Class: Familia::RedisType

Inherits:
Object
  • Object
show all
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

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Serialization

#from_redis, #multi_from_redis, #multi_from_redis_with_nil, #to_redis, #update_expiration

Methods included from Commands

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

Methods included from Base

add_feature

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 95

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)

  init if respond_to? :init
end

Class Attribute Details

.db(val = nil) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 41

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 24

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 23

def registered_types
  @registered_types
end

.ttl(val = nil) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 36

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

.uri(val = nil) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 46

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 23

def valid_options
  @valid_options
end

Instance Attribute Details

#dump_method ⇒ Object 



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

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 64

def keystring
  @keystring
end

#load_method ⇒ Object 



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

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 64

def opts
  @opts
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/familia/redistype.rb', line 64

def parent
  @parent
end

Class Method Details

.inherited(obj) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 51

def inherited(obj)
  obj.db = db
  obj.ttl = ttl
  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 30

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

  @registered_types[methname] = klass
end

.valid_keys_only(opts) ⇒ Object 



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# File 'lib/familia/redistype.rb', line 59

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 136

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 160

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

#parent? ⇒ Boolean

Returns:

  • (Boolean) 


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

def parent?
  parent_class? || parent_instance?
end

#parent_class? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/familia/redistype.rb', line 144

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 140

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

#redis ⇒ Object 



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# File 'lib/familia/redistype.rb', line 107

def redis
  return @redis if @redis

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

#rediskey ⇒ Object

Produces the full redis key for this object.



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# File 'lib/familia/redistype.rb', line 114

def rediskey
  Familia.ld "[rediskey] #{keystring} for #{self.class} (#{opts})"

  # 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 key.
    keystring
  end
end

#ttl ⇒ Object 



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# File 'lib/familia/redistype.rb', line 156

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

#uri ⇒ Object 



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# File 'lib/familia/redistype.rb', line 164

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