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-rw-r--r--openstack.py40
1 files changed, 26 insertions, 14 deletions
diff --git a/openstack.py b/openstack.py
index 22a2d067..8bbae8d8 100644
--- a/openstack.py
+++ b/openstack.py
@@ -53,6 +53,10 @@ class OpenStackDatabase(CommonBackend):
headers = { 'X-Object-Meta-Rev' : new_rev }
self._connection.put_object(self._container, doc_id, doc.get_json(),
headers=headers)
+ new_gen = self._get_generation() + 1
+ trans_id = self._allocate_transaction_id()
+ self._transaction_log.append((new_gen, doc.doc_id, trans_id))
+ self._set_u1db_data()
return new_rev
def delete_doc(self, doc):
@@ -97,25 +101,27 @@ class OpenStackDatabase(CommonBackend):
raise NotImplementedError(self.close)
def _get_replica_gen_and_trans_id(self, other_replica_uid):
- self._update_u1db_data()
+ self._get_u1db_data()
return self._sync_log.get_replica_gen_and_trans_id(other_replica_uid)
def _set_replica_gen_and_trans_id(self, other_replica_uid,
other_generation, other_transaction_id):
- self._update_u1db_data()
- return self._sync_log.set_replica_gen_and_trans_id(other_replica_uid,
- other_generation, other_transaction_id)
+ self._get_u1db_data()
+ self._sync_log.set_replica_gen_and_trans_id(other_replica_uid,
+ other_generation,
+ other_transaction_id)
+ self._set_u1db_data()
#-------------------------------------------------------------------------
# implemented methods from CommonBackend
#-------------------------------------------------------------------------
def _get_generation(self):
- self._update_u1db_data()
+ self._get_u1db_data()
return self._transaction_log.get_generation()
def _get_generation_info(self):
- self._update_u1db_data()
+ self._get_u1db_data()
return self._transaction_log.get_generation_info()
def _get_doc(self, doc_id, check_for_conflicts=False):
@@ -130,7 +136,7 @@ class OpenStackDatabase(CommonBackend):
def _get_trans_id_for_gen(self, generation):
- self._update_u1db_data()
+ self._get_u1db_data()
trans_id = self._transaction_log.get_trans_id_for_gen(generation)
if trans_id is None:
raise errors.InvalidGeneration
@@ -150,11 +156,17 @@ class OpenStackDatabase(CommonBackend):
self._url, self._auth_token = self._connection.get_auth()
return self._url, self.auth_token
- def _update_u1db_data(self):
+ def _get_u1db_data(self):
data = self.get_doc('u1db_data').content
self._transaction_log = data['transaction_log']
self._sync_log = data['sync_log']
+ def _set_u1db_data(self):
+ doc = self._factory('u1db_data')
+ doc.content = { 'transaction_log' : self._transaction_log,
+ 'sync_log' : self._sync_log }
+ self.put_doc(doc)
+
class OpenStackSyncTarget(HTTPSyncTarget):
@@ -181,6 +193,9 @@ class SimpleLog(object):
def map(self, func):
return map(func, self._log)
+ def filter(self, func):
+ return filter(func, self._log)
+
class TransactionLog(SimpleLog):
"""
@@ -214,6 +229,7 @@ class TransactionLog(SimpleLog):
return None
return log[2]
+
class SyncLog(SimpleLog):
"""
A list of (replica_id, generation, transaction_id) tuples.
@@ -240,11 +256,7 @@ class SyncLog(SimpleLog):
Set the last-known generation and transaction id for the other
database replica.
"""
- old_log = self._log
- self._log = []
- for log in old_log:
- if log[0] != other_replica_uid:
- self.append(log)
+ self._log = self.filter(lambda x: x[0] != other_replica_uid)
self.append((other_replica_uid, other_generation,
other_transaction_id))
-
+