from sqlalchemy import create_engine
from sqlalchemy import MetaData, Table, Column, Text
from sqlalchemy.pool import QueuePool, SingletonThreadPool
-from sqlalchemy.schema import PrimaryKeyConstraint, Index
+from sqlalchemy.schema import (PrimaryKeyConstraint, Index, AddConstraint,
+ CreateIndex)
from sqlalchemy.sql import select, and_
import ConfigParser
import os
import uuid
import logging
+import time
CURRENT_SCHEMA_VERSION = 2
pass
-class SqlStore(Log):
+class BaseStore(Log):
+ # Some helper functions used for upgrades
+ def add_constraint(self, table):
+ raise NotImplementedError()
+
+ def add_index(self, index):
+ raise NotImplementedError()
+
+
+class SqlStore(BaseStore):
__instances = {}
@classmethod
# It's not possible to share connections for SQLite between
# threads, so let's use the SingletonThreadPool for them
pool_args = {'poolclass': SingletonThreadPool}
- self._dbengine = create_engine(engine_name, **pool_args)
+ self._dbengine = create_engine(engine_name,
+ echo=cherrypy.config.get('db.echo',
+ False),
+ **pool_args)
self.is_readonly = False
+ def add_constraint(self, constraint):
+ if self._dbengine.dialect.name != 'sqlite':
+ # It is impossible to add constraints to a pre-existing table for
+ # SQLite
+ # source: http://www.sqlite.org/omitted.html
+ create_constraint = AddConstraint(constraint, bind=self._dbengine)
+ create_constraint.execute()
+
+ def add_index(self, index):
+ add_index = CreateIndex(index, bind=self._dbengine)
+ add_index.execute()
+
def debug(self, fact):
if self.db_conn_log:
super(SqlStore, self).debug(fact)
self._con.execute(self._table.delete(self._where(kvfilter)))
-class FileStore(Log):
+class FileStore(BaseStore):
def __init__(self, name):
self._filename = name
self._config.read(self._filename)
return self._config
+ def add_constraint(self, table):
+ raise NotImplementedError()
+
+ def add_index(self, index):
+ raise NotImplementedError()
+
class FileQuery(Log):
class Store(Log):
+ # Static, Store-level variables
_is_upgrade = False
+ __cleanups = {}
+
+ # Static, class-level variables
+ # Either set this to False, or implement _cleanup, in child classes
+ _should_cleanup = True
def __init__(self, config_name=None, database_url=None):
if config_name is None and database_url is None:
if not self._is_upgrade:
self._check_database()
+ if self._should_cleanup:
+ self._schedule_cleanup()
+
+ def _schedule_cleanup(self):
+ store_name = self.__class__.__name__
+ if self.is_readonly:
+ # No use in cleanups on a readonly database
+ self.debug('Not scheduling cleanup for %s due to readonly' %
+ store_name)
+ return
+ if store_name in Store.__cleanups:
+ # This class was already scheduled, skip
+ return
+ self.debug('Scheduling cleanups for %s' % store_name)
+ # Check once every minute whether we need to clean
+ task = cherrypy.process.plugins.BackgroundTask(
+ 60, self._maybe_run_cleanup)
+ task.start()
+ Store.__cleanups[store_name] = task
+
+ def _maybe_run_cleanup(self):
+ # Let's see if we need to do cleanup
+ last_clean = self.load_options('dbinfo').get('%s_last_clean' %
+ self.__class__.__name__,
+ {})
+ time_diff = cherrypy.config.get('cleanup_interval', 30) * 60
+ next_ts = int(time.time()) - time_diff
+ self.debug('Considering cleanup for %s: %s. Next at: %s'
+ % (self.__class__.__name__, last_clean, next_ts))
+ if ('timestamp' not in last_clean or
+ int(last_clean['timestamp']) <= next_ts):
+ # First store the current time so that other servers don't start
+ self.save_options('dbinfo', '%s_last_clean'
+ % self.__class__.__name__,
+ {'timestamp': int(time.time()),
+ 'removed_entries': -1})
+
+ # Cleanup has been long enough ago, let's run
+ self.debug('Cleaning up for %s' % self.__class__.__name__)
+ removed_entries = self._cleanup()
+ self.debug('Cleaned up %i entries for %s' %
+ (removed_entries, self.__class__.__name__))
+ self.save_options('dbinfo', '%s_last_clean'
+ % self.__class__.__name__,
+ {'timestamp': int(time.time()),
+ 'removed_entries': removed_entries})
+
+ def _cleanup(self):
+ # The default cleanup is to do nothing
+ # This function should return the number of rows it cleaned up.
+ # This information may be used to automatically tune the clean period.
+ self.error('Cleanup for %s not implemented' %
+ self.__class__.__name__)
+ return 0
def _code_schema_version(self):
# This function makes it possible for separate plugins to have
# the main codebase, and even in the same database.
q = self._query(self._db, 'dbinfo', OPTIONS_TABLE, trans=False)
q.create()
+ q._con.close() # pylint: disable=protected-access
cls_name = self.__class__.__name__
current_version = self.load_options('dbinfo').get('%s_schema'
% cls_name, {})
fallback_version = self.load_options('dbinfo').get('scheme',
{})
if 'version' in fallback_version:
- return int(fallback_version['version'])
+ # Explanation for this is in def upgrade_database(self)
+ return -1
else:
return None
# themselves.
# They might implement downgrading if that's feasible, or just throw
# NotImplementedError
+ # Should return the new schema version
raise NotImplementedError()
def upgrade_database(self):
# Just initialize a new schema
self._initialize_schema()
self._store_new_schema_version(self._code_schema_version())
+ elif old_schema_version == -1:
+ # This is a special-case from 1.0: we only created tables at the
+ # first time they were actually used, but the upgrade code assumes
+ # that the tables exist. So let's fix this.
+ self._initialize_schema()
+ # The old version was schema version 1
+ self._store_new_schema_version(1)
+ self.upgrade_database()
elif old_schema_version != self._code_schema_version():
# Upgrade from old_schema_version to code_schema_version
- self._upgrade_schema(old_schema_version)
- self._store_new_schema_version(self._code_schema_version())
+ self.debug('Upgrading from schema version %i' % old_schema_version)
+ new_version = self._upgrade_schema(old_schema_version)
+ if not new_version:
+ error = ('Schema upgrade error: %s did not provide a ' +
+ 'new schema version number!' %
+ self.__class__.__name__)
+ self.error(error)
+ raise Exception(error)
+ self._store_new_schema_version(new_version)
+ # Check if we are now up-to-date
+ self.upgrade_database()
@property
def is_readonly(self):
q = self._query(self._db, table, columns, trans=False)
rows = q.select(kvfilter)
except Exception, e: # pylint: disable=broad-except
- self.error("Failed to load data for table %s: [%s]" % (table, e))
+ self.error("Failed to load data for table %s for store %s: [%s]"
+ % (table, self.__class__.__name__, e))
return self._rows_to_dict_tree(rows)
def load_config(self):
class AdminStore(Store):
+ _should_cleanup = False
def __init__(self):
super(AdminStore, self).__init__('admin.config.db')
'provider_config']:
q = self._query(self._db, table, OPTIONS_TABLE, trans=False)
q.create()
+ q._con.close() # pylint: disable=protected-access
def _upgrade_schema(self, old_version):
- raise NotImplementedError()
+ if old_version == 1:
+ # In schema version 2, we added indexes and primary keys
+ for table in ['config',
+ 'info_config',
+ 'login_config',
+ 'provider_config']:
+ # pylint: disable=protected-access
+ table = self._query(self._db, table, OPTIONS_TABLE,
+ trans=False)._table
+ self._db.add_constraint(table.primary_key)
+ for index in table.indexes:
+ self._db.add_index(index)
+ return 2
+ else:
+ raise NotImplementedError()
+
+ def create_plugin_data_table(self, plugin_name):
+ if not self.is_readonly:
+ table = plugin_name+'_data'
+ q = self._query(self._db, table, UNIQUE_DATA_TABLE,
+ trans=False)
+ q.create()
+ q._con.close() # pylint: disable=protected-access
class UserStore(Store):
+ _should_cleanup = False
def __init__(self, path=None):
super(UserStore, self).__init__('user.prefs.db')
def _initialize_schema(self):
q = self._query(self._db, 'users', OPTIONS_TABLE, trans=False)
q.create()
+ q._con.close() # pylint: disable=protected-access
def _upgrade_schema(self, old_version):
- raise NotImplementedError()
+ if old_version == 1:
+ # In schema version 2, we added indexes and primary keys
+ # pylint: disable=protected-access
+ table = self._query(self._db, 'users', OPTIONS_TABLE,
+ trans=False)._table
+ self._db.add_constraint(table.primary_key)
+ for index in table.indexes:
+ self._db.add_index(index)
+ return 2
+ else:
+ raise NotImplementedError()
+
+ def create_plugin_data_table(self, plugin_name):
+ if not self.is_readonly:
+ table = plugin_name+'_data'
+ q = self._query(self._db, table, OPTIONS_TABLE,
+ trans=False)
+ q.create()
+ q._con.close() # pylint: disable=protected-access
class TranStore(Store):
def __init__(self, path=None):
super(TranStore, self).__init__('transactions.db')
+ self.table = 'transactions'
def _initialize_schema(self):
- q = self._query(self._db, 'transactions', UNIQUE_DATA_TABLE,
+ q = self._query(self._db, self.table, UNIQUE_DATA_TABLE,
trans=False)
q.create()
+ q._con.close() # pylint: disable=protected-access
def _upgrade_schema(self, old_version):
- raise NotImplementedError()
+ if old_version == 1:
+ # In schema version 2, we added indexes and primary keys
+ # pylint: disable=protected-access
+ table = self._query(self._db, self.table, UNIQUE_DATA_TABLE,
+ trans=False)._table
+ self._db.add_constraint(table.primary_key)
+ for index in table.indexes:
+ self._db.add_index(index)
+ return 2
+ else:
+ raise NotImplementedError()
+
+ def _cleanup(self):
+ # pylint: disable=protected-access
+ table = SqlQuery(self._db, self.table, UNIQUE_DATA_TABLE)._table
+ in_one_hour = datetime.datetime.now() - datetime.timedelta(hours=1)
+ sel = select([table.columns.uuid]). \
+ where(and_(table.c.name == 'origintime',
+ table.c.value <= in_one_hour))
+ # pylint: disable=no-value-for-parameter
+ d = table.delete().where(table.c.uuid.in_(sel))
+ return d.execute().rowcount
class SAML2SessionStore(Store):
raise ValueError("Multiple entries returned")
return data.keys()[0]
- def remove_expired_sessions(self):
+ def _cleanup(self):
# pylint: disable=protected-access
table = SqlQuery(self._db, self.table, UNIQUE_DATA_TABLE)._table
sel = select([table.columns.uuid]). \
table.c.value <= datetime.datetime.now()))
# pylint: disable=no-value-for-parameter
d = table.delete().where(table.c.uuid.in_(sel))
- d.execute()
+ return d.execute().rowcount
def get_data(self, idval=None, name=None, value=None):
return self.get_unique_data(self.table, idval, name, value)
q = self._query(self._db, self.table, UNIQUE_DATA_TABLE,
trans=False)
q.create()
+ q._con.close() # pylint: disable=protected-access
def _upgrade_schema(self, old_version):
- raise NotImplementedError()
+ if old_version == 1:
+ # In schema version 2, we added indexes and primary keys
+ # pylint: disable=protected-access
+ table = self._query(self._db, self.table, UNIQUE_DATA_TABLE,
+ trans=False)._table
+ self._db.add_constraint(table.primary_key)
+ for index in table.indexes:
+ self._db.add_index(index)
+ return 2
+ else:
+ raise NotImplementedError()
projects / cascardo / ipsilon.git / blobdiff