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Support custom requests session in presto connections #106

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Merged
matthewwardrop merged 5 commits into from
Oct 9, 2020
Merged

Support custom requests session in presto connections #106

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6e05aaf
add connection options to presto
gthomas-slack Oct 6, 2020
ae3fc92
requests_session
gthomas-slack Oct 6, 2020
7325f08
format
gthomas-slack Oct 8, 2020
00d6e89
doc
gthomas-slack Oct 8, 2020
0338d25
address comments
gthomas-slack Oct 8, 2020
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9 changes: 7 additions & 2 deletions omniduct/databases/presto.py
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Original file line number Diff line number Diff line change
Expand Up @@ -49,21 +49,25 @@ def NAMESPACE_DEFAULT(self):
}

@override
def _init(self, catalog='default', schema='default', server_protocol='http', source=None):
def _init(self, catalog='default', schema='default', server_protocol='http', source=None, requests_session=None):
"""
catalog (str): The default catalog to use in database queries.
schema (str): The default schema/database to use in database queries.
server_protocol (str): The protocol over which to connect to the Presto REST
service ('http' or 'https'). (default='http')
source (str): The source of this query (by default "omniduct <version>").
If manually specified, result will be: "<source> / omniduct <version>".
requests_session (requests.Session): an optional requests.Session object for advanced usage.
Passed through to the pyhive Cursor which supports custom requests sessions for advanced usage
such as custom headers, cookie values, retry logic, etc.
"""
self.catalog = catalog
self.schema = schema
self.server_protocol = server_protocol
self.source = source
self.__presto = None
self.connection_fields += ('catalog', 'schema')
self._requests_session = requests_session

@property
def source(self):
Expand Down Expand Up @@ -115,7 +119,8 @@ def _execute(self, statement, cursor, wait, session_properties):
cursor = cursor or presto.Cursor(
host=self.host, port=self.port, username=self.username, password=self.password,
catalog=self.catalog, schema=self.schema, session_props=session_properties,
poll_interval=1, source=self.source, protocol=self.server_protocol
poll_interval=1, source=self.source, protocol=self.server_protocol,
requests_session=self._requests_session
)
cursor.execute(statement)
status = cursor.poll()
Expand Down