
return m.DB(m.selectedDB).List(k)
}
// List returns the list k, or an error if it's not there or something else.
// This is the same as the Redis command `LRANGE 0 -1`, but you can do your own
// range-ing.
func (db *RedisDB) List(k string) ([]string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return nil, ErrKeyNotFound
}
if db.t(k) != keyTypeList {
return nil, ErrWrongType
}
return db.listKeys[k], nil
}
// Lpush prepends one value to a list. Returns the new length.
func (m *Miniredis) Lpush(k, v string) (int, error) {
return m.DB(m.selectedDB).Lpush(k, v)
}
// Lpush prepends one value to a list. Returns the new length.
func (db *RedisDB) Lpush(k, v string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeList {
return 0, ErrWrongType
}
return db.listLpush(k, v), nil
}
// Lpop removes and returns the last element in a list.
func (m *Miniredis) Lpop(k string) (string, error) {
return m.DB(m.selectedDB).Lpop(k)
}
// Lpop removes and returns the last element in a list.
func (db *RedisDB) Lpop(k string) (string, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if !db.exists(k) {
return "", ErrKeyNotFound
}
if db.t(k) != keyTypeList {
return "", ErrWrongType
}
return db.listLpop(k), nil
}
// RPush appends one or multiple values to a list. Returns the new length.
// An alias for Push
func (m *Miniredis) RPush(k string, v ...string) (int, error) {
return m.Push(k, v...)
}
// Push add element at the end. Returns the new length.
func (m *Miniredis) Push(k string, v ...string) (int, error) {
return m.DB(m.selectedDB).Push(k, v...)
}
// Push add element at the end. Is called RPUSH in redis. Returns the new length.
func (db *RedisDB) Push(k string, v ...string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeList {
return 0, ErrWrongType
}
return db.listPush(k, v...), nil
}
// RPop is an alias for Pop
func (m *Miniredis) RPop(k string) (string, error) {
return m.Pop(k)
}
// Pop removes and returns the last element. Is called RPOP in Redis.
func (m *Miniredis) Pop(k string) (string, error) {
return m.DB(m.selectedDB).Pop(k)
}
// Pop removes and returns the last element. Is called RPOP in Redis.
func (db *RedisDB) Pop(k string) (string, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if !db.exists(k) {
return "", ErrKeyNotFound
}
if db.t(k) != keyTypeList {
return "", ErrWrongType
}
return db.listPop(k), nil
}
// SAdd adds keys to a set. Returns the number of new keys.
// Alias for SetAdd
func (m *Miniredis) SAdd(k string, elems ...string) (int, error) {
return m.SetAdd(k, elems...)
}
// SetAdd adds keys to a set. Returns the number of new keys.
func (m *Miniredis) SetAdd(k string, elems ...string) (int, error) {
return m.DB(m.selectedDB).SetAdd(k, elems...)
}
// SetAdd adds keys to a set. Returns the number of new keys.
func (db *RedisDB) SetAdd(k string, elems ...string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeSet {
return 0, ErrWrongType
}
return db.setAdd(k, elems...), nil
}
// SMembers returns all keys in a set, sorted.
// Alias for Members.
func (m *Miniredis) SMembers(k string) ([]string, error) {
return m.Members(k)
}
// Members returns all keys in a set, sorted.
func (m *Miniredis) Members(k string) ([]string, error) {
return m.DB(m.selectedDB).Members(k)
}
// Members gives all set keys. Sorted.
func (db *RedisDB) Members(k string) ([]string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return nil, ErrKeyNotFound
}
if db.t(k) != keyTypeSet {
return nil, ErrWrongType
}
return db.setMembers(k), nil
}
// SIsMember tells if value is in the set.
// Alias for IsMember
func (m *Miniredis) SIsMember(k, v string) (bool, error) {
return m.IsMember(k, v)
}
// IsMember tells if value is in the set.
func (m *Miniredis) IsMember(k, v string) (bool, error) {
return m.DB(m.selectedDB).IsMember(k, v)
}
// IsMember tells if value is in the set.
func (db *RedisDB) IsMember(k, v string) (bool, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return false, ErrKeyNotFound
}
if db.t(k) != keyTypeSet {
return false, ErrWrongType
}
return db.setIsMember(k, v), nil
}
// HKeys returns all (sorted) keys ('fields') for a hash key.
func (m *Miniredis) HKeys(k string) ([]string, error) {
return m.DB(m.selectedDB).HKeys(k)
}
// HKeys returns all (sorted) keys ('fields') for a hash key.
func (db *RedisDB) HKeys(key string) ([]string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(key) {
return nil, ErrKeyNotFound
}
if db.t(key) != keyTypeHash {
return nil, ErrWrongType
}
return db.hashFields(key), nil
}
// Del deletes a key and any expiration value. Returns whether there was a key.
func (m *Miniredis) Del(k string) bool {
return m.DB(m.selectedDB).Del(k)
}
// Del deletes a key and any expiration value. Returns whether there was a key.
func (db *RedisDB) Del(k string) bool {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if !db.exists(k) {
return false
}
db.del(k, true)
return true
}
// Unlink deletes a key and any expiration value. Returns where there was a key.
// It's exactly the same as Del() and is not async. It is here for the consistency.
func (m *Miniredis) Unlink(k string) bool {
return m.Del(k)
}
// Unlink deletes a key and any expiration value. Returns where there was a key.
// It's exactly the same as Del() and is not async. It is here for the consistency.
func (db *RedisDB) Unlink(k string) bool {
return db.Del(k)
}
// TTL is the left over time to live. As set via EXPIRE, PEXPIRE, EXPIREAT,
// PEXPIREAT.
// Note: this direct function returns 0 if there is no TTL set, unlike redis,
// which returns -1.
func (m *Miniredis) TTL(k string) time.Duration {
return m.DB(m.selectedDB).TTL(k)
}
// TTL is the left over time to live. As set via EXPIRE, PEXPIRE, EXPIREAT,
// PEXPIREAT.
// 0 if not set.
func (db *RedisDB) TTL(k string) time.Duration {
db.master.Lock()
defer db.master.Unlock()
return db.ttl[k]
}
// SetTTL sets the TTL of a key.
func (m *Miniredis) SetTTL(k string, ttl time.Duration) {
m.DB(m.selectedDB).SetTTL(k, ttl)
}
// SetTTL sets the time to live of a key.
func (db *RedisDB) SetTTL(k string, ttl time.Duration) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
db.ttl[k] = ttl
db.incr(k)
}
// Type gives the type of a key, or ""
func (m *Miniredis) Type(k string) string {
return m.DB(m.selectedDB).Type(k)
}
// Type gives the type of a key, or ""
func (db *RedisDB) Type(k string) string {
db.master.Lock()
defer db.master.Unlock()
return db.t(k)
}
// Exists tells whether a key exists.
func (m *Miniredis) Exists(k string) bool {
return m.DB(m.selectedDB).Exists(k)
}
// Exists tells whether a key exists.
func (db *RedisDB) Exists(k string) bool {
db.master.Lock()
defer db.master.Unlock()
return db.exists(k)
}
// HGet returns hash keys added with HSET.
// This will return an empty string if the key is not set. Redis would return
// a nil.
// Returns empty string when the key is of a different type.
func (m *Miniredis) HGet(k, f string) string {
return m.DB(m.selectedDB).HGet(k, f)
}
// HGet returns hash keys added with HSET.
// Returns empty string when the key is of a different type.
func (db *RedisDB) HGet(k, f string) string {
db.master.Lock()
defer db.master.Unlock()
h, ok := db.hashKeys[k]
if !ok {
return ""
}
return h[f]
}
// HSet sets hash keys.
// If there is another key by the same name it will be gone.
func (m *Miniredis) HSet(k string, fv ...string) {
m.DB(m.selectedDB).HSet(k, fv...)
}
// HSet sets hash keys.
// If there is another key by the same name it will be gone.
func (db *RedisDB) HSet(k string, fv ...string) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
db.hashSet(k, fv...)
}
// HExpire sets a TTL on a hash field. Returns true if the field exists.
func (m *Miniredis) HExpire(key, field string, ttl time.Duration) bool {
return m.DB(m.selectedDB).HExpire(key, field, ttl)
}
// HExpire sets a TTL on a hash field. Returns true if the field exists.
func (db *RedisDB) HExpire(key, field string, ttl time.Duration) bool {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if !db.exists(key) || db.t(key) != keyTypeHash {
return false
}
if _, ok := db.hashKeys[key][field]; !ok {
return false
}
if db.hashTTLs[key] == nil {
db.hashTTLs[key] = map[string]time.Duration{}
}
db.hashTTLs[key][field] = ttl
return true
}
// HPersist removes a TTL from a hash field. Returns true if there was a TTL.
func (m *Miniredis) HPersist(key, field string) bool {
return m.DB(m.selectedDB).HPersist(key, field)
}
// HPersist removes a TTL from a hash field. Returns true if there was a TTL.
func (db *RedisDB) HPersist(key, field string) bool {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
fieldTTLs := db.hashTTLs[key]
if fieldTTLs == nil {
return false
}
if _, ok := fieldTTLs[field]; !ok {
return false
}
delete(fieldTTLs, field)
return true
}
// HTTL returns the remaining TTL of a hash field. Returns 0 if no TTL.
func (m *Miniredis) HTTL(key, field string) time.Duration {
return m.DB(m.selectedDB).HTTL(key, field)
}
// HTTL returns the remaining TTL of a hash field. Returns 0 if no TTL.
func (db *RedisDB) HTTL(key, field string) time.Duration {
db.master.Lock()
defer db.master.Unlock()
fieldTTLs := db.hashTTLs[key]
if fieldTTLs == nil {
return 0
}
return fieldTTLs[field]
}
// HSetEX sets hash fields with a TTL.
func (m *Miniredis) HSetEX(key string, ttl time.Duration, fv ...string) {
m.DB(m.selectedDB).HSetEX(key, ttl, fv...)
}
// HSetEX sets hash fields with a TTL.
func (db *RedisDB) HSetEX(key string, ttl time.Duration, fv ...string) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
db.hashSet(key, fv...)
if db.hashTTLs[key] == nil {
db.hashTTLs[key] = map[string]time.Duration{}
}
for i := 0; i < len(fv); i += 2 {
db.hashTTLs[key][fv[i]] = ttl
}
}
// HDel deletes a hash key.
func (m *Miniredis) HDel(k, f string) {
m.DB(m.selectedDB).HDel(k, f)
}
// HDel deletes a hash key.
func (db *RedisDB) HDel(k, f string) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
db.hdel(k, f)
}
func (db *RedisDB) hdel(k, f string) {
if _, ok := db.hashKeys[k]; !ok {
return
}
delete(db.hashKeys[k], f)
db.incr(k)
}
// HIncrBy increases the integer value of a hash field by delta (int).
func (m *Miniredis) HIncrBy(k, f string, delta int) (int, error) {
return m.HIncr(k, f, delta)
}
// HIncr increases a key/field by delta (int).
func (m *Miniredis) HIncr(k, f string, delta int) (int, error) {
return m.DB(m.selectedDB).HIncr(k, f, delta)
}
// HIncr increases a key/field by delta (int).
func (db *RedisDB) HIncr(k, f string, delta int) (int, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
return db.hashIncr(k, f, delta)
}
// HIncrByFloat increases a key/field by delta (float).
func (m *Miniredis) HIncrByFloat(k, f string, delta float64) (float64, error) {
return m.HIncrfloat(k, f, delta)
}
// HIncrfloat increases a key/field by delta (float).
func (m *Miniredis) HIncrfloat(k, f string, delta float64) (float64, error) {
return m.DB(m.selectedDB).HIncrfloat(k, f, delta)
}
// HIncrfloat increases a key/field by delta (float).
func (db *RedisDB) HIncrfloat(k, f string, delta float64) (float64, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
v, err := db.hashIncrfloat(k, f, big.NewFloat(delta))
if err != nil {
return 0, err
}
vf, _ := v.Float64()
return vf, nil
}
// SRem removes fields from a set. Returns number of deleted fields.
func (m *Miniredis) SRem(k string, fields ...string) (int, error) {
return m.DB(m.selectedDB).SRem(k, fields...)
}
// SRem removes fields from a set. Returns number of deleted fields.
func (db *RedisDB) SRem(k string, fields ...string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if !db.exists(k) {
return 0, ErrKeyNotFound
}
if db.t(k) != keyTypeSet {
return 0, ErrWrongType
}
return db.setRem(k, fields...), nil
}
// ZAdd adds a score,member to a sorted set.
func (m *Miniredis) ZAdd(k string, score float64, member string) (bool, error) {
return m.DB(m.selectedDB).ZAdd(k, score, member)
}
// ZAdd adds a score,member to a sorted set.
func (db *RedisDB) ZAdd(k string, score float64, member string) (bool, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if db.exists(k) && db.t(k) != keyTypeSortedSet {
return false, ErrWrongType
}
return db.ssetAdd(k, score, member), nil
}
// ZMembers returns all members of a sorted set by score
func (m *Miniredis) ZMembers(k string) ([]string, error) {
return m.DB(m.selectedDB).ZMembers(k)
}
// ZMembers returns all members of a sorted set by score
func (db *RedisDB) ZMembers(k string) ([]string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return nil, ErrKeyNotFound
}
if db.t(k) != keyTypeSortedSet {
return nil, ErrWrongType
}
return db.ssetMembers(k), nil
}
// SortedSet returns a raw string->float64 map.
func (m *Miniredis) SortedSet(k string) (map[string]float64, error) {
return m.DB(m.selectedDB).SortedSet(k)
}
// SortedSet returns a raw string->float64 map.
func (db *RedisDB) SortedSet(k string) (map[string]float64, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return nil, ErrKeyNotFound
}
if db.t(k) != keyTypeSortedSet {
return nil, ErrWrongType
}
return db.sortedSet(k), nil
}
// ZRem deletes a member. Returns whether the was a key.
func (m *Miniredis) ZRem(k, member string) (bool, error) {
return m.DB(m.selectedDB).ZRem(k, member)
}
// ZRem deletes a member. Returns whether the was a key.
func (db *RedisDB) ZRem(k, member string) (bool, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
if !db.exists(k) {
return false, ErrKeyNotFound
}
if db.t(k) != keyTypeSortedSet {
return false, ErrWrongType
}
return db.ssetRem(k, member), nil
}
// ZScore gives the score of a sorted set member.
func (m *Miniredis) ZScore(k, member string) (float64, error) {
return m.DB(m.selectedDB).ZScore(k, member)
}
// ZScore gives the score of a sorted set member.
func (db *RedisDB) ZScore(k, member string) (float64, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return 0, ErrKeyNotFound
}
if db.t(k) != keyTypeSortedSet {
return 0, ErrWrongType
}
return db.ssetScore(k, member), nil
}
// ZScore gives scores of a list of members in a sorted set.
func (m *Miniredis) ZMScore(k string, members ...string) ([]float64, error) {
return m.DB(m.selectedDB).ZMScore(k, members)
}
func (db *RedisDB) ZMScore(k string, members []string) ([]float64, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return nil, ErrKeyNotFound
}
if db.t(k) != keyTypeSortedSet {
return nil, ErrWrongType
}
return db.ssetMScore(k, members), nil
}
// XAdd adds an entry to a stream. `id` can be left empty or be '*'.
// If a value is given normal XADD rules apply. Values should be an even
// length.
func (m *Miniredis) XAdd(k string, id string, values []string) (string, error) {
return m.DB(m.selectedDB).XAdd(k, id, values)
}
// XAdd adds an entry to a stream. `id` can be left empty or be '*'.
// If a value is given normal XADD rules apply. Values should be an even
// length.
func (db *RedisDB) XAdd(k string, id string, values []string) (string, error) {
db.master.Lock()
defer db.master.Unlock()
defer db.master.signal.Broadcast()
s, err := db.stream(k)
if err != nil {
return "", err
}
if s == nil {
s, _ = db.newStream(k)
}
return s.add(id, values, db.master.effectiveNow())
}
// Stream returns a slice of stream entries. Oldest first.
func (m *Miniredis) Stream(k string) ([]StreamEntry, error) {
return m.DB(m.selectedDB).Stream(k)
}
// Stream returns a slice of stream entries. Oldest first.
func (db *RedisDB) Stream(key string) ([]StreamEntry, error) {
db.master.Lock()
defer db.master.Unlock()
s, err := db.stream(key)
if err != nil {
return nil, err
}
if s == nil {
return nil, nil
}
return s.entries, nil
}
// Publish a message to subscribers. Returns the number of receivers.
func (m *Miniredis) Publish(channel, message string) int {
m.Lock()
defer m.Unlock()
return m.publish(channel, message)
}
// PubSubChannels is "PUBSUB CHANNELS <pattern>". An empty pattern is fine
// (meaning all channels).
// Returned channels will be ordered alphabetically.
func (m *Miniredis) PubSubChannels(pattern string) []string {
m.Lock()
defer m.Unlock()
return activeChannels(m.allSubscribers(), pattern)
}
// PubSubNumSub is "PUBSUB NUMSUB [channels]". It returns all channels with their
// subscriber count.
func (m *Miniredis) PubSubNumSub(channels ...string) map[string]int {
m.Lock()
defer m.Unlock()
subs := m.allSubscribers()
res := map[string]int{}
for _, channel := range channels {
res[channel] = countSubs(subs, channel)
}
return res
}
// PubSubNumPat is "PUBSUB NUMPAT"
func (m *Miniredis) PubSubNumPat() int {
m.Lock()
defer m.Unlock()
return countPsubs(m.allSubscribers())
}
// PfAdd adds keys to a hll. Returns the flag which equals to 1 if the inner hll value has been changed.
func (m *Miniredis) PfAdd(k string, elems ...string) (int, error) {
return m.DB(m.selectedDB).HllAdd(k, elems...)
}
// HllAdd adds keys to a hll. Returns the flag which equals to true if the inner hll value has been changed.
func (db *RedisDB) HllAdd(k string, elems ...string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
if db.exists(k) && db.t(k) != keyTypeHll {
return 0, ErrWrongType
}
return db.hllAdd(k, elems...), nil
}
// PfCount returns an estimation of the amount of elements previously added to a hll.
func (m *Miniredis) PfCount(keys ...string) (int, error) {
return m.DB(m.selectedDB).HllCount(keys...)
}
// HllCount returns an estimation of the amount of elements previously added to a hll.
func (db *RedisDB) HllCount(keys ...string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
return db.hllCount(keys)
}
// PfMerge merges all the input hlls into a hll under destKey key.
func (m *Miniredis) PfMerge(destKey string, sourceKeys ...string) error {
return m.DB(m.selectedDB).HllMerge(destKey, sourceKeys...)
}
// HllMerge merges all the input hlls into a hll under destKey key.
func (db *RedisDB) HllMerge(destKey string, sourceKeys ...string) error {
db.master.Lock()
defer db.master.Unlock()
return db.hllMerge(append([]string{destKey}, sourceKeys...))
}
// Copy a value.
// Needs the IDs of both the source and dest DBs (which can differ).
// Returns ErrKeyNotFound if src does not exist.
// Overwrites dest if it already exists (unlike the redis command, which needs a flag to allow that).
func (m *Miniredis) Copy(srcDB int, src string, destDB int, dest string) error {
return m.copy(m.DB(srcDB), src, m.DB(destDB), dest)
}
func (m *Miniredis) SCard(key string) (int, error) {
return m.DB(m.selectedDB).SCard(key)
}
func (db *RedisDB) SCard(key string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(key) {
return 0, nil
}
if db.t(key) != "set" {
return 0, ErrWrongType
}
return len(db.setMembers(key)), nil
}
// return "" if there were no members
func (m *Miniredis) SRandMember(key string) (string, error) {
return m.DB(m.selectedDB).SRandMember(key)
}
func (db *RedisDB) SRandMember(key string) (string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(key) {
return "", nil
}
if db.t(key) != "set" {
return "", ErrWrongType
}
members := db.setMembers(key)
if len(members) == 0 {
return "", nil
}
db.master.shuffle(members)
return members[0], nil
}