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authordrebs <drebs@leap.se>2012-12-24 10:14:24 -0200
committerdrebs <drebs@leap.se>2012-12-24 10:14:24 -0200
commitca5fb41a55e1292005ed186baf3710831d9ad678 (patch)
treeac7eb9e8f5d993732e769607903ef626518749cd /src/leap/soledad/backends/openstack.py
parent564b82fa30ebcd8a0abfea54e00506dd77446a54 (diff)
parent277f17aa7b7bbcc48583149a3d72d8621f83c0ff (diff)
Merge branch 'feature/u1db-openstack-backend' into develop
Diffstat (limited to 'src/leap/soledad/backends/openstack.py')
-rw-r--r--src/leap/soledad/backends/openstack.py98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/leap/soledad/backends/openstack.py b/src/leap/soledad/backends/openstack.py
new file mode 100644
index 00000000..c027231c
--- /dev/null
+++ b/src/leap/soledad/backends/openstack.py
@@ -0,0 +1,98 @@
+from u1db import errors
+from u1db.remote.http_target import HTTPSyncTarget
+from swiftclient import client
+from soledad.backends.objectstore import ObjectStore
+
+
+class OpenStackDatabase(ObjectStore):
+ """A U1DB implementation that uses OpenStack as its persistence layer."""
+
+ def __init__(self, auth_url, user, auth_key, container):
+ """Create a new OpenStack data container."""
+ self._auth_url = auth_url
+ self._user = user
+ self._auth_key = auth_key
+ self._container = container
+ self._connection = swiftclient.Connection(self._auth_url, self._user,
+ self._auth_key)
+ self._get_auth()
+ # this will ensure transaction and sync logs exist and are up-to-date.
+ super(OpenStackDatabase, self).__init__()
+
+ #-------------------------------------------------------------------------
+ # implemented methods from Database
+ #-------------------------------------------------------------------------
+
+ def _get_doc(self, doc_id, check_for_conflicts=False):
+ """Get just the document content, without fancy handling.
+
+ Conflicts do not happen on server side, so there's no need to check
+ for them.
+ """
+ try:
+ response, contents = self._connection.get_object(self._container, doc_id)
+ # TODO: change revision to be a dictionary element?
+ rev = response['x-object-meta-rev']
+ return self._factory(doc_id, rev, contents)
+ except swiftclient.ClientException:
+ return None
+
+ def get_all_docs(self, include_deleted=False):
+ """Get all documents from the database."""
+ generation = self._get_generation()
+ results = []
+ _, doc_ids = self._connection.get_container(self._container,
+ full_listing=True)
+ for doc_id in doc_ids:
+ doc = self._get_doc(doc_id)
+ if doc.content is None and not include_deleted:
+ continue
+ results.append(doc)
+ return (generation, results)
+
+ def _put_doc(self, doc, new_rev):
+ new_rev = self._allocate_doc_rev(doc.rev)
+ # TODO: change revision to be a dictionary element?
+ headers = { 'X-Object-Meta-Rev' : new_rev }
+ self._connection.put_object(self._container, doc_id, doc.get_json(),
+ headers=headers)
+
+ def get_sync_target(self):
+ return OpenStackSyncTarget(self)
+
+ def close(self):
+ raise NotImplementedError(self.close)
+
+ def sync(self, url, creds=None, autocreate=True):
+ from u1db.sync import Synchronizer
+ from u1db.remote.http_target import OpenStackSyncTarget
+ return Synchronizer(self, OpenStackSyncTarget(url, creds=creds)).sync(
+ autocreate=autocreate)
+
+ #-------------------------------------------------------------------------
+ # OpenStack specific methods
+ #-------------------------------------------------------------------------
+
+ def _get_auth(self):
+ self._url, self._auth_token = self._connection.get_auth()
+ return self._url, self.auth_token
+
+class OpenStackSyncTarget(HTTPSyncTarget):
+
+ def get_sync_info(self, source_replica_uid):
+ source_gen, source_trans_id = self._db._get_replica_gen_and_trans_id(
+ source_replica_uid)
+ my_gen, my_trans_id = self._db._get_generation_info()
+ return (
+ self._db._replica_uid, my_gen, my_trans_id, source_gen,
+ source_trans_id)
+
+ def record_sync_info(self, source_replica_uid, source_replica_generation,
+ source_replica_transaction_id):
+ if self._trace_hook:
+ self._trace_hook('record_sync_info')
+ self._db._set_replica_gen_and_trans_id(
+ source_replica_uid, source_replica_generation,
+ source_replica_transaction_id)
+
+