--- /dev/null
+# -*- coding: utf-8 -*-
+
+###########################################################################
+# SeriesFinale
+# Copyright (C) 2009 Joaquim Rocha <jrocha@igalia.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+###########################################################################
+
+from threading import Thread
+import Queue
+import gobject
+import logging
+logging.basicConfig(level=logging.DEBUG)
+
+class AsyncItem(object):
+
+ def __init__(self, target_method, target_method_args, finish_callback=None, finish_callback_args=()):
+ self.target_method = target_method
+ self.target_method_args = target_method_args
+ self.finish_callback = finish_callback
+ self.finish_callback_args = finish_callback_args
+ self.canceled = False
+
+ def run(self):
+ if self.canceled:
+ return
+ results = error = None
+ try:
+ results = self.target_method(*self.target_method_args)
+ except Exception, exception:
+ logging.debug(str(exception))
+ error = exception
+ if self.canceled or not self.finish_callback:
+ return
+ self.finish_callback_args += (results,)
+ self.finish_callback_args += (error,)
+ gobject.idle_add(self.finish_callback, *self.finish_callback_args)
+
+ def cancel(self):
+ self.canceled = True
+
+class AsyncWorker(Thread):
+
+ def __init__(self):
+ Thread.__init__(self)
+ self.queue = Queue.Queue(0)
+ self.stopped = False
+ self.async_item = None
+ self.item_number = -1
+
+ def run(self):
+ while not self.stopped:
+ if self.queue.empty():
+ self.stop()
+ break
+ try:
+ self.async_item = self.queue.get()
+ self.item_number += 1
+ self.async_item.run()
+ self.queue.task_done()
+ self.async_item = None
+ except Exception, exception:
+ logging.debug(str(exception))
+ self.stop()
+
+ def stop(self):
+ self.stopped = True
+ if self.async_item:
+ self.async_item.cancel()
+