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114 lines
3.7 KiB
Python
114 lines
3.7 KiB
Python
# This file is part of Indico.
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# Copyright (C) 2002 - 2017 European Organization for Nuclear Research (CERN).
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#
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# Indico is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# Indico is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Indico; if not, see <http://www.gnu.org/licenses/>.
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from __future__ import unicode_literals
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from flask_pluginengine import depends, trim_docstring
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from indico.core.plugins import IndicoPlugin, PluginCategory
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from indico.util.date_time import now_utc
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from indico.util.decorators import classproperty
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from indico_livesync.forms import AgentForm
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from indico_livesync.models.queue import LiveSyncQueueEntry
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from indico_livesync.plugin import LiveSyncPlugin
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@depends('livesync')
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class LiveSyncPluginBase(IndicoPlugin): # pragma: no cover
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"""Base class for livesync plugins"""
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#: dict containing the backend(s) provided by the plugin; the keys are unique identifiers
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backend_classes = None
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category = PluginCategory.synchronization
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def init(self):
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super(LiveSyncPluginBase, self).init()
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for name, backend_class in self.backend_classes.iteritems():
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assert backend_class.plugin is None
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backend_class.plugin = type(self)
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LiveSyncPlugin.instance.register_backend_class(name, backend_class)
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class LiveSyncBackendBase(object):
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"""Base class for livesync backends"""
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#: the plugin containing the agent
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plugin = None # set automatically when the agent is registered
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#: the Uploader to use. only needed if run and run_initial_export are not overridden
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uploader = None
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#: the form used when creating/editing the agent
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form = AgentForm
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@classproperty
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@classmethod
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def title(cls):
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parts = trim_docstring(cls.__doc__).split('\n', 1)
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return parts[0].strip()
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@classproperty
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@classmethod
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def description(cls):
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parts = trim_docstring(cls.__doc__).split('\n', 1)
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try:
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return parts[1].strip()
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except IndexError:
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return 'no description available'
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def __init__(self, agent):
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"""
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:param agent: a `LiveSyncAgent` instance
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"""
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self.agent = agent
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def fetch_records(self, count=None):
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query = (self.agent.queue
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.filter_by(processed=False)
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.order_by(LiveSyncQueueEntry.timestamp)
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.limit(count))
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return query.all()
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def update_last_run(self):
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"""Updates the last run timestamp.
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Don't forget to call this if you implement your own `run` method!
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"""
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self.agent.last_run = now_utc()
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def run(self):
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"""Runs the livesync export"""
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if self.uploader is None: # pragma: no cover
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raise NotImplementedError
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records = self.fetch_records()
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uploader = self.uploader(self)
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LiveSyncPlugin.logger.info('Uploading %d records', len(records))
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uploader.run(records)
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self.update_last_run()
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def run_initial_export(self, events):
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"""Runs the initial export.
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This process is expected to take a very long time.
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:param events: iterable of all events in this indico instance
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"""
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if self.uploader is None: # pragma: no cover
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raise NotImplementedError
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uploader = self.uploader(self)
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uploader.run_initial(events)
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