Class: Dbtools::Dump

Inherits:
Thor
  • Object
show all
Defined in:
lib/tasks/dump.rb

Instance Method Summary collapse

Instance Method Details

#blazegraph(url, file) ⇒ Object 



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# File 'lib/tasks/dump.rb', line 67

def blazegraph(url, file)
  uri = URI(url)
  params = { :compress => options[:compress],
             :file => file }
  uri.query = URI.encode_www_form(params)
  res = Net::HTTP.get_response(uri)
end

#rdf(sparql_endpoint, filename) ⇒ Object 



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# File 'lib/tasks/dump.rb', line 21

def rdf(sparql_endpoint, filename)
  repo = SPARQL::Client::Repository.new(uri: sparql_endpoint)

  # Use temp name when compressing
  if options[:compress]
    target = filename + '_tmp.nt'
    STDERR.puts %q[Warning: compress option is selected, but filename doesn't end with .gz.
You should change the name to end in .gz if you want to open it.] if File.extname(filename) != '.gz'
  else
    target = filename
  end

  RDF::Writer.open(target, format: :ntriples) do |w|
    repo.each {|stmt| w << stmt}
  end

  # Zlib::GzipWriter can't wrap around RDF::Writer, because RDF::Writer is not a IO-like object...
  if options[:compress]
    # Compress the file using gz
    Zlib::GzipWriter.open(filename) do |gz|
      # Write in chunks.
      File.open(target) do |fp|
        while chunk = fp.read(16 * 1024) do
          gz.write chunk
        end
      end
      gz.close
    end
    # Delete the original file after generating the compressed version.
    File.delete(target) if File.exists?(target)
  end
end

#schema(url, path) ⇒ Object 



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# File 'lib/tasks/dump.rb', line 78

def schema(url, path)
  adapter, user, password, host, database = url.match("^([a-zA-Z0-9]+):\/\/(.+):(.+)@(.+)\/(.+)").captures
  case adapter
    when "mysql2"
      dump_mysql_schema(user, password, database, host, path)
    when "postgres"
      dump_postgresql_schema(user, password, database, host, path)
    else
      puts "Not supported database"
  end
end