1 files changed, 75 insertions, 0 deletions
diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/orchestrator/workflows/executor/base.py b/azure/aria/aria-extension-cloudify/src/aria/aria/orchestrator/workflows/executor/base.py
new file mode 100644
index 0000000..e7d03ea
--- /dev/null
+++ b/azure/aria/aria-extension-cloudify/src/aria/aria/orchestrator/workflows/executor/base.py
@@ -0,0 +1,75 @@
+# 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