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take global lock while doing imports

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sqlcoder
2009-07-18 23:01:18 +01:00
parent 6a69bf512e
commit 3352f608cf
2 changed files with 70 additions and 54 deletions
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pyfpdb/GuiAutoImport.py
+30 -23
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@@ -154,31 +154,40 @@ class GuiAutoImport (threading.Thread):
# results to the same pipe. This means that self.path should be a a list of dirs
# to watch.
if widget.get_active(): # toggled on
self.doAutoImportBool = True
widget.set_label(u' _Stop Autoimport ')
if self.pipe_to_hud is None:
if os.name == 'nt':
command = "python HUD_main.py" + " " + self.settings['cl_options']
bs = 0 # windows is not happy with line buffing here
self.pipe_to_hud = subprocess.Popen(command, bufsize = bs, stdin = subprocess.PIPE,
universal_newlines=True)
else:
command = os.path.join(sys.path[0], 'HUD_main.py')
cl = [command, ] + string.split(self.settings['cl_options'])
self.pipe_to_hud = subprocess.Popen(cl, bufsize = 1, stdin = subprocess.PIPE,
universal_newlines=True)
# - Does the lock acquisition need to be more sophisticated for multiple dirs?
# (see comment above about what to do if pipe already open)
# - Ideally we want to release the lock if the auto-import is killed by some
# kind of exception - is this possible?
if self.settings['global_lock'].acquire(False): # returns false immediately if lock not acquired
print "\nGlobal lock taken ..."
self.doAutoImportBool = True
widget.set_label(u' _Stop Autoimport ')
if self.pipe_to_hud is None:
if os.name == 'nt':
command = "python HUD_main.py" + " " + self.settings['cl_options']
bs = 0 # windows is not happy with line buffing here
self.pipe_to_hud = subprocess.Popen(command, bufsize = bs, stdin = subprocess.PIPE,
universal_newlines=True)
else:
command = os.path.join(sys.path[0], 'HUD_main.py')
cl = [command, ] + string.split(self.settings['cl_options'])
self.pipe_to_hud = subprocess.Popen(cl, bufsize = 1, stdin = subprocess.PIPE,
universal_newlines=True)
# Add directories to importer object.
for site in self.input_settings:
self.importer.addImportDirectory(self.input_settings[site][0], True, site, self.input_settings[site][1])
print "Adding import directories - Site: " + site + " dir: "+ str(self.input_settings[site][0])
self.do_import()
# Add directories to importer object.
for site in self.input_settings:
self.importer.addImportDirectory(self.input_settings[site][0], True, site, self.input_settings[site][1])
print "Adding import directories - Site: " + site + " dir: "+ str(self.input_settings[site][0])
self.do_import()
interval=int(self.intervalEntry.get_text())
gobject.timeout_add(interval*1000, self.do_import)
interval=int(self.intervalEntry.get_text())
gobject.timeout_add(interval*1000, self.do_import)
else:
print "auto-import aborted - global lock not available"
else: # toggled off
self.settings['global_lock'].release()
self.doAutoImportBool = False # do_import will return this and stop the gobject callback timer
print "Stopping autoimport"
print "Stopping autoimport - global lock released."
if self.pipe_to_hud.poll() is not None:
print "HUD already terminated"
else:
@@ -186,8 +195,6 @@ class GuiAutoImport (threading.Thread):
self.pipe_to_hud.communicate('\n') # waits for process to terminate
self.pipe_to_hud = None
self.startButton.set_label(u' _Start Autoimport ')
#end def GuiAutoImport.startClicked