Class: Familia::RedisType

Inherits:
Object
  • Object
show all
Extended by:
Features
Includes:
Base, Commands, Serialization
Defined in:
lib/familia/redistype.rb,
lib/familia/redistype/commands.rb,
lib/familia/redistype/serialization.rb

Overview

rubocop:disable all

Direct Known Subclasses

HashKey, List, Set, SortedSet, String

Defined Under Namespace

Modules: Commands, Serialization

Class Attribute Summary collapse

Instance Attribute Summary collapse

Attributes included from Features

#features_enabled

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Features

feature

Methods included from Serialization

#from_redis, #multi_from_redis, #multi_from_redis_with_nil, #to_redis

Methods included from Commands

#delete!, #echo, #exists?, #expire, #expireat, #move, #persist, #realttl, #rename, #renamenx, #type

Methods included from Base

add_feature, #generate_id, #update_expiration, #uuid

Constructor Details

#initialize(keystring, opts = {}) ⇒ RedisType

keystring: If parent is set, this will be used as the suffix for rediskey. Otherwise this becomes the value of the key. If this is an Array, the elements will be joined.

Options:

:class => A class that responds to Familia.load_method and Familia.dump_method. These will be used when loading and saving data from/to redis to unmarshal/marshal the class.

:parent => The Familia object that this redistype object belongs to. This can be a class that includes Familia or an instance.

:ttl => the time to live in seconds. When not nil, this will set the redis expire for this key whenever #save is called. You can also call it explicitly via #update_expiration.

:default => the default value (String-only)

:db => the redis database to use (ignored if :redis is used).

:redis => an instance of Redis.

:key => a hardcoded key to use instead of the deriving the from the name and parent (e.g. a derived key: customer:custid:secret_counter).

Uses the redis connection of the parent or the value of opts or Familia.redis (in that order).



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# File 'lib/familia/redistype.rb', line 94

def initialize(keystring, opts = {})
  #Familia.ld " [initializing] #{self.class} #{opts}"
  @keystring = keystring
  @keystring = @keystring.join(Familia.delim) if @keystring.is_a?(Array)

  # Remove all keys from the opts that are not in the allowed list
  @opts = opts || {}
  @opts = RedisType.valid_keys_only(@opts)

  # Apply the options to instance method setters of the same name
  @opts.each do |k, v|
    Familia.ld " [setting] #{k} #{v}"
    send(:"#{k}=", v) if respond_to? :"#{k}="
  end

  init if respond_to? :init
end

Class Attribute Details

.db(val = nil) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 39

def db(val = nil)
  @db = val unless val.nil?
  @db || parent&.db
end

.parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/familia/redistype.rb', line 27

def parent
  @parent
end

.registered_types ⇒ Object (readonly)

Returns the value of attribute registered_types.



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# File 'lib/familia/redistype.rb', line 26

def registered_types
  @registered_types
end

.uri(val = nil) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 44

def uri(val = nil)
  @uri = val unless val.nil?
  @uri || (parent ? parent.uri : Familia.uri)
end

.valid_options ⇒ Object (readonly)

Returns the value of attribute valid_options.



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# File 'lib/familia/redistype.rb', line 26

def valid_options
  @valid_options
end

Instance Attribute Details

#dump_method ⇒ Object 



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# File 'lib/familia/redistype.rb', line 196

def dump_method
  @dump_method || self.class.dump_method
end

#keystring ⇒ Object (readonly)

Returns the value of attribute keystring.



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# File 'lib/familia/redistype.rb', line 63

def keystring
  @keystring
end

#load_method ⇒ Object 



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# File 'lib/familia/redistype.rb', line 200

def load_method
  @load_method || self.class.load_method
end

#opts ⇒ Object (readonly)

Returns the value of attribute opts.



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# File 'lib/familia/redistype.rb', line 63

def opts
  @opts
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/familia/redistype.rb', line 63

def parent
  @parent
end

Class Method Details

.inherited(obj) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 49

def inherited(obj)
  Familia.trace :REDISTYPE, nil, "#{obj} is my kinda type", caller(1..1) if Familia.debug?
  obj.db = db
  obj.ttl = ttl # method added via Features::Expiration
  obj.uri = uri
  obj.parent = self
  super(obj)
end

.register(klass, methname) ⇒ Object

To be called inside every class that inherits RedisType methname is the term used for the class and instance methods that are created for the given klass (e.g. set, list, etc)



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# File 'lib/familia/redistype.rb', line 33

def register(klass, methname)
  Familia.ld "[#{self}] Registering #{klass} as #{methname.inspect}"

  @registered_types[methname] = klass
end

.valid_keys_only(opts) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 58

def valid_keys_only(opts)
  opts.select { |k, _| RedisType.valid_options.include? k }
end

Instance Method Details

#class? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/familia/redistype.rb', line 168

def class?
  !@opts[:class].to_s.empty? && @opts[:class].is_a?(Familia)
end

#db ⇒ Object 



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# File 'lib/familia/redistype.rb', line 188

def db
  @opts[:db] || self.class.db
end

#parent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/familia/redistype.rb', line 180

def parent?
  parent_class? || parent_instance?
end

#parent_class? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/familia/redistype.rb', line 176

def parent_class?
  parent.is_a?(Class) && parent <= Familia::Horreum
end

#parent_instance? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/familia/redistype.rb', line 172

def parent_instance?
  parent.is_a?(Familia::Horreum)
end

#redis ⇒ Object 



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# File 'lib/familia/redistype.rb', line 112

def redis
  return @redis if @redis

  parent? ? parent.redis : Familia.redis(opts[:db])
end

#rediskey ⇒ String

Produces the full Redis key for this object.

This method determines the appropriate Redis key based on the context of the RedisType object:

  1. If a hardcoded key is set in the options, it returns that key.

  2. For instance-level RedisType objects, it uses the parent instance’s rediskey method.

  3. For class-level RedisType objects, it uses the parent class’s rediskey method.

  4. For standalone RedisType objects, it uses the keystring as the full Redis key.

For class-level RedisType objects (parent_class? == true):

  • The suffix is optional and used to differentiate between different types of objects.

  • If no suffix is provided, the class’s default suffix is used (via the self.suffix method).

  • If a nil suffix is explicitly passed, it won’t appear in the resulting Redis key.

  • Passing nil as the suffix is how class-level RedisType objects are created without the global default ‘object’ suffix.

Examples:

Instance-level RedisType

user_instance.some_redistype.rediskey  # => "user:123:some_redistype"

Class-level RedisType

User.some_redistype.rediskey  # => "user:some_redistype"

Standalone RedisType

RedisType.new("mykey").rediskey  # => "mykey"

Class-level RedisType with explicit nil suffix

User.rediskey("123", nil)  # => "user:123"

Returns:

  • (String) —

    The full Redis key.



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# File 'lib/familia/redistype.rb', line 148

def rediskey
  # Return the hardcoded key if it's set. This is useful for
  # support legacy keys that aren't derived in the same way.
  return opts[:key] if opts[:key]

  if parent_instance?
    # This is an instance-level redistype object so the parent instance's
    # rediskey method is defined in Familia::Horreum::InstanceMethods.
    parent.rediskey(keystring)
  elsif parent_class?
    # This is a class-level redistype object so the parent class' rediskey
    # method is defined in Familia::Horreum::ClassMethods.
    parent.rediskey(keystring, nil)
  else
    # This is a standalone RedisType object where it's keystring
    # is the full redis key.
    keystring
  end
end

#uri ⇒ Object 



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# File 'lib/familia/redistype.rb', line 192

def uri
  @opts[:uri] || self.class.uri
end