Class: Familia::Horreum

Inherits:
Object
  • Object
show all
Includes:
Base, Commands, Connection, Serialization, Settings, Utils
Defined in:
lib/familia/horreum.rb,
lib/familia/horreum/utils.rb,
lib/familia/horreum/commands.rb,
lib/familia/horreum/settings.rb,
lib/familia/horreum/connection.rb,
lib/familia/horreum/class_methods.rb,
lib/familia/horreum/serialization.rb,
lib/familia/horreum/related_fields_management.rb

Overview

Familia::Horreum

Defined Under Namespace

Modules: ClassMethods, Commands, Connection, RelatedFieldsManagement, Serialization, Settings, Utils

Class Attribute Summary collapse

Instance Attribute Summary collapse

Attributes included from Connection

#uri

Attributes included from Settings

#dump_method, #load_method, #suffix

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Serialization

#apply_fields, #batch_update, #clear_fields!, #commit_fields, #deserialize_value, #destroy!, #refresh, #refresh!, #save, #serialize_value, #to_a, #to_h

Methods included from Connection

#connect, #pipeline, #transaction

Methods included from Settings

#logical_database, #logical_database=, #opts

Methods included from Commands

#current_expiration, #datatype, #decr, #decrby, #delete!, #exists?, #expire, #field_count, #hget, #hgetall, #hkeys, #hmset, #hset, #hstrlen, #hvals, #incr, #incrby, #incrbyfloat, #key?, #move, #prefix, #remove_field

Methods included from Utils

#dbkey, #join, #uri

Methods included from Base

add_feature, #update_expiration, #uuid

Constructor Details

#initialize(*args, **kwargs) ⇒ Horreum

Instance initialization This method sets up the object’s state, including Redis-related data.

Usage:

Session.new(“abc123”, “user456”) # positional (brittle) Session.new(sessid: “abc123”, custid: “user456”) # hash (robust) Session.new(“abc123”, custid: “user456”) # legacy hash (robust)



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# File 'lib/familia/horreum.rb', line 85

def initialize(*args, **kwargs)
  Familia.ld "[Horreum] Initializing #{self.class}"
  initialize_relatives

  # No longer auto-create a key field - the identifier method will
  # directly use the field specified by identifier_field

  # Detect if first argument is a hash (legacy support)
  if args.size == 1 && args.first.is_a?(Hash) && kwargs.empty?
    kwargs = args.first
    args = []
  end

  # Initialize object with arguments using one of three strategies:
  #
  # 1. **Keyword Arguments** (Recommended): Order-independent field assignment
  #    Example: Customer.new(name: "John", email: "john@example.com")
  #    - Robust against field reordering
  #    - Self-documenting
  #    - Only sets provided fields
  #
  # 2. **Positional Arguments** (Legacy): Field assignment by definition order
  #    Example: Customer.new("john@example.com", "password123")
  #    - Brittle: breaks if field order changes
  #    - Compact syntax
  #    - Maps to fields in class definition order
  #
  # 3. **No Arguments**: Object created with all fields as nil
  #    - Minimal memory footprint in Redis
  #    - Fields set on-demand via accessors or save()
  #    - Avoids default value conflicts with nil-skipping serialization
  #
  # Note: We iterate over self.class.fields (not kwargs) to ensure only
  # defined fields are set, preventing typos from creating undefined attributes.
  #
  if kwargs.any?
    initialize_with_keyword_args(**kwargs)
  elsif args.any?
    initialize_with_positional_args(*args)
  else
    Familia.ld "[Horreum] #{self.class} initialized with no arguments"
    # Default values are intentionally NOT set here to:
    # - Maintain Database memory efficiency (only store non-nil values)
    # - Avoid conflicts with nil-skipping serialization logic
    # - Preserve consistent exists? behavior (empty vs default-filled objects)
    # - Keep initialization lightweight for unused fields
  end

  # Implementing classes can define an init method to do any
  # additional initialization. Notice that this is called
  # after the fields are set.
  init if respond_to?(:init)
end

Class Attribute Details

.dbclient=(value) ⇒ Object (writeonly)

TODO: Where are we calling dbclient= from now with connection pool?



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

def dbclient=(value)
  @dbclient = value
end

.dump_method=(value) ⇒ Object (writeonly)

TODO: Where are we calling dbclient= from now with connection pool?



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

def dump_method=(value)
  @dump_method = value
end

.has_relations ⇒ Object (readonly)

Returns the value of attribute has_relations.



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# File 'lib/familia/horreum.rb', line 60

def has_relations
  @has_relations
end

.load_method=(value) ⇒ Object (writeonly)

TODO: Where are we calling dbclient= from now with connection pool?



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

def load_method=(value)
  @load_method = value
end

.parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/familia/horreum.rb', line 57

def parent
  @parent
end

.valid_command_return_values ⇒ Object (readonly)

Returns the value of attribute valid_command_return_values.



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# File 'lib/familia/horreum/serialization.rb', line 32

def valid_command_return_values
  @valid_command_return_values
end

Instance Attribute Details

#dbclient ⇒ Redis

Summon the mystical Database connection from the depths of instance or class.

This method is like a magical divining rod, always pointing to the nearest source of Database goodness. It first checks if we have a personal Redis connection (@dbclient), and if not, it borrows the class’s connection.

Examples:

Finding your Database way

puts object.dbclient
# => #<Redis client v5.4.1 for redis://localhost:6379/0>

Returns:

  • (Redis) —

    A shimmering Database connection, ready for your bidding.



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# File 'lib/familia/horreum.rb', line 285

def dbclient
  conn = Fiber[:familia_transaction] || @dbclient || self.class.dbclient
  # conn.select(self.class.logical_database)
  conn
end

Class Method Details

.inherited(member) ⇒ Object

Extends ClassMethods to subclasses and tracks Familia members



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

def inherited(member)
  Familia.trace :HORREUM, nil, "Welcome #{member} to the family", caller(1..1) if Familia.debug?
  member.extend(ClassMethods)
  member.extend(Connection)
  member.extend(Features)

  # Tracks all the classes/modules that include Familia. It's
  # 10pm, do you know where you Familia members are?
  Familia.members << member
  super
end

Instance Method Details

#generate_id ⇒ Object 



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# File 'lib/familia/horreum.rb', line 291

def generate_id
  @objid ||= Familia.generate_id # rubocop:disable Naming/MemoizedInstanceVariableName
end

#identifier ⇒ Object

Determines the unique identifier for the instance This method is used to generate dbkeys for the object Returns nil for unsaved objects (following standard ORM patterns)



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# File 'lib/familia/horreum.rb', line 252

def identifier
  definition = self.class.identifier_field
  return nil if definition.nil?

  # Call the identifier field or proc (validation already done at class definition time)
  unique_id = case definition
              when Symbol, String
                send(definition)
              when Proc
                definition.call(self)
              end

  # Return nil for unpopulated identifiers (like unsaved ActiveRecord objects)
  # Only raise errors when the identifier is actually needed for Redis operations
  return nil if unique_id.nil? || unique_id.to_s.empty?

  unique_id
end

#initialize_relatives ⇒ Object

Sets up related Database objects for the instance This method is crucial for establishing Redis-based relationships

This needs to be called in the initialize method.



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

def initialize_relatives
  # Generate instances of each DataType. These need to be
  # unique for each instance of this class so they can piggyback
  # on the specifc index of this instance.
  #
  # i.e.
  #     familia_object.dbkey              == v1:bone:INDEXVALUE:object
  #     familia_object.related_object.dbkey == v1:bone:INDEXVALUE:name
  #
  self.class.related_fields.each_pair do |name, datatype_definition|
    klass = datatype_definition.klass
    opts = datatype_definition.opts
    Familia.ld "[#{self.class}] initialize_relatives #{name} => #{klass} #{opts.keys}"

    # As a subclass of Familia::Horreum, we add ourselves as the parent
    # automatically. This is what determines the dbkey for DataType
    # instance and which database connection.
    #
    #   e.g. If the parent's dbkey is `customer:customer_id:object`
    #     then the dbkey for this DataType instance will be
    #     `customer:customer_id:name`.
    #
    opts[:parent] = self # unless opts.key(:parent)

    suffix_override = opts.fetch(:suffix, name)

    # Instantiate the DataType object and below we store it in
    # an instance variable.
    related_object = klass.new suffix_override, opts

    # Freezes the related_object, making it immutable.
    # This ensures the object's state remains consistent and prevents any modifications,
    # safeguarding its integrity and making it thread-safe.
    # Any attempts to change the object after this will raise a FrozenError.
    related_object.freeze

    # e.g. customer.name  #=> `#<Familia::HashKey:0x0000...>`
    instance_variable_set :"@#{name}", related_object
  end
end

#initialize_with_keyword_args_deserialize_value(**fields) ⇒ Object 



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# File 'lib/familia/horreum.rb', line 225

def initialize_with_keyword_args_deserialize_value(**fields)
  # Deserialize Database string values back to their original types
  deserialized_fields = fields.transform_values { |value| deserialize_value(value) }
  initialize_with_keyword_args(**deserialized_fields)
end

#optimistic_refresh(**fields) ⇒ Array

A thin wrapper around the private initialize method that accepts a field hash and refreshes the existing object.

This method is part of horreum.rb rather than serialization.rb because it operates solely on the provided values and doesn’t query Database or other external sources. That’s why it’s called “optimistic” refresh: it assumes the provided values are correct and updates the object accordingly.

Parameters:

  • fields (Hash) —

    A hash of field names and their new values to update the object with.

Returns:

  • (Array) —

    The list of field names that were updated.

See Also:



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# File 'lib/familia/horreum.rb', line 244

def optimistic_refresh(**fields)
  Familia.ld "[optimistic_refresh] #{self.class} #{dbkey} #{fields.keys}"
  initialize_with_keyword_args_deserialize_value(**fields)
end

#to_s ⇒ Object

The principle is: If Familia objects have to_s, then they should work everywhere strings are expected, including as Database hash field names.



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# File 'lib/familia/horreum.rb', line 297

def to_s
  # Enable polymorphic string usage for Familia objects
  # This allows passing Familia objects directly where strings are expected
  # without requiring explicit .identifier calls
  return super if identifier.to_s.empty?
  identifier.to_s
end