Re: [Kimchi-devel] [PATCH] [Wok] Implement Asynchronous Notifications backend

* There is no POST method: a notification is added through add_notification() method. * Notifications are always stored in Wok object store under 'notification' type, even if added by a plugin. * Every time Wok is started, all notifications are erased, since this is a UI feature, intended to be showed to the user asynchronously, independent of which tab is opened. Signed-off-by: Lucio Correia <luciojhc(a)linux.vnet.ibm.com&gt; --- docs/API/notifications.md | 33 ++++++++++++++++++++++++++++ src/wok/control/notifications.py | 39 +++++++++++++++++++++++++++++++++ src/wok/i18n.py | 2 ++ src/wok/model/notifications.py | 47 ++++++++++++++++++++++++++++++++++++++++ src/wok/objectstore.py | 20 +++++++++++++++++ src/wok/server.py | 4 ++++ 6 files changed, 145 insertions(+) create mode 100644 docs/API/notifications.md create mode 100644 src/wok/control/notifications.py create mode 100644 src/wok/model/notifications.py IMPORTANT: This patch depends on WokMessage patch. diff --git a/docs/API/notifications.md b/docs/API/notifications.md new file mode 100644 index 0000000..fb0e691 --- /dev/null +++ b/docs/API/notifications.md @@ -0,0 +1,33 @@ +## REST API Specification for Notifications + +### Collection: Notifications + +**URI:** /notifications + +**Methods:** + +* **GET**: Retrieve a summarized list of current Notifications + +#### Examples +GET /notifications +[{Notification1}, {Notification2}, ...] + +### Resource: Notification + +**URI:** /notifications/*:id* + +A task represents an asynchronous operation that is being performed by the +server. + +**Methods:** + +* **GET**: Retrieve the full description of the Notification + * code: message ID + * message: message text already translated + +#### Examples +GET /notifications/KCHLIBVIRT0001W +{ + id: "KCHLIBVIRT0001W", + message: "KCHLIBVIRT0001W: Lack of storage space in guest vm-1", +} diff --git a/src/wok/control/notifications.py b/src/wok/control/notifications.py new file mode 100644 index 0000000..4e6d8d9 --- /dev/null +++ b/src/wok/control/notifications.py @@ -0,0 +1,39 @@ +# +# Project Wok +# +# Copyright IBM Corp, 2016 +# +# Code derived from Project Kimchi

+# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library 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 +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +from wok.control.base import Collection, Resource +from wok.control.utils import UrlSubNode + + +@UrlSubNode('notifications', True) +class Notifications(Collection): + def __init__(self, model): + super(Notifications, self).__init__(model) + self.resource = Notification + + +class Notification(Resource): + def __init__(self, model, id): + super(Notification, self).__init__(model, id) + + @property + def data(self): + return self.info diff --git a/src/wok/i18n.py b/src/wok/i18n.py index e6087f4..1bc92e3 100644 --- a/src/wok/i18n.py +++ b/src/wok/i18n.py @@ -45,6 +45,8 @@ messages = { "WOKLOG0001E": _("Invalid filter parameter. Filter parameters allowed: %(filters)s"), "WOKLOG0002E": _("Creation of log file failed: %(err)s"), + "WOKNOT0001E": _("Unable to find notification %(id)s"), + "WOKOBJST0001E": _("Unable to find %(item)s in datastore"), "WOKUTILS0001E": _("Unable to reach %(url)s. Make sure it is accessible and try again."), diff --git a/src/wok/model/notifications.py b/src/wok/model/notifications.py new file mode 100644 index 0000000..7158571 --- /dev/null +++ b/src/wok/model/notifications.py @@ -0,0 +1,47 @@ +# +# Project Wok +# +# Copyright IBM Corp, 2016 +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library 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 +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +from wok.exception import NotFoundError +from wok.message import WokMessage + + +class NotificationsModel(object): + def __init__(self, **kargs): + self.objstore = kargs['objstore'] + + def get_list(self): + with self.objstore as session: + return session.get_list('notification') + + +class NotificationModel(object): + def __init__(self, **kargs): + self.objstore = kargs['objstore'] + + def lookup(self, id): + with self.objstore as session: + notification = session.get('notification', str(id)) + + # use WokMessage to translate the notification + if notification: + plugin = notification.pop('_plugin_name', None) + message = WokMessage(id, notification, plugin).get_text() + return {"code": id, "message": message} + + raise NotFoundError("WOKNOT0001E", {'id': str(id)}) diff --git a/src/wok/objectstore.py b/src/wok/objectstore.py index 59354f3..2bae30b 100644 --- a/src/wok/objectstore.py +++ b/src/wok/objectstore.py @@ -144,3 +144,23 @@ class ObjectStore(object): # exception again wok_log.error(traceback.format_exc()) return False + + +def add_notification(code="", args={}, plugin_name=None): + try: + args.update({"_plugin_name": plugin_name}) + + with ObjectStore() as session: + session.store('notification', code, args)

+ except Exception as e: + wok_log.error("Unable to generate notification: %s" % e.message) + + +def clean_notifications(): + try: + with ObjectStore() as session: + notifications = session.get_list('notification') + for item in notifications: + session.delete('notification', item) + except Exception as e: + wok_log.error("Unable to clean notifications: %s" % e.message) diff --git a/src/wok/server.py b/src/wok/server.py index 902d4bf..a329ed4 100644 --- a/src/wok/server.py +++ b/src/wok/server.py @@ -33,6 +33,7 @@ from wok.config import config as configParser from wok.config import paths, PluginConfig, WokConfig from wok.control import sub_nodes from wok.model import model +from wok.objectstore import clean_notifications from wok.proxy import start_proxy, terminate_proxy from wok.reqlogger import RequestLogger from wok.root import WokRoot @@ -106,6 +107,9 @@ class Server(object): if dev_env: cherrypy.log.screen = True + # clean object store notifications + clean_notifications() + # close standard file handlers because we are going to use a # watchedfiled handler, otherwise we will have two file handlers # pointing to the same file, duplicating log enries