Add type to tasks API

In order for a user to know if the task execution is
of type workflow execution or action execution,
the type should be returned in the API

Partially implements: blueprint mistral-task-subexecutions-endpoint

Change-Id: I9ff474797df0f9cbbddfeda3292d582dfeb2b702

mistral/api/controllers/v2/resources.py

@@ -276,6 +276,7 @@ class Task(resource.Resource):
 
     id = wtypes.text
     name = wtypes.text
+    type = wtypes.text
 
     workflow_name = wtypes.text
     workflow_id = wtypes.text

mistral/db/sqlalchemy/migration/alembic_migrations/versions/020_add_type_to_task_execution.py

@@ -0,0 +1,37 @@
+# Copyright 2016 OpenStack Foundation.
+#
+# Licensed 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.
+
+"""add type to task execution
+
+Revision ID: 020
+Revises: 019
+Create Date: 2016-10-05 13:24:52.911011
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '020'
+down_revision = '019'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+
+    op.add_column(
+        'task_executions_v2',
+        sa.Column('type', sa.String(length=10), nullable=True)
+    )

mistral/db/v2/sqlalchemy/models.py

@@ -233,6 +233,7 @@ class TaskExecution(Execution):
     # Main properties.
     action_spec = sa.Column(st.JsonLongDictType())
     unique_key = sa.Column(sa.String(250), nullable=True)
+    type = sa.Column(sa.String(10))
 
     # Whether the task is fully processed (publishing and calculating commands
     # after it). It allows to simplify workflow controller implementations

mistral/engine/tasks.py

@@ -207,6 +207,7 @@ class Task(object):
     def _create_task_execution(self, state=states.RUNNING, state_info=None):
         task_id = utils.generate_unicode_uuid()
         task_name = self.task_spec.get_name()
+        task_type = self.task_spec.get_type()
 
         data_flow.add_current_task_to_context(self.ctx, task_id, task_name)
 
@@ -223,7 +224,8 @@ class Task(object):
             'in_context': self.ctx,
             'published': {},
             'runtime_context': {},
-            'project_id': self.wf_ex.project_id
+            'project_id': self.wf_ex.project_id,
+            'type': task_type
         }
 
         self.task_ex = db_api.create_task_execution(values)

mistral/tests/resources/wb_with_nested_wf.yaml

@@ -0,0 +1,18 @@
+---
+version: "2.0"
+
+name: wb_with_nested_wf
+
+workflows:
+
+  wrapping_wf:
+    type: direct
+    tasks:
+      call_inner_wf:
+        workflow: inner_wf
+
+  inner_wf:
+    type: direct
+    tasks:
+      hello:
+        action: std.echo output="Hello from inner workflow"

mistral/workbook/v2/tasks.py

@@ -36,6 +36,9 @@ RESERVED_TASK_NAMES = [
     'pause'
 ]
 
+ACTION_TASK_TYPE = 'ACTION'
+WORKFLOW_TASK_TYPE = 'WORKFLOW'
+
 
 class TaskSpec(base.BaseSpec):
     # See http://json-schema.org
@@ -186,9 +189,6 @@ class TaskSpec(base.BaseSpec):
     def get_description(self):
         return self._description
 
-    def get_type(self):
-        return self._type
-
     def get_action_name(self):
         return self._action if self._action else None
 
@@ -216,6 +216,11 @@ class TaskSpec(base.BaseSpec):
     def get_safe_rerun(self):
         return self._safe_rerun
 
+    def get_type(self):
+        if self._workflow:
+            return WORKFLOW_TASK_TYPE
+        return ACTION_TASK_TYPE
+
 
 class DirectWorkflowTaskSpec(TaskSpec):
     _polymorphic_value = 'direct'

mistral_tempest_tests/tests/api/v2/test_tasks.py

@@ -59,3 +59,39 @@ class TasksTestsV2(base.TestCase):
         self.assertEqual(
             self.direct_wf_name, body['tasks'][-1]['workflow_name']
         )
+
+
+class TaskTypesTestsV2(base.TestCase):
+
+    _service = 'workflowv2'
+
+    def setUp(self):
+        super(TaskTypesTestsV2, self).setUp()
+
+        self.useFixture(lockutils.LockFixture('mistral-workflow'))
+
+        _, wb_body = self.client.create_workbook('wb_with_nested_wf.yaml')
+        self.nested_wf_name = 'wb_with_nested_wf.wrapping_wf'
+        _, execution = self.client.create_execution(self.nested_wf_name)
+
+    @test.attr(type='sanity')
+    def test_task_type(self):
+        resp, body = self.client.get_list_obj('tasks')
+
+        self.assertEqual(200, resp.status)
+
+        bt = body['tasks']
+        ll = [[v for k, v in d.iteritems() if 'type' in k] for d in bt]
+        types_list = [item for sublist in ll for item in sublist]
+
+        self.assertIn(
+            'WORKFLOW', types_list
+        )
+        self.assertIn(
+            'ACTION', types_list
+        )
+
+        # there are 2 tasks in the workflow one of each type
+        self.assertEqual(
+            2, len(types_list)
+        )