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authorMark Haines <mark.haines@matrix.org>2015-04-29 13:15:14 +0100
committerMark Haines <mark.haines@matrix.org>2015-04-29 13:15:14 +0100
commit4ad8b451559682645c818f6c1180e5f9d42a7eeb (patch)
tree94fe0beaaaa4ed8c1bb9451f1274df819d9ce8d7 /synapse/storage/engines/postgres.py
parentUpdate the query format used by keyring to match current key v2 spec (diff)
parentMention that postgres databases must have the correct charset encoding (diff)
downloadsynapse-4ad8b451559682645c818f6c1180e5f9d42a7eeb.tar.xz
Merge branch 'develop' into key_distribution
Conflicts:
	synapse/config/homeserver.py
Diffstat (limited to 'synapse/storage/engines/postgres.py')
-rw-r--r--synapse/storage/engines/postgres.py47
1 files changed, 47 insertions, 0 deletions
diff --git a/synapse/storage/engines/postgres.py b/synapse/storage/engines/postgres.py
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+# -*- coding: utf-8 -*-
+# Copyright 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from synapse.storage import prepare_database
+
+
+class PostgresEngine(object):
+    def __init__(self, database_module):
+        self.module = database_module
+        self.module.extensions.register_type(self.module.extensions.UNICODE)
+
+    def convert_param_style(self, sql):
+        return sql.replace("?", "%s")
+
+    def encode_parameter(self, param):
+        return param
+
+    def on_new_connection(self, db_conn):
+        db_conn.set_isolation_level(
+            self.module.extensions.ISOLATION_LEVEL_REPEATABLE_READ
+        )
+
+    def prepare_database(self, db_conn):
+        prepare_database(db_conn, self)
+
+    def is_deadlock(self, error):
+        if isinstance(error, self.module.DatabaseError):
+            return error.pgcode in ["40001", "40P01"]
+        return False
+
+    def is_connection_closed(self, conn):
+        return bool(conn)
+
+    def lock_table(self, txn, table):
+        txn.execute("LOCK TABLE %s in EXCLUSIVE MODE" % (table,))