Class: Etl::Integrations::Source::Bigquery::Client

Inherits:
SourceConnector
  • Object
show all
Defined in:
lib/etl/integrations/source/bigquery/client.rb

Instance Method Summary collapse

Instance Method Details

#check_connection(connection_config) ⇒ Object 



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# File 'lib/etl/integrations/source/bigquery/client.rb', line 9

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

#discover(connection_config) ⇒ Object 



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# File 'lib/etl/integrations/source/bigquery/client.rb', line 18

def discover(connection_config)
  connection_config = connection_config.with_indifferent_access
  bigquery = create_connection(connection_config)
  target_dataset_id = connection_config["dataset_id"]
  records = bigquery.datasets.flat_map do |dataset|
    next unless dataset.dataset_id == target_dataset_id

    dataset.tables.flat_map do |table|
      table.schema.fields.map do |field|
        {
          table_name: table.table_id,
          column_name: field.name,
          data_type: field.type,
          is_nullable: field.mode == "NULLABLE"
        }
      end
    end
  end
  catalog = Catalog.new(streams: create_streams(records))
  catalog.to_multiwoven_message
rescue StandardError => e
  handle_exception(
    "BIGQUERY:DISCOVER:EXCEPTION",
    "error",
    e
  )
end

#read(sync_config) ⇒ Object 



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# File 'lib/etl/integrations/source/bigquery/client.rb', line 46

def read(sync_config)
  connection_config = sync_config.source.connection_specification
  connection_config = connection_config.with_indifferent_access
  query = sync_config.model.query

  query = batched_query(query, sync_config.limit, sync_config.offset) unless sync_config.limit.nil? && sync_config.offset.nil?

  bigquery = create_connection(connection_config)

  query(bigquery, query)
rescue StandardError => e
  handle_exception(
    "BIGQUERY:READ:EXCEPTION",
    "error",
    e
  )
end