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Factor out prefetching

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This commit is contained in:
Markus Unterwaditzer 2014-06-18 16:10:25 +02:00
parent 80f8301f71
commit 7ad89d439b
1 changed files with 16 additions and 7 deletions
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23
vdirsyncer/sync.py
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@ -64,13 +64,22 @@ def prepare_list(storage, href_to_status):
else:
download.append(href)
if download:
for href, item, etag in storage.get_multi(download):
props = rv[href]
props['item'] = item
props['ident'] = item.ident
if props['etag'] != etag:
raise SyncError('Etag changed during sync.')
prefetch(storage, rv, download)
return rv
def prefetch(storage, rv, hrefs):
if rv is None:
rv = {}
if not hrefs:
return rv
for href, item, etag in storage.get_multi(hrefs):
props = rv.setdefault(href, {'etag': etag})
props['item'] = item
props['ident'] = item.ident
if props['etag'] != etag:
raise SyncError('Etag changed during sync.')
return rv