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author | drebs <drebs@joselito.semvergonha.org> | 2013-03-07 16:34:22 -0300 |
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committer | drebs <drebs@joselito.semvergonha.org> | 2013-03-07 16:34:22 -0300 |
commit | 1b1def113e6ed9b8af6897e16f0d9b4c96bbfa6b (patch) | |
tree | c34b751dde12bc92628165e8af902da54e39e898 /backends/objectstore.py | |
parent | 4672ec4f25daa6466b2850bea416eaf77fa90d9d (diff) |
Move source files to subfolder.
Diffstat (limited to 'backends/objectstore.py')
-rw-r--r-- | backends/objectstore.py | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/backends/objectstore.py b/backends/objectstore.py deleted file mode 100644 index 7c5d1177..00000000 --- a/backends/objectstore.py +++ /dev/null @@ -1,135 +0,0 @@ -""" -Abstract U1DB backend to handle storage using object stores (like CouchDB, for -example. - -Right now, this is only used by CouchDatabase backend, but can also be -extended to implement OpenStack or Amazon S3 storage, for example. -""" - -from u1db.backends.inmemory import ( - InMemoryDatabase, - InMemorySyncTarget, -) -from u1db import errors - - -class ObjectStoreDatabase(InMemoryDatabase): - """ - A backend for storing u1db data in an object store. - """ - - @classmethod - def open_database(cls, url, create, document_factory=None): - raise NotImplementedError(cls.open_database) - - def __init__(self, replica_uid=None, document_factory=None): - super(ObjectStoreDatabase, self).__init__( - replica_uid, - document_factory=document_factory) - # sync data in memory with data in object store - if not self._get_doc(self.U1DB_DATA_DOC_ID): - self._init_u1db_data() - self._fetch_u1db_data() - - #------------------------------------------------------------------------- - # methods from Database - #------------------------------------------------------------------------- - - def _set_replica_uid(self, replica_uid): - super(ObjectStoreDatabase, self)._set_replica_uid(replica_uid) - self._store_u1db_data() - - def _put_doc(self, doc): - raise NotImplementedError(self._put_doc) - - def _get_doc(self, doc): - raise NotImplementedError(self._get_doc) - - def get_all_docs(self, include_deleted=False): - raise NotImplementedError(self.get_all_docs) - - def delete_doc(self, doc): - """Mark a document as deleted.""" - old_doc = self._get_doc(doc.doc_id, check_for_conflicts=True) - if old_doc is None: - raise errors.DocumentDoesNotExist - if old_doc.rev != doc.rev: - raise errors.RevisionConflict() - if old_doc.is_tombstone(): - raise errors.DocumentAlreadyDeleted - if old_doc.has_conflicts: - raise errors.ConflictedDoc() - new_rev = self._allocate_doc_rev(doc.rev) - doc.rev = new_rev - doc.make_tombstone() - self._put_and_update_indexes(old_doc, doc) - return new_rev - - # index-related methods - - def create_index(self, index_name, *index_expressions): - """ - Create an named index, which can then be queried for future lookups. - """ - raise NotImplementedError(self.create_index) - - def delete_index(self, index_name): - """Remove a named index.""" - super(ObjectStoreDatabase, self).delete_index(index_name) - self._store_u1db_data() - - def _replace_conflicts(self, doc, conflicts): - super(ObjectStoreDatabase, self)._replace_conflicts(doc, conflicts) - self._store_u1db_data() - - def _do_set_replica_gen_and_trans_id(self, other_replica_uid, - other_generation, - other_transaction_id): - super(ObjectStoreDatabase, self)._do_set_replica_gen_and_trans_id( - other_replica_uid, - other_generation, - other_transaction_id) - self._store_u1db_data() - - #------------------------------------------------------------------------- - # implemented methods from CommonBackend - #------------------------------------------------------------------------- - - def _put_and_update_indexes(self, old_doc, doc): - for index in self._indexes.itervalues(): - if old_doc is not None and not old_doc.is_tombstone(): - index.remove_json(old_doc.doc_id, old_doc.get_json()) - if not doc.is_tombstone(): - index.add_json(doc.doc_id, doc.get_json()) - trans_id = self._allocate_transaction_id() - self._put_doc(doc) - self._transaction_log.append((doc.doc_id, trans_id)) - self._store_u1db_data() - - #------------------------------------------------------------------------- - # methods specific for object stores - #------------------------------------------------------------------------- - - U1DB_DATA_DOC_ID = 'u1db_data' - - def _fetch_u1db_data(self): - """ - Fetch u1db configuration data from backend storage. - """ - NotImplementedError(self._fetch_u1db_data) - - def _store_u1db_data(self): - """ - Save u1db configuration data on backend storage. - """ - NotImplementedError(self._store_u1db_data) - - def _init_u1db_data(self): - """ - Initialize u1db configuration data on backend storage. - """ - NotImplementedError(self._init_u1db_data) - - -class ObjectStoreSyncTarget(InMemorySyncTarget): - pass |