def listen(self):
#runs task given, with the yield required to get returned value
#equivalent of callback/wait pairing from tornado.gen
yield tornado.gen.Task(self.redis.subscribe, self.channel)
if not self.redis.subscribed:
self.write_message('ERROR IN SUBSCRIPTION')
#listen from tornadoredis makes the listen object asynchronous
#if using standard redis lib, it blocks while listening
self.redis.listen(self.callback)
# Try and fight race condition by loading from redis after listen
# started need to use std redis lib because tornadoredis is in
# subscribed state
oldmessages = r_server.lrange(self.channel + ':messages', 0, -1)
if oldmessages is not None:
for message in oldmessages:
self.write_message(message)
"""
# Update analysis to done in analysis table
SQL = """UPDATE qiita_analysis SET analysis_done = true WHERE
analysis_id = %s"""
try:
pgcursor = postgres.cursor()
pgcursor.execute(SQL, (analysis_id,))
postgres.commit()
pgcursor.close()
except PostgresError, e:
pgcursor.close()
postgres.rollback()
raise RuntimeError("Can't finish off analysis: %s" % e)
# Wipe out all messages from redis list so no longer pushed to user
for message in r_server.lrange(user + ':messages', 0, -1):
if analysis_name in str(message):
r_server.lrem(user + ':messages', message)
# Finally, push finished state
push_notification(user, analysis_name, 'done', 'allcomplete')
###################################
# Analysis functions #
# ------------------ #
# These dummy functions will be #
# removed once we can call the #
# real QIIME functions #
###################################