Relocate DATADIR to backends

It simply makes sense that the definition of DATADIR belongs to
backends. After all, some of them may not even have any.

Coincidentially, a few unnecessary imports are dropped.

By the way, on the object server side, diskfile.py provides DATADIR
in the same way already.

Change-Id: I60bfd522c77c4a0ee13697a2e31141777c7e2398

swift/account/auditor.py

@@ -19,8 +19,7 @@
 from random import random
 
 import swift.common.db
-from swift.account import server as account_server
-from swift.account.backend import AccountBroker
+from swift.account.backend import AccountBroker, DATADIR
 from swift.common.utils import get_logger, audit_location_generator, \
     config_true_value, dump_recon_cache, ratelimit_sleep
 from swift.common.daemon import Daemon
@@ -49,8 +48,7 @@ def __init__(self, conf):
         self.rcache = os.path.join(self.recon_cache_path, "account.recon")
 
     def _one_audit_pass(self, reported):
-        all_locs = audit_location_generator(self.devices,
-                                            account_server.DATADIR, '.db',
+        all_locs = audit_location_generator(self.devices, DATADIR, '.db',
                                             mount_check=self.mount_check,
                                             logger=self.logger)
         for path, device, partition in all_locs:

swift/account/backend.py

@@ -28,6 +28,8 @@
 from swift.common.db import DatabaseBroker, DatabaseConnectionError, \
     PENDING_CAP, PICKLE_PROTOCOL, utf8encode
 
+DATADIR = 'accounts'
+
 
 class AccountBroker(DatabaseBroker):
     """Encapsulates working with an account database."""

swift/account/reaper.py

@@ -23,8 +23,7 @@
 from eventlet import GreenPool, sleep, Timeout
 
 import swift.common.db
-from swift.account.server import DATADIR
-from swift.account.backend import AccountBroker
+from swift.account.backend import AccountBroker, DATADIR
 from swift.common.direct_client import direct_delete_container, \
     direct_delete_object, direct_get_container
 from swift.common.exceptions import ClientException

swift/account/replicator.py

@@ -13,13 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from swift.account import server as account_server
-from swift.account.backend import AccountBroker
+from swift.account.backend import AccountBroker, DATADIR
 from swift.common import db_replicator
 
 
 class AccountReplicator(db_replicator.Replicator):
     server_type = 'account'
     brokerclass = AccountBroker
-    datadir = account_server.DATADIR
+    datadir = DATADIR
     default_port = 6002

swift/account/server.py

@@ -21,7 +21,7 @@
 from eventlet import Timeout
 
 import swift.common.db
-from swift.account.backend import AccountBroker
+from swift.account.backend import AccountBroker, DATADIR
 from swift.account.utils import account_listing_response
 from swift.common.db import DatabaseConnectionError, DatabaseAlreadyExists
 from swift.common.request_helpers import get_param, get_listing_content_type, \
@@ -40,9 +40,6 @@
 from swift.common.request_helpers import is_sys_or_user_meta
 
 
-DATADIR = 'accounts'
-
-
 class AccountController(object):
     """WSGI controller for the account server."""
 

swift/container/auditor.py

@@ -21,8 +21,7 @@
 from eventlet import Timeout
 
 import swift.common.db
-from swift.container import server as container_server
-from swift.container.backend import ContainerBroker
+from swift.container.backend import ContainerBroker, DATADIR
 from swift.common.utils import get_logger, audit_location_generator, \
     config_true_value, dump_recon_cache, ratelimit_sleep
 from swift.common.daemon import Daemon
@@ -49,8 +48,7 @@ def __init__(self, conf):
         self.rcache = os.path.join(self.recon_cache_path, "container.recon")
 
     def _one_audit_pass(self, reported):
-        all_locs = audit_location_generator(self.devices,
-                                            container_server.DATADIR, '.db',
+        all_locs = audit_location_generator(self.devices, DATADIR, '.db',
                                             mount_check=self.mount_check,
                                             logger=self.logger)
         for path, device, partition in all_locs:

swift/container/backend.py

@@ -28,6 +28,8 @@
 from swift.common.db import DatabaseBroker, DatabaseConnectionError, \
     PENDING_CAP, PICKLE_PROTOCOL, utf8encode
 
+DATADIR = 'containers'
+
 
 class ContainerBroker(DatabaseBroker):
     """Encapsulates working with a container database."""

swift/container/replicator.py

@@ -13,15 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from swift.container import server as container_server
-from swift.container.backend import ContainerBroker
+from swift.container.backend import ContainerBroker, DATADIR
 from swift.common import db_replicator
 
 
 class ContainerReplicator(db_replicator.Replicator):
     server_type = 'container'
     brokerclass = ContainerBroker
-    datadir = container_server.DATADIR
+    datadir = DATADIR
     default_port = 6001
 
     def report_up_to_date(self, full_info):

swift/container/server.py

@@ -23,7 +23,7 @@
 from eventlet import Timeout
 
 import swift.common.db
-from swift.container.backend import ContainerBroker
+from swift.container.backend import ContainerBroker, DATADIR
 from swift.common.db import DatabaseAlreadyExists
 from swift.common.container_sync_realms import ContainerSyncRealms
 from swift.common.request_helpers import get_param, get_listing_content_type, \
@@ -43,8 +43,6 @@
     HTTPPreconditionFailed, HTTPMethodNotAllowed, Request, Response, \
     HTTPInsufficientStorage, HTTPException, HeaderKeyDict
 
-DATADIR = 'containers'
-
 
 class ContainerController(object):
     """WSGI Controller for the container server."""

swift/container/sync.py

@@ -23,8 +23,7 @@
 from eventlet import sleep, Timeout
 
 import swift.common.db
-from swift.container import server as container_server
-from swift.container.backend import ContainerBroker
+from swift.container.backend import ContainerBroker, DATADIR
 from swift.common.container_sync_realms import ContainerSyncRealms
 from swift.common.direct_client import direct_get_object
 from swift.common.internal_client import delete_object, put_object
@@ -168,9 +167,7 @@ def run_forever(self, *args, **kwargs):
         sleep(random() * self.interval)
         while True:
             begin = time()
-            all_locs = audit_location_generator(self.devices,
-                                                container_server.DATADIR,
-                                                '.db',
+            all_locs = audit_location_generator(self.devices, DATADIR, '.db',
                                                 mount_check=self.mount_check,
                                                 logger=self.logger)
             for path, device, partition in all_locs:
@@ -187,8 +184,7 @@ def run_once(self, *args, **kwargs):
         """
         self.logger.info(_('Begin container sync "once" mode'))
         begin = time()
-        all_locs = audit_location_generator(self.devices,
-                                            container_server.DATADIR, '.db',
+        all_locs = audit_location_generator(self.devices, DATADIR, '.db',
                                             mount_check=self.mount_check,
                                             logger=self.logger)
         for path, device, partition in all_locs:

swift/container/updater.py

@@ -25,8 +25,7 @@
 from eventlet import spawn, patcher, Timeout
 
 import swift.common.db
-from swift.container.backend import ContainerBroker
-from swift.container.server import DATADIR
+from swift.container.backend import ContainerBroker, DATADIR
 from swift.common.bufferedhttp import http_connect
 from swift.common.exceptions import ConnectionTimeout
 from swift.common.ring import Ring

test/unit/account/test_reaper.py

@@ -24,7 +24,7 @@
 from contextlib import nested
 
 from swift.account import reaper
-from swift.account.server import DATADIR
+from swift.account.backend import DATADIR
 from swift.common.exceptions import ClientException
 from swift.common.utils import normalize_timestamp
 

test/unit/common/test_db_replicator.py

@@ -26,9 +26,9 @@
 import mock
 import simplejson
 
+from swift.container.backend import DATADIR
 from swift.common import db_replicator
 from swift.common.utils import normalize_timestamp
-from swift.container import server as container_server
 from swift.common.exceptions import DriveNotMounted
 from swift.common.swob import HTTPException
 
@@ -247,7 +247,7 @@ class TestReplicator(db_replicator.Replicator):
     server_type = 'container'
     ring_file = 'container.ring.gz'
     brokerclass = FakeBroker
-    datadir = container_server.DATADIR
+    datadir = DATADIR
     default_port = 1000
 
 

test/unit/container/test_updater.py

@@ -25,8 +25,7 @@
 
 from swift.common import utils
 from swift.container import updater as container_updater
-from swift.container import server as container_server
-from swift.container.backend import ContainerBroker
+from swift.container.backend import ContainerBroker, DATADIR
 from swift.common.ring import RingData
 from swift.common.utils import normalize_timestamp
 
@@ -84,7 +83,7 @@ def test_run_once(self):
             'account_suppression_time': 0
         })
         cu.run_once()
-        containers_dir = os.path.join(self.sda1, container_server.DATADIR)
+        containers_dir = os.path.join(self.sda1, DATADIR)
         os.mkdir(containers_dir)
         cu.run_once()
         self.assert_(os.path.exists(containers_dir))
@@ -167,7 +166,7 @@ def test_unicode(self):
             'concurrency': '1',
             'node_timeout': '15',
         })
-        containers_dir = os.path.join(self.sda1, container_server.DATADIR)
+        containers_dir = os.path.join(self.sda1, DATADIR)
         os.mkdir(containers_dir)
         subdir = os.path.join(containers_dir, 'subdir')
         os.mkdir(subdir)