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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Base class for task executors.
"""
from aria import logger
from aria.orchestrator import events
class BaseExecutor(logger.LoggerMixin):
"""
Base class for task executors.
"""
def _execute(self, ctx):
raise NotImplementedError
def execute(self, ctx):
"""
Executes a task.
:param task: task to execute
"""
if ctx.task.function:
self._execute(ctx)
else:
# In this case the task is missing a function. This task still gets to an
# executor, but since there is nothing to run, we by default simply skip the
# execution itself.
self._task_started(ctx)
self._task_succeeded(ctx)
def close(self):
"""
Closes the executor.
"""
pass
def terminate(self, task_id):
"""
Terminate the executing task
:return:
"""
pass
@staticmethod
def _task_started(ctx):
events.start_task_signal.send(ctx)
@staticmethod
def _task_failed(ctx, exception, traceback=None):
events.on_failure_task_signal.send(ctx, exception=exception, traceback=traceback)
@staticmethod
def _task_succeeded(ctx):
events.on_success_task_signal.send(ctx)
class StubTaskExecutor(BaseExecutor): # pylint: disable=abstract-method
def execute(self, ctx, *args, **kwargs):
with ctx.persist_changes:
ctx.task.status = ctx.task.SUCCESS
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