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-rw-r--r--client/src/leap/soledad/client/adbapi.py101
1 files changed, 95 insertions, 6 deletions
diff --git a/client/src/leap/soledad/client/adbapi.py b/client/src/leap/soledad/client/adbapi.py
index 0cdc90eb..9ae2889e 100644
--- a/client/src/leap/soledad/client/adbapi.py
+++ b/client/src/leap/soledad/client/adbapi.py
@@ -37,6 +37,23 @@ if DEBUG_SQL:
def getConnectionPool(opts, openfun=None, driver="pysqlcipher"):
+ """
+ Return a connection pool.
+
+ :param opts:
+ Options for the SQLCipher connection.
+ :type opts: SQLCipherOptions
+ :param openfun:
+ Callback invoked after every connect() on the underlying DB-API
+ object.
+ :type openfun: callable
+ :param driver:
+ The connection driver.
+ :type driver: str
+
+ :return: A U1DB connection pool.
+ :rtype: U1DBConnectionPool
+ """
if openfun is None and driver == "pysqlcipher":
openfun = partial(soledad_sqlcipher.set_init_pragmas, opts=opts)
return U1DBConnectionPool(
@@ -45,14 +62,29 @@ def getConnectionPool(opts, openfun=None, driver="pysqlcipher"):
class U1DBConnection(adbapi.Connection):
+ """
+ A wrapper for a U1DB connection instance.
+ """
u1db_wrapper = soledad_sqlcipher.SoledadSQLCipherWrapper
+ """
+ The U1DB wrapper to use.
+ """
def __init__(self, pool, init_u1db=False):
+ """
+ :param pool: The pool of connections to that owns this connection.
+ :type pool: adbapi.ConnectionPool
+ :param init_u1db: Wether the u1db database should be initialized.
+ :type init_u1db: bool
+ """
self.init_u1db = init_u1db
adbapi.Connection.__init__(self, pool)
def reconnect(self):
+ """
+ Reconnect to the U1DB database.
+ """
if self._connection is not None:
self._pool.disconnect(self._connection)
self._connection = self._pool.connect()
@@ -61,29 +93,51 @@ class U1DBConnection(adbapi.Connection):
self._u1db = self.u1db_wrapper(self._connection)
def __getattr__(self, name):
+ """
+ Route the requested attribute either to the U1DB wrapper or to the
+ connection.
+
+ :param name: The name of the attribute.
+ :type name: str
+ """
if name.startswith('u1db_'):
- meth = re.sub('^u1db_', '', name)
- return getattr(self._u1db, meth)
+ attr = re.sub('^u1db_', '', name)
+ return getattr(self._u1db, attr)
else:
return getattr(self._connection, name)
-
class U1DBTransaction(adbapi.Transaction):
+ """
+ A wrapper for a U1DB 'cursor' object.
+ """
def __getattr__(self, name):
+ """
+ Route the requested attribute either to the U1DB wrapper of the
+ connection or to the actual connection cursor.
+
+ :param name: The name of the attribute.
+ :type name: str
+ """
if name.startswith('u1db_'):
- meth = re.sub('^u1db_', '', name)
- return getattr(self._connection._u1db, meth)
+ attr = re.sub('^u1db_', '', name)
+ return getattr(self._connection._u1db, attr)
else:
return getattr(self._cursor, name)
class U1DBConnectionPool(adbapi.ConnectionPool):
+ """
+ Represent a pool of connections to an U1DB database.
+ """
connectionFactory = U1DBConnection
transactionFactory = U1DBTransaction
def __init__(self, *args, **kwargs):
+ """
+ Initialize the connection pool.
+ """
adbapi.ConnectionPool.__init__(self, *args, **kwargs)
# all u1db connections, hashed by thread-id
self._u1dbconnections = {}
@@ -91,15 +145,48 @@ class U1DBConnectionPool(adbapi.ConnectionPool):
# The replica uid, primed by the connections on init.
self.replica_uid = ProxyBase(None)
+ conn = self.connectionFactory(self, init_u1db=True)
+ replica_uid = conn._u1db._real_replica_uid
+ setProxiedObject(self.replica_uid, replica_uid)
+
def runU1DBQuery(self, meth, *args, **kw):
+ """
+ Execute a U1DB query in a thread, using a pooled connection.
+
+ :param meth: The U1DB wrapper method name.
+ :type meth: str
+
+ :return: a Deferred which will fire the return value of
+ 'self._runU1DBQuery(Transaction(...), *args, **kw)', or a Failure.
+ :rtype: twisted.internet.defer.Deferred
+ """
meth = "u1db_%s" % meth
return self.runInteraction(self._runU1DBQuery, meth, *args, **kw)
def _runU1DBQuery(self, trans, meth, *args, **kw):
+ """
+ Execute a U1DB query.
+
+ :param trans: An U1DB transaction.
+ :type trans: adbapi.Transaction
+ :param meth: the U1DB wrapper method name.
+ :type meth: str
+ """
meth = getattr(trans, meth)
return meth(*args, **kw)
def _runInteraction(self, interaction, *args, **kw):
+ """
+ Interact with the database and return the result.
+
+ :param interaction:
+ A callable object whose first argument is an
+ L{adbapi.Transaction}.
+ :type interaction: callable
+ :return: a Deferred which will fire the return value of
+ 'interaction(Transaction(...), *args, **kw)', or a Failure.
+ :rtype: twisted.internet.defer.Deferred
+ """
tid = self.threadID()
u1db = self._u1dbconnections.get(tid)
conn = self.connectionFactory(self, init_u1db=not bool(u1db))
@@ -107,7 +194,6 @@ class U1DBConnectionPool(adbapi.ConnectionPool):
if self.replica_uid is None:
replica_uid = conn._u1db._real_replica_uid
setProxiedObject(self.replica_uid, replica_uid)
- print "GOT REPLICA UID IN DBPOOL", self.replica_uid
if u1db is None:
self._u1dbconnections[tid] = conn._u1db
@@ -129,6 +215,9 @@ class U1DBConnectionPool(adbapi.ConnectionPool):
raise excType, excValue, excTraceback
def finalClose(self):
+ """
+ A final close, only called by the shutdown trigger.
+ """
self.shutdownID = None
self.threadpool.stop()
self.running = False