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-rw-r--r--src/lib/Bcfg2/Server/FileMonitor.py315
1 files changed, 0 insertions, 315 deletions
diff --git a/src/lib/Bcfg2/Server/FileMonitor.py b/src/lib/Bcfg2/Server/FileMonitor.py
deleted file mode 100644
index d6b313e6b..000000000
--- a/src/lib/Bcfg2/Server/FileMonitor.py
+++ /dev/null
@@ -1,315 +0,0 @@
-"""Bcfg2.Server.FileMonitor provides the support for monitorung files."""
-
-import logging
-import os
-import stat
-from time import sleep, time
-
-logger = logging.getLogger('Bcfg2.Server.FileMonitor')
-
-
-def ShouldIgnore(event):
- """Test if the event should be suppresed."""
- # FIXME should move event suppression out of the core
- if event.filename.split('/')[-1] == '.svn':
- return True
- if event.filename.endswith('~') or \
- event.filename.startswith('#') or event.filename.startswith('.#'):
- #logger.error("Suppressing event for file %s" % (event.filename))
- return True
- return False
-
-
-class Event(object):
- def __init__(self, request_id, filename, code):
- self.requestID = request_id
- self.filename = filename
- self.action = code
-
- def code2str(self):
- """return static code for event"""
- return self.action
-
-available = {}
-
-
-class FileMonitor(object):
- """File Monitor baseclass."""
- def __init__(self, debug=False):
- object.__init__(self)
- self.debug = debug
- self.handles = dict()
-
- def get_event(self):
- return None
-
- def pending(self):
- return False
-
- def fileno(self):
- return 0
-
- def handle_one_event(self, event):
- if ShouldIgnore(event):
- return
- if event.requestID not in self.handles:
- logger.info("Got event for unexpected id %s, file %s" %
- (event.requestID, event.filename))
- return
- if self.debug:
- logger.info("Dispatching event %s %s to obj %s" \
- % (event.code2str(), event.filename,
- self.handles[event.requestID]))
- try:
- self.handles[event.requestID].HandleEvent(event)
- except:
- logger.error("error in handling of gamin event for %s" % \
- (event.filename), exc_info=1)
-
- def handle_event_set(self, lock=None):
- count = 1
- event = self.get_event()
- start = time()
- if lock:
- lock.acquire()
- try:
- self.handle_one_event(event)
- while self.pending():
- self.handle_one_event(self.get_event())
- count += 1
- except:
- pass
- if lock:
- lock.release()
- end = time()
- logger.info("Handled %d events in %.03fs" % (count, (end - start)))
-
- def handle_events_in_interval(self, interval):
- end = time() + interval
- while time() < end:
- if self.pending():
- self.handle_event_set()
- end = time() + interval
- else:
- sleep(0.5)
-
-
-class FamFam(object):
- """The fam object is a set of callbacks for
- file alteration events (FAM support).
- """
-
- def __init__(self):
- object.__init__(self)
- self.fm = _fam.open()
- self.users = {}
- self.handles = {}
- self.debug = False
-
- def fileno(self):
- """Return fam file handle number."""
- return self.fm.fileno()
-
- def handle_event_set(self, _):
- self.Service()
-
- def handle_events_in_interval(self, interval):
- now = time()
- while (time() - now) < interval:
- if self.Service():
- now = time()
-
- def AddMonitor(self, path, obj):
- """Add a monitor to path, installing a callback to obj.HandleEvent."""
- mode = os.stat(path)[stat.ST_MODE]
- if stat.S_ISDIR(mode):
- handle = self.fm.monitorDirectory(path, None)
- else:
- handle = self.fm.monitorFile(path, None)
- self.handles[handle.requestID()] = handle
- if obj != None:
- self.users[handle.requestID()] = obj
- return handle.requestID()
-
- def Service(self, interval=0.50):
- """Handle all fam work."""
- count = 0
- collapsed = 0
- rawevents = []
- start = time()
- now = time()
- while (time() - now) < interval:
- if self.fm.pending():
- while self.fm.pending():
- count += 1
- rawevents.append(self.fm.nextEvent())
- now = time()
- unique = []
- bookkeeping = []
- for event in rawevents:
- if ShouldIgnore(event):
- continue
- if event.code2str() != 'changed':
- # process all non-change events
- unique.append(event)
- else:
- if (event.filename, event.requestID) not in bookkeeping:
- bookkeeping.append((event.filename, event.requestID))
- unique.append(event)
- else:
- collapsed += 1
- for event in unique:
- if event.requestID in self.users:
- try:
- self.users[event.requestID].HandleEvent(event)
- except:
- logger.error("handling event for file %s" % (event.filename), exc_info=1)
- end = time()
- logger.info("Processed %s fam events in %03.03f seconds. %s coalesced" %
- (count, (end - start), collapsed))
- return count
-
-
-class Fam(FileMonitor):
- """
- The fam object is a set of callbacks for
- file alteration events (FAM support).
- """
-
- def __init__(self, debug=False):
- FileMonitor.__init__(self, debug)
- self.fm = _fam.open()
-
- def fileno(self):
- return self.fm.fileno()
-
- def AddMonitor(self, path, obj):
- """Add a monitor to path, installing a callback to obj.HandleEvent."""
- mode = os.stat(path)[stat.ST_MODE]
- if stat.S_ISDIR(mode):
- handle = self.fm.monitorDirectory(path, None)
- else:
- handle = self.fm.monitorFile(path, None)
- if obj != None:
- self.handles[handle.requestID()] = obj
- return handle.requestID()
-
- def pending(self):
- return self.fm.pending()
-
- def get_event(self):
- return self.fm.nextEvent()
-
-
-class Pseudo(FileMonitor):
- """
- The fam object is a set of callbacks for
- file alteration events (static monitor support).
- """
-
- def __init__(self, debug=False):
- FileMonitor.__init__(self, debug=False)
- self.pending_events = []
-
- def pending(self):
- return len(self.pending_events) != 0
-
- def get_event(self):
- return self.pending_events.pop()
-
- def AddMonitor(self, path, obj):
- """add a monitor to path, installing a callback to obj.HandleEvent"""
- handleID = len(list(self.handles.keys()))
- mode = os.stat(path)[stat.ST_MODE]
- handle = Event(handleID, path, 'exists')
- if stat.S_ISDIR(mode):
- dirList = os.listdir(path)
- self.pending_events.append(handle)
- for includedFile in dirList:
- self.pending_events.append(Event(handleID,
- includedFile,
- 'exists'))
- self.pending_events.append(Event(handleID, path, 'endExist'))
- else:
- self.pending_events.append(Event(handleID, path, 'exists'))
- if obj != None:
- self.handles[handleID] = obj
- return handleID
-
-
-try:
- from gamin import WatchMonitor, GAMCreated, GAMExists, GAMEndExist, \
- GAMChanged, GAMDeleted, GAMMoved
-
- class GaminEvent(Event):
- """
- This class provides an event analogous to
- python-fam events based on gamin sources.
- """
- def __init__(self, request_id, filename, code):
- Event.__init__(self, request_id, filename, code)
- action_map = {GAMCreated: 'created', GAMExists: 'exists',
- GAMChanged: 'changed', GAMDeleted: 'deleted',
- GAMEndExist: 'endExist', GAMMoved: 'moved'}
- if code in action_map:
- self.action = action_map[code]
-
- class Gamin(FileMonitor):
- """
- The fam object is a set of callbacks for
- file alteration events (Gamin support)
- """
- def __init__(self, debug=False):
- FileMonitor.__init__(self, debug)
- self.mon = WatchMonitor()
- self.counter = 0
- self.events = []
-
- def fileno(self):
- return self.mon.get_fd()
-
- def queue(self, path, action, request_id):
- """queue up the event for later handling"""
- self.events.append(GaminEvent(request_id, path, action))
-
- def AddMonitor(self, path, obj):
- """Add a monitor to path, installing a callback to obj.HandleEvent."""
- handle = self.counter
- self.counter += 1
- mode = os.stat(path)[stat.ST_MODE]
-
- # Flush queued gamin events
- while self.mon.event_pending():
- self.mon.handle_one_event()
-
- if stat.S_ISDIR(mode):
- self.mon.watch_directory(path, self.queue, handle)
- else:
- self.mon.watch_file(path, self.queue, handle)
- self.handles[handle] = obj
- return handle
-
- def pending(self):
- return len(self.events) > 0 or self.mon.event_pending()
-
- def get_event(self):
- if self.mon.event_pending():
- self.mon.handle_one_event()
- return self.events.pop(0)
-
- available['gamin'] = Gamin
-except ImportError:
- # fall back to _fam
- pass
-
-try:
- import _fam
- available['fam'] = FamFam
-except ImportError:
- pass
-available['pseudo'] = Pseudo
-
-for fdrv in ['gamin', 'fam', 'pseudo']:
- if fdrv in available:
- available['default'] = available[fdrv]
- break
generated by cgit v1.2.3-1-g7c22 (git 2.25.1) at 2024-07-09 10:22:37 +0000