317 lines
9.2 KiB
Python
317 lines
9.2 KiB
Python
from sqlalchemy.engine import url as sa_url
|
|
from sqlalchemy import text
|
|
from sqlalchemy import exc
|
|
from sqlalchemy.util import compat
|
|
from . import config, engines
|
|
import time
|
|
import logging
|
|
import os
|
|
log = logging.getLogger(__name__)
|
|
|
|
FOLLOWER_IDENT = None
|
|
|
|
|
|
class register(object):
|
|
def __init__(self):
|
|
self.fns = {}
|
|
|
|
@classmethod
|
|
def init(cls, fn):
|
|
return register().for_db("*")(fn)
|
|
|
|
def for_db(self, dbname):
|
|
def decorate(fn):
|
|
self.fns[dbname] = fn
|
|
return self
|
|
return decorate
|
|
|
|
def __call__(self, cfg, *arg):
|
|
if isinstance(cfg, compat.string_types):
|
|
url = sa_url.make_url(cfg)
|
|
elif isinstance(cfg, sa_url.URL):
|
|
url = cfg
|
|
else:
|
|
url = cfg.db.url
|
|
backend = url.get_backend_name()
|
|
if backend in self.fns:
|
|
return self.fns[backend](cfg, *arg)
|
|
else:
|
|
return self.fns['*'](cfg, *arg)
|
|
|
|
|
|
def create_follower_db(follower_ident):
|
|
|
|
for cfg in _configs_for_db_operation():
|
|
_create_db(cfg, cfg.db, follower_ident)
|
|
|
|
|
|
def configure_follower(follower_ident):
|
|
for cfg in config.Config.all_configs():
|
|
_configure_follower(cfg, follower_ident)
|
|
|
|
|
|
def setup_config(db_url, options, file_config, follower_ident):
|
|
if follower_ident:
|
|
db_url = _follower_url_from_main(db_url, follower_ident)
|
|
db_opts = {}
|
|
_update_db_opts(db_url, db_opts)
|
|
eng = engines.testing_engine(db_url, db_opts)
|
|
_post_configure_engine(db_url, eng, follower_ident)
|
|
eng.connect().close()
|
|
cfg = config.Config.register(eng, db_opts, options, file_config)
|
|
if follower_ident:
|
|
_configure_follower(cfg, follower_ident)
|
|
return cfg
|
|
|
|
|
|
def drop_follower_db(follower_ident):
|
|
for cfg in _configs_for_db_operation():
|
|
_drop_db(cfg, cfg.db, follower_ident)
|
|
|
|
|
|
def _configs_for_db_operation():
|
|
hosts = set()
|
|
|
|
for cfg in config.Config.all_configs():
|
|
cfg.db.dispose()
|
|
|
|
for cfg in config.Config.all_configs():
|
|
url = cfg.db.url
|
|
backend = url.get_backend_name()
|
|
host_conf = (
|
|
backend,
|
|
url.username, url.host, url.database)
|
|
|
|
if host_conf not in hosts:
|
|
yield cfg
|
|
hosts.add(host_conf)
|
|
|
|
for cfg in config.Config.all_configs():
|
|
cfg.db.dispose()
|
|
|
|
|
|
@register.init
|
|
def _create_db(cfg, eng, ident):
|
|
raise NotImplementedError("no DB creation routine for cfg: %s" % eng.url)
|
|
|
|
|
|
@register.init
|
|
def _drop_db(cfg, eng, ident):
|
|
raise NotImplementedError("no DB drop routine for cfg: %s" % eng.url)
|
|
|
|
|
|
@register.init
|
|
def _update_db_opts(db_url, db_opts):
|
|
pass
|
|
|
|
|
|
@register.init
|
|
def _configure_follower(cfg, ident):
|
|
pass
|
|
|
|
|
|
@register.init
|
|
def _post_configure_engine(url, engine, follower_ident):
|
|
pass
|
|
|
|
|
|
@register.init
|
|
def _follower_url_from_main(url, ident):
|
|
url = sa_url.make_url(url)
|
|
url.database = ident
|
|
return url
|
|
|
|
|
|
@_update_db_opts.for_db("mssql")
|
|
def _mssql_update_db_opts(db_url, db_opts):
|
|
db_opts['legacy_schema_aliasing'] = False
|
|
|
|
|
|
@_follower_url_from_main.for_db("sqlite")
|
|
def _sqlite_follower_url_from_main(url, ident):
|
|
url = sa_url.make_url(url)
|
|
if not url.database or url.database == ':memory:':
|
|
return url
|
|
else:
|
|
return sa_url.make_url("sqlite:///%s.db" % ident)
|
|
|
|
|
|
@_post_configure_engine.for_db("sqlite")
|
|
def _sqlite_post_configure_engine(url, engine, follower_ident):
|
|
from sqlalchemy import event
|
|
|
|
@event.listens_for(engine, "connect")
|
|
def connect(dbapi_connection, connection_record):
|
|
# use file DBs in all cases, memory acts kind of strangely
|
|
# as an attached
|
|
if not follower_ident:
|
|
dbapi_connection.execute(
|
|
'ATTACH DATABASE "test_schema.db" AS test_schema')
|
|
else:
|
|
dbapi_connection.execute(
|
|
'ATTACH DATABASE "%s_test_schema.db" AS test_schema'
|
|
% follower_ident)
|
|
|
|
|
|
@_create_db.for_db("postgresql")
|
|
def _pg_create_db(cfg, eng, ident):
|
|
with eng.connect().execution_options(
|
|
isolation_level="AUTOCOMMIT") as conn:
|
|
try:
|
|
_pg_drop_db(cfg, conn, ident)
|
|
except Exception:
|
|
pass
|
|
currentdb = conn.scalar("select current_database()")
|
|
for attempt in range(3):
|
|
try:
|
|
conn.execute(
|
|
"CREATE DATABASE %s TEMPLATE %s" % (ident, currentdb))
|
|
except exc.OperationalError as err:
|
|
if attempt != 2 and "accessed by other users" in str(err):
|
|
time.sleep(.2)
|
|
continue
|
|
else:
|
|
raise
|
|
else:
|
|
break
|
|
|
|
|
|
@_create_db.for_db("mysql")
|
|
def _mysql_create_db(cfg, eng, ident):
|
|
with eng.connect() as conn:
|
|
try:
|
|
_mysql_drop_db(cfg, conn, ident)
|
|
except Exception:
|
|
pass
|
|
conn.execute("CREATE DATABASE %s" % ident)
|
|
conn.execute("CREATE DATABASE %s_test_schema" % ident)
|
|
conn.execute("CREATE DATABASE %s_test_schema_2" % ident)
|
|
|
|
|
|
@_configure_follower.for_db("mysql")
|
|
def _mysql_configure_follower(config, ident):
|
|
config.test_schema = "%s_test_schema" % ident
|
|
config.test_schema_2 = "%s_test_schema_2" % ident
|
|
|
|
|
|
@_create_db.for_db("sqlite")
|
|
def _sqlite_create_db(cfg, eng, ident):
|
|
pass
|
|
|
|
|
|
@_drop_db.for_db("postgresql")
|
|
def _pg_drop_db(cfg, eng, ident):
|
|
with eng.connect().execution_options(
|
|
isolation_level="AUTOCOMMIT") as conn:
|
|
conn.execute(
|
|
text(
|
|
"select pg_terminate_backend(pid) from pg_stat_activity "
|
|
"where usename=current_user and pid != pg_backend_pid() "
|
|
"and datname=:dname"
|
|
), dname=ident)
|
|
conn.execute("DROP DATABASE %s" % ident)
|
|
|
|
|
|
@_drop_db.for_db("sqlite")
|
|
def _sqlite_drop_db(cfg, eng, ident):
|
|
if ident:
|
|
os.remove("%s_test_schema.db" % ident)
|
|
else:
|
|
os.remove("%s.db" % ident)
|
|
|
|
|
|
@_drop_db.for_db("mysql")
|
|
def _mysql_drop_db(cfg, eng, ident):
|
|
with eng.connect() as conn:
|
|
try:
|
|
conn.execute("DROP DATABASE %s_test_schema" % ident)
|
|
except Exception:
|
|
pass
|
|
try:
|
|
conn.execute("DROP DATABASE %s_test_schema_2" % ident)
|
|
except Exception:
|
|
pass
|
|
try:
|
|
conn.execute("DROP DATABASE %s" % ident)
|
|
except Exception:
|
|
pass
|
|
|
|
|
|
@_create_db.for_db("oracle")
|
|
def _oracle_create_db(cfg, eng, ident):
|
|
# NOTE: make sure you've run "ALTER DATABASE default tablespace users" or
|
|
# similar, so that the default tablespace is not "system"; reflection will
|
|
# fail otherwise
|
|
with eng.connect() as conn:
|
|
conn.execute("create user %s identified by xe" % ident)
|
|
conn.execute("create user %s_ts1 identified by xe" % ident)
|
|
conn.execute("create user %s_ts2 identified by xe" % ident)
|
|
conn.execute("grant dba to %s" % (ident, ))
|
|
conn.execute("grant unlimited tablespace to %s" % ident)
|
|
conn.execute("grant unlimited tablespace to %s_ts1" % ident)
|
|
conn.execute("grant unlimited tablespace to %s_ts2" % ident)
|
|
|
|
@_configure_follower.for_db("oracle")
|
|
def _oracle_configure_follower(config, ident):
|
|
config.test_schema = "%s_ts1" % ident
|
|
config.test_schema_2 = "%s_ts2" % ident
|
|
|
|
|
|
def _ora_drop_ignore(conn, dbname):
|
|
try:
|
|
conn.execute("drop user %s cascade" % dbname)
|
|
log.info("Reaped db: %s" % dbname)
|
|
return True
|
|
except exc.DatabaseError as err:
|
|
log.warn("couldn't drop db: %s" % err)
|
|
return False
|
|
|
|
|
|
@_drop_db.for_db("oracle")
|
|
def _oracle_drop_db(cfg, eng, ident):
|
|
with eng.connect() as conn:
|
|
# cx_Oracle seems to occasionally leak open connections when a large
|
|
# suite it run, even if we confirm we have zero references to
|
|
# connection objects.
|
|
# while there is a "kill session" command in Oracle,
|
|
# it unfortunately does not release the connection sufficiently.
|
|
_ora_drop_ignore(conn, ident)
|
|
_ora_drop_ignore(conn, "%s_ts1" % ident)
|
|
_ora_drop_ignore(conn, "%s_ts2" % ident)
|
|
|
|
|
|
def reap_oracle_dbs(eng):
|
|
log.info("Reaping Oracle dbs...")
|
|
with eng.connect() as conn:
|
|
to_reap = conn.execute(
|
|
"select u.username from all_users u where username "
|
|
"like 'TEST_%' and not exists (select username "
|
|
"from v$session where username=u.username)")
|
|
all_names = set([username.lower() for (username, ) in to_reap])
|
|
to_drop = set()
|
|
for name in all_names:
|
|
if name.endswith("_ts1") or name.endswith("_ts2"):
|
|
continue
|
|
else:
|
|
to_drop.add(name)
|
|
if "%s_ts1" % name in all_names:
|
|
to_drop.add("%s_ts1" % name)
|
|
if "%s_ts2" % name in all_names:
|
|
to_drop.add("%s_ts2" % name)
|
|
|
|
dropped = total = 0
|
|
for total, username in enumerate(to_drop, 1):
|
|
if _ora_drop_ignore(conn, username):
|
|
dropped += 1
|
|
log.info(
|
|
"Dropped %d out of %d stale databases detected", dropped, total)
|
|
|
|
|
|
@_follower_url_from_main.for_db("oracle")
|
|
def _oracle_follower_url_from_main(url, ident):
|
|
url = sa_url.make_url(url)
|
|
url.username = ident
|
|
url.password = 'xe'
|
|
return url
|
|
|
|
|