Class: GoodData::CloudResources::MysqlClient

Inherits:
CloudResourceClient show all
Defined in:
lib/gooddata/cloud_resources/mysql/mysql_client.rb

Constant Summary collapse

JDBC_MYSQL_PATTERN = 
%r{jdbc:mysql:\/\/([^:^\/]+)(:([0-9]+))?(\/)?}
MYSQL_DEFAULT_PORT = 
3306
JDBC_MYSQL_PROTOCOL = 
'jdbc:mysql://'
VERIFY_FULL = 
'VERIFY_IDENTITY'
PREFER = 
'PREFERRED'
REQUIRE = 
'REQUIRED'
MYSQL_FETCH_SIZE = 
1000

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from CloudResourceClient

descendants

Constructor Details

#initialize(options = {}) ⇒ MysqlClient

Returns a new instance of MysqlClient.



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/gooddata/cloud_resources/mysql/mysql_client.rb', line 35

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']
    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.cj.jdbc.Driver
end

Class Method Details

.accept?(type) ⇒ Boolean

Returns:

  • (Boolean) 


30
31
32
 
# File 'lib/gooddata/cloud_resources/mysql/mysql_client.rb', line 30

def accept?(type)
  type == 'mysql'
end

Instance Method Details

#build_url(url) ⇒ Object 



89
90
91
92
93
94
95
96
97
 
# File 'lib/gooddata/cloud_resources/mysql/mysql_client.rb', line 89

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}?sslmode=#{get_ssl_mode(@ssl_mode)}&useCursorFetch=true&enabledTLSProtocols=TLSv1.2"
end

#connect ⇒ Object 



78
79
80
81
82
83
84
85
86
87
 
# File 'lib/gooddata/cloud_resources/mysql/mysql_client.rb', line 78

def connect
  GoodData.logger.info "Setting up connection to Mysql #{@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

#get_ssl_mode(ssl_mode) ⇒ Object 



99
100
101
102
103
104
105
106
107
108
 
# File 'lib/gooddata/cloud_resources/mysql/mysql_client.rb', line 99

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) ⇒ Object 



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
# File 'lib/gooddata/cloud_resources/mysql/mysql_client.rb', line 52

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(MYSQL_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