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50 lines
1.8 KiB
Python
50 lines
1.8 KiB
Python
from typing import Any, Optional
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import sqlalchemy
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from django.db import connection
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from zerver.lib.db import TimeTrackingConnection
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# This is a Pool that doesn't close connections. Therefore it can be used with
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# existing Django database connections.
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class NonClosingPool(sqlalchemy.pool.NullPool):
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def status(self) -> str:
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return "NonClosingPool"
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def _do_return_conn(self, conn: sqlalchemy.engine.base.Connection) -> None:
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pass
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def recreate(self) -> "NonClosingPool":
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return self.__class__(
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creator=self._creator, # type: ignore[attr-defined] # implementation detail
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recycle=self._recycle, # type: ignore[attr-defined] # implementation detail
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use_threadlocal=self._use_threadlocal, # type: ignore[attr-defined] # implementation detail
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reset_on_return=self._reset_on_return, # type: ignore[attr-defined] # implementation detail
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echo=self.echo,
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logging_name=self._orig_logging_name, # type: ignore[attr-defined] # implementation detail
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_dispatch=self.dispatch, # type: ignore[attr-defined] # implementation detail
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)
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sqlalchemy_engine: Optional[Any] = None
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def get_sqlalchemy_connection() -> sqlalchemy.engine.base.Connection:
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global sqlalchemy_engine
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if sqlalchemy_engine is None:
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def get_dj_conn() -> TimeTrackingConnection:
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connection.ensure_connection()
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return connection.connection
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sqlalchemy_engine = sqlalchemy.create_engine(
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"postgresql://",
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creator=get_dj_conn,
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poolclass=NonClosingPool,
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pool_reset_on_return=False,
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)
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sa_connection = sqlalchemy_engine.connect()
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sa_connection.execution_options(autocommit=False)
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return sa_connection
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