def _assert_ready(self):
self._assert_open()
if not self.ready:
# TODO: add transaction identifier
raise BoltTransactionError(
"A transaction is already in progress on "
"this connection", self.remote_address)
async def rollback(self):
self._assert_open()
if self._autocommit:
raise BoltTransactionError(
"Cannot explicitly rollback an auto-commit "
"transaction", self._courier.remote_address)
try:
self._courier.write_rollback()
await self._courier.send()
await self._courier.fetch()
finally:
self._closed = True
async def commit(self):
self._assert_open()
if self._autocommit:
raise BoltTransactionError(
"Cannot explicitly commit an auto-commit "
"transaction", self._courier.remote_address)
try:
commit = self._courier.write_commit()
await self._courier.send()
await self._courier.fetch()
summary = await commit.get_summary()
return Bookmark(summary.metadata.get("bookmark"))
finally:
self._closed = True
def _assert_open(self):
if self.closed:
raise BoltTransactionError("Transaction is already "
"closed", self._courier.remote_address)