Class: Redis::Connection::Memory

Inherits:
Object
  • Object
show all
Includes:
BitopCommand, CommandExecutor, FakeRedis, CommandHelper, SortMethod, TransactionCommands
Defined in:
lib/redis/connection/memory.rb

Constant Summary

Constants included from FakeRedis

FakeRedis::Redis, FakeRedis::TRANSACTION_COMMANDS, FakeRedis::VERSION

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from FakeRedis

disable, enable, enabled?

Constructor Details

#initialize(options = {}) ⇒ Memory

Returns a new instance of Memory.



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# File 'lib/redis/connection/memory.rb', line 53

def initialize(options = {})
  self.options = options
end

Instance Attribute Details

#database_id ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 57

def database_id
  @database_id ||= 0
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/redis/connection/memory.rb', line 24

def options
  @options
end

#replies ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 79

def replies
  @replies ||= []
end

Class Method Details

.channels ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 41

def self.channels
  @channels ||= Hash.new {|h,k| h[k] = [] }
end

.connect(options = {}) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 49

def self.connect(options = {})
  new(options)
end

.databases ⇒ Object

Tracks all databases for all instances across the current process. We have to be able to handle two clients with the same host/port accessing different databases at once without overwriting each other. So we store our “data” outside the client instances, in this class level instance method. Client instances access it with a key made up of their host/port, and then select which DB out of the array of them they want. Allows the access we need.



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# File 'lib/redis/connection/memory.rb', line 32

def self.databases
  @databases ||= Hash.new {|h,k| h[k] = [] }
end

.reset_all_channels ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 45

def self.reset_all_channels
  @channels = nil
end

.reset_all_databases ⇒ Object

Used for resetting everything in specs



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# File 'lib/redis/connection/memory.rb', line 37

def self.reset_all_databases
  @databases = nil
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 856

def [](key)
  get(key)
end

#[]=(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 860

def []=(key, value)
  set(key, value)
end

#append(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 237

def append(key, value)
  data[key] = (data[key] || "")
  data[key] = data[key] + value.to_s
end

#auth(password) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 121

def auth(password)
  "OK"
end

#bgrewriteaof ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 152

def bgrewriteaof ; end

#bgsave ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 150

def bgsave ; end

#bitcount(key, start_index = 0, end_index = -1)) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 212

def bitcount(key, start_index = 0, end_index = -1)
  return 0 unless data[key]
  data[key][start_index..end_index].unpack('B*')[0].count("1")
end

#blpop(keys, timeout = 0) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 507

def blpop(keys, timeout=0)
  #todo threaded mode
  keys = Array(keys)
  keys.each do |key|
    if data[key] && data[key].size > 0
      return [key, data[key].shift]
    end
  end
  sleep(timeout.to_f)
  nil
end

#brpop(keys, timeout = 0) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 475

def brpop(keys, timeout=0)
  #todo threaded mode
  keys = Array(keys)
  keys.each do |key|
    if data[key] && data[key].size > 0
      return [key, data[key].pop]
    end
  end
  sleep(timeout.to_f)
  nil
end

#brpoplpush(key1, key2, opts = {}) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 494

def brpoplpush(key1, key2, opts={})
  data_type_check(key1, Array)
  brpop(key1).tap do |elem|
    lpush(key2, elem) unless elem.nil?
  end
end

#client(command, _options = {}) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 94

def client(command, _options = {})
  case command
  when :setname then true
  when :getname then nil
  when :client then true
  else
    raise Redis::CommandError, "ERR unknown command '#{command}'"
  end
end

#connect_unix(path, timeout) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 88

def connect_unix(path, timeout)
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis/connection/memory.rb', line 84

def connected?
  true
end

#data ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 75

def data
  find_database
end

#database_instance_key ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 63

def database_instance_key
  [options[:host], options[:port]].hash
end

#databases ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 67

def databases
  self.class.databases[database_instance_key]
end

#dbsize ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 345

def dbsize
  data.keys.count
end

#decr(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 946

def decr(key)
  data.merge!({ key => (data[key].to_i - 1).to_s || "-1"})
  data[key].to_i
end

#decrby(key, by) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 951

def decrby(key, by)
  data.merge!({ key => ((data[key].to_i - by.to_i) || (by.to_i * -1)).to_s })
  data[key].to_i
end

#del(*keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 682

def del(*keys)
  keys = keys.flatten(1)
  raise_argument_error('del') if keys.empty?

  old_count = data.keys.size
  keys.each do |key|
    data.delete(key)
  end
  old_count - data.keys.size
end

#disconnect ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 91

def disconnect
end

#dump(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 163

def dump(key)
  return nil unless exists(key)

  value = data[key]

  Marshal.dump(
    value: value,
    version: FakeRedis::VERSION, # Redis includes the version, so we might as well
  )
end

#echo(string) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 328

def echo(string)
  string
end

#exists(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 349

def exists(key)
  data.key?(key)
end

#expire(key, ttl) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 718

def expire(key, ttl)
  return 0 unless data[key]
  data.expires[key] = Time.now + ttl
  1
end

#expireat(key, timestamp) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 746

def expireat(key, timestamp)
  data.expires[key] = Time.at(timestamp)
  true
end

#find_database(id = database_id) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 71

def find_database id=database_id
  databases[id] ||= ExpiringHash.new
end

#flushall ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 116

def flushall
  self.class.databases[database_instance_key] = []
  "OK"
end

#flushdb ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 111

def flushdb
  databases.delete_at(database_id)
  "OK"
end

#get(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 202

def get(key)
  data_type_check(key, String)
  data[key]
end

#getbit(key, offset) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 207

def getbit(key, offset)
  return unless data[key]
  data[key].unpack('B*')[0].split("")[offset].to_i
end

#getrange(key, start, ending) ⇒ Object Also known as: substr 



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# File 'lib/redis/connection/memory.rb', line 217

def getrange(key, start, ending)
  return unless data[key]
  data[key][start..ending]
end

#getset(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 223

def getset(key, value)
  data_type_check(key, String)
  data[key].tap do
    set(key, value)
  end
end

#hdel(key, field) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 257

def hdel(key, field)
  data_type_check(key, Hash)
  return 0 unless data[key]

  if field.is_a?(Array)
    old_keys_count = data[key].size
    fields = field.map(&:to_s)

    data[key].delete_if { |k, v| fields.include? k }
    deleted = old_keys_count - data[key].size
  else
    field = field.to_s
    deleted = data[key].delete(field) ? 1 : 0
  end

  remove_key_for_empty_collection(key)
  deleted
end

#hexists(key, field) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 848

def hexists(key, field)
  data_type_check(key, Hash)
  return false unless data[key]
  data[key].key?(field.to_s)
end

#hget(key, field) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 252

def hget(key, field)
  data_type_check(key, Hash)
  data[key] && data[key][field.to_s]
end

#hgetall(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 247

def hgetall(key)
  data_type_check(key, Hash)
  data[key].to_a.flatten || {}
end

#hincrby(key, field, increment) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 826

def hincrby(key, field, increment)
  data_type_check(key, Hash)
  field = field.to_s
  if data[key]
    data[key][field] = (data[key][field].to_i + increment.to_i).to_s
  else
    data[key] = { field => increment.to_s }
  end
  data[key][field].to_i
end

#hincrbyfloat(key, field, increment) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 837

def hincrbyfloat(key, field, increment)
  data_type_check(key, Hash)
  field = field.to_s
  if data[key]
    data[key][field] = (data[key][field].to_f + increment.to_f).to_s
  else
    data[key] = { field => increment.to_s }
  end
  data[key][field]
end

#hkeys(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 276

def hkeys(key)
  data_type_check(key, Hash)
  return [] if data[key].nil?
  data[key].keys
end

#hlen(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 814

def hlen(key)
  data_type_check(key, Hash)
  return 0 unless data[key]
  data[key].size
end

#hmget(key, *fields) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 800

def hmget(key, *fields)
  raise_argument_error('hmget')  if fields.empty?

  data_type_check(key, Hash)
  fields.flatten.map do |field|
    field = field.to_s
    if data[key]
      data[key][field]
    else
      nil
    end
  end
end

#hmset(key, *fields) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 775

def hmset(key, *fields)
  # mapped_hmset gives us [[:k1, "v1", :k2, "v2"]] for `fields`. Fix that.
  fields = fields[0] if mapped_param?(fields)
  raise_argument_error('hmset') if fields.empty?

  is_list_of_arrays = fields.all?{|field| field.instance_of?(Array)}

  raise_argument_error('hmset') if fields.size.odd? and !is_list_of_arrays
  raise_argument_error('hmset') if is_list_of_arrays and !fields.all?{|field| field.length == 2}

  data_type_check(key, Hash)
  data[key] ||= {}

  if is_list_of_arrays
    fields.each do |pair|
      data[key][pair[0].to_s] = pair[1].to_s
    end
  else
    fields.each_slice(2) do |field|
      data[key][field[0].to_s] = field[1].to_s
    end
  end
  "OK"
end

#hscan(key, start_cursor, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 282

def hscan(key, start_cursor, *args)
  data_type_check(key, Hash)
  return ["0", []] unless data[key]

  match = "*"
  count = 10

  if args.size.odd?
    raise_argument_error('hscan')
  end

  if idx = args.index("MATCH")
    match = args[idx + 1]
  end

  if idx = args.index("COUNT")
    count = args[idx + 1]
  end

  start_cursor = start_cursor.to_i

  cursor = start_cursor
  next_keys = []

  if start_cursor + count >= data[key].length
    next_keys = (data[key].to_a)[start_cursor..-1]
    cursor = 0
  else
    cursor = start_cursor + count
    next_keys = (data[key].to_a)[start_cursor..cursor-1]
  end

  filtered_next_keys = next_keys.select{|k,v| File.fnmatch(match, k)}
  result = filtered_next_keys.flatten.map(&:to_s)

  return ["#{cursor}", result]
end

#hset(key, field, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 755

def hset(key, field, value)
  data_type_check(key, Hash)
  field = field.to_s
  if data[key]
    result = !data[key].include?(field)
    data[key][field] = value.to_s
    result ? 1 : 0
  else
    data[key] = { field => value.to_s }
    1
  end
end

#hsetnx(key, field, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 768

def hsetnx(key, field, value)
  data_type_check(key, Hash)
  field = field.to_s
  return false if data[key] && data[key][field]
  hset(key, field, value)
end

#hvals(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 820

def hvals(key)
  data_type_check(key, Hash)
  return [] unless data[key]
  data[key].values
end

#incr(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 931

def incr(key)
  data.merge!({ key => (data[key].to_i + 1).to_s || "1"})
  data[key].to_i
end

#incrby(key, by) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 936

def incrby(key, by)
  data.merge!({ key => (data[key].to_i + by.to_i).to_s || by })
  data[key].to_i
end

#incrbyfloat(key, by) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 941

def incrbyfloat(key, by)
  data.merge!({ key => (data[key].to_f + by.to_f).to_s || by })
  data[key]
end

#info ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 131

def info
  {
    "redis_version" => "2.6.16",
    "connected_clients" => "1",
    "connected_slaves" => "0",
    "used_memory" => "3187",
    "changes_since_last_save" => "0",
    "last_save_time" => "1237655729",
    "total_connections_received" => "1",
    "total_commands_processed" => "1",
    "uptime_in_seconds" => "36000",
    "uptime_in_days" => 0
  }
end

#keys(pattern = "*") ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 320

def keys(pattern = "*")
  data.keys.select { |key| File.fnmatch(pattern, key) }
end

#lastsave ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 336

def lastsave
  Time.now.to_i
end

#lindex(key, index) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 388

def lindex(key, index)
  data_type_check(key, Array)
  data[key] && data[key][index]
end

#linsert(key, where, pivot, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 393

def linsert(key, where, pivot, value)
  data_type_check(key, Array)
  return unless data[key]

  value = value.to_s
  index = data[key].index(pivot.to_s)
  return -1 if index.nil?

  case where.to_s
    when /\Abefore\z/i then data[key].insert(index, value)
    when /\Aafter\z/i  then data[key].insert(index + 1, value)
    else raise_syntax_error
  end
end

#llen(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 353

def llen(key)
  data_type_check(key, Array)
  return 0 unless data[key]
  data[key].size
end

#lpop(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 501

def lpop(key)
  data_type_check(key, Array)
  return unless data[key]
  data[key].shift
end

#lpush(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 452

def lpush(key, value)
  raise_argument_error('lpush') if value.respond_to?(:each) && value.empty?
  data_type_check(key, Array)
  data[key] ||= []
  [value].flatten.each do |val|
    data[key].unshift(val.to_s)
  end
  data[key].size
end

#lpushx(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 462

def lpushx(key, value)
  raise_argument_error('lpushx') if value.respond_to?(:each) && value.empty?
  data_type_check(key, Array)
  return unless data[key]
  lpush(key, value)
end

#lrange(key, startidx, endidx) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 359

def lrange(key, startidx, endidx)
  data_type_check(key, Array)
  if data[key]
    # In Ruby when negative start index is out of range Array#slice returns
    # nil which is not the case for lrange in Redis.
    startidx = 0 if startidx < 0 && startidx.abs > data[key].size
    data[key][startidx..endidx] || []
  else
    []
  end
end

#lrem(key, count, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 415

def lrem(key, count, value)
  data_type_check(key, Array)
  return 0 unless data[key]

  value = value.to_s
  old_size = data[key].size
  diff =
    if count == 0
      data[key].delete(value)
      old_size - data[key].size
    else
      array = count > 0 ? data[key].dup : data[key].reverse
      count.abs.times{ array.delete_at(array.index(value) || array.length) }
      data[key] = count > 0 ? array.dup : array.reverse
      old_size - data[key].size
    end
  remove_key_for_empty_collection(key)
  diff
end

#lset(key, index, value) ⇒ Object

Raises:

  • (Redis::CommandError) 


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# File 'lib/redis/connection/memory.rb', line 408

def lset(key, index, value)
  data_type_check(key, Array)
  return unless data[key]
  raise Redis::CommandError, "ERR index out of range" if index >= data[key].size
  data[key][index] = value.to_s
end

#ltrim(key, start, stop) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 371

def ltrim(key, start, stop)
  data_type_check(key, Array)
  return unless data[key]

  # Example: we have a list of 3 elements and
  # we give it a ltrim list, -5, -1. This means
  # it should trim to a max of 5. Since 3 < 5
  # we should not touch the list. This is consistent
  # with behavior of real Redis's ltrim with a negative
  # start argument.
  unless start < 0 && data[key].count < start.abs
    data[key] = data[key][start..stop]
  end

  "OK"
end

#mget(*keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 230

def mget(*keys)
  raise_argument_error('mget') if keys.empty?
  # We work with either an array, or list of arguments
  keys = keys.first if keys.size == 1
  data.values_at(*keys)
end

#monitor ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 146

def monitor; end

#move(key, destination_id) ⇒ Object

Raises:

  • (Redis::CommandError) 


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# File 'lib/redis/connection/memory.rb', line 154

def move key, destination_id
  raise Redis::CommandError, "ERR source and destination objects are the same" if destination_id == database_id
  destination = find_database(destination_id)
  return false unless data.has_key?(key)
  return false if destination.has_key?(key)
  destination[key] = data.delete(key)
  true
end

#mset(*pairs) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 908

def mset(*pairs)
  # Handle pairs for mapped_mset command
  pairs = pairs[0] if mapped_param?(pairs)
  raise_argument_error('mset') if pairs.empty? || pairs.size == 1
  # We have to reply with a different error message here to be consistent with redis-rb 3.0.6 / redis-server 2.8.1
  raise_argument_error("mset", "mset_odd") if pairs.size.odd?

  pairs.each_slice(2) do |pair|
    data[pair[0].to_s] = pair[1].to_s
  end
  "OK"
end

#msetnx(*pairs) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 921

def msetnx(*pairs)
  # Handle pairs for mapped_msetnx command
  pairs = pairs[0] if mapped_param?(pairs)
  keys = []
  pairs.each_with_index{|item, index| keys << item.to_s if index % 2 == 0}
  return false if keys.any?{|key| data.key?(key) }
  mset(*pairs)
  true
end

#persist(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 751

def persist(key)
  !!data.expires.delete(key)
end

#pexpire(key, ttl) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 724

def pexpire(key, ttl)
  return 0 unless data[key]
  data.expires[key] = Time.now + (ttl / 1000.0)
  1
end

#ping ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 332

def ping
  "PONG"
end

#psubscribe(*patterns) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1233

def psubscribe(*patterns)
  raise_argument_error('psubscribe') if patterns.empty?()

  #Create messages for all data from the channels
  channel_replies = self.class.channels.keys.map do |channel|
    pattern = patterns.find{|p| File.fnmatch(p, channel) }
    unless pattern.nil?()
      self.class.channels[channel].slice!(0..-1).map!{|v| ["pmessage", pattern, channel, v]}
    end
  end
  channel_replies.flatten!(1)
  channel_replies.compact!()

  #Put messages into the replies for the future
  patterns.each_with_index do |pattern,index|
    replies << ["psubscribe", pattern, index+1]
  end
  replies.push(*channel_replies)

  #Add unsubscribe to stop blocking
  replies.push(self.punsubscribe())

  replies.pop() #Last reply will be pushed back on
end

#pttl(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 738

def pttl(key)
  if data.expires.include?(key) && (ttl = data.expires[key].to_f - Time.now.to_f) > 0
    ttl * 1000
  else
    exists(key) ? -1 : -2
  end
end

#publish(channel, message) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1258

def publish(channel, message)
  self.class.channels[channel] << message
  0 #Just fake number of subscribers
end

#punsubscribe(*patterns) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1274

def punsubscribe(*patterns)
  if patterns.empty?()
    replies << ["punsubscribe", nil, 0]
  else
    patterns.each do |pattern|
      replies << ["punsubscribe", pattern, 0]
    end
  end
  replies.pop() #Last reply will be pushed back on
end

#quit ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 967

def quit ; end

#randomkey ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 324

def randomkey
  data.keys[rand(dbsize)]
end

#read ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 107

def read
  replies.shift
end

#rename(key, new_key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 702

def rename(key, new_key)
  return unless data[key]
  data[new_key] = data[key]
  data.expires[new_key] = data.expires[key] if data.expires.include?(key)
  data.delete(key)
end

#renamenx(key, new_key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 709

def renamenx(key, new_key)
  if exists(new_key)
    false
  else
    rename(key, new_key)
    true
  end
end

#restore(key, ttl, serialized_value) ⇒ Object

Raises:

  • (Redis::CommandError) 


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# File 'lib/redis/connection/memory.rb', line 174

def restore(key, ttl, serialized_value)
  raise Redis::CommandError, "ERR Target key name is busy." if exists(key)

  raise Redis::CommandError, "ERR DUMP payload version or checksum are wrong" if serialized_value.nil?

  parsed_value = begin
    Marshal.load(serialized_value)
  rescue TypeError
    raise Redis::CommandError, "ERR DUMP payload version or checksum are wrong"
  end

  if parsed_value[:version] != FakeRedis::VERSION
    raise Redis::CommandError, "ERR DUMP payload version or checksum are wrong"
  end

  # We could figure out what type the key was and set it with the public API here,
  # or we could just assign the value. If we presume the serialized_value is only ever
  # a return value from `dump` then we've only been given something that was in
  # the internal data structure anyway.
  data[key] = parsed_value[:value]

  # Set a TTL if one has been passed
  ttl = ttl.to_i # Makes nil into 0
  expire(key, ttl / 1000) unless ttl.zero?

  "OK"
end

#rpop(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 469

def rpop(key)
  data_type_check(key, Array)
  return unless data[key]
  data[key].pop
end

#rpoplpush(key1, key2) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 487

def rpoplpush(key1, key2)
  data_type_check(key1, Array)
  rpop(key1).tap do |elem|
    lpush(key2, elem) unless elem.nil?
  end
end

#rpush(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 435

def rpush(key, value)
  raise_argument_error('rpush') if value.respond_to?(:each) && value.empty?
  data_type_check(key, Array)
  data[key] ||= []
  [value].flatten.each do |val|
    data[key].push(val.to_s)
  end
  data[key].size
end

#rpushx(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 445

def rpushx(key, value)
  raise_argument_error('rpushx') if value.respond_to?(:each) && value.empty?
  data_type_check(key, Array)
  return unless data[key]
  rpush(key, value)
end

#sadd(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 531

def sadd(key, value)
  data_type_check(key, ::Set)
  value = Array(value)
  raise_argument_error('sadd') if value.empty?

  result = if data[key]
    old_set = data[key].dup
    data[key].merge(value.map(&:to_s))
    (data[key] - old_set).size
  else
    data[key] = ::Set.new(value.map(&:to_s))
    data[key].size
  end

  # 0 = false, 1 = true, 2+ untouched
  return result == 1 if result < 2
  result
end

#save ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 148

def save; end

#scan(start_cursor, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 973

def scan(start_cursor, *args)
  match = "*"
  count = 10

  if idx = args.index("MATCH")
    match = args[idx + 1]
  end

  if idx = args.index("COUNT")
    count = args[idx + 1]
  end

  start_cursor = start_cursor.to_i
  data_type_check(start_cursor, Integer)

  cursor = start_cursor
  returned_keys = []
  final_page = start_cursor + count >= keys(match).length

  if final_page
    previous_keys_been_deleted = (count >= keys(match).length)
    start_index = previous_keys_been_deleted ? 0 : cursor

    returned_keys = keys(match)[start_index..-1]
    cursor = 0
  else
    end_index = start_cursor + (count - 1)
    returned_keys = keys(match)[start_cursor..end_index]
    cursor = start_cursor + count
  end

  return "#{cursor}", returned_keys
end

#scard(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 584

def scard(key)
  data_type_check(key, ::Set)
  return 0 unless data[key]
  data[key].size
end

#sdiff(key1, *keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 625

def sdiff(key1, *keys)
  keys = keys[0] if flatten?(keys)
  [key1, *keys].each { |k| data_type_check(k, ::Set) }
  keys = keys.map { |k| data[k] || ::Set.new }
  keys.inject(data[key1] || Set.new) do |memo, set|
    memo - set
  end.to_a
end

#sdiffstore(destination, key1, *keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 634

def sdiffstore(destination, key1, *keys)
  data_type_check(destination, ::Set)
  result = sdiff(key1, *keys)
  data[destination] = ::Set.new(result)
end

#select(index) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 125

def select(index)
  data_type_check(index, Integer)
  self.database_id = index
  "OK"
end

#set(key, value, *array_options) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 864

def set(key, value, *array_options)
  option_nx = array_options.delete("NX")
  option_xx = array_options.delete("XX")

  return false if option_nx && option_xx

  return false if option_nx && exists(key)
  return false if option_xx && !exists(key)

  data[key] = value.to_s

  options = Hash[array_options.each_slice(2).to_a]
  ttl_in_seconds = options["EX"] if options["EX"]
  ttl_in_seconds = options["PX"] / 1000.0 if options["PX"]

  expire(key, ttl_in_seconds) if ttl_in_seconds

  "OK"
end

#setbit(key, offset, bit) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 884

def setbit(key, offset, bit)
  old_val = data[key] ? data[key].unpack('B*')[0].split("") : []
  size_increment = [((offset/8)+1)*8-old_val.length, 0].max
  old_val += Array.new(size_increment).map{"0"}
  original_val = old_val[offset].to_i
  old_val[offset] = bit.to_s
  new_val = ""
  old_val.each_slice(8){|b| new_val = new_val + b.join("").to_i(2).chr }
  data[key] = new_val
  original_val
end

#setex(key, seconds, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 896

def setex(key, seconds, value)
  data[key] = value.to_s
  expire(key, seconds)
  "OK"
end

#setnx(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 693

def setnx(key, value)
  if exists(key)
    0
  else
    set(key, value)
    1
  end
end

#setrange(key, offset, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 902

def setrange(key, offset, value)
  return unless data[key]
  s = data[key][offset,value.size]
  data[key][s] = value
end

#shutdown ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 969

def shutdown; end

#sinter(*keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 590

def sinter(*keys)
  keys = keys[0] if flatten?(keys)
  raise_argument_error('sinter') if keys.empty?

  keys.each { |k| data_type_check(k, ::Set) }
  return ::Set.new if keys.any? { |k| data[k].nil? }
  keys = keys.map { |k| data[k] || ::Set.new }
  keys.inject do |set, key|
    set & key
  end.to_a
end

#sinterstore(destination, *keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 602

def sinterstore(destination, *keys)
  data_type_check(destination, ::Set)
  result = sinter(*keys)
  data[destination] = ::Set.new(result)
end

#sismember(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 525

def sismember(key, value)
  data_type_check(key, ::Set)
  return false unless data[key]
  data[key].include?(value.to_s)
end

#slaveof(host, port) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 971

def slaveof(host, port) ; end

#smembers(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 519

def smembers(key)
  data_type_check(key, ::Set)
  return [] unless data[key]
  data[key].to_a.reverse
end

#smove(source, destination, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 567

def smove(source, destination, value)
  data_type_check(destination, ::Set)
  result = self.srem(source, value)
  self.sadd(destination, value) if result
  result
end

#spop(key, count = nil) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 574

def spop(key, count = nil)
  data_type_check(key, ::Set)
  results = (count || 1).times.map do
    elem = srandmember(key)
    srem(key, elem)
    elem
  end.compact
  count.nil? ? results.first : results
end

#srandmember(key, number = nil) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 640

def srandmember(key, number=nil)
  number.nil? ? srandmember_single(key) : srandmember_multiple(key, number)
end

#srem(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 550

def srem(key, value)
  data_type_check(key, ::Set)
  return false unless data[key]

  if value.is_a?(Array)
    old_size = data[key].size
    values = value.map(&:to_s)
    values.each { |v| data[key].delete(v) }
    deleted = old_size - data[key].size
  else
    deleted = !!data[key].delete?(value.to_s)
  end

  remove_key_for_empty_collection(key)
  deleted
end

#sscan(key, start_cursor, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 644

def sscan(key, start_cursor, *args)
  data_type_check(key, ::Set)
  return ["0", []] unless data[key]

  match = "*"
  count = 10

  if args.size.odd?
    raise_argument_error('sscan')
  end

  if idx = args.index("MATCH")
    match = args[idx + 1]
  end

  if idx = args.index("COUNT")
    count = args[idx + 1]
  end

  start_cursor = start_cursor.to_i

  cursor = start_cursor
  next_keys = []

  if start_cursor + count >= data[key].length
    next_keys = (data[key].to_a)[start_cursor..-1]
    cursor = 0
  else
    cursor = start_cursor + count
    next_keys = (data[key].to_a)[start_cursor..cursor-1]
  end

  filtered_next_keys = next_keys.select{ |k,v| File.fnmatch(match, k)}
  result = filtered_next_keys.flatten.map(&:to_s)

  return ["#{cursor}", result]
end

#strlen(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 242

def strlen(key)
  return unless data[key]
  data[key].size
end

#subscribe(*channels) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1211

def subscribe(*channels)
  raise_argument_error('subscribe') if channels.empty?()

  #Create messages for all data from the channels
  channel_replies = channels.map do |channel|
    self.class.channels[channel].slice!(0..-1).map!{|v| ["message", channel, v]}
  end
  channel_replies.flatten!(1)
  channel_replies.compact!()

  #Put messages into the replies for the future
  channels.each_with_index do |channel,index|
    replies << ["subscribe", channel, index+1]
  end
  replies.push(*channel_replies)

  #Add unsubscribe message to stop blocking (see https://github.com/redis/redis-rb/blob/v3.2.1/lib/redis/subscribe.rb#L38)
  replies.push(self.unsubscribe())

  replies.pop() #Last reply will be pushed back on
end

#sunion(*keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 608

def sunion(*keys)
  keys = keys[0] if flatten?(keys)
  raise_argument_error('sunion') if keys.empty?

  keys.each { |k| data_type_check(k, ::Set) }
  keys = keys.map { |k| data[k] || ::Set.new }
  keys.inject(::Set.new) do |set, key|
    set | key
  end.to_a
end

#sunionstore(destination, *keys) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 619

def sunionstore(destination, *keys)
  data_type_check(destination, ::Set)
  result = sunion(*keys)
  data[destination] = ::Set.new(result)
end

#sync ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 854

def sync ; end

#time ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 340

def time
  microseconds = (Time.now.to_f * 1000000).to_i
  [ microseconds / 1000000, microseconds % 1000000 ]
end

#timeout=(usecs) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 104

def timeout=(usecs)
end

#ttl(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 730

def ttl(key)
  if data.expires.include?(key) && (ttl = data.expires[key].to_i - Time.now.to_i) > 0
    ttl
  else
    exists(key) ? -1 : -2
  end
end

#type(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 956

def type(key)
  case data[key]
    when nil then "none"
    when String then "string"
    when ZSet then "zset"
    when Hash then "hash"
    when Array then "list"
    when ::Set then "set"
  end
end

#unsubscribe(*channels) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1263

def unsubscribe(*channels)
  if channels.empty?()
    replies << ["unsubscribe", nil, 0]
  else
    channels.each do |channel|
      replies << ["unsubscribe", channel, 0]
    end
  end
  replies.pop() #Last reply will be pushed back on
end

#zadd(key, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1007

def zadd(key, *args)
  if !args.first.is_a?(Array)
    if args.size < 2
      raise_argument_error('zadd')
    elsif args.size.odd?
      raise_syntax_error
    end
  else
    unless args.all? {|pair| pair.size == 2 }
      raise_syntax_error
    end
  end

  data_type_check(key, ZSet)
  data[key] ||= ZSet.new

  if args.size == 2 && !(Array === args.first)
    score, value = args
    exists = !data[key].key?(value.to_s)
    data[key][value.to_s] = score
  else
    # Turn [1, 2, 3, 4] into [[1, 2], [3, 4]] unless it is already
    args = args.each_slice(2).to_a unless args.first.is_a?(Array)
    exists = args.map(&:last).map { |el| data[key].key?(el.to_s) }.count(false)
    args.each { |s, v| data[key][v.to_s] = s }
  end

  exists
end

#zcard(key) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1050

def zcard(key)
  data_type_check(key, ZSet)
  data[key] ? data[key].size : 0
end

#zcount(key, min, max) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1061

def zcount(key, min, max)
  data_type_check(key, ZSet)
  return 0 unless data[key]
  data[key].select_by_score(min, max).size
end

#zincrby(key, num, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1067

def zincrby(key, num, value)
  data_type_check(key, ZSet)
  data[key] ||= ZSet.new
  data[key][value.to_s] ||= 0
  data[key].increment(value.to_s, num)
  data[key][value.to_s].to_s
end

#zinterstore(out, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1197

def zinterstore(out, *args)
  data_type_check(out, ZSet)
  args_handler = SortedSetArgumentHandler.new(args)
  data[out] = SortedSetIntersectStore.new(args_handler, data).call
  data[out].size
end

#zrange(key, start, stop, with_scores = nil) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1089

def zrange(key, start, stop, with_scores = nil)
  data_type_check(key, ZSet)
  return [] unless data[key]

  results = sort_keys(data[key])
  # Select just the keys unless we want scores
  results = results.map(&:first) unless with_scores
  (results[start..stop] || []).flatten.map(&:to_s)
end

#zrangebylex(key, start, stop, *opts) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1099

def zrangebylex(key, start, stop, *opts)
  data_type_check(key, ZSet)
  return [] unless data[key]
  zset = data[key]

  sorted = if zset.identical_scores?
    zset.keys.sort { |x, y| x.to_s <=> y.to_s }
  else
    zset.keys
  end

  range = get_range start, stop, sorted.first, sorted.last

  filtered = []
  sorted.each do |element|
    filtered << element if (range[0][:value]..range[1][:value]).cover?(element)
  end
  filtered.shift if filtered[0] == range[0][:value] && !range[0][:inclusive]
  filtered.pop if filtered.last == range[1][:value] && !range[1][:inclusive]

  limit = get_limit(opts, filtered)
  if limit
    filtered = filtered[limit[0]..-1].take(limit[1])
  end

  filtered
end

#zrangebyscore(key, min, max, *opts) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1142

def zrangebyscore(key, min, max, *opts)
  data_type_check(key, ZSet)
  return [] unless data[key]

  range = data[key].select_by_score(min, max)
  vals = if opts.include?('WITHSCORES')
    range.sort_by {|_,v| v }
  else
    range.keys.sort_by {|k| range[k] }
  end

  limit = get_limit(opts, vals)
  vals = vals[*limit] if limit

  vals.flatten.map(&:to_s)
end

#zrank(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1075

def zrank(key, value)
  data_type_check(key, ZSet)
  z = data[key]
  return unless z
  z.keys.sort_by {|k| z[k] }.index(value.to_s)
end

#zrem(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1037

def zrem(key, value)
  data_type_check(key, ZSet)
  values = Array(value)
  return 0 unless data[key]

  response = values.map do |v|
    data[key].delete(v.to_s) if data[key].has_key?(v.to_s)
  end.compact.size

  remove_key_for_empty_collection(key)
  response
end

#zremrangebyrank(key, start, stop) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1186

def zremrangebyrank(key, start, stop)
  data_type_check(key, ZSet)
  return 0 unless data[key]

  sorted_elements = data[key].sort_by { |k, v| v }
  start = sorted_elements.length if start > sorted_elements.length
  elements_to_delete = sorted_elements[start..stop]
  elements_to_delete.each { |elem, rank| data[key].delete(elem) }
  elements_to_delete.size
end

#zremrangebyscore(key, min, max) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1177

def zremrangebyscore(key, min, max)
  data_type_check(key, ZSet)
  return 0 unless data[key]

  range = data[key].select_by_score(min, max)
  range.each {|k,_| data[key].delete(k) }
  range.size
end

#zrevrange(key, start, stop, with_scores = nil) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1131

def zrevrange(key, start, stop, with_scores = nil)
  data_type_check(key, ZSet)
  return [] unless data[key]

  if with_scores
    data[key].sort_by {|_,v| -v }
  else
    data[key].keys.sort_by {|k| -data[key][k] }
  end[start..stop].flatten.map(&:to_s)
end

#zrevrangebylex(key, start, stop, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1127

def zrevrangebylex(key, start, stop, *args)
  zrangebylex(key, stop, start, args).reverse
end

#zrevrangebyscore(key, max, min, *opts) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1159

def zrevrangebyscore(key, max, min, *opts)
  opts = opts.flatten
  data_type_check(key, ZSet)
  return [] unless data[key]

  range = data[key].select_by_score(min, max)
  vals = if opts.include?('WITHSCORES')
    range.sort_by {|_,v| -v }
  else
    range.keys.sort_by {|k| -range[k] }
  end

  limit = get_limit(opts, vals)
  vals = vals[*limit] if limit

  vals.flatten.map(&:to_s)
end

#zrevrank(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1082

def zrevrank(key, value)
  data_type_check(key, ZSet)
  z = data[key]
  return unless z
  z.keys.sort_by {|k| -z[k] }.index(value.to_s)
end

#zscan(key, start_cursor, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1285

def zscan(key, start_cursor, *args)
  data_type_check(key, ZSet)
  return [] unless data[key]

  match = "*"
  count = 10

  if args.size.odd?
    raise_argument_error('zscan')
  end

  if idx = args.index("MATCH")
    match = args[idx + 1]
  end

  if idx = args.index("COUNT")
    count = args[idx + 1]
  end

  start_cursor = start_cursor.to_i
  data_type_check(start_cursor, Integer)

  cursor = start_cursor
  next_keys = []

  sorted_keys = sort_keys(data[key])

  if start_cursor + count >= sorted_keys.length
    next_keys = sorted_keys.to_a.select { |k| File.fnmatch(match, k[0]) } [start_cursor..-1]
    cursor = 0
  else
    cursor = start_cursor + count
    next_keys = sorted_keys.to_a.select { |k| File.fnmatch(match, k[0]) } [start_cursor..cursor-1]
  end
  return "#{cursor}", next_keys.flatten.map(&:to_s)
end

#zscan_each(key, *args, &block) ⇒ Object

Originally from redis-rb



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# File 'lib/redis/connection/memory.rb', line 1323

def zscan_each(key, *args, &block)
  data_type_check(key, ZSet)
  return [] unless data[key]

  return to_enum(:zscan_each, key, options) unless block_given?
  cursor = 0
  loop do
    cursor, values = zscan(key, cursor, options)
    values.each(&block)
    break if cursor == "0"
  end
end

#zscore(key, value) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1055

def zscore(key, value)
  data_type_check(key, ZSet)
  value = data[key] && data[key][value.to_s]
  value && value.to_s
end

#zunionstore(out, *args) ⇒ Object 



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# File 'lib/redis/connection/memory.rb', line 1204

def zunionstore(out, *args)
  data_type_check(out, ZSet)
  args_handler = SortedSetArgumentHandler.new(args)
  data[out] = SortedSetUnionStore.new(args_handler, data).call
  data[out].size
end