+++ /dev/null
-# Background fetcher:
-# Takes a generator and a notification identifier as parameter,
-# starts a thread, and post a notification whenever data arrives.
-# Posts a completion notification when done.
-# Terminates if generator fails or encounters an error.
-
-import threading
-from postoffice import postoffice
-import jamaendo
-import logging
-
-import gobject
-import gtk
-import hildon
-
-log = logging.getLogger(__name__)
-
-class _Worker(threading.Thread):
- def __init__(self, generator, owner):
- threading.Thread.__init__(self)
- self.setDaemon(True)
- self.generator = generator
- self.owner = owner
-
- def _post(self, item):
- def idle_fetch(owner, item):
- postoffice.notify("fetch", owner, item)
- gobject.idle_add(idle_fetch, self.owner, item)
-
- def _post_ok(self):
- def idle_fetch_ok(owner):
- postoffice.notify("fetch-ok", owner)
- gobject.idle_add(idle_fetch_ok, self.owner)
-
- def _post_fail(self, e):
- def idle_fetch_fail(owner, e):
- postoffice.notify("fetch-fail", owner, e)
- gobject.idle_add(idle_fetch_fail, self.owner, e)
-
- def run(self):
- try:
- for item in self.generator():
- self._post(item)
- self._post_ok()
- except jamaendo.JamendoAPIException, e:
- log.exception("Failed to fetch, id %s" % (self.owner))
- self._post_fail(e)
-
-class Fetcher(object):
- def __init__(self, generator, owner, on_item = None, on_ok = None, on_fail = None):
- self.generator = generator
- self.owner = owner
- self.worker = None
-
- self.on_item = on_item
- self.on_ok = on_ok
- self.on_fail = on_fail
-
- def _on_item_cb(self, i, x):
- self.on_item(i, x)
-
- def _on_ok_cb(self, i):
- self.on_ok(i)
- if isinstance(self.owner, gtk.Window):
- hildon.hildon_gtk_window_set_progress_indicator(self.owner, 0)
-
- def _on_fail_cb(self, i, e):
- self.on_fail(i, e)
- if isinstance(self.owner, gtk.Window):
- hildon.hildon_gtk_window_set_progress_indicator(self.owner, 0)
-
- def start(self):
- postoffice.connect('fetch', self, self._on_item_cb)
- postoffice.connect('fetch-ok', self, self._on_ok_cb)
- postoffice.connect('fetch-fail', self, self._on_fail_cb)
- if isinstance(self.owner, gtk.Window):
- hildon.hildon_gtk_window_set_progress_indicator(self.owner, 1)
- self.worker = _Worker(self.generator, self.owner)
- self.worker.start()
-
- def stop(self):
- postoffice.disconnect(['fetch', 'fetch-ok', 'fetch-fail'], self)