Commit c0e76eed authored by Shane Hathaway's avatar Shane Hathaway

Fixed a couple of blob storage issues:

- The "lawn" layout was being selected by default if the root of
  the blob directory happened to contain a hidden file or directory
  such as ".svn".  Now hidden files and directories are ignored
  when choosing the default layout.

- BlobStorage was not compatible with MVCC storages because the
  wrappers were being removed by each database connection.  There
  was also a problem with subtransactions.  Fixed.
parent e04d43b9
......@@ -22,6 +22,14 @@ Bugs Fixed
- zeopack was less flexible than it was before. -h should default to
local host.
- The "lawn" layout was being selected by default if the root of
the blob directory happened to contain a hidden file or directory
such as ".svn". Now hidden files and directories are ignored
when choosing the default layout.
- BlobStorage was not compatible with MVCC storages because the
wrappers were being removed by each database connection. Fixed.
3.9.0b2 (2009-06-11)
====================
......
......@@ -334,10 +334,6 @@ class Connection(ExportImport, object):
def invalidate(self, tid, oids):
"""Notify the Connection that transaction 'tid' invalidated oids."""
if self._mvcc_storage:
# Inter-connection invalidation is not needed when the
# storage provides MVCC.
return
if self.before is not None:
# this is an historical connection. Invalidations are irrelevant.
return
......@@ -771,6 +767,10 @@ class Connection(ExportImport, object):
"""Indicate confirmation that the transaction is done."""
def callback(tid):
if self._mvcc_storage:
# Inter-connection invalidation is not needed when the
# storage provides MVCC.
return
d = dict.fromkeys(self._modified)
self._db.invalidate(tid, d, self)
# It's important that the storage calls the passed function
......
......@@ -502,23 +502,30 @@ def auto_layout_select(path):
# A heuristic to look at a path and determine which directory layout to
# use.
layout_marker = os.path.join(path, LAYOUT_MARKER)
if not os.path.exists(path):
if os.path.exists(layout_marker):
layout = open(layout_marker, 'rb').read()
layout = layout.strip()
log('Blob directory `%s` has layout marker set. '
'Selected `%s` layout. ' % (path, layout), level=logging.DEBUG)
elif not os.path.exists(path):
log('Blob directory %s does not exist. '
'Selected `bushy` layout. ' % path)
layout = 'bushy'
elif len(os.listdir(path)) == 0:
else:
# look for a non-hidden file in the directory
has_files = False
for name in os.listdir(path):
if not name.startswith('.'):
has_files = True
break
if not has_files:
log('Blob directory `%s` is unused and has no layout marker set. '
'Selected `bushy` layout. ' % path)
layout = 'bushy'
elif LAYOUT_MARKER not in os.listdir(path):
else:
log('Blob directory `%s` is used but has no layout marker set. '
'Selected `lawn` layout. ' % path)
layout = 'lawn'
else:
layout = open(layout_marker, 'rb').read()
layout = layout.strip()
log('Blob directory `%s` has layout marker set. '
'Selected `%s` layout. ' % (path, layout), level=logging.DEBUG)
return layout
......@@ -861,6 +868,18 @@ class BlobStorage(SpecificationDecoratorBase):
self._lock_release()
return undo_serial, keys
@non_overridable
def new_instance(self):
"""Implementation of IMVCCStorage.new_instance.
This method causes all storage instances to be wrapped with
a blob storage wrapper.
"""
base_dir = self.fshelper.base_dir
s = getProxiedObject(self).new_instance()
res = BlobStorage(base_dir, s)
return res
for name, v in BlobStorageMixin.__dict__.items():
if isinstance(v, type(BlobStorageMixin.__dict__['storeBlob'])):
......
......@@ -106,9 +106,9 @@ already been used to create a lawn structure.
'lawn'
>>> shutil.rmtree('blobs')
4. If the directory does not contain a marker but other files, we assume that
it was created with an earlier version of the blob implementation and uses our
`lawn` layout:
4. If the directory does not contain a marker but other files that are
not hidden, we assume that it was created with an earlier version of
the blob implementation and uses our `lawn` layout:
>>> os.mkdir('blobs')
>>> open(os.path.join('blobs', '0x0101'), 'wb').write('foo')
......@@ -116,6 +116,14 @@ it was created with an earlier version of the blob implementation and uses our
'lawn'
>>> shutil.rmtree('blobs')
5. If the directory contains only hidden files, use the bushy layout:
>>> os.mkdir('blobs')
>>> open(os.path.join('blobs', '.svn'), 'wb').write('blah')
>>> auto_layout_select('blobs')
'bushy'
>>> shutil.rmtree('blobs')
Directory layout markers
========================
......
......@@ -37,7 +37,7 @@ Put some revisions of a blob object in our database and on the filesystem:
>>> blob.open('w').write('this is blob data 0')
>>> root['blob'] = blob
>>> transaction.commit()
>>> tids.append(blob_storage._tid)
>>> tids.append(blob._p_serial)
>>> nothing = transaction.begin()
>>> times.append(new_time())
......
......@@ -174,7 +174,7 @@ connections should result in a write conflict error::
>>> tm2.commit()
Traceback (most recent call last):
...
ConflictError: database conflict error (oid 0x01, class ZODB.blob.Blob)
ConflictError: database conflict error (oid 0x01, class ZODB.blob.Blob...)
After the conflict, the winning transaction's result is visible on both
connections::
......
......@@ -18,7 +18,8 @@ from persistent.mapping import PersistentMapping
import transaction
from ZODB.DB import DB
from ZODB.tests.MVCCMappingStorage import MVCCMappingStorage
import ZODB.blob
import ZODB.tests.testblob
from ZODB.tests import (
BasicStorage,
......@@ -167,9 +168,20 @@ class MVCCMappingStorageTests(
self._storage.tpc_begin(t)
self.assertEqual(self._storage._tid, 'zzzzzzzz')
def create_blob_storage(name, blob_dir):
s = MVCCMappingStorage(name)
return ZODB.blob.BlobStorage(blob_dir, s)
def test_suite():
suite = unittest.makeSuite(MVCCMappingStorageTests, 'check')
# Note: test_packing doesn't work because even though MVCCMappingStorage
# retains history, it does not provide undo methods, so the
# BlobStorage wrapper calls _packNonUndoing instead of _packUndoing,
# causing blobs to get deleted even though object states are retained.
suite.addTest(ZODB.tests.testblob.storage_reusable_suite(
'MVCCMapping', create_blob_storage,
test_undo=False,
))
return suite
if __name__ == "__main__":
......
......@@ -476,7 +476,7 @@ def loadblob_tmpstore():
>>> import transaction
>>> transaction.commit()
>>> blob_oid = root['blob']._p_oid
>>> tid = blob_storage.lastTransaction()
>>> tid = connection._storage.lastTransaction()
Now we open a database with a TmpStore in front:
......@@ -556,6 +556,7 @@ def setUpBlobAdaptedFileStorage(test):
def storage_reusable_suite(prefix, factory,
test_blob_storage_recovery=False,
test_packing=False,
test_undo=True,
):
"""Return a test suite for a generic IBlobStorage.
......@@ -605,6 +606,7 @@ def storage_reusable_suite(prefix, factory,
if test_blob_storage_recovery:
add_test_based_on_test_class(RecoveryBlobStorage)
if test_undo:
add_test_based_on_test_class(BlobUndoTests)
suite.layer = ZODB.tests.util.MininalTestLayer(prefix+'BlobTests')
......
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