/
multicommitadapter.py
65 lines (48 loc) · 1.73 KB
/
multicommitadapter.py
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"""Adapt non-IMultiCommitStorage storages to IMultiCommitStorage
"""
import zope.interface
from .interfaces import IMultiCommitStorage
from .ConflictResolution import ResolvedSerial
@zope.interface.implementer(IMultiCommitStorage)
class MultiCommitAdapter:
def __init__(self, storage):
self._storage = storage
ifaces = zope.interface.providedBy(storage)
assert IMultiCommitStorage not in ifaces
zope.interface.alsoProvides(self, ifaces)
self._resolved = set()
def __getattr__(self, name):
v = getattr(self._storage, name)
self.__dict__[name] = v
return v
def tpc_begin(self, *args):
self._storage.tpc_begin(*args)
self._resolved = set()
def store(self, oid, *args):
if self._storage.store(oid, *args) == ResolvedSerial:
self._resolved.add(oid)
def storeBlob(self, oid, *args):
s = self._storage.storeBlob(oid, *args)
if s:
if isinstance(s, bytes):
s = ((oid, s), )
for oid, serial in s:
if s == ResolvedSerial:
self._resolved.add(oid)
def undo(self, transaction_id, transaction):
r = self._storage.undo(transaction_id, transaction)
if r:
self._resolved.update(set(r[1]))
def tpc_vote(self, *args):
s = self._storage.tpc_vote(*args)
for (oid, serial) in (s or ()):
if serial == ResolvedSerial:
self._resolved.add(oid)
return list(self._resolved)
def tpc_finish(self, transaction, f=lambda tid: None):
t = []
def func(tid):
t.append(tid)
f(tid)
self._storage.tpc_finish(transaction, func)
return t[0]