Class: Multiwoven::Integrations::Destination::Postgresql::Client

Inherits:
DestinationConnector
  • Object
show all
Defined in:
lib/multiwoven/integrations/destination/postgresql/client.rb

Constant Summary collapse

MAX_CHUNK_SIZE = 
10_000

Instance Method Summary collapse

Instance Method Details

#check_connection(connection_config) ⇒ Object 



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# File 'lib/multiwoven/integrations/destination/postgresql/client.rb', line 11

def check_connection(connection_config)
  connection_config = connection_config.with_indifferent_access
  create_connection(connection_config)
  ConnectionStatus.new(
    status: ConnectionStatusType["succeeded"]
  ).to_multiwoven_message
rescue PG::Error => e
  ConnectionStatus.new(
    status: ConnectionStatusType["failed"], message: e.message
  ).to_multiwoven_message
end

#discover(connection_config) ⇒ Object 



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# File 'lib/multiwoven/integrations/destination/postgresql/client.rb', line 23

def discover(connection_config)
  connection_config = connection_config.with_indifferent_access
  query = "SELECT table_name, column_name,
           CASE WHEN data_type = 'USER-DEFINED' THEN udt_name ELSE data_type END
           AS data_type,
           is_nullable
           FROM information_schema.columns
           WHERE table_schema = '#{connection_config[:schema]}' AND table_catalog = '#{connection_config[:database]}'
           ORDER BY table_name, ordinal_position;"

  db = create_connection(connection_config)
  records = db.exec(query) do |result|
    result.map do |row|
      row
    end
  end
  catalog = Catalog.new(streams: create_streams(records))
  catalog.to_multiwoven_message
rescue StandardError => e
  handle_exception(e, {
                     context: "POSTGRESQL:DISCOVER:EXCEPTION",
                     type: "error"
                   })
ensure
  db&.close
end

#write(sync_config, records, action = "destination_insert") ⇒ Object 



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# File 'lib/multiwoven/integrations/destination/postgresql/client.rb', line 50

def write(sync_config, records, action = "destination_insert")
  connection_config = sync_config.destination.connection_specification.with_indifferent_access
  raw_table = sync_config.stream.name
  table_name = qualify_table(connection_config[:schema], raw_table)
  db = create_connection(connection_config)
  primary_key = fetch_primary_key(db, connection_config[:schema], raw_table)

  write_success = 0
  write_failure = 0
  log_message_array = []

  records.each_slice(MAX_CHUNK_SIZE) do |chunk|
    bulk_write(db, table_name, chunk, primary_key, action)
    write_success += chunk.size
    log_message_array << log_request_response("info", "bulk_#{action}", "#{chunk.size} rows")
  rescue StandardError => e
    logger.warn("POSTGRESQL:BULK_WRITE:FALLBACK chunk_size=#{chunk.size} error=#{e.message}")
    chunk.each do |record|
      response = bulk_write(db, table_name, [record], primary_key, action)
      write_success += 1
      log_message_array << log_request_response("info", "fallback_#{action}", response)
    rescue StandardError => individual_error
      handle_exception(individual_error, {
                         context: "POSTGRESQL:RECORD:WRITE:EXCEPTION",
                         type: "error",
                         sync_id: sync_config.sync_id,
                         sync_run_id: sync_config.sync_run_id
                       })
      write_failure += 1
      log_message_array << log_request_response("error", "fallback_#{action}", individual_error.message)
    end
  end

  tracking_message(write_success, write_failure, log_message_array)
rescue StandardError => e
  handle_exception(e, {
                     context: "POSTGRESQL:RECORD:WRITE:EXCEPTION",
                     type: "error",
                     sync_id: sync_config.sync_id,
                     sync_run_id: sync_config.sync_run_id
                   })
ensure
  db&.close
end