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fix hash_download_cache startup bug

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This commit is contained in:
Kevin Lynx 2013-07-21 21:29:47 +08:00
parent dcf0181839
commit 108a1bfd1b
1 changed files with 6 additions and 2 deletions
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6
src/hash_reader/hash_download_cache.erl
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@ -94,8 +94,12 @@ do_save(DBPool, Docs) ->
try_load(DBPool, []) ->
?T("download_cache empty, load hash from db"),
Conn = mongo_pool:get(DBPool),
{Doc} = hash_reader_common:load_delete_doc(Conn, ?HASH_DOWNLOAD_COLL),
case hash_reader_common:load_delete_doc(Conn, ?HASH_DOWNLOAD_COLL) of
{Doc} ->
{Doc, []};
{} ->
{{}, []}
end;
try_load(_, [First|Rest]) ->
{First, Rest}.