mirror of
https://github.com/tahoe-lafs/tahoe-lafs.git
synced 2024-12-30 17:56:58 +00:00
36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
from twisted.internet import defer
|
|
|
|
# utility wrapper for DeferredList
|
|
def _check_deferred_list(results):
|
|
# if any of the component Deferreds failed, return the first failure such
|
|
# that an addErrback() would fire. If all were ok, return a list of the
|
|
# results (without the success/failure booleans)
|
|
for success,f in results:
|
|
if not success:
|
|
return f
|
|
return [r[1] for r in results]
|
|
def DeferredListShouldSucceed(dl):
|
|
d = defer.DeferredList(dl)
|
|
d.addCallback(_check_deferred_list)
|
|
return d
|
|
|
|
def _parseDListResult(l):
|
|
return [x[1] for x in l]
|
|
|
|
def _unwrapFirstError(f):
|
|
f.trap(defer.FirstError)
|
|
raise f.value.subFailure
|
|
|
|
def gatherResults(deferredList):
|
|
"""Returns list with result of given Deferreds.
|
|
|
|
This builds on C{DeferredList} but is useful since you don't
|
|
need to parse the result for success/failure.
|
|
|
|
@type deferredList: C{list} of L{Deferred}s
|
|
"""
|
|
d = defer.DeferredList(deferredList, fireOnOneErrback=True, consumeErrors=True)
|
|
d.addCallbacks(_parseDListResult, _unwrapFirstError)
|
|
return d
|
|
|