Class: BELParser::Resource::EagerSPARQLReader

Inherits:
SPARQLReader
  • Object
show all
Defined in:
lib/bel_parser/resource/eager_sparql_reader.rb

Overview

EagerSPARQLReader

Constant Summary

Constants inherited from SPARQLReader

SPARQLReader::ALLOW_HEADER, SPARQLReader::SCHEMES

Instance Method Summary collapse

Methods included from Reader

assert_reader

Constructor Details

#initialize(sparql_endpoint_url, validate_url = true) ⇒ EagerSPARQLReader

Returns a new instance of EagerSPARQLReader.



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# File 'lib/bel_parser/resource/eager_sparql_reader.rb', line 9

def initialize(sparql_endpoint_url, validate_url = true)
  @resources = Concurrent::Hash.new
  @locks     = Concurrent::Hash.new
  super
end

Instance Method Details

#retrieve_resource(resource_identifier) ⇒ Object 



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# File 'lib/bel_parser/resource/eager_sparql_reader.rb', line 15

def retrieve_resource(resource_identifier)
  if @resources.key?(resource_identifier)
    concepts = @resources[resource_identifier]
    concepts[value]
  else
    lock = @locks[resource_identifier] ||= Mutex.new
    if lock.try_lock
      Thread.new do
        concepts = retrieve_values_from_resource(resource_identifier).to_a
        @resources[resource_identifier] = 
          Hash[
            concepts.map do |c|
              [c.name, c]
            end
          ]
        lock.unlock
      end
    end

    super
  end
end

#retrieve_value_from_resource(resource_identifier, value) ⇒ Object 



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# File 'lib/bel_parser/resource/eager_sparql_reader.rb', line 38

def retrieve_value_from_resource(resource_identifier, value)
  concepts = @resources[resource_identifier]
  return super unless concepts
  concepts[value]
end

#retrieve_values_from_resource(resource_identifier) ⇒ Object 



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# File 'lib/bel_parser/resource/eager_sparql_reader.rb', line 44

def retrieve_values_from_resource(resource_identifier)
  concepts = @resources[resource_identifier]
  return super unless concepts
  concepts
end