38b9ebc5fd
Noticed that Semigroup instance of Map is not suitable to use
for MapLog. For example, it behaved like this:
ghci> parseTrustLog "foo 1 timestamp=10\nfoo 2 timestamp=11" <> parseTrustLog "foo X timestamp=12"
fromList [(UUID "foo",LogEntry {changed = VectorClock 11s, value = SemiTrusted})]
Which was wrong, it lost the newer DeadTrusted value.
Luckily, nothing used that Semigroup when operating on a MapLog. And this
provides a safe instance.
Sponsored-by: Graham Spencer on Patreon
57 lines
1.6 KiB
Haskell
57 lines
1.6 KiB
Haskell
{- Chunk logs.
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-
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- An object can be stored in chunked for on a remote; these logs keep
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- track of the chunk size used, and the number of chunks.
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-
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- It's possible for a single object to be stored multiple times on the
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- same remote using different chunk sizes. So, while this is a MapLog, it
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- is not a normal UUIDBased log. Instead, it's a map from UUID and chunk
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- size to number of chunks.
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-
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- Format: "timestamp uuid:chunksize chunkcount"
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-
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- Copyright 2014 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Logs.Chunk (
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ChunkMethod(..),
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ChunkSize,
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ChunkCount,
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chunksStored,
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chunksRemoved,
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getCurrentChunks,
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) where
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import Annex.Common
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import Logs
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import Logs.MapLog
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import qualified Annex.Branch
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import Logs.Chunk.Pure
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import qualified Annex
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import qualified Data.Map as M
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chunksStored :: UUID -> Key -> ChunkMethod -> ChunkCount -> Annex ()
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chunksStored u k chunkmethod chunkcount = do
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c <- currentVectorClock
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config <- Annex.getGitConfig
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Annex.Branch.change
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(Annex.Branch.RegardingUUID [u])
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(chunkLogFile config k)
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(buildLog . changeMapLog c (u, chunkmethod) chunkcount . parseLog)
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chunksRemoved :: UUID -> Key -> ChunkMethod -> Annex ()
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chunksRemoved u k chunkmethod = chunksStored u k chunkmethod 0
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getCurrentChunks :: UUID -> Key -> Annex [(ChunkMethod, ChunkCount)]
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getCurrentChunks u k = do
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config <- Annex.getGitConfig
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select . parseLog <$> Annex.Branch.get (chunkLogFile config k)
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where
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select = filter (\(_m, ct) -> ct > 0)
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. map (\((_ku, m), l) -> (m, value l))
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. M.toList
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. M.filterWithKey (\(ku, _m) _ -> ku == u)
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. fromMapLog
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