annotate hgext/remotefilelog/connectionpool.py @ 50895:a834ec41f17c

remotefilelog: use sysstr to check for attribute presence We do not need bytes here.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Wed, 30 Aug 2023 13:07:00 +0200
parents 642e31cb55f0
children d718eddf01d9
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1 # connectionpool.py - class for pooling peer connections for reuse
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2 #
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3 # Copyright 2017 Facebook, Inc.
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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8
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9 from mercurial import (
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10 hg,
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11 sshpeer,
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12 util,
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13 )
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14
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15 _sshv1peer = sshpeer.sshv1peer
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16
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18 class connectionpool:
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19 def __init__(self, repo):
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20 self._repo = repo
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21 self._pool = dict()
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22
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23 def get(self, path):
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24 pathpool = self._pool.get(path)
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25 if pathpool is None:
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26 pathpool = list()
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27 self._pool[path] = pathpool
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28
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29 conn = None
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30 if len(pathpool) > 0:
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31 try:
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32 conn = pathpool.pop()
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33 peer = conn.peer
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34 # If the connection has died, drop it
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35 if isinstance(peer, _sshv1peer):
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36 if peer._subprocess.poll() is not None:
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37 conn = None
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38 except IndexError:
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39 pass
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40
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41 if conn is None:
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42
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43 peer = hg.peer(self._repo.ui, {}, path)
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44 if util.safehasattr(peer, '_cleanup'):
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45
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46 class mypeer(peer.__class__):
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47 def _cleanup(self, warn=None):
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48 # close pipee first so peer.cleanup reading it won't
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49 # deadlock, if there are other processes with pipeo
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50 # open (i.e. us).
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51 if util.safehasattr(self, 'pipee'):
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52 self.pipee.close()
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53 return super(mypeer, self)._cleanup()
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54
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55 peer.__class__ = mypeer
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56
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57 conn = connection(pathpool, peer)
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58
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59 return conn
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60
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61 def close(self):
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62 for pathpool in self._pool.values():
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63 for conn in pathpool:
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64 conn.close()
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65 del pathpool[:]
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68 class connection:
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69 def __init__(self, pool, peer):
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70 self._pool = pool
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71 self.peer = peer
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72
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73 def __enter__(self):
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74 return self
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75
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76 def __exit__(self, type, value, traceback):
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77 # Only add the connection back to the pool if there was no exception,
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78 # since an exception could mean the connection is not in a reusable
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79 # state.
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80 if type is None:
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81 self._pool.append(self)
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82 else:
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83 self.close()
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84
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85 def close(self):
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86 if util.safehasattr(self.peer, 'cleanup'):
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87 self.peer.cleanup()