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direct.go
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direct.go
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package rediqueue
// Commands to modify and query our databases directly.
import (
"errors"
)
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)
// ErrIntValueError can returned by INCRBY
ErrIntValueError = errors.New(msgInvalidInt)
// ErrFloatValueError can returned by INCRBYFLOAT
ErrFloatValueError = errors.New(msgInvalidFloat)
)
// Select sets the DB id for all direct commands.
func (m *RediQueue) Select(i int) {
m.Lock()
defer m.Unlock()
m.selectedDB = i
}
// Keys returns all keys from the selected database, sorted.
func (m *RediQueue) 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 *RediQueue) FlushAll() {
m.Lock()
defer m.Unlock()
m.flushAll()
}
func (m *RediQueue) flushAll() {
for _, db := range m.dbs {
db.flush()
}
}
// FlushDB removes all keys from the selected database.
func (m *RediQueue) FlushDB() {
m.DB(m.selectedDB).FlushDB()
}
// FlushDB removes all keys.
func (db *RedisDB) FlushDB() {
db.master.Lock()
defer db.master.Unlock()
db.flush()
}
// 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 *RediQueue) 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) != "list" {
return nil, ErrWrongType
}
return db.listKeys[k], nil
}
// Lpush is an unshift. Returns the new length.
func (m *RediQueue) Lpush(k, v string) (int, error) {
return m.DB(m.selectedDB).Lpush(k, v)
}
// Lpush is an unshift. Returns the new length.
func (db *RedisDB) Lpush(k, v string) (int, error) {
db.master.Lock()
defer db.master.Unlock()
if db.exists(k) && db.t(k) != "list" {
return 0, ErrWrongType
}
return db.listLpush(k, v), nil
}
// Lpop is a shift. Returns the popped element.
func (m *RediQueue) Lpop(k string) (string, error) {
return m.DB(m.selectedDB).Lpop(k)
}
// Lpop is a shift. Returns the popped element.
func (db *RedisDB) Lpop(k string) (string, error) {
db.master.Lock()
defer db.master.Unlock()
if !db.exists(k) {
return "", ErrKeyNotFound
}
if db.t(k) != "list" {
return "", ErrWrongType
}
return db.listLpop(k), nil
}
// Push add element at the end. Is called RPUSH in redis. Returns the new length.
func (m *RediQueue) 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()
if db.exists(k) && db.t(k) != "list" {
return 0, ErrWrongType
}
return db.listPush(k, v...), nil
}
// Pop removes and returns the last element. Is called RPOP in Redis.
func (m *RediQueue) 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()
if !db.exists(k) {
return "", ErrKeyNotFound
}
if db.t(k) != "list" {
return "", ErrWrongType
}
return db.listPop(k), nil
}
// SetAdd adds keys to a set. Returns the number of new keys.
func (m *RediQueue) 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()
if db.exists(k) && db.t(k) != "set" {
return 0, ErrWrongType
}
return db.setAdd(k, elems...), nil
}
// Members gives all set keys. Sorted.
func (m *RediQueue) 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) != "set" {
return nil, ErrWrongType
}
return db.setMembers(k), nil
}
// IsMember tells if value is in the set.
func (m *RediQueue) 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) != "set" {
return false, ErrWrongType
}
return db.setIsMember(k, v), nil
}
// Del deletes a key and any expiration value. Returns whether there was a key.
func (m *RediQueue) 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()
if !db.exists(k) {
return false
}
db.del(k)
return true
}
// Type gives the type of a key, or ""
func (m *RediQueue) 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 *RediQueue) 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)
}
// SRem removes fields from a set. Returns number of deleted fields.
func (m *RediQueue) 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()
if !db.exists(k) {
return 0, ErrKeyNotFound
}
if db.t(k) != "set" {
return 0, ErrWrongType
}
return db.setRem(k, fields...), nil
}