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-rw-r--r-- | src/buildstream/_scheduler/queues/cachequeryqueue.py | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/buildstream/_scheduler/queues/cachequeryqueue.py b/src/buildstream/_scheduler/queues/cachequeryqueue.py new file mode 100644 index 000000000..7ed7dcede --- /dev/null +++ b/src/buildstream/_scheduler/queues/cachequeryqueue.py @@ -0,0 +1,59 @@ +# +# Copyright (C) 2020 Bloomberg Finance LP +# +# 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/>. + +from . import Queue, QueueStatus +from ..resources import ResourceType +from ..jobs import JobStatus +from ...types import _KeyStrength + + +# A queue which queries the cache for artifacts and sources +# +class CacheQueryQueue(Queue): + + action_name = "Cache-query" + complete_name = "Cache queried" + resources = [ResourceType.CACHE] + + def get_process_func(self): + if self._query_artifacts: + return CacheQueryQueue._query_artifacts_or_sources + else: + return CacheQueryQueue._query_sources + + def status(self, element): + if not element._get_cache_key(strength=_KeyStrength.WEAK): + # Strict and weak cache keys are unavailable if the element or + # a dependency has an unresolved source + return QueueStatus.SKIP + + return QueueStatus.READY + + def done(self, _, element, result, status): + if status is JobStatus.FAIL: + return + + element._cache_query_done() + + @staticmethod + def _query_artifacts_or_sources(element): + element._query_cache() + if not element._can_query_cache() or not element._cached_success(): + element._query_source_cache() + + @staticmethod + def _query_sources(element): + element._query_source_cache() |