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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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47 lines
1.2 KiB
47 lines
1.2 KiB
10 years ago
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"""Helper to watch a (set) of directories for modifications."""
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import os
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import threading
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import time
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class DirWatcher(object):
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"""Helper to watch a (set) of directories for modifications."""
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def __init__(self, paths):
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if isinstance(paths, basestring):
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paths = [paths]
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self._mu = threading.Lock()
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self._done = False
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self.paths = list(paths)
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self.lastrun = time.time()
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self._cache = self._calculate()
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def _calculate(self):
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"""Walk over all subscribed paths, check most recent mtime."""
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most_recent_change = None
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for path in self.paths:
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if not os.path.exists(path):
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continue
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if not os.path.isdir(path):
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continue
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for root, _, files in os.walk(path):
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for f in files:
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st = os.stat(os.path.join(root, f))
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if most_recent_change is None:
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most_recent_change = st.st_mtime
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else:
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most_recent_change = max(most_recent_change, st.st_mtime)
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return most_recent_change
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def most_recent_change(self):
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self._mu.acquire()
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try:
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if time.time() - self.lastrun > 1:
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self._cache = self._calculate()
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self.lastrun = time.time()
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return self._cache
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finally:
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self._mu.release()
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