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