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authorKali Kaneko <kali@leap.se>2013-08-22 17:59:40 +0200
committerKali Kaneko <kali@leap.se>2013-08-22 17:59:40 +0200
commit81acbd1af4c066c471fe01601e7fba0d307e8a46 (patch)
tree6964b3d4b70f39d97101f24dcf139f708b3cffc2
parent0de5ddd4aa0bb2eef41572d61304719939f4f459 (diff)
remove unused dbwrapper
-rw-r--r--client/src/leap/soledad/client/__init__.py1
-rw-r--r--client/src/leap/soledad/client/dbwrapper.py183
2 files changed, 0 insertions, 184 deletions
diff --git a/client/src/leap/soledad/client/__init__.py b/client/src/leap/soledad/client/__init__.py
index fc8219fa..a3b26689 100644
--- a/client/src/leap/soledad/client/__init__.py
+++ b/client/src/leap/soledad/client/__init__.py
@@ -84,7 +84,6 @@ except ImportError:
from leap.soledad.common import soledad_assert, soledad_assert_type
from leap.soledad.common.document import SoledadDocument
from leap.soledad.client.crypto import SoledadCrypto
-from leap.soledad.client.dbwrapper import SQLCipherWrapper
from leap.soledad.client.shared_db import SoledadSharedDatabase
from leap.soledad.client.sqlcipher import open as sqlcipher_open
from leap.soledad.client.sqlcipher import SQLCipherDatabase
diff --git a/client/src/leap/soledad/client/dbwrapper.py b/client/src/leap/soledad/client/dbwrapper.py
deleted file mode 100644
index a27a933e..00000000
--- a/client/src/leap/soledad/client/dbwrapper.py
+++ /dev/null
@@ -1,183 +0,0 @@
-# -*- coding: utf-8 -*-
-# dbwrapper.py
-# Copyright (C) 2013 LEAP
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-"""
-Thread-safe wrapper for sqlite/pysqlcipher.
-
-*TODO*
-At some point we surely will want to switch to a twisted way of dealing
-with this, using defers and proper callbacks. But I had this tested for
-some time so postponing that refactor.
-"""
-import logging
-import threading
-import Queue
-import time
-
-import exceptions
-
-from functools import partial
-
-from leap.soledad.client import sqlcipher
-
-logger = logging.getLogger(__name__)
-
-
-class SQLCipherWrapper(threading.Thread):
-
- def __init__(self, *args, **kwargs):
- """
- Initializes a wrapper that proxies method and attribute
- access to an underlying SQLCipher instance. We instantiate sqlcipher
- in a thread, and all method accesses communicate with it using a
- Queue.
-
- :param *args: position arguments to pass to pysqlcipher initialization
- :type args: tuple
-
- :param **kwargs: keyword arguments to pass to pysqlcipher
- initialization
- :type kwargs: dict
- """
- threading.Thread.__init__(self)
- self._db = None
- self._wrargs = args, kwargs
-
- self._queue = Queue.Queue()
- self._stopped = threading.Event()
-
- self.start()
-
- def _init_db(self):
- """
- Initializes sqlcipher database.
-
- This is called on a separate thread.
- """
- # instantiate u1db
- args, kwargs = self._wrargs
- self._db = sqlcipher.open(*args, **kwargs)
-
- def run(self):
- """
- Main loop for the sqlcipher thread.
- """
- logger.debug("SQLCipherWrapper thread started.")
- logger.debug("Initializing sqlcipher")
- end_mths = ("__end_thread", "_SQLCipherWrapper__end_thread")
-
- self._init_db()
- self._lock = threading.Lock()
-
- ct = 0
- started = False
-
- while True:
- if self._db is None:
- if started:
- break
- if ct > 10:
- break # XXX DEBUG
- logger.debug('db not ready yet, waiting...')
- time.sleep(1)
- ct += 1
-
- started = True
-
- with self._lock:
- try:
- mth, q, wrargs = self._queue.get()
- except:
- logger.error("exception getting args from queue")
-
- res = None
- attr = getattr(self._db, mth, None)
- if not attr:
- if mth not in end_mths:
- logger.error('method %s does not exist' % (mth,))
- res = AttributeError(
- "_db instance has no attribute %s" % mth)
-
- elif callable(attr):
- # invoke the method with the passed args
- args = wrargs.get('args', [])
- kwargs = wrargs.get('kwargs', {})
- try:
- res = attr(*args, **kwargs)
- except Exception as e:
- logger.error(
- "Error on proxied method %s: '%r'." % (
- attr, e))
- res = e
- else:
- # non-callable attribute
- res = attr
- logger.debug('returning proxied db call...')
- q.put(res)
-
- if mth in end_mths:
- logger.debug('ending thread')
- break
-
- logger.debug("SQLCipherWrapper thread terminated.")
- self._stopped.set()
-
- def close(self):
- """
- Closes the sqlcipher database and finishes the thread. This method
- should always be called explicitely.
- """
- self.__getattr__('close')()
- self.__end_thread()
-
- def __getattr__(self, attr):
- """
- Returns _db proxied attributes.
- """
-
- def __proxied_mth(method, *args, **kwargs):
- if not self._stopped.isSet():
- wrargs = {'args': args, 'kwargs': kwargs}
- q = Queue.Queue()
- self._queue.put((method, q, wrargs))
- res = q.get()
- q.task_done()
-
- if isinstance(res, exceptions.BaseException):
- # XXX should get the original bt
- raise res
- return res
- else:
- logger.warning("tried to call proxied meth "
- "but stopped is set: %s" %
- (method,))
-
- rgetattr = object.__getattribute__
-
- if attr != "_db":
- proxied = partial(__proxied_mth, attr)
- return proxied
-
- # fallback to regular behavior
- return rgetattr(self, attr)
-
- def __del__(self):
- """
- Do not trust this get called. No guarantees given. Because of a funny
- dance with the refs and the way the gc works, we should be calling the
- close method explicitely.
- """
- self.close()