diff options
Diffstat (limited to 'backends/objectstore.py')
| -rw-r--r-- | backends/objectstore.py | 69 |
1 files changed, 59 insertions, 10 deletions
diff --git a/backends/objectstore.py b/backends/objectstore.py index 54ffa9dd..cd051588 100644 --- a/backends/objectstore.py +++ b/backends/objectstore.py @@ -16,6 +16,7 @@ class ObjectStore(CommonBackend): self.set_document_factory(Document) self._sync_log = soledadutil.SyncLog() self._transaction_log = soledadutil.TransactionLog() + self._conflict_log = soledadutil.ConflictLog() self._replica_uid = replica_uid self._ensure_u1db_data() @@ -44,6 +45,12 @@ class ObjectStore(CommonBackend): def _put_doc(self, doc): raise NotImplementedError(self._put_doc) + def _update_gen_and_transaction_log(self, doc_id): + new_gen = self._get_generation() + 1 + trans_id = self._allocate_transaction_id() + self._transaction_log.append((new_gen, doc_id, trans_id)) + self._set_u1db_data() + def put_doc(self, doc): # consistency check if doc.doc_id is None: @@ -66,11 +73,7 @@ class ObjectStore(CommonBackend): new_rev = self._allocate_doc_rev(doc.rev) doc.rev = new_rev self._put_doc(doc) - # update u1db generation and logs - 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() + self._update_gen_and_transaction_log(doc.doc_id) return doc.rev def delete_doc(self, doc): @@ -87,6 +90,7 @@ class ObjectStore(CommonBackend): doc.rev = new_rev doc.make_tombstone() self._put_doc(doc) + self._update_gen_and_transaction_log(doc.doc_id) return new_rev # start of index-related methods: these are not supported by this backend. @@ -130,6 +134,16 @@ class ObjectStore(CommonBackend): other_transaction_id) self._set_u1db_data() + def _do_set_replica_gen_and_trans_id(self, other_replica_uid, + other_generation, other_transaction_id): + return self._set_replica_gen_and_trans_id( + other_replica_uid, + other_generation, + other_transaction_id) + + def _get_transaction_log(self): + return self._transaction_log.get_transaction_log() + #------------------------------------------------------------------------- # implemented methods from CommonBackend #------------------------------------------------------------------------- @@ -146,9 +160,10 @@ class ObjectStore(CommonBackend): # Documents never have conflicts on server. return False - def _put_and_update_indexes(self, doc_id, old_doc, new_rev, content): - raise NotImplementedError(self._put_and_update_indexes) - + def _put_and_update_indexes(self, old_doc, doc): + # TODO: implement index update + self._put_doc(doc) + self._update_gen_and_transaction_log(doc.doc_id) def _get_trans_id_for_gen(self, generation): self._get_u1db_data() @@ -187,8 +202,9 @@ class ObjectStore(CommonBackend): if self._replica_uid is None: self._replica_uid = uuid.uuid4().hex doc = self._factory(doc_id=self.U1DB_DATA_DOC_ID) - doc.content = { 'transaction_log' : [], - 'sync_log' : [], + doc.content = { 'sync_log' : [], + 'transaction_log' : [], + 'conflict_log' : [], 'replica_uid' : self._replica_uid } self._put_doc(doc) @@ -213,3 +229,36 @@ class ObjectStore(CommonBackend): replica_uid = property( _get_replica_uid, _set_replica_uid, doc="Replica UID of the database") + + + #------------------------------------------------------------------------- + # The methods below were cloned from u1db sqlite backend. They should at + # least exist and raise a NotImplementedError exception in CommonBackend + # (should we maybe fill a bug in u1db bts?). + #------------------------------------------------------------------------- + + def _add_conflict(self, doc_id, my_doc_rev, my_content): + self._conflict_log.append((doc_id, my_doc_rev, my_content)) + + def _delete_conflicts(self, doc, conflict_revs): + deleting = [(doc.doc_id, c_rev) for c_rev in conflict_revs] + self._conflict_log.delete_conflicts(deleting) + doc.has_conflicts = self._has_conflicts(doc.doc_id) + + def _prune_conflicts(self, doc, doc_vcr): + if self._has_conflicts(doc.doc_id): + autoresolved = False + c_revs_to_prune = [] + for c_doc in self._get_conflicts(doc.doc_id): + c_vcr = vectorclock.VectorClockRev(c_doc.rev) + if doc_vcr.is_newer(c_vcr): + c_revs_to_prune.append(c_doc.rev) + elif doc.same_content_as(c_doc): + c_revs_to_prune.append(c_doc.rev) + doc_vcr.maximize(c_vcr) + autoresolved = True + if autoresolved: + doc_vcr.increment(self._replica_uid) + doc.rev = doc_vcr.as_str() + c = self._db_handle.cursor() + self._delete_conflicts(c, doc, c_revs_to_prune) |