Module: RDF::Repository::Implementation

Defined in:
vendor/bundler/ruby/2.7.0/bundler/gems/rdf-0e84e3dd0307/lib/rdf/repository.rb

Overview

A default Repository implementation supporting atomic writes and serializable transactions.

See Also:

Defined Under Namespace

Classes: SerializedTransaction

Constant Summary collapse

DEFAULT_GRAPH = 
false

Instance Method Summary collapse

Instance Method Details

#apply_changeset(changeset) ⇒ Object

See Also:



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# File 'vendor/bundler/ruby/2.7.0/bundler/gems/rdf-0e84e3dd0307/lib/rdf/repository.rb', line 343

def apply_changeset(changeset)
  data = @data
  changeset.deletes.each do |del|
    if del.constant?
      data = delete_from(data, del)
    else
      # we need this condition to handle wildcard statements
      query_pattern(del) { |stmt| data = delete_from(data, stmt) }
    end
  end
  changeset.inserts.each { |ins| data = insert_to(data, ins) }
  @data = data
end

#isolation_level ⇒ Object

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# File 'vendor/bundler/ruby/2.7.0/bundler/gems/rdf-0e84e3dd0307/lib/rdf/repository.rb', line 359

def isolation_level
  :serializable
end

#snapshot ⇒ Dataset

A readable & queryable snapshot of the repository for isolated reads.

Returns:

  • (Dataset) —

    an immutable Dataset containing a current snapshot of the Repository contents.

See Also:



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# File 'vendor/bundler/ruby/2.7.0/bundler/gems/rdf-0e84e3dd0307/lib/rdf/repository.rb', line 370

def snapshot
  self.class.new(data: @data).freeze
end