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Joey Hess 2012-07-26 21:51:47 -04:00
parent f5ef46d01e
commit 77c3bf7f88
1 changed files with 14 additions and 11 deletions
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Assistant.hs
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@ -10,7 +10,7 @@
- The initial thread run, double forks to background, starts other - The initial thread run, double forks to background, starts other
- threads, and then stops, waiting for them to terminate, - threads, and then stops, waiting for them to terminate,
- or for a ctrl-c. - or for a ctrl-c.
- Thread 2: watcher - Thread 2: Watcher
- Notices new files, and calls handlers for events, queuing changes. - Notices new files, and calls handlers for events, queuing changes.
- Thread 3: inotify internal - Thread 3: inotify internal
- Used by haskell inotify library to ensure inotify event buffer is - Used by haskell inotify library to ensure inotify event buffer is
@ -19,43 +19,46 @@
- Scans the tree and registers inotify watches for each directory. - Scans the tree and registers inotify watches for each directory.
- A MVar lock is used to prevent other inotify handlers from running - A MVar lock is used to prevent other inotify handlers from running
- until this is complete. - until this is complete.
- Thread 5: committer - Thread 5: Committer
- Waits for changes to occur, and runs the git queue to update its - Waits for changes to occur, and runs the git queue to update its
- index, then commits. Also queues Transfer events to send added - index, then commits. Also queues Transfer events to send added
- files to other remotes. - files to other remotes.
- Thread 6: pusher - Thread 6: Pusher
- Waits for commits to be made, and pushes updated branches to remotes, - Waits for commits to be made, and pushes updated branches to remotes,
- in parallel. (Forks a process for each git push.) - in parallel. (Forks a process for each git push.)
- Thread 7: push retryer - Thread 7: PushRetryer
- Runs every 30 minutes when there are failed pushes, and retries - Runs every 30 minutes when there are failed pushes, and retries
- them. - them.
- Thread 8: merger - Thread 8: Merger
- Waits for pushes to be received from remotes, and merges the - Waits for pushes to be received from remotes, and merges the
- updated branches into the current branch. - updated branches into the current branch.
- (This uses inotify on .git/refs/heads, so there are additional - (This uses inotify on .git/refs/heads, so there are additional
- inotify threads associated with it, too.) - inotify threads associated with it, too.)
- Thread 9: transfer watcher - Thread 9: TransferWatcher
- Watches for transfer information files being created and removed, - Watches for transfer information files being created and removed,
- and maintains the DaemonStatus currentTransfers map. - and maintains the DaemonStatus currentTransfers map.
- (This uses inotify on .git/annex/transfer/, so there are - (This uses inotify on .git/annex/transfer/, so there are
- additional inotify threads associated with it, too.) - additional inotify threads associated with it, too.)
- Thread 10: transferrer - Thread 10: Transferrer
- Waits for Transfers to be queued and does them. - Waits for Transfers to be queued and does them.
- Thread 11: status logger - Thread 11: StatusLogger
- Wakes up periodically and records the daemon's status to disk. - Wakes up periodically and records the daemon's status to disk.
- Thread 12: sanity checker - Thread 12: SanityChecker
- Wakes up periodically (rarely) and does sanity checks. - Wakes up periodically (rarely) and does sanity checks.
- Thread 13: mount watcher - Thread 13: MountWatcher
- Either uses dbus to watch for drive mount events, or, when - Either uses dbus to watch for drive mount events, or, when
- there's no dbus, polls to find newly mounted filesystems. - there's no dbus, polls to find newly mounted filesystems.
- Once a filesystem that contains a remote is mounted, updates - Once a filesystem that contains a remote is mounted, updates
- state about that remote, pulls from it, and queues a push to it, - state about that remote, pulls from it, and queues a push to it,
- as well as an update, and queues it onto the - as well as an update, and queues it onto the
- ConnectedRemoteChan - ConnectedRemoteChan
- Thread 14: transfer scanner - Thread 14: TransferScanner
- Does potentially expensive checks to find data that needs to be - Does potentially expensive checks to find data that needs to be
- transferred from or to remotes, and queues Transfers. - transferred from or to remotes, and queues Transfers.
- Uses the ScanRemotes map. - Uses the ScanRemotes map.
- Thread 15: WebApp
- Spawns more threads as necessary to handle clients.
- Displays the DaemonStatus.
- -
- ThreadState: (MVar) - ThreadState: (MVar)
- The Annex state is stored here, which allows resuscitating the - The Annex state is stored here, which allows resuscitating the