Class: RdfStore

Inherits:
Object
  • Object
show all
Defined in:
app/models/rdf_store.rb

Overview

Copyright 2011 innoQ Deutschland GmbH

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Constant Summary collapse

@@conn = 
nil

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(graph_uri, ttl_url, do_delete, ttl_content = nil) ⇒ RdfStore

Returns a new instance of RdfStore.



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# File 'app/models/rdf_store.rb', line 33

def initialize(graph_uri, ttl_url, do_delete, ttl_content = nil)
  if Rails.application.config.virtuoso_jdbc_driver_url
    @graph_uri = graph_uri
    @ttl_url = ttl_url
    @ttl_content = ttl_content
    @do_delete = do_delete

    Rails.logger.info("** [RdfStore] Beginning virtuoso sync. Insert turtle into graph <#{@graph_uri}> from url: #{@ttl_url}; Clear graph first: #{@do_delete}.")

    unless @@conn
      # import "virtuoso.jdbc3.Driver"
      java.lang.Class.forName("virtuoso.jdbc3.Driver", true, JRuby.runtime.jruby_class_loader)
      @@conn = java.sql.DriverManager.getConnection(Rails.application.config.virtuoso_jdbc_driver_url)
      Rails.logger.debug("** [RdfStore] JDBC connection is up.")
    end

    if Rails.application.config.virtuoso_sync_threaded
      Rails.logger.debug("** [RdfStore] Starting sync thread.")
      java.lang.Thread.new(self).start
    else
      self.run
    end
  end
end

Class Method Details

.delete(graph_uri) ⇒ Object 



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# File 'app/models/rdf_store.rb', line 70

def self.delete(graph_uri)
  return false unless Rails.application.config.virtuoso_jdbc_driver_url
  RdfStore.new(graph_uri, nil, true)
  true
end

.insert(graph_uri, ttl_url) ⇒ Object 



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# File 'app/models/rdf_store.rb', line 58

def self.insert(graph_uri, ttl_url)
  return false unless Rails.application.config.virtuoso_jdbc_driver_url
  RdfStore.new(graph_uri, ttl_url, false)
  true
end

.mass_import(graph_uri, turtle_content) ⇒ Object 



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# File 'app/models/rdf_store.rb', line 76

def self.mass_import(graph_uri, turtle_content)
  return false unless Rails.application.config.virtuoso_jdbc_driver_url
  RdfStore.new(graph_uri, nil, true, turtle_content)
  true
end

.update(graph_uri, ttl_url) ⇒ Object 



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# File 'app/models/rdf_store.rb', line 64

def self.update(graph_uri, ttl_url)
  return false unless Rails.application.config.virtuoso_jdbc_driver_url
  RdfStore.new(graph_uri, ttl_url, true)
  true
end

Instance Method Details

#run ⇒ Object 



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# File 'app/models/rdf_store.rb', line 82

def run
  if (@do_delete)
    Rails.logger.debug("** [RdfStore] Executing SPARQL DELETE.")
    @@conn.createStatement().execute("SPARQL CLEAR GRAPH <#{@graph_uri}>")
  end
  if (@ttl_url)
    Rails.logger.debug("** [RdfStore] Executing turtle load from url.")
    @@conn.createStatement().execute("DB.DBA.TTLP(HTTP_GET('#{@ttl_url}'), '', '#{@graph_uri}')")
  end
  if (@ttl_content)
    @@conn.createStatement().execute("DB.DBA.TTLP('#{@ttl_content.gsub("\\", "\\\\\\").gsub("'", "\\\\'")}', '', '#{@graph_uri}')")
  end
  Rails.logger.info("** [RdfStore] Virtuoso sync done.")
end