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authordrebs <drebs@leap.se>2013-01-15 18:52:56 -0200
committerdrebs <drebs@leap.se>2013-01-15 18:52:56 -0200
commit984a33de1322437e3979e7324ae042daa52d91e9 (patch)
tree743623729dccfc051905f2415add1db7ab8722f8 /util.py
parentcb22f22b7084b5869fc5c9b5fb8b61f234a07ea8 (diff)
Refactor and fix ObjectStore.
Diffstat (limited to 'util.py')
-rw-r--r--util.py159
1 files changed, 1 insertions, 158 deletions
diff --git a/util.py b/util.py
index 8a8bedfb..a26bff31 100644
--- a/util.py
+++ b/util.py
@@ -53,161 +53,4 @@ class GPGWrapper(gnupg.GPG):
return result
-#----------------------------------------------------------------------------
-# u1db Transaction and Sync logs.
-#----------------------------------------------------------------------------
-
-class SimpleLog(object):
- def __init__(self):
- self._log = []
-
- def _set_log(self, log):
- self._log = log
-
- def _get_log(self):
- return self._log
-
- log = property(
- _get_log, _set_log, doc="Log contents.")
-
- def append(self, msg):
- self._log.append(msg)
-
- def reduce(self, func, initializer=None):
- return reduce(func, self._log, initializer)
-
- def map(self, func):
- return map(func, self._get_log())
-
- def filter(self, func):
- return filter(func, self._get_log())
-
-
-class TransactionLog(SimpleLog):
- """
- An ordered list of (generation, doc_id, transaction_id) tuples.
- """
-
- def _set_log(self, log):
- self._log = log
-
- def _get_log(self):
- return sorted(self._log, reverse=True)
-
- log = property(
- _get_log, _set_log, doc="Log contents.")
-
- def get_generation(self):
- """
- Return the current generation.
- """
- gens = self.map(lambda x: x[0])
- if not gens:
- return 0
- return max(gens)
-
- def get_generation_info(self):
- """
- Return the current generation and transaction id.
- """
- if not self._log:
- return(0, '')
- info = self.map(lambda x: (x[0], x[2]))
- return reduce(lambda x, y: x if (x[0] > y[0]) else y, info)
-
- def get_trans_id_for_gen(self, gen):
- """
- Get the transaction id corresponding to a particular generation.
- """
- log = self.reduce(lambda x, y: y if y[0] == gen else x)
- if log is None:
- return None
- return log[2]
-
- def whats_changed(self, old_generation):
- """
- Return a list of documents that have changed since old_generation.
- """
- results = self.filter(lambda x: x[0] > old_generation)
- seen = set()
- changes = []
- newest_trans_id = ''
- for generation, doc_id, trans_id in results:
- if doc_id not in seen:
- changes.append((doc_id, generation, trans_id))
- seen.add(doc_id)
- if changes:
- cur_gen = changes[0][1] # max generation
- newest_trans_id = changes[0][2]
- changes.reverse()
- else:
- results = self._get_log()
- if not results:
- cur_gen = 0
- newest_trans_id = ''
- else:
- cur_gen, _, newest_trans_id = results[0]
-
- return cur_gen, newest_trans_id, changes
-
-
- def get_transaction_log(self):
- """
- Return only a list of (doc_id, transaction_id)
- """
- return map(lambda x: (x[1], x[2]), sorted(self._log))
-
-
-class SyncLog(SimpleLog):
- """
- A list of (replica_id, generation, transaction_id) tuples.
- """
-
- def find_by_replica_uid(self, replica_uid):
- if not self._get_log():
- return ()
- return self.reduce(lambda x, y: y if y[0] == replica_uid else x)
-
- def get_replica_gen_and_trans_id(self, other_replica_uid):
- """
- Return the last known generation and transaction id for the other db
- replica.
- """
- info = self.find_by_replica_uid(other_replica_uid)
- if not info:
- return (0, '')
- return (info[1], info[2])
-
- def set_replica_gen_and_trans_id(self, other_replica_uid,
- other_generation, other_transaction_id):
- """
- Set the last-known generation and transaction id for the other
- database replica.
- """
- self._log = self.filter(lambda x: x[0] != other_replica_uid)
- self.append((other_replica_uid, other_generation,
- other_transaction_id))
-
-class ConflictLog(SimpleLog):
- """
- A list of (doc_id, my_doc_rev, my_content) tuples.
- """
-
- def __init__(self, factory):
- super(ConflictLog, self).__init__()
- self._factory = factory
-
- def delete_conflicts(self, conflicts):
- for conflict in conflicts:
- self._log = self.filter(lambda x:
- x[0] != conflict[0] or x[1] != conflict[1])
-
- def get_conflicts(self, doc_id):
- conflicts = self.filter(lambda x: x[0] == doc_id)
- if not conflicts:
- return []
- return reversed(map(lambda x: self._factory(doc_id, x[1], x[2]),
- conflicts))
-
- def has_conflicts(self, doc_id):
- return bool(self.filter(lambda x: x[0] == doc_id))
+