Class: RDF::Mongo::Repository

Inherits:
Repository
  • Object
show all
Defined in:
lib/rdf/mongo.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(**options, &block) ⇒ Repository #initialize(**options, &block) ⇒ Repository

Initializes this repository instance.

Overloads:

  • #initialize(**options, &block) ⇒ Repository

    Parameters:

    • options (Hash{Symbol => Object})

    Options Hash (**options):

    • :title (String, #to_s) — default: nil
    • :uri (URI, #to_s) — default: nil —

      URI in the form mongodb://host:port/db. The URI should also identify the collection use, but appending a collection path component such as mongodb://host:port/db/collection, this ensures that the collection will be maintained if cloned. See Mongo::Client options for more information on Mongo URIs.

  • #initialize(**options, &block) ⇒ Repository

    Parameters:

    • options (Hash{Symbol => Object}) —

      See Mongo::Client options for more information on Mongo Client options.

    Options Hash (**options):

    • :title (String, #to_s) — default: nil
    • :host (String) —

      a single address or an array of addresses, which may contain a port designation

    • :port (Integer) — default: 27017 —

      applied to host address(es)

    • :database (String) — default: 'quadb'
    • :collection (String) — default: 'quads'

Yields:

  • (repository)

Yield Parameters:



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# File 'lib/rdf/mongo.rb', line 139

def initialize(**options, &block)
  collection = nil
  if options[:uri]
    options = options.dup
    uri = RDF::URI(options.delete(:uri))
    _, db, coll = uri.path.split('/')
    collection = coll || options.delete(:collection)
    db ||= "quadb"
    uri.path = "/#{db}" if coll
    @client = ::Mongo::Client.new(uri.to_s, **options)
  else
    warn "[DEPRECATION] RDF::Mongo::Repository#initialize expects a uri argument. Called from #{Gem.location_of_caller.join(':')}" unless options.empty?
    options[:database] ||= options.delete(:db) # 1.x compat
    options[:database] ||= 'quadb'
    hosts = Array(options[:host] || 'localhost')
    hosts.map! {|h| "#{h}:#{options[:port]}"} if options[:port]
    @client = ::Mongo::Client.new(hosts, **options)
  end

  @collection = @client[options.delete(:collection) || 'quads']
  @collection.indexes.create_many([
    {key: {s: 1}},
    {key: {p: 1}},
    {key: {o: "hashed"}},
    {key: {c: 1}},
    {key: {s: 1, p: 1}},
    #{key: {s: 1, o: "hashed"}}, # Muti-key hashed indexes not allowed
    #{key: {p: 1, o: "hashed"}}, # Muti-key hashed indexes not allowed
  ])
  super(**options, &block)
end

Instance Attribute Details

#client ⇒ Mongo::DB (readonly)

The Mongo database instance

Returns:

  • (Mongo::DB) 


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# File 'lib/rdf/mongo.rb', line 112

def client
  @client
end

#collection ⇒ Mongo::Collection (readonly)

The collection used for storing quads

Returns:

  • (Mongo::Collection) 


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# File 'lib/rdf/mongo.rb', line 116

def collection
  @collection
end

Instance Method Details

#apply_changeset(changeset) ⇒ Object 



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# File 'lib/rdf/mongo.rb', line 182

def apply_changeset(changeset)
  ops = []

  changeset.deletes.each do |d|
    ops << { delete_one: { filter: statement_to_delete(d)} }
  end

  changeset.inserts.each do |i|
    ops << { update_one: { filter: statement_to_insert(i), update: statement_to_insert(i), upsert: true} }
  end

  @collection.bulk_write(ops, ordered: true)
end

#clear_statements ⇒ Object 



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# File 'lib/rdf/mongo.rb', line 224

def clear_statements
  @collection.delete_many
end

#delete_statement(statement) ⇒ Object

See Also:

  • RDF::Mutable#delete_statement


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# File 'lib/rdf/mongo.rb', line 202

def delete_statement(statement)
  st_mongo = statement_to_delete(statement)
  @collection.delete_one(st_mongo)
end

#insert_statement(statement) ⇒ Object 



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# File 'lib/rdf/mongo.rb', line 196

def insert_statement(statement)
  st_mongo = statement_to_insert(statement)
  @collection.update_one(st_mongo, st_mongo, upsert: true)
end

#supports?(feature) ⇒ Boolean

Returns:

  • (Boolean)

See Also:

  • RDF::Mutable#insert_statement


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# File 'lib/rdf/mongo.rb', line 172

def supports?(feature)
  case feature.to_sym
    when :graph_name        then true
    when :atomic_write      then true
    when :validity          then @options.fetch(:with_validity, true)
    when :literal_equality  then true
    else false
  end
end