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Commit 66cd2dca authored by Jim Fulton's avatar Jim Fulton
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Reimplemented DemoStorage to be just a wrapper around a base storage 

and a changes storage.
parent 3c6c5ef2
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src/ZODB/DemoStorage.py
View file @ 66cd2dca
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# Copyright (c) Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
......@@ -13,592 +13,153 @@
##############################################################################
"""Demo ZODB storage
The Demo storage serves two purposes:
A demo storage supports demos by allowing a volatile changed database
to be layered over a base database.
- Provide an example implementation of a full storage without
distracting storage details,
- Provide a volatile storage that is useful for giving demonstrations.
The demo storage can have a "base" storage that is used in a
read-only fashion. The base storage must not contain version
data.
There are three main data structures:
_data -- Transaction logging information necessary for undo
This is a mapping from transaction id to transaction, where
a transaction is simply a 5-tuple:
packed, user, description, extension_data, records
where extension_data is a dictionary or None and records are the
actual records in chronological order. Packed is a flag
indicating whethe the transaction has been packed or not
_index -- A mapping from oid to record
_vindex -- A mapping from version name to version data
where version data is a mapping from oid to record
A record is a tuple:
oid, pre, vdata, p, tid
where:
oid -- object id
pre -- The previous record for this object (or None)
vdata -- version data
None if not a version, ortherwise:
version, non-version-record
p -- the pickle data or None
tid -- the transaction id that wrote the record
The pickle data will be None for a record for an object created in
an aborted version.
It is instructive to watch what happens to the internal data structures
as changes are made. For example, in Zope, you can create an external
method::
import Zope2
def info(RESPONSE):
RESPONSE['Content-type']= 'text/plain'
return Zope2.DB._storage._splat()
and call it to monitor the storage.
The base storage must not change.
"""
import random
import threading
import ZODB.MappingStorage
import ZODB.POSException
import ZODB.utils
class DemoStorage:
def __init__(self, name=None, base=None, changes=None):
if base is None:
base = ZODB.MappingStorage.MappingStorage()
self.base = base
if changes is None:
changes = ZODB.MappingStorage.MappingStorage()
self.changes = changes
if name is None:
name = 'DemoStorage(%r, %r)' % (base.getName(), changes.getName())
self.__name__ = name
supportsUndo = getattr(changes, 'supportsUndo', None)
if supportsUndo is not None and supportsUndo():
for meth in ('supportsUndo', 'undo', 'undoLog', 'undoInfo'):
setattr(self, meth, getattr(changes, meth))
for meth in (
'_lock_acquire', '_lock_release',
'getSize', 'history', 'isReadOnly', 'registerDB',
'sortKey', 'tpc_begin', 'tpc_abort', 'tpc_finish',
'tpc_transaction', 'tpc_vote',
):
setattr(self, meth, getattr(changes, meth))
lastInvalidations = getattr(changes, 'lastInvalidations', None)
if lastInvalidations is not None:
self.lastInvalidations = lastInvalidations
import cPickle
import base64, time
import ZODB.BaseStorage
import ZODB.interfaces
import zope.interface
from ZODB import POSException
from ZODB.utils import z64, oid_repr
from persistent.TimeStamp import TimeStamp
from BTrees import OOBTree
class DemoStorage(ZODB.BaseStorage.BaseStorage):
"""Demo storage
Demo storages provide useful storages for writing tests because
they store their data in memory and throw away their data
(implicitly) when they are closed.
They were originally designed to allow demonstrations using base
data provided on a CD. They can optionally wrap an *unchanging*
base storage. It is critical that the base storage does not
change. Using a changing base storage is not just unsupported, it
is known not to work and can even lead to serious errors and even
core dumps.
"""
zope.interface.implements(ZODB.interfaces.IStorageIteration)
def __init__(self, name='Demo Storage', base=None, quota=None):
ZODB.BaseStorage.BaseStorage.__init__(self, name, base)
# We use a BTree because the items are sorted!
self._data = OOBTree.OOBTree()
self._index = {}
self._vindex = {}
self._base = base
self._size = 0
self._quota = quota
self._ltid = None
self._clear_temp()
try:
versions = base.versions
except AttributeError:
pass
else:
if base.versions():
raise POSException.StorageError(
"Demo base storage has version data")
# When DemoStorage needs to create a new oid, and there is a base
# storage, it must use that storage's new_oid() method. Else
# DemoStorage may end up assigning "new" oids that are already in use
# by the base storage, leading to a variety of "impossible" problems.
def new_oid(self):
if self._base is None:
return ZODB.BaseStorage.BaseStorage.new_oid(self)
else:
return self._base.new_oid()
def __len__(self):
base=self._base
return (base and len(base) or 0) + len(self._index)
def getSize(self):
s=100
for tid, (p, u, d, e, t) in self._data.items():
s=s+16+24+12+4+16+len(u)+16+len(d)+16+len(e)+16
for oid, pre, vdata, p, tid in t:
s=s+16+24+24+4+4+(p and (16+len(p)) or 4)
if vdata: s=s+12+16+len(vdata[0])+4
s=s+16*len(self._index)
for v in self._vindex.values():
s=s+32+16*len(v)
def cleanup(self):
self.base.cleanup()
self.changes.cleanup()
self._size=s
return s
def close(self):
self.base.close()
self.changes.close()
def abortVersion(self, src, transaction):
if transaction is not self._transaction:
raise POSException.StorageTransactionError(self, transaction)
if not src:
raise POSException.VersionCommitError("Invalid version")
def getName(self):
return self.__name__
__repr__ = getName
self._lock_acquire()
def getTid(self, oid):
try:
v = self._vindex.get(src, None)
if not v:
return
oids = []
for r in v.values():
oid, pre, (version, nv), p, tid = r
oids.append(oid)
if nv:
oid, pre, vdata, p, tid = nv
self._tindex.append([oid, r, None, p, self._tid])
else:
# effectively, delete the thing
self._tindex.append([oid, r, None, None, self._tid])
return self.changes.getTid(oid)
except ZODB.POSException.POSKeyError:
return self.base.getTid(oid)
return self._tid, oids
finally: self._lock_release()
def iterator(self, start=None, end=None):
for t in self.base.iterator(start, end):
yield t
for t in self.changes.iterator(start, end):
yield t
def commitVersion(self, src, dest, transaction):
if transaction is not self._transaction:
raise POSException.StorageTransactionError(self, transaction)
def lastTransaction(self):
t = self.changes.lastTransaction()
if t == ZODB.utils.z64:
t = self.base.lastTransaction()
return t
if not src:
raise POSException.VersionCommitError("Invalid source version")
if src == dest:
raise POSException.VersionCommitError(
"Can't commit to same version: %s" % repr(src))
def __len__(self):
return len(self.changes)
self._lock_acquire()
def load(self, oid, version=''):
try:
v = self._vindex.get(src)
if v is None:
return
newserial = self._tid
tindex = self._tindex
oids = []
for r in v.values():
oid, pre, vdata, p, tid = r
assert vdata is not None
oids.append(oid)
if dest:
new_vdata = dest, vdata[1]
else:
new_vdata = None
tindex.append([oid, r, new_vdata, p, self._tid])
return self._tid, oids
finally:
self._lock_release()
return self.changes.load(oid, version)
except ZODB.POSException.POSKeyError:
return self.base.load(oid, version)
def load(self, oid, version):
self._lock_acquire()
def loadBefore(self, oid, tid):
try:
result = self.changes.loadBefore(oid, tid)
except ZODB.POSException.POSKeyError:
# The oid isn't in the changes, so defer to base
return self.base.loadBefore(oid, tid)
if result is None:
# The oid *was* in the changes, but there aren't any
# earlier records. Maybe there are in the base.
try:
oid, pre, vdata, p, tid = self._index[oid]
except KeyError:
if self._base:
return self._base.load(oid, version)
raise KeyError(oid)
if vdata:
oversion, nv = vdata
if oversion != version:
if nv:
# Return the current txn's tid with the non-version
# data.
p = nv[3]
else:
raise KeyError(oid)
if p is None:
raise KeyError(oid)
return self.base.loadBefore(oid, tid)
except ZODB.POSException.POSKeyError:
# The oid isn't in the base, so None will be the right result
pass
return p, tid
finally: self._lock_release()
return result
def modifiedInVersion(self, oid):
self._lock_acquire()
def loadSerial(self, oid, serial):
try:
try:
oid, pre, vdata, p, tid = self._index[oid]
if vdata: return vdata[0]
return ''
except: return ''
finally: self._lock_release()
def store(self, oid, serial, data, version, transaction):
if transaction is not self._transaction:
raise POSException.StorageTransactionError(self, transaction)
return self.changes.loadSerial(oid, serial)
except ZODB.POSException.POSKeyError:
return self.base.loadSerial(oid, serial)
self._lock_acquire()
try:
old = self._index.get(oid, None)
if old is None:
# Hm, nothing here, check the base version:
if self._base:
def new_oid(self):
while 1:
oid = ZODB.utils.p64(random.randint(1, 9223372036854775807))
try:
p, tid = self._base.load(oid, '')
except KeyError:
self.changes.load(oid, '')
except ZODB.POSException.POSKeyError:
pass
else:
old = oid, None, None, p, tid
nv=None
if old:
oid, pre, vdata, p, tid = old
if vdata:
if vdata[0] != version:
raise POSException.VersionLockError(oid)
nv=vdata[1]
else:
nv=old
if serial != tid:
raise POSException.ConflictError(
oid=oid, serials=(tid, serial), data=data)
r = [oid, old, version and (version, nv) or None, data, self._tid]
self._tindex.append(r)
s=self._tsize
s=s+72+(data and (16+len(data)) or 4)
if version: s=s+32+len(version)
if self._quota is not None and s > self._quota:
raise POSException.StorageError(
'''<b>Quota Exceeded</b><br>
The maximum quota for this demonstration storage
has been exceeded.<br>Have a nice day.''')
finally: self._lock_release()
return self._tid
def supportsVersions(self):
return 1
def _clear_temp(self):
self._tindex = []
self._tsize = self._size + 160
def lastTransaction(self):
return self._ltid
def _begin(self, tid, u, d, e):
self._tsize = self._size + 120 + len(u) + len(d) + len(e)
def _finish(self, tid, user, desc, ext):
if not self._tindex:
# No data, so we don't update anything.
return
self._size = self._tsize
self._data[tid] = None, user, desc, ext, tuple(self._tindex)
for r in self._tindex:
oid, pre, vdata, p, tid = r
old = self._index.get(oid)
# If the object had version data, remove the version data.
if old is not None:
oldvdata = old[2]
if oldvdata:
v = self._vindex[oldvdata[0]]
del v[oid]
if not v:
# If the version info is now empty, remove it.
del self._vindex[oldvdata[0]]
self._index[oid] = r
# If there is version data, then udpate self._vindex, too.
if vdata:
version = vdata[0]
v = self._vindex.get(version)
if v is None:
v = self._vindex[version] = {}
v[oid] = r
self._ltid = self._tid
def undoLog(self, first, last, filter=None):
if last < 0: # abs(last) is an upper bound on the # to return
last = first - last
self._lock_acquire()
try:
transactions = self._data.items()
pos = len(transactions)
r = []
i = 0
while i < last and pos:
pos -= 1
tid, (p, u, d, e, t) = transactions[pos]
# Bug alert: why do we skip this if the transaction
# has been packed?
if p:
continue
d = {'id': base64.encodestring(tid)[:-1],
'time': TimeStamp(tid).timeTime(),
'user_name': u, 'description': d}
if e:
d.update(cPickle.loads(e))
if filter is None or filter(d):
if i >= first:
r.append(d)
i += 1
return r
finally:
self._lock_release()
def versionEmpty(self, version):
return not self._vindex.get(version, None)
def versions(self, max=None):
r = []
for v in self._vindex.keys():
if self.versionEmpty(v):
continue
r.append(v)
if max is not None and len(r) >= max:
break
return r
def _build_indexes(self, stop='\377\377\377\377\377\377\377\377'):
# Rebuild index structures from transaction data
index = {}
vindex = {}
for tid, (p, u, d, e, t) in self._data.items():
if tid >= stop:
break
for r in t:
oid, pre, vdata, p, tid = r
old=index.get(oid, None)
if old is not None:
oldvdata=old[2]
if oldvdata:
v=vindex[oldvdata[0]]
del v[oid]
if not v: del vindex[oldvdata[0]]
index[oid]=r
if vdata:
version=vdata[0]
v=vindex.get(version, None)
if v is None: v=vindex[version]={}
vindex[vdata[0]][oid]=r
return index, vindex
def pack(self, t, referencesf):
# Packing is hard, at least when undo is supported.
# Even for a simple storage like this one, packing
# is pretty complex.
self._lock_acquire()
try:
stop=`TimeStamp(*time.gmtime(t)[:5]+(t%60,))`
# Build indexes up to the pack time:
index, vindex = self._build_indexes(stop)
# TODO: This packing algorithm is flawed. It ignores
# references from non-current records after the pack
# time.
# Now build an index of *only* those objects reachable
# from the root.
rootl = [z64]
pindex = {}
while rootl:
oid = rootl.pop()
if oid in pindex:
continue
# Scan non-version pickle for references
r = index.get(oid, None)
if r is None:
if self._base:
p, s = self._base.load(oid, '')
referencesf(p, rootl)
else:
pindex[oid] = r
oid, pre, vdata, p, tid = r
referencesf(p, rootl)
if vdata:
nv = vdata[1]
if nv:
oid, pre, vdata, p, tid = nv
referencesf(p, rootl)
# Now we're ready to do the actual packing.
# We'll simply edit the transaction data in place.
# We'll defer deleting transactions till the end
# to avoid messing up the BTree items.
deleted = []
for tid, (p, u, d, e, records) in self._data.items():
if tid >= stop:
break
o = []
for r in records:
c = pindex.get(r[0])
if c is None:
# GC this record, no longer referenced
continue
if c == r:
# This is the most recent revision.
o.append(r)
else:
# This record is not the indexed record,
# so it may not be current. Let's see.
vdata = r[3]
if vdata:
# Version record are current *only* if they
# are indexed
continue
else:
# OK, this isn't a version record, so it may be the
# non-version record for the indexed record.
vdata = c[3]
if vdata:
if vdata[1] != r:
# This record is not the non-version
# record for the indexed record
continue
self.base.load(oid, '')
except ZODB.POSException.POSKeyError:
pass
else:
# The indexed record is not a version record,
# so this record can not be the non-version
# record for it.
continue
o.append(r)
if o:
if len(o) != len(records):
self._data[tid] = 1, u, d, e, tuple(o) # Reset data
else:
deleted.append(tid)
# Now delete empty transactions
for tid in deleted:
del self._data[tid]
# Now reset previous pointers for "current" records:
for r in pindex.values():
r[1] = None # Previous record
if r[2] and r[2][1]: # vdata
# If this record contains version data and
# non-version data, then clear it out.
r[2][1][2] = None
return oid
# Finally, rebuild indexes from transaction data:
self._index, self._vindex = self._build_indexes()
finally:
self._lock_release()
self.getSize()
def _splat(self):
"""Spit out a string showing state.
"""
o=[]
o.append('Transactions:')
for tid, (p, u, d, e, t) in self._data.items():
o.append(" %s %s" % (TimeStamp(tid), p))
for r in t:
oid, pre, vdata, p, tid = r
oid = oid_repr(oid)
tid = oid_repr(tid)
## if serial is not None: serial=str(TimeStamp(serial))
pre=id(pre)
if vdata and vdata[1]: vdata=vdata[0], id(vdata[1])
if p: p=''
o.append(' %s: %s' %
(id(r), `(oid, pre, vdata, p, tid)`))
o.append('\nIndex:')
items=self._index.items()
items.sort()
for oid, r in items:
if r: r=id(r)
o.append(' %s: %s' % (oid_repr(oid), r))
o.append('\nVersion Index:')
items=self._vindex.items()
items.sort()
for version, v in items:
o.append(' '+version)
vitems=v.items()
vitems.sort()
for oid, r in vitems:
if r: r=id(r)
o.append(' %s: %s' % (oid_repr(oid), r))
return '\n'.join(o)
def cleanup(self):
if self._base is not None:
self._base.cleanup()
def close(self):
if self._base is not None:
self._base.close()
def iterator(self, start=None, end=None):
# First iterate over the base storage
if self._base is not None:
for transaction in self._base.iterator(start, end):
yield transaction
# Then iterate over our local transactions
for tid, transaction in self._data.items():
if tid >= start and tid <= end:
yield TransactionRecord(tid, transaction)
def pack(self, t, referencesf, gc=False):
try:
self.changes.pack(t, referencesf, gc=False)
except TypeError, v:
if 'gc' in str(v):
pass # The gc arg isn't supported. Don't pack
raise
def store(self, oid, serial, data, version, transaction):
assert version=='', "versions aren't supported"
class TransactionRecord(ZODB.BaseStorage.TransactionRecord):
# See if we already have changes for this oid
try:
old = self.changes.load(oid, '')[1]
except ZODB.POSException.POSKeyError:
try:
old = self.base.load(oid, '')[1]
except ZODB.POSException.POSKeyError:
old = serial
def __init__(self, tid, transaction):
packed, user, description, extension, records = transaction
super(TransactionRecord, self).__init__(
tid, packed, user, description, extension)
self.records = transaction
if old != serial:
raise ZODB.POSException.ConflictError(
oid=oid, serials=(old, serial)) # XXX untested branch
def __iter__(self):
for record in self.records:
oid, prev, version, data, tid = record
yield ZODB.BaseStorage.DataRecord(oid, tid, data, version, prev)
return self.changes.store(oid, serial, data, '', transaction)
src/ZODB/DemoStorage.test 0 → 100644
View file @ 66cd2dca
DemoStorage demo (doctest)
--------------------------
Note that most people will configure the storage through ZConfig. If
you are one of those people, you may want to stop here. :) The
examples below show you how to use the storage from Python, but they
also exercise lots of details you might not be interested in.
To see how this works, we'll start by creating a base storage and
puting an object (in addition to the root object) in it:
>>> from ZODB.FileStorage import FileStorage
>>> base = FileStorage('base.fs')
>>> from ZODB.DB import DB
>>> db = DB(base)
>>> from persistent.mapping import PersistentMapping
>>> conn = db.open()
>>> conn.root()['1'] = PersistentMapping({'a': 1, 'b':2})
>>> import transaction
>>> transaction.commit()
>>> db.close()
>>> import os
>>> original_size = os.path.getsize('base.fs')
Now, lets reopen the base storage in read-only mode:
>>> base = FileStorage('base.fs', read_only=True)
And open a new storage to store changes:
>>> changes = FileStorage('changes.fs')
and combine the 2 in a demofilestorage:
>>> from ZODB.DemoStorage import DemoStorage
>>> storage = DemoStorage(base=base, changes=changes)
If there are no transactions, the storage reports the lastTransaction
of the base database:
>>> storage.lastTransaction() == base.lastTransaction()
True
Let's add some data:
>>> db = DB(storage)
>>> conn = db.open()
>>> items = conn.root()['1'].items()
>>> items.sort()
>>> items
[('a', 1), ('b', 2)]
>>> conn.root()['2'] = PersistentMapping({'a': 3, 'b':4})
>>> transaction.commit()
>>> conn.root()['2']['c'] = 5
>>> transaction.commit()
Here we can see that we haven't modified the base storage:
>>> original_size == os.path.getsize('base.fs')
True
But we have modified the changes database:
>>> len(changes)
2
Our lastTransaction reflects the lastTransaction of the changes:
>>> storage.lastTransaction() > base.lastTransaction()
True
>>> storage.lastTransaction() == changes.lastTransaction()
True
Let's walk over some of the methods so ewe can see how we delegate to
the new underlying storages:
>>> from ZODB.utils import p64, u64
>>> storage.load(p64(0), '') == changes.load(p64(0), '')
True
>>> storage.load(p64(0), '') == base.load(p64(0), '')
False
>>> storage.load(p64(1), '') == base.load(p64(1), '')
True
>>> serial = base.getTid(p64(0))
>>> storage.loadSerial(p64(0), serial) == base.loadSerial(p64(0), serial)
True
>>> serial = changes.getTid(p64(0))
>>> storage.loadSerial(p64(0), serial) == changes.loadSerial(p64(0),
... serial)
True
The object id of the new object is quite random, and typically large:
>>> print u64(conn.root()['2']._p_oid)
7106521602475165646
Let's look at some other methods:
>>> storage.getName()
"DemoStorage('base.fs', 'changes.fs')"
>>> storage.sortKey() == changes.sortKey()
True
>>> storage.getSize() == changes.getSize()
True
>>> len(storage) == len(changes)
True
Undo methods are simply copied from the changes storage:
>>> [getattr(storage, name) == getattr(changes, name)
... for name in ('supportsUndo', 'undo', 'undoLog', 'undoInfo')
... ]
[True, True, True, True]
src/ZODB/component.xml
View file @ 66cd2dca
......@@ -174,9 +174,9 @@
<sectiontype name="demostorage" datatype=".DemoStorage"
implements="ZODB.storage">
<key name="name" default="Demo Storage"/>
<section type="ZODB.storage" name="*" attribute="base"/>
<key name="quota" datatype="integer"/>
<key name="name" />
<section type="ZODB.storage" name="*" attribute="base" />
<section type="ZODB.storage" name="changes" attribute="changes" />
</sectiontype>
......
src/ZODB/config.py
View file @ 66cd2dca
......@@ -125,9 +125,11 @@ class DemoStorage(BaseConfig):
base = self.config.base.open()
else:
base = None
return DemoStorage(self.config.name,
base=base,
quota=self.config.quota)
if self.config.changes:
changes = self.config.changes.open()
else:
changes = None
return DemoStorage(self.config.name, base=base, changes=changes)
class FileStorage(BaseConfig):
......
src/ZODB/tests/testDemoStorage.py
View file @ 66cd2dca
......@@ -12,16 +12,34 @@
#
##############################################################################
import unittest
import random
import transaction
from ZODB.DB import DB
from zope.testing import doctest
import zope.testing.setupstack
import ZODB.utils
import ZODB.DemoStorage
from ZODB.tests import StorageTestBase, BasicStorage
from ZODB.tests import Synchronization
class DemoStorageTests(StorageTestBase.StorageTestBase,
from ZODB.tests import (
BasicStorage,
HistoryStorage,
IteratorStorage,
MTStorage,
PackableStorage,
RevisionStorage,
StorageTestBase,
Synchronization,
)
class DemoStorageTests(
StorageTestBase.StorageTestBase,
BasicStorage.BasicStorage,
HistoryStorage.HistoryStorage,
IteratorStorage.ExtendedIteratorStorage,
IteratorStorage.IteratorStorage,
MTStorage.MTStorage,
PackableStorage.PackableStorage,
RevisionStorage.RevisionStorage,
Synchronization.SynchronizedStorage,
):
......@@ -44,6 +62,25 @@ class DemoStorageTests(StorageTestBase.StorageTestBase,
self.assertEqual(s2.load(ZODB.utils.z64, ''),
self._storage.load(ZODB.utils.z64, ''))
def checkLengthAndBool(self):
self.assertEqual(len(self._storage), 0)
self.assert_(not self._storage)
db = DB(self._storage) # creates object 0. :)
self.assertEqual(len(self._storage), 1)
self.assert_(self._storage)
conn = db.open()
for i in range(10):
conn.root()[i] = conn.root().__class__()
transaction.commit()
self.assertEqual(len(self._storage), 11)
self.assert_(self._storage)
def checkLoadBeforeUndo(self):
pass # we don't support undo yet
checkUndoZombie = checkLoadBeforeUndo
def checkPackWithMultiDatabaseReferences(self):
pass # we never do gc
class DemoStorageWrappedBase(DemoStorageTests):
......@@ -59,29 +96,92 @@ class DemoStorageWrappedBase(DemoStorageTests):
def _makeBaseStorage(self):
raise NotImplementedError
class DemoStorageWrappedAroundFileStorage(DemoStorageWrappedBase):
class DemoStorageWrappedAroundMappingStorage(DemoStorageWrappedBase):
def _makeBaseStorage(self):
from ZODB.MappingStorage import MappingStorage
return MappingStorage()
class DemoStorageWrappedAroundMappingStorage(DemoStorageWrappedBase):
class DemoStorageWrappedAroundFileStorage(DemoStorageWrappedBase):
def _makeBaseStorage(self):
from ZODB.FileStorage import FileStorage
return FileStorage('FileStorageTests.fs')
def setUp(test):
random.seed(0)
zope.testing.setupstack.setUpDirectory(test)
zope.testing.setupstack.register(test, transaction.abort)
def testSomeDelegation():
r"""
>>> class S:
... def __init__(self, name):
... self.name = name
... def registerDB(self, db):
... print self.name, db
... def close(self):
... print self.name, 'closed'
... sortKey = getSize = __len__ = history = getTid = None
... tpc_finish = tpc_vote = tpc_transaction = None
... _lock_acquire = _lock_release = lambda: None
... getName = lambda self: 'S'
... isReadOnly = tpc_transaction = None
... supportsUndo = undo = undoLog = undoInfo = None
... supportsTransactionalUndo = None
... def new_oid(self):
... return '\0' * 8
... def tpc_begin(self, t, tid, status):
... print 'begin', tid, status
... def tpc_abort(self, t):
... pass
>>> from ZODB.DemoStorage import DemoStorage
>>> storage = DemoStorage(base=S(1), changes=S(2))
>>> storage.registerDB(1)
2 1
>>> storage.close()
1 closed
2 closed
>>> storage.tpc_begin(1, 2, 3)
begin 2 3
>>> storage.tpc_abort(1)
"""
def test_suite():
return unittest.TestSuite((
doctest.DocFileSuite('synchronized.txt'),
doctest.DocTestSuite(
setUp=setUp, tearDown=zope.testing.setupstack.tearDown,
),
doctest.DocFileSuite(
'README.txt',
setUp=setUp, tearDown=zope.testing.setupstack.tearDown,
),
))
def test_suite():
suite = unittest.TestSuite()
suite = unittest.TestSuite((
doctest.DocTestSuite(
setUp=setUp, tearDown=zope.testing.setupstack.tearDown,
),
doctest.DocFileSuite(
'../DemoStorage.test',
setUp=setUp, tearDown=zope.testing.setupstack.tearDown,
),
))
suite.addTest(unittest.makeSuite(DemoStorageTests, 'check'))
suite.addTest(unittest.makeSuite(DemoStorageWrappedAroundFileStorage,
'check'))
suite.addTest(unittest.makeSuite(DemoStorageWrappedAroundMappingStorage,
'check'))
return suite
if __name__ == "__main__":
loader = unittest.TestLoader()
loader.testMethodPrefix = "check"
unittest.main(testLoader=loader)
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