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authordrebs <drebs@leap.se>2012-12-06 11:15:42 -0200
committerdrebs <drebs@leap.se>2012-12-06 11:15:42 -0200
commit7f9d25e79266e64b03a57a34fb799e41a0cab678 (patch)
tree079ebfe2748812306e3d0742ab930f7e092af9d7 /backends/openstack.py
parent84e4bf0a810e097f7d4a4aed7bfc611050392afd (diff)
Move log classes so all backends can use them.
Diffstat (limited to 'backends/openstack.py')
-rw-r--r--backends/openstack.py124
1 files changed, 0 insertions, 124 deletions
diff --git a/backends/openstack.py b/backends/openstack.py
index ec4609b4..6c971485 100644
--- a/backends/openstack.py
+++ b/backends/openstack.py
@@ -32,8 +32,6 @@ class OpenStackDatabase(CommonBackend):
def whats_changed(self, old_generation=0):
self._get_u1db_data()
- # This method is implemented in TransactionLog because testing is
- # easier like this for now, but it can be moved to here afterwards.
return self._transaction_log.whats_changed(old_generation)
def _get_doc(self, doc_id, check_for_conflicts=False):
@@ -245,125 +243,3 @@ class OpenStackSyncTarget(HTTPSyncTarget):
source_replica_transaction_id)
-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.log)
-
- def filter(self, func):
- return filter(func, self.log)
-
-
-class TransactionLog(SimpleLog):
- """
- A 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):
- 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.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
-
-
-
-class SyncLog(SimpleLog):
- """
- A list of (replica_id, generation, transaction_id) tuples.
- """
-
- def find_by_replica_uid(self, replica_uid):
- if not self.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))
-