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|
#
# alertmanager.py
#
# Copyright (C) 2007-2009 Andrew Resch <andrewresch@gmail.com>
#
# Deluge is free software.
#
# You may 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.
#
# deluge 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 deluge. If not, write to:
# The Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor
# Boston, MA 02110-1301, USA.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the OpenSSL
# library.
# You must obey the GNU General Public License in all respects for all of
# the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the file(s),
# but you are not obligated to do so. If you do not wish to do so, delete
# this exception statement from your version. If you delete this exception
# statement from all source files in the program, then also delete it here.
#
"""
The AlertManager handles all the libtorrent alerts.
This should typically only be used by the Core. Plugins should utilize the
`:mod:EventManager` for similar functionality.
"""
import logging
from twisted.internet import reactor
import deluge.component as component
from deluge._libtorrent import lt
from deluge.common import decode_string
log = logging.getLogger(__name__)
class AlertManager(component.Component):
def __init__(self):
log.debug("AlertManager initialized..")
component.Component.__init__(self, "AlertManager", interval=0.05)
self.session = component.get("Core").session
self.session.set_alert_mask(
lt.alert.category_t.error_notification |
lt.alert.category_t.port_mapping_notification |
lt.alert.category_t.storage_notification |
lt.alert.category_t.tracker_notification |
lt.alert.category_t.status_notification |
lt.alert.category_t.ip_block_notification |
lt.alert.category_t.performance_warning)
# handlers is a dictionary of lists {"alert_type": [handler1,h2,..]}
self.handlers = {}
self.delayed_calls = []
def update(self):
self.delayed_calls = [dc for dc in self.delayed_calls if dc.active()]
self.handle_alerts()
def stop(self):
for dc in self.delayed_calls:
if dc.active():
dc.cancel()
self.delayed_calls = []
def register_handler(self, alert_type, handler):
"""
Registers a function that will be called when 'alert_type' is pop'd
in handle_alerts. The handler function should look like: handler(alert)
Where 'alert' is the actual alert object from libtorrent.
:param alert_type: str, this is string representation of the alert name
:param handler: func(alert), the function to be called when the alert is raised
"""
if alert_type not in self.handlers:
# There is no entry for this alert type yet, so lets make it with an
# empty list.
self.handlers[alert_type] = []
# Append the handler to the list in the handlers dictionary
self.handlers[alert_type].append(handler)
log.debug("Registered handler for alert %s", alert_type)
def deregister_handler(self, handler):
"""
De-registers the `:param:handler` function from all alert types.
:param handler: func, the handler function to deregister
"""
# Iterate through all handlers and remove 'handler' where found
for (key, value) in self.handlers.items():
if handler in value:
# Handler is in this alert type list
value.remove(handler)
def handle_alerts(self, wait=False):
"""
Pops all libtorrent alerts in the session queue and handles them
appropriately.
:param wait: bool, if True then the handler functions will be run right
away and waited to return before processing the next alert
"""
alert = self.session.pop_alert()
# Loop through all alerts in the queue
while alert is not None:
alert_type = type(alert).__name__
# Display the alert message
log.debug("%s: %s", alert_type, decode_string(alert.message()))
# Call any handlers for this alert type
if alert_type in self.handlers:
for handler in self.handlers[alert_type]:
if not wait:
self.delayed_calls.append(reactor.callLater(0, handler, alert))
else:
handler(alert)
alert = self.session.pop_alert()
|
Deluge
