lib/gooddata/cloud_resources/mssql/mssql_client.rb
# encoding: UTF-8
# frozen_string_literal: true
#
# Copyright (c) 2021 GoodData Corporation. All rights reserved.
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
require 'securerandom'
require 'java'
require 'pathname'
require_relative '../cloud_resource_client'
base = Pathname(__FILE__).dirname.expand_path
Dir.glob(base + 'drivers/*.jar').each do |file|
require file unless file.start_with?('lcm-mssql-driver')
end
module GoodData
module CloudResources
class MSSQLClient < CloudResourceClient
MSSQL_SEPARATOR_PARAM = ";"
MSSQL_URL_PATTERN = %r{jdbc:sqlserver://([^:]+)(:([0-9]+))?(/)?}
MSSQL_DEFAULT_PORT = 1433
LOGIN_TIME_OUT = 30
MSSQL_FETCH_SIZE = 10_000
VERIFY_FULL = 'verify-full'
PREFER = 'prefer'
REQUIRE = 'require'
class << self
def accept?(type)
type == 'mssql'
end
end
def initialize(options = {})
raise("Data Source needs a client to MSSQL to be able to query the storage but 'mssql_client' is empty.") unless options['mssql_client']
connection = options['mssql_client']['connection']
if connection.is_a?(Hash)
@database = connection['database']
@schema = connection['schema']
@authentication = connection['authentication']
@ssl_mode = connection['sslMode']
@url = connection['url']
validate
else
raise('Missing connection info for MSSQL client')
end
Java.com.microsoft.sqlserver.jdbc.SQLServerDriver
end
def realize_query(query, _params)
GoodData.gd_logger.info("Realize SQL query: type=mssql 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(MSSQL_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=mssql status=finished duration=#{measure.real}")
filename
ensure
@connection&.close
@connection = nil
end
def connect
connection_string = build_connection_string
GoodData.logger.info "Setting up connection to MSSQL #{connection_string}"
authentication = @authentication['basic'] || @authentication['activeDirectoryPassword']
prop = java.util.Properties.new
prop.setProperty('userName', authentication['userName'])
prop.setProperty('password', authentication['password'])
@connection = java.sql.DriverManager.getConnection(connection_string, prop)
end
def validate
raise "SSL Mode should be prefer, require and verify-full" unless @ssl_mode == 'prefer' || @ssl_mode == 'require' || @ssl_mode == 'verify-full'
raise "Instance name is not supported" if @url !~ /^[^\\]*$/
raise "The connection url is invalid. Parameter is not supported." if @url.include? MSSQL_SEPARATOR_PARAM
url_matches = @url.scan(MSSQL_URL_PATTERN)
raise "Cannot reach the url" if url_matches.nil? || url_matches.length.zero?
raise "The authentication method is not supported." unless @authentication['basic'] || @authentication['activeDirectoryPassword']
end
def build_connection_string
encrypt = @ssl_mode != PREFER
trust_server_certificate = @ssl_mode == REQUIRE
"#{@url};" \
"database=#{@database};" \
"encrypt=#{encrypt};" \
"trustServerCertificate=#{trust_server_certificate};" \
"loginTimeout=#{LOGIN_TIME_OUT};" \
"#{'authentication=ActiveDirectoryPassword;' if @authentication['activeDirectoryPassword']}"
end
end
end
end