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@@ -13,39 +13,47 @@
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# limitations under the License.
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import logging
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-from typing import Mapping, Optional
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+from typing import TYPE_CHECKING, Any, Mapping, NoReturn, Optional, Tuple, cast
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from synapse.storage.engines._base import (
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BaseDatabaseEngine,
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IncorrectDatabaseSetup,
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IsolationLevel,
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)
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-from synapse.storage.types import Connection
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+from synapse.storage.types import Cursor
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+
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+if TYPE_CHECKING:
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+ import psycopg2 # noqa: F401
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+
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+ from synapse.storage.database import LoggingDatabaseConnection
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+
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logger = logging.getLogger(__name__)
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-class PostgresEngine(BaseDatabaseEngine):
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- def __init__(self, database_module, database_config):
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- super().__init__(database_module, database_config)
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- self.module.extensions.register_type(self.module.extensions.UNICODE)
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+class PostgresEngine(BaseDatabaseEngine["psycopg2.connection"]):
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+ def __init__(self, database_config: Mapping[str, Any]):
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+ import psycopg2.extensions
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+
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+ super().__init__(psycopg2, database_config)
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+ psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
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# Disables passing `bytes` to txn.execute, c.f. #6186. If you do
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# actually want to use bytes than wrap it in `bytearray`.
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- def _disable_bytes_adapter(_):
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+ def _disable_bytes_adapter(_: bytes) -> NoReturn:
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raise Exception("Passing bytes to DB is disabled.")
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- self.module.extensions.register_adapter(bytes, _disable_bytes_adapter)
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- self.synchronous_commit = database_config.get("synchronous_commit", True)
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- self._version = None # unknown as yet
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+ psycopg2.extensions.register_adapter(bytes, _disable_bytes_adapter)
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+ self.synchronous_commit: bool = database_config.get("synchronous_commit", True)
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+ self._version: Optional[int] = None # unknown as yet
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self.isolation_level_map: Mapping[int, int] = {
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- IsolationLevel.READ_COMMITTED: self.module.extensions.ISOLATION_LEVEL_READ_COMMITTED,
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- IsolationLevel.REPEATABLE_READ: self.module.extensions.ISOLATION_LEVEL_REPEATABLE_READ,
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- IsolationLevel.SERIALIZABLE: self.module.extensions.ISOLATION_LEVEL_SERIALIZABLE,
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+ IsolationLevel.READ_COMMITTED: psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED,
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+ IsolationLevel.REPEATABLE_READ: psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ,
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+ IsolationLevel.SERIALIZABLE: psycopg2.extensions.ISOLATION_LEVEL_SERIALIZABLE,
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}
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self.default_isolation_level = (
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- self.module.extensions.ISOLATION_LEVEL_REPEATABLE_READ
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+ psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ
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)
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self.config = database_config
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@@ -53,19 +61,21 @@ class PostgresEngine(BaseDatabaseEngine):
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def single_threaded(self) -> bool:
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return False
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- def get_db_locale(self, txn):
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+ def get_db_locale(self, txn: Cursor) -> Tuple[str, str]:
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txn.execute(
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"SELECT datcollate, datctype FROM pg_database WHERE datname = current_database()"
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)
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- collation, ctype = txn.fetchone()
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+ collation, ctype = cast(Tuple[str, str], txn.fetchone())
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return collation, ctype
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- def check_database(self, db_conn, allow_outdated_version: bool = False):
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+ def check_database(
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+ self, db_conn: "psycopg2.connection", allow_outdated_version: bool = False
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+ ) -> None:
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# Get the version of PostgreSQL that we're using. As per the psycopg2
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# docs: The number is formed by converting the major, minor, and
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# revision numbers into two-decimal-digit numbers and appending them
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# together. For example, version 8.1.5 will be returned as 80105
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- self._version = db_conn.server_version
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+ self._version = cast(int, db_conn.server_version)
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allow_unsafe_locale = self.config.get("allow_unsafe_locale", False)
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# Are we on a supported PostgreSQL version?
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@@ -108,7 +118,7 @@ class PostgresEngine(BaseDatabaseEngine):
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ctype,
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)
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- def check_new_database(self, txn):
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+ def check_new_database(self, txn: Cursor) -> None:
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"""Gets called when setting up a brand new database. This allows us to
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apply stricter checks on new databases versus existing database.
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"""
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@@ -129,10 +139,10 @@ class PostgresEngine(BaseDatabaseEngine):
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"See docs/postgres.md for more information." % ("\n".join(errors))
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)
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- def convert_param_style(self, sql):
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+ def convert_param_style(self, sql: str) -> str:
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return sql.replace("?", "%s")
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- def on_new_connection(self, db_conn):
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+ def on_new_connection(self, db_conn: "LoggingDatabaseConnection") -> None:
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db_conn.set_isolation_level(self.default_isolation_level)
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# Set the bytea output to escape, vs the default of hex
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@@ -149,14 +159,14 @@ class PostgresEngine(BaseDatabaseEngine):
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db_conn.commit()
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@property
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- def can_native_upsert(self):
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+ def can_native_upsert(self) -> bool:
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"""
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Can we use native UPSERTs?
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"""
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return True
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@property
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- def supports_using_any_list(self):
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+ def supports_using_any_list(self) -> bool:
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"""Do we support using `a = ANY(?)` and passing a list"""
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return True
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@@ -165,27 +175,25 @@ class PostgresEngine(BaseDatabaseEngine):
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"""Do we support the `RETURNING` clause in insert/update/delete?"""
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return True
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- def is_deadlock(self, error):
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- if isinstance(error, self.module.DatabaseError):
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+ def is_deadlock(self, error: Exception) -> bool:
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+ import psycopg2.extensions
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+
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+ if isinstance(error, psycopg2.DatabaseError):
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# https://www.postgresql.org/docs/current/static/errcodes-appendix.html
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# "40001" serialization_failure
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# "40P01" deadlock_detected
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return error.pgcode in ["40001", "40P01"]
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return False
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- def is_connection_closed(self, conn):
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+ def is_connection_closed(self, conn: "psycopg2.connection") -> bool:
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return bool(conn.closed)
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- def lock_table(self, txn, table):
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+ def lock_table(self, txn: Cursor, table: str) -> None:
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txn.execute("LOCK TABLE %s in EXCLUSIVE MODE" % (table,))
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@property
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- def server_version(self):
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- """Returns a string giving the server version. For example: '8.1.5'
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-
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- Returns:
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- string
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- """
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+ def server_version(self) -> str:
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+ """Returns a string giving the server version. For example: '8.1.5'."""
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# note that this is a bit of a hack because it relies on check_database
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# having been called. Still, that should be a safe bet here.
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numver = self._version
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@@ -197,17 +205,21 @@ class PostgresEngine(BaseDatabaseEngine):
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else:
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return "%i.%i.%i" % (numver / 10000, (numver % 10000) / 100, numver % 100)
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- def in_transaction(self, conn: Connection) -> bool:
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- return conn.status != self.module.extensions.STATUS_READY # type: ignore
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+ def in_transaction(self, conn: "psycopg2.connection") -> bool:
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+ import psycopg2.extensions
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+
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+ return conn.status != psycopg2.extensions.STATUS_READY
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- def attempt_to_set_autocommit(self, conn: Connection, autocommit: bool):
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- return conn.set_session(autocommit=autocommit) # type: ignore
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+ def attempt_to_set_autocommit(
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+ self, conn: "psycopg2.connection", autocommit: bool
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+ ) -> None:
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+ return conn.set_session(autocommit=autocommit)
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def attempt_to_set_isolation_level(
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- self, conn: Connection, isolation_level: Optional[int]
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- ):
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+ self, conn: "psycopg2.connection", isolation_level: Optional[int]
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+ ) -> None:
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if isolation_level is None:
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isolation_level = self.default_isolation_level
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else:
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isolation_level = self.isolation_level_map[isolation_level]
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- return conn.set_isolation_level(isolation_level) # type: ignore
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+ return conn.set_isolation_level(isolation_level)
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