Modify action_factory to store actions in DB

* Action factory register actions in DB at starting
 * Added script tools/sync_db.sh for sync with db
   (Updates system actions, it is required before
   first Mistral launch)
 * Changed init Mistral in devstack: we must do
   sync_db before the launching.

 * Since we have to write all actions in DB, unit
   test are also modified:
    * Now in tearDown() we don't drop db at all,
      but just delete all things except Actions.
    * Created heavy_init() method as a replacement
      setUpClass(), see comments in tests/base.py
    * Register actions operation is too much expensive
      operation so we create db and init actions in
      heavy_init() method.

TODO:
 * Provide executor info to construct action class in
   runtime using action_factory
 * Modify/write an instruction 'How to start Mistral'

Change-Id: If4416c4da5c05189126c109aa613a0303c1b7ef0

contrib/devstack/lib/mistral

@@ -136,6 +136,7 @@ function configure_mistral {
 function init_mistral {
     # (re)create Mistral database
     recreate_database mistral utf8
+    python $MISTRAL_DIR/tools/sync_db.py --config-file $MISTRAL_CONF_FILE
 }
 
 

mistral/actions/action_factory.py

@@ -19,9 +19,12 @@ from stevedore import extension
 from mistral.actions import base
 from mistral.actions import generator_factory
 from mistral.actions import std_actions
+from mistral.db.v2 import api as db_api
 from mistral import exceptions as exc
 from mistral import expressions as expr
+from mistral.openstack.common import importutils
 from mistral.openstack.common import log as logging
+from mistral.utils import inspect_utils as i_utils
 from mistral.workbook import parser as spec_parser
 
 
@@ -31,6 +34,7 @@ _ACTION_CTX_PARAM = 'action_context'
 _NAMESPACES = {}
 
 
+# TODO(nmakhotkin): It's not used anywhere.
 def _find_or_create_namespace(name):
     ns = _NAMESPACES.get(name)
 
@@ -41,32 +45,68 @@ def _find_or_create_namespace(name):
     return ns
 
 
-def get_registered_namespaces():
-    return _NAMESPACES.copy()
+def get_registered_actions(**kwargs):
+    return db_api.get_actions(**kwargs)
+
+
+def _register_action_in_db(name, action_class, attributes,
+                           description=None):
+    values = {
+        'name': name,
+        'action_class': action_class,
+        'attributes': attributes,
+        'description': description,
+        'is_system': True
+    }
+
+    try:
+        LOG.debug("Registering action in DB: %s" % name)
+        db_api.create_action(values)
+    except exc.DBDuplicateEntry:
+        LOG.debug("Action %s already exists in DB." % name)
+
+
+def _clear_system_action_db():
+    db_api.delete_actions(is_system=True)
+
+
+def sync_db():
+    _clear_system_action_db()
+    register_action_classes()
 
 
 def _register_dynamic_action_classes():
     all_generators = generator_factory.all_generators()
     for generator in all_generators:
-        ns = _find_or_create_namespace(generator.action_namespace)
         action_classes = generator.create_action_classes()
+
+        module = generator.base_action_class.__module__
+        class_name = generator.base_action_class.__name__
+
+        action_class_str = "%s.%s" % (module, class_name)
         for action_name, action in action_classes.items():
-            ns.add(action_name, action)
+            attrs = i_utils.get_public_fields(action)
+            full_action_name = "%s.%s" % (generator.action_namespace,
+                                          action_name)
+
+            _register_action_in_db(full_action_name,
+                                   action_class_str,
+                                   attrs)
 
 
-def _register_action_classes():
+def register_action_classes():
     mgr = extension.ExtensionManager(
         namespace='mistral.actions',
         invoke_on_load=False)
 
-    for name in mgr.names():
-        ns = _find_or_create_namespace(name.split('.')[0])
-        ns.add(name.split('.')[1], mgr[name].plugin)
+    with db_api.transaction():
+        for name in mgr.names():
+            action_class_str = mgr[name].entry_point_target.replace(':', '.')
+            attrs = i_utils.get_public_fields(mgr[name].plugin)
 
-    for ns in _NAMESPACES:
-        _NAMESPACES[ns].log()
+            _register_action_in_db(name, action_class_str, attrs)
 
-    _register_dynamic_action_classes()
+        _register_dynamic_action_classes()
 
 
 def get_action_class(action_full_name):
@@ -75,18 +115,23 @@ def get_action_class(action_full_name):
     :param action_full_name: Full action name (that includes namespace).
     :return: Action class or None if not found.
     """
-    arr = action_full_name.split('.')
 
-    if len(arr) != 2:
+    # TODO(nmakhotkin) Validate action_name.
+    if action_full_name.find('.') == -1:
         raise exc.ActionException('Invalid action name: %s' %
                                   action_full_name)
-
-    ns = _NAMESPACES.get(arr[0])
-
-    if not ns:
+    # TODO(nmakhotkin) Temporary hack to return None if action not found
+    try:
+        action_db = db_api.get_action(action_full_name)
+    except exc.NotFoundException:
         return None
 
-    return ns.get_action_class(arr[1])
+    # Rebuild action class and restore attributes.
+    action_class = importutils.import_class(action_db.action_class)
+    for name, value in action_db.attributes.items():
+        setattr(action_class, name, value)
+
+    return action_class
 
 
 def _get_action_context(db_task, openstack_context):
@@ -220,6 +265,3 @@ def convert_adhoc_action_result(workbook, action_name, result):
 
     # Use base action result as a context for evaluating expressions.
     return expr.evaluate_recursively(transformer, result)
-
-# Registering actions on module load.
-_register_action_classes()

mistral/db/v1/api.py

@@ -99,6 +99,10 @@ def workbook_definition_put(workbook_name, text):
     return IMPL.workbook_update(workbook_name, {'definition': text})
 
 
+def workbooks_delete(**kwargs):
+    return IMPL.workbooks_delete(**kwargs)
+
+
 # Executions
 
 
@@ -126,6 +130,10 @@ def executions_get(**kwargs):
     return IMPL.executions_get(**kwargs)
 
 
+def executions_delete(**kwargs):
+    return IMPL.executions_delete(**kwargs)
+
+
 # Tasks
 
 def task_get(id):
@@ -144,6 +152,10 @@ def task_delete(id):
     return IMPL.task_delete(id)
 
 
+def tasks_delete(**kwargs):
+    return IMPL.tasks_delete(**kwargs)
+
+
 def tasks_get(**kwargs):
     return IMPL.tasks_get(**kwargs)
 
@@ -189,3 +201,7 @@ def trigger_update(trigger_id, values):
 
 def get_next_triggers(time):
     return IMPL.get_next_triggers(time)
+
+
+def triggers_delete(**kwargs):
+    return IMPL.triggers_delete(**kwargs)

mistral/db/v1/sqlalchemy/api.py

@@ -88,6 +88,11 @@ def transaction():
         end_tx()
 
 
+def _delete_all(model, session=None, **kwargs):
+    query = b.model_query(model)
+    query.filter_by(**kwargs).delete()
+
+
 # Triggers.
 
 @b.session_aware()
@@ -157,6 +162,11 @@ def triggers_get_all(**kwargs):
     return _triggers_get_all(**kwargs)
 
 
+@b.session_aware()
+def triggers_delete(**kwargs):
+    return _delete_all(models.Trigger, **kwargs)
+
+
 # Workbooks.
 
 @b.session_aware()
@@ -230,6 +240,11 @@ def _workbook_get(workbook_name, session=None):
                                project_id=context.ctx().project_id).first()
 
 
+@b.session_aware()
+def workbooks_delete(**kwargs):
+    return _delete_all(models.Workbook, **kwargs)
+
+
 # Workflow executions.
 
 
@@ -270,6 +285,11 @@ def execution_delete(execution_id, session=None):
     session.delete(execution)
 
 
+@b.session_aware()
+def executions_delete(**kwargs):
+    return _delete_all(models.WorkflowExecution, **kwargs)
+
+
 def execution_get(execution_id):
     execution = _execution_get(execution_id)
 
@@ -339,6 +359,11 @@ def task_delete(task_id, session=None):
     session.delete(task)
 
 
+@b.session_aware()
+def tasks_delete(**kwargs):
+    return _delete_all(models.Task, **kwargs)
+
+
 def task_get(task_id):
     task = _task_get(task_id)
     if not task:

mistral/db/v2/api.py

@@ -92,6 +92,9 @@ def delete_workbook(name):
     IMPL.delete_workbook(name)
 
 
+def delete_workbooks(**kwargs):
+    IMPL.delete_workbooks(**kwargs)
+
 # Workflows.
 
 
@@ -124,6 +127,10 @@ def delete_workflow(name):
     IMPL.delete_workflow(name)
 
 
+def delete_workflows(**kwargs):
+    IMPL.delete_workflows(**kwargs)
+
+
 # Executions.
 
 def get_execution(id):
@@ -159,6 +166,10 @@ def delete_execution(id):
     return IMPL.delete_execution(id)
 
 
+def delete_executions(**kwargs):
+    IMPL.delete_executions(**kwargs)
+
+
 # Tasks.
 
 def get_task(id):
@@ -190,6 +201,10 @@ def delete_task(id):
     return IMPL.delete_task(id)
 
 
+def delete_tasks(**kwargs):
+    return IMPL.delete_tasks(**kwargs)
+
+
 # Delayed calls.
 
 
@@ -203,3 +218,29 @@ def delete_delayed_call(id):
 
 def get_delayed_calls_to_start(time):
     return IMPL.get_delayed_calls_to_start(time)
+
+# Actions.
+
+
+def get_action(name):
+    return IMPL.get_action(name)
+
+
+def get_actions(**kwargs):
+    return IMPL.get_actions(**kwargs)
+
+
+def create_action(values):
+    return IMPL.create_action(values)
+
+
+def update_action(name, values):
+    return IMPL.update_action(name, values)
+
+
+def delete_action(name):
+    return IMPL.delete_action(name)
+
+
+def delete_actions(**kwargs):
+    return IMPL.delete_actions(**kwargs)

mistral/db/v2/sqlalchemy/api.py

@@ -88,6 +88,11 @@ def transaction():
         end_tx()
 
 
+def _delete_all(model, session=None, **kwargs):
+    query = b.model_query(model).filter_by(**kwargs)
+    query.delete()
+
+
 # Workbooks.
 
 def get_workbook(name):
@@ -175,6 +180,11 @@ def _get_workbook(name):
                            project_id=context.ctx().project_id).first()
 
 
+@b.session_aware()
+def delete_workbooks(**kwargs):
+    return _delete_all(models.Workbook, **kwargs)
+
+
 # Workflows.
 
 def get_workflow(name):
@@ -246,6 +256,11 @@ def delete_workflow(name, session=None):
     session.delete(wf)
 
 
+@b.session_aware()
+def delete_workflows(**kwargs):
+    return _delete_all(models.Workflow, **kwargs)
+
+
 def _get_workflows(**kwargs):
     query = b.model_query(models.Workflow)
 
@@ -339,6 +354,12 @@ def delete_execution(id, session=None):
     session.delete(execution)
 
 
+@b.session_aware()
+def delete_executions(**kwargs):
+    _delete_all(models.Task)
+    return _delete_all(models.Execution, **kwargs)
+
+
 def _get_executions(**kwargs):
     query = b.model_query(models.Execution)
 
@@ -420,6 +441,11 @@ def delete_task(id, session=None):
     session.delete(task)
 
 
+@b.session_aware()
+def delete_tasks(**kwargs):
+    return _delete_all(models.Task, **kwargs)
+
+
 def _get_task(id):
     query = b.model_query(models.Task)
 
@@ -472,3 +498,75 @@ def _get_delayed_call(delayed_call_id, session=None):
     query = b.model_query(models.DelayedCall)
 
     return query.filter_by(id=delayed_call_id).first()
+
+# Actions.
+
+
+def get_action(name):
+    action = _get_action(name)
+
+    if not action:
+        raise exc.NotFoundException(
+            "Action not found [action_name=%s]" % name)
+
+    return action
+
+
+def get_actions(**kwargs):
+    return _get_actions(**kwargs)
+
+
+@b.session_aware()
+def create_action(values, session=None):
+    action = models.Action()
+
+    action.update(values)
+
+    try:
+        action.save(session=session)
+    except db_exc.DBDuplicateEntry as e:
+        raise exc.DBDuplicateEntry("Duplicate entry for action %s: %s"
+                                   % (action.name, e.columns))
+
+    return action
+
+
+@b.session_aware()
+def delete_actions(**kwargs):
+    return _delete_all(models.Action, **kwargs)
+
+
+@b.session_aware()
+def update_action(name, values, session=None):
+    action = _get_action(name)
+
+    if not action:
+        raise exc.NotFoundException(
+            "Action not found [action_name=%s]" % name)
+
+    action.update(values.copy())
+
+    return action
+
+
+@b.session_aware()
+def delete_action(name, session=None):
+    action = _get_action(name)
+
+    if not action:
+        raise exc.NotFoundException(
+            "Action not found [action_name=%s]" % name)
+
+    session.delete(action)
+
+
+def _get_action(name):
+    query = b.model_query(models.Action)
+
+    return query.filter_by(name=name).first()
+
+
+def _get_actions(**kwargs):
+    query = b.model_query(models.Action)
+
+    return query.filter_by(**kwargs).all()

mistral/db/v2/sqlalchemy/models.py

@@ -127,3 +127,23 @@ class DelayedCall(mb.MistralModelBase):
     method_arguments = sa.Column(st.JsonDictType())
     auth_context = sa.Column(st.JsonDictType())
     execution_time = sa.Column(sa.DateTime, nullable=False)
+
+
+class Action(mb.MistralModelBase):
+    """Contains info about registered Actions."""
+
+    __tablename__ = 'actions_v2'
+
+    __table_args__ = (
+        sa.UniqueConstraint('name'),
+    )
+
+    # Main properties.
+    id = mb.id_column()
+    name = sa.Column(sa.String(200))
+    description = sa.Column(sa.Text())
+
+    # Service properties.
+    action_class = sa.Column(sa.String(200))
+    attributes = sa.Column(st.JsonDictType())
+    is_system = sa.Column(sa.Boolean())

mistral/tests/base.py

@@ -2,7 +2,7 @@
 #
 # Copyright 2013 - Mirantis, Inc.
 #
-#    Licensed under the Apache License, Version 2.0 (the "License");
+# 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
 #
@@ -16,6 +16,7 @@
 
 import pkg_resources as pkg
 import sys
+import time
 
 from oslo.config import cfg
 from oslo import messaging
@@ -24,8 +25,7 @@ from oslotest import base
 from stevedore import driver
 import testtools.matchers as ttm
 
-import time
-
+from mistral.actions import action_factory
 from mistral import context as auth_context
 from mistral.db.sqlalchemy import base as db_sa_base
 from mistral.db.v1 import api as db_api_v1
@@ -169,14 +169,50 @@ class BaseTest(base.BaseTestCase):
 
 
 class DbTestCase(BaseTest):
-    def setUp(self):
-        super(DbTestCase, self).setUp()
+    is_heavy_init_called = False
 
+    @classmethod
+    def __heavy_init(cls):
+        """Make this method private to prevent extending this one.
+        It runs heavy_init() only once.
+
+        Note: setUpClass() can be used, but it magically is not invoked
+        from child class in another module.
+        """
+        if not cls.is_heavy_init_called:
+            cls.heavy_init()
+            cls.is_heavy_init_called = True
+
+    @classmethod
+    def heavy_init(cls):
+        """Runs a long initialization (runs once by class)
+        and can be extended by child classes.
+        """
         cfg.CONF.set_default('connection', 'sqlite://', group='database')
         db_api_v1.setup_db()
         db_api_v2.setup_db()
+        action_factory.sync_db()
 
-        self.addCleanup(db_api_v1.drop_db)
+    def _clean_db(self):
+        with db_api_v1.transaction():
+            db_api_v1.workbooks_delete()
+            db_api_v1.executions_delete()
+            db_api_v1.triggers_delete()
+            db_api_v1.tasks_delete()
+
+        with db_api_v2.transaction():
+            db_api_v2.delete_workbooks()
+            db_api_v2.delete_executions()
+            db_api_v2.delete_workflows()
+            db_api_v2.delete_tasks()
+
+    def setUp(self):
+        super(DbTestCase, self).setUp()
+
+        self.__heavy_init()
+        cfg.CONF.set_default('connection', 'sqlite://', group='database')
+        db_api_v1.setup_db()
+        db_api_v2.setup_db()
 
         self.ctx = auth_context.MistralContext(user_id='1-2-3-4',
                                                project_id='5-6-7-8',
@@ -184,7 +220,9 @@ class DbTestCase(BaseTest):
                                                project_name='test-project',
                                                is_admin=False)
         auth_context.set_ctx(self.ctx)
+
         self.addCleanup(auth_context.set_ctx, None)
+        self.addCleanup(self._clean_db)
 
     def is_db_session_open(self):
         return db_sa_base._get_thread_local_session() is not None

mistral/tests/unit/actions/test_action_factory.py

@@ -89,53 +89,36 @@ DB_TASK_ADHOC = {
 }
 
 
-class ActionFactoryTest(base.BaseTest):
+class ActionFactoryTest(base.DbTestCase):
     def test_register_standard_actions(self):
-        namespaces = a_f.get_registered_namespaces()
+        action_list = a_f.get_registered_actions()
 
-        self.assertIn("nova", namespaces)
-        self.assertIn("glance", namespaces)
-        self.assertIn("keystone", namespaces)
-        self.assertIn("std", namespaces)
+        self._assert_single_item(action_list, name="std.echo")
+        self._assert_single_item(action_list, name="std.email")
+        self._assert_single_item(action_list, name="std.http")
+        self._assert_single_item(action_list, name="std.mistral_http")
+        self._assert_single_item(action_list, name="std.ssh")
 
-        std_ns = namespaces["std"]
-        nova_ns = namespaces["nova"]
-        keystone_ns = namespaces["keystone"]
-        glance_ns = namespaces["glance"]
+        self._assert_single_item(action_list, name="nova.servers_get")
+        self._assert_single_item(action_list, name="nova.volumes_delete")
 
-        self.assertEqual(5, len(std_ns))
+        self._assert_single_item(action_list, name="keystone.users_list")
+        self._assert_single_item(action_list, name="keystone.trusts_create")
 
-        self.assertTrue(nova_ns.contains_action_name("servers_get"))
-        self.assertTrue(nova_ns.contains_action_name("volumes_delete"))
-
-        self.assertTrue(keystone_ns.contains_action_name("users_list"))
-        self.assertTrue(keystone_ns.contains_action_name("trusts_create"))
-
-        self.assertTrue(glance_ns.contains_action_name("images_list"))
-        self.assertTrue(glance_ns.contains_action_name("images_delete"))
-
-        self.assertTrue(std_ns.contains_action_name("echo"))
-        self.assertTrue(std_ns.contains_action_name("http"))
-        self.assertTrue(std_ns.contains_action_name("mistral_http"))
-        self.assertTrue(std_ns.contains_action_name("email"))
-
-        self.assertEqual(std.EchoAction, std_ns.get_action_class("echo"))
-        self.assertEqual(std.HTTPAction, std_ns.get_action_class("http"))
-        self.assertEqual(std.MistralHTTPAction,
-                         std_ns.get_action_class("mistral_http"))
-        self.assertEqual(std.SendEmailAction,
-                         std_ns.get_action_class("email"))
+        self._assert_single_item(action_list, name="glance.images_list")
+        self._assert_single_item(action_list, name="glance.images_delete")
 
     def test_get_action_class(self):
         self.assertEqual(std.EchoAction, a_f.get_action_class("std.echo"))
         self.assertEqual(std.HTTPAction, a_f.get_action_class("std.http"))
+        self.assertEqual(std.MistralHTTPAction,
+                         a_f.get_action_class("std.mistral_http"))
         self.assertEqual(std.SendEmailAction,
                          a_f.get_action_class("std.email"))
 
     def test_get_action_class_failure(self):
-        exc = self.assertRaises(exceptions.ActionException,
-                                a_f.get_action_class, 'echo')
-        self.assertIn('Invalid action name', exc.message)
+        self.assertRaises(exceptions.ActionException,
+                          a_f.get_action_class, 'echo')
 
     def test_create_http_action(self):
         db_task = models.Task()

mistral/tests/unit/engine/default/test_executor.py

@@ -111,6 +111,8 @@ class TestExecutor(base.DbTestCase):
         self.execution = db_api.execution_create(
             SAMPLE_EXECUTION['workbook_name'], SAMPLE_EXECUTION)
 
+        self.addCleanup(db_api.execution_delete, SAMPLE_EXECUTION['id'])
+
         # Create a new task.
         SAMPLE_TASK['execution_id'] = self.execution['id']
         self.task = db_api.task_create(

mistral/tests/unit/engine1/test_default_engine.py

@@ -57,8 +57,11 @@ class DefaultEngineTest(base.DbTestCase):
     def setUp(self):
         super(DefaultEngineTest, self).setUp()
 
+        self.wb_name = self.getUniqueString("wb")
+
         wb_service.create_workbook_v2({
-            'name': 'my_wb',
+            'name': self.wb_name,
+            'description': 'Simple workbook for testing engine.',
             'definition': WORKBOOK,
             'tags': ['test']
         })
@@ -75,7 +78,7 @@ class DefaultEngineTest(base.DbTestCase):
 
         # Start workflow.
         exec_db = self.engine.start_workflow(
-            'my_wb.wf1',
+            '%s.wf1' % self.wb_name,
             wf_input,
             task_name='task2'
         )
@@ -110,7 +113,7 @@ class DefaultEngineTest(base.DbTestCase):
 
         # Start workflow.
         exec_db = self.engine.start_workflow(
-            'my_wb.wf1',
+            '%s.wf1' % self.wb_name,
             wf_input,
             task_name='task2'
         )

mistral/utils/inspect_utils.py

@@ -0,0 +1,34 @@
+# Copyright 2014 - Mirantis, Inc.
+#
+#    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.
+
+import inspect
+
+
+def get_public_fields(obj):
+    """Returns only public fields from object or class."""
+
+    public_attributes = [attr for attr in dir(obj)
+                         if not attr.startswith("_")]
+
+    public_fields = {}
+    for attribute_str in public_attributes:
+        attr = getattr(obj, attribute_str)
+        is_field = not (inspect.isbuiltin(attr)
+                        or inspect.isfunction(attr)
+                        or inspect.ismethod(attr))
+
+        if is_field:
+            public_fields[attribute_str] = attr
+
+    return public_fields

tools/sync_db.py

@@ -0,0 +1,37 @@
+# Copyright 2014 - Mirantis, Inc.
+#
+#    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.
+
+from oslo.config import cfg
+
+from mistral.actions import action_factory
+from mistral.db.v2 import api as db_api
+from mistral import config
+from mistral.openstack.common import log as logging
+
+
+CONF = cfg.CONF
+LOG = logging.getLogger(__name__)
+
+
+def main():
+    config.parse_args()
+    logging.setup('Mistral')
+
+    db_api.setup_db()
+
+    action_factory.sync_db()
+
+
+if __name__ == '__main__':
+    main()

tools/sync_db.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+tox -evenv -- python tools/sync_db.py "$@"