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#
# Copyright (C) 2016 Codethink Limited
#
# This program 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 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, see <http://www.gnu.org/licenses/>.
#
# Authors:
# Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
# Jürg Billeter <juerg.billeter@codethink.co.uk>
from ..._exceptions import SkipJob
from ..jobs import JobStatus
from ..resources import ResourceType
# Local imports
from . import Queue, QueueStatus
# A queue which pulls element artifacts
#
class PullQueue(Queue):
action_name = "Pull"
complete_name = "Artifacts Pulled"
resources = [ResourceType.DOWNLOAD, ResourceType.CACHE]
def get_process_func(self):
return PullQueue._pull_or_skip
def status(self, element):
if not element._can_query_cache():
return QueueStatus.PENDING
if element._pull_pending():
return QueueStatus.READY
else:
return QueueStatus.SKIP
def done(self, _, element, result, status):
if status is JobStatus.FAIL:
return
element._pull_done()
def register_pending_element(self, element):
# Set a "can_query_cache"_callback for an element which is not
# immediately ready to query the artifact cache so that it
# may be pulled.
element._set_can_query_cache_callback(self._enqueue_element)
@staticmethod
def _pull_or_skip(element):
if not element._pull():
raise SkipJob(PullQueue.action_name)
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