def test_create_table_runtime_error(mock_service_account):
bq = BigQueryAdapter(mock_service_account)
schema = [
bigquery.SchemaField("column1", "STRING", mode="REQUIRED"),
bigquery.SchemaField("column2", "INTEGER", mode="REQUIRED"),
]
with pytest.raises(RuntimeError):
bq.create_table(schema)
def create_config_table(self, big_query_client: BigQueryAdapter):
big_query_client.set_data_set_ref('mysql_sync')
big_query_client.set_table_ref('data_sources')
# return true if table already exists
if big_query_client.check_table():
return True
schema = [
bigquery.SchemaField('service',
'STRING',
description="Service Name"),
bigquery.SchemaField('data_set',
'STRING',
description="Big Query Data Set"),
bigquery.SchemaField('host',
'STRING',
description="MySQL host connection"),
bigquery.SchemaField('user',
'STRING',
description="MySQL connection user"),
bigquery.SchemaField('password',
'STRING',
description="MySQL connection password"),
bigquery.SchemaField('database',
'STRING',
description="MySQL Database"),
bigquery.SchemaField('last_run',
'TIMESTAMP',
description="Last produce date"),
]
result = big_query_client.create_table(schema)
if result:
self.sd_logger.info({'message': f"Created Config table"}, {
'class': 'PrefectInstallBigQuery',
'method': 'create_config_table'
})
else:
self.sd_logger.warning(big_query_client.errors, {
'class': 'PrefectInstallBigQuery',
'method': 'create_config_table'
})
return result
def create_tracking_table(self, big_query_client: BigQueryAdapter):
big_query_client.set_data_set_ref(self.definitions['data_set'])
big_query_client.set_table_ref('sync_tracking_table')
# return true if table already exists
if big_query_client.check_table():
return True
schema = [
bigquery.SchemaField(
'table',
'STRING',
description="Tracked Table Name"
),
bigquery.SchemaField(
'watched',
'STRING',
description="Column to watch to minimize the number of records loaded per sync"
),
bigquery.SchemaField(
'primary_id',
'STRING',
description="Primary Id Column(s)"
),
bigquery.SchemaField(
'synchronize',
'BOOLEAN',
description="Flag to Synchronize the table"
)
]
result = big_query_client.create_table(schema)
if result:
self.sd_logger.info(
{'message': f"Created tracking table"},
{'class': 'PrefectAddServiceBigQuery', 'method': 'create_tracking_table'}
)
else:
self.sd_logger.warning(
big_query_client.errors,
{'class': 'PrefectAddServiceBigQuery', 'method': 'create_tracking_table'}
)
return result
class Schema(Task):
def __init__(self, service: str, **kwargs):
self.service_account = service_account.Credentials.from_service_account_file(
os.environ['MYSQL_BIG_QUERY_GOOGLE_AUTH'])
self.definitions = service_helpers.get_definitions(service)
self.sd_logger = StackDriverAdapter(self.service_account)
self.sd_logger.get_client()
self.sd_logger.create_logger(f"{self.definitions['service']}-etl")
self.pub_sub_client = PubSubAdapter(self.service_account)
self.pub_sub_client.get_subscriber()
self.pub_sub_client.set_subscription(
f"{self.definitions['service']}-etl-schema")
self.big_query_client = BigQueryAdapter(self.service_account)
self.big_query_client.get_client()
self.big_query_client.set_data_set_ref(self.definitions['data_set'])
super().__init__(**kwargs)
def get_mysql_schema(self, table: str) -> Union[list, bool]:
mysql_client = MySqlAdapter(self.definitions['service'])
columns = mysql_client.mysql_table_definition(table)
if not columns:
self.sd_logger.error(mysql_client.errors, {
'class': 'Schema',
'method': 'get_mysql_schema',
'table': table
})
return False
return columns
@staticmethod
def organized_mysql_schema(schema: list) -> list:
organized_column_data = []
for column in schema:
organized_column_data.append(
service_helpers.label_mysql_table_definitions(column))
return organized_column_data
@staticmethod
def convert_mysql_to_big_query_schema(schema: list) -> list:
return service_helpers.generate_bq_schema_from_mysql(schema)
def store_mysql_schema(self, schema: list, table: str) -> bool:
encoded_schema = json.dumps(schema)
storage_client = StorageAdapter(self.service_account)
storage_client.get_client()
date_time_obj = datetime.utcnow()
result = storage_client.write_string(
bucket=self.definitions['service'] + '-etl',
destination=
f'schema/{table}/{date_time_obj.strftime("%m-%d-%Y_%H:%M:%S")}_UTC',
string=encoded_schema)
if not result:
self.sd_logger.error(storage_client.errors, {
'class': 'Schema',
'method': 'store_mysql_schema',
'table': table
})
return False
return result
def check_table_exists(self, table):
self.big_query_client.set_table_ref(table)
return self.big_query_client.check_table()
def get_current_schema(self, table: str):
self.big_query_client.set_table_ref(table)
return self.big_query_client.get_schema()
@staticmethod
def compare_schema(new_schema, current_schema) -> bool:
# first check is total number of items
if len(new_schema) is not len(current_schema):
return False
# compare column names and types
schema_matches = True
for x in range(len(new_schema)):
exists_in_current = False
if current_schema[x].name == new_schema[x].name:
if current_schema[x].field_type == new_schema[x].field_type:
exists_in_current = True
else:
exists_in_current = True
if not exists_in_current:
schema_matches = False
return schema_matches
def create_table(self, table: str, schema: list) -> bool:
self.big_query_client.set_table_ref(table)
result = self.big_query_client.create_table(schema=schema,
overwrite=True)
if result:
self.sd_logger.info({'message': f"Table {table} Created"}, {
'class': 'Schema',
'method': 'create_table',
'table': table
})
else:
self.sd_logger.error(self.big_query_client.errors, {
'class': 'Schema',
'method': 'create_table',
'table': table
})
return result
@staticmethod
def acknowledge_message(message):
message.ack()
def copy_bq_table(self, table: str):
self.big_query_client.set_table_ref(table)
copy_table_ref = self.big_query_client.table_ref
date_time_obj = datetime.utcnow()
destination_str = f'{table}_{date_time_obj.strftime("%m_%d_%Y")}'
self.big_query_client.set_table_ref(destination_str)
destination_table_ref = self.big_query_client.table_ref
result = self.big_query_client.copy_table(
copy_table=copy_table_ref, destination_table=destination_table_ref)
if result:
self.sd_logger.warning(
{'message': f"Table {table} copied to {destination_str}"}, {
'class': 'Schema',
'method': 'copy_bq_table',
'table': table
})
else:
self.sd_logger.error(self.big_query_client.errors, {
'class': 'Schema',
'method': 'copy_bq_table',
'table': table
})
return destination_str
def backup_table_to_storage(self, table):
self.big_query_client.set_table_ref(table)
copy_table_ref = self.big_query_client.table_ref
date_time_obj = datetime.utcnow()
destination = f'gs://{self.definitions["service"]}-etl/data/{table}/{date_time_obj.strftime("%m-%d-%Y_%H:%M:%S")}_UTC_*.avro'
result = self.big_query_client.export_table_to_storage(
table=copy_table_ref, destination=destination)
if result:
self.sd_logger.info(
{'message': f"Table {table} exported to {destination}"}, {
'class': 'Schema',
'method': 'backup_table_to_storage'
})
else:
self.sd_logger.error(self.big_query_client.errors, {
'class': 'Schema',
'method': 'backup_table_to_storage'
})
return result
def delete_table(self, table):
self.big_query_client.set_table_ref(table)
result = self.big_query_client.delete_table()
if result:
self.sd_logger.info({'message': f"Table {table} deleted"}, {
'class': 'Schema',
'method': 'delete_table'
})
else:
self.sd_logger.error(self.big_query_client.errors, {
'class': 'Schema',
'method': 'delete_table'
})
return result