class GoodData::CloudResources::MysqlClient

Constants

JDBC_MYSQL_PATTERN
JDBC_MYSQL_PROTOCOL
MONGO_BI_FETCH_SIZE
MONGO_BI_TYPE
MYSQL_DEFAULT_PORT
MYSQL_FETCH_SIZE
PREFER
REQUIRE
VERIFY_FULL

Public Class Methods

accept?(type) click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 32
def accept?(type)
  type == 'mysql'
end
new(options = {}) click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 37
def initialize(options = {})
  raise("Data Source needs a client to Mysql to be able to query the storage but 'mysql_client' is empty.") unless options['mysql_client']

  if options['mysql_client']['connection'].is_a?(Hash)
    @database = options['mysql_client']['connection']['database']
    @authentication = options['mysql_client']['connection']['authentication']
    @ssl_mode = options['mysql_client']['connection']['sslMode']
    @database_type = options['mysql_client']['connection']['databaseType']
    raise "SSL Mode should be prefer, require and verify-full" unless @ssl_mode == 'prefer' || @ssl_mode == 'require' || @ssl_mode == 'verify-full'

    @url = build_url(options['mysql_client']['connection']['url'])
  else
    raise('Missing connection info for Mysql client')
  end

  Java.com.mysql.jdbc.Driver
end

Public Instance Methods

add_extended() click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 116
def add_extended
  @database_type == MONGO_BI_TYPE ? '&authenticationPlugins=org.mongodb.mongosql.auth.plugin.MongoSqlAuthenticationPlugin&useLocalTransactionState=true' : ''
end
build_url(url) click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 91
def build_url(url)
  matches = url.scan(JDBC_MYSQL_PATTERN)
  raise 'Cannot reach the url' unless matches

  host = matches[0][0]
  port = matches[0][2]&.to_i || MYSQL_DEFAULT_PORT

  "#{JDBC_MYSQL_PROTOCOL}#{host}:#{port}/#{@database}?#{get_ssl_mode(@ssl_mode)}#{add_extended}&useCursorFetch=true&enabledTLSProtocols=TLSv1.2"
end
connect() click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 81
def connect
  GoodData.logger.info "Setting up connection to Mysql #{@database_type} #{@url} "

  prop = java.util.Properties.new
  prop.setProperty('user', @authentication['basic']['userName'])
  prop.setProperty('password', @authentication['basic']['password'])
  @connection = java.sql.DriverManager.getConnection(@url, prop)
  @connection.set_auto_commit(false)
end
fetch_size() click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 101
def fetch_size
  @database_type == MONGO_BI_TYPE ? MONGO_BI_FETCH_SIZE : MYSQL_FETCH_SIZE
end
get_ssl_mode(ssl_mode) click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 105
def get_ssl_mode(ssl_mode)
  mode = PREFER
  if ssl_mode == 'verify-full'
    mode =  VERIFY_FULL
  elsif ssl_mode == 'require'
    mode =  REQUIRE
  end

  mode
end
realize_query(query, _params) click to toggle source
# File lib/gooddata/cloud_resources/mysql/mysql_client.rb, line 55
def realize_query(query, _params)
  GoodData.gd_logger.info("Realize SQL query: type=mysql status=started")

  connect
  filename = "#{SecureRandom.urlsafe_base64(6)}_#{Time.now.to_i}.csv"
  measure = Benchmark.measure do
    statement = @connection.create_statement
    statement.set_fetch_size(fetch_size)
    has_result = statement.execute(query)
    if has_result
      result = statement.get_result_set
      metadata = result.get_meta_data
      col_count = metadata.column_count
      CSV.open(filename, 'wb') do |csv|
        csv << Array(1..col_count).map { |i| metadata.get_column_name(i) } # build the header
        csv << Array(1..col_count).map { |i| result.get_string(i)&.to_s } while result.next
      end
    end
  end
  GoodData.gd_logger.info("Realize SQL query: type=mysql status=finished duration=#{measure.real}")
  filename
ensure
  @connection&.close
  @connection = nil
end