Renaming 'parameters' to 'input' everywhere

* 'parameters' was not consistent with 'output' for actions
  and workflows.

Change-Id: I74cbf7db37b0908225b97a60433b7da8c3c69b05

mistral/api/controllers/v2/task.py

@@ -45,7 +45,7 @@ class Task(resource.Resource):
     state = wtypes.text
     result = wtypes.text
 
-    parameters = wtypes.text
+    input = wtypes.text
     output = wtypes.text
 
     created_at = wtypes.text
@@ -59,7 +59,7 @@ class Task(resource.Resource):
             if hasattr(e, key):
                 # Nonetype check for dictionary must be explicit
                 if val is not None and (
-                        key == 'parameters' or key == 'output'):
+                        key == 'input' or key == 'output'):
                     val = json.dumps(val)
                 setattr(e, key, val)
 
@@ -75,7 +75,7 @@ class Task(resource.Resource):
                    # TODO(everyone): replace with states.SUCCESS
                    state='SUCCESS',
                    tags=['foo', 'fee'],
-                   parameters='{"first_name": "John", "last_name": "Doe"}',
+                   input='{"first_name": "John", "last_name": "Doe"}',
                    output='{"task": {"build_greeting": '
                           '{"greeting": "Hello, John Doe!"}}}',
                    created_at='1970-01-01T00:00:00.000000',

mistral/db/v2/sqlalchemy/models.py

@@ -98,7 +98,7 @@ class Task(mb.MistralModelBase):
 
     # Data Flow properties.
     in_context = sa.Column(st.JsonDictType())
-    parameters = sa.Column(st.JsonDictType())
+    input = sa.Column(st.JsonDictType())
     output = sa.Column(st.JsonDictType())
 
     # Runtime context like iteration_no of a repeater.
@@ -148,7 +148,7 @@ class Action(mb.MistralModelBase):
     id = mb.id_column()
     name = sa.Column(sa.String(200))
     description = sa.Column(sa.Text())
-    parameters = sa.Column(sa.String(240))
+    input = sa.Column(sa.String(240))
 
     # Ad-hoc action properties.
     definition = sa.Column(sa.Text(), nullable=True)

mistral/engine1/commands.py

@@ -64,7 +64,7 @@ class RunTask(EngineCommand):
 
         self.task_db = self._create_db_task(exec_db)
 
-        # Evaluate Data Flow properties ('parameters', 'in_context').
+        # Evaluate Data Flow properties ('input', 'in_context').
         data_flow.prepare_db_task(
             self.task_db,
             self.task_spec,
@@ -83,7 +83,7 @@ class RunTask(EngineCommand):
             'name': self.task_spec.get_name(),
             'state': states.RUNNING,
             'spec': self.task_spec.to_dict(),
-            'parameters': None,
+            'input': None,
             'in_context': None,
             'output': None,
             'runtime_context': None
@@ -111,7 +111,7 @@ class RunTask(EngineCommand):
             action_spec_name
         )
 
-        action_params = self.task_db.parameters or {}
+        action_input = self.task_db.input or {}
 
         if action_db.spec:
             # Ad-hoc action.
@@ -125,21 +125,21 @@ class RunTask(EngineCommand):
                 base_name
             )
 
-            base_params = action_spec.get_base_parameters()
+            base_input = action_spec.get_base_input()
 
-            if base_params:
-                action_params = expr.evaluate_recursively(
-                    base_params,
-                    action_params
+            if base_input:
+                action_input = expr.evaluate_recursively(
+                    base_input,
+                    action_input
                 )
             else:
-                action_params = {}
+                action_input = {}
 
         rpc.get_executor_client().run_action(
             self.task_db.id,
             action_db.action_class,
             action_db.attributes or {},
-            action_params
+            action_input
         )
 
     def _run_workflow(self):
@@ -156,12 +156,12 @@ class RunTask(EngineCommand):
 
         wf_spec = spec_parser.get_workflow_spec(wf_db.spec)
 
-        wf_input = self.task_db.parameters
+        wf_input = self.task_db.input
 
         start_params = {'parent_task_id': self.task_db.id}
 
         for k, v in wf_input.items():
-            if k not in wf_spec.get_parameters():
+            if k not in wf_spec.get_input():
                 start_params[k] = v
                 del wf_input[k]
 

mistral/engine1/utils.py

@@ -28,7 +28,7 @@ def validate_workflow_input(wf_db, wf_spec, wf_input):
     input_param_names = copy.copy((wf_input or {}).keys())
     missing_param_names = []
 
-    for p_name in wf_spec.get_parameters():
+    for p_name in wf_spec.get_input():
         if p_name not in input_param_names:
             missing_param_names.append(p_name)
         else:

mistral/services/action_manager.py

@@ -37,13 +37,13 @@ def get_registered_actions(**kwargs):
 
 
 def _register_action_in_db(name, action_class, attributes,
-                           description=None, parameter_str=None):
+                           description=None, input_str=None):
     values = {
         'name': name,
         'action_class': action_class,
         'attributes': attributes,
         'description': description,
-        'parameters': parameter_str,
+        'input': input_str,
         'is_system': True
     }
 
@@ -97,13 +97,13 @@ def register_action_classes():
             action_class_str = mgr[name].entry_point_target.replace(':', '.')
             action_class = mgr[name].plugin
             description = i_utils.get_docstring(action_class)
-            parameter_str = i_utils.get_arg_list_as_str(action_class.__init__)
+            input_str = i_utils.get_arg_list_as_str(action_class.__init__)
 
             attrs = i_utils.get_public_fields(mgr[name].plugin)
 
             _register_action_in_db(name, action_class_str, attrs,
                                    description=description,
-                                   parameter_str=parameter_str)
+                                   input_str=input_str)
 
         _register_dynamic_action_classes()
 

mistral/tests/unit/actions/test_action_factory.py

@@ -25,6 +25,7 @@ from mistral.services import action_manager as a_m
 from mistral.tests import base
 from mistral.workbook import parser as spec_parser
 
+# TODO(rakhmerov): Deprecated. Remove it once engine v1 is gone.
 
 LOG = logging.getLogger(__name__)
 

mistral/tests/unit/api/base.py

@@ -112,7 +112,9 @@ class FunctionalTest(base.DbTestCase):
             self.app.get(url, headers={'Accept': 'application/json'})
         except webtest_app.AppError as error:
             self.assertIn('Bad response: 404 Not Found', str(error))
+
             return
+
         self.fail('Expected 404 Not found but got OK')
 
     def assertUnauthorized(self, url):
@@ -120,5 +122,7 @@ class FunctionalTest(base.DbTestCase):
             self.app.get(url, headers={'Accept': 'application/json'})
         except webtest_app.AppError as error:
             self.assertIn('Bad response: 401 Unauthorized', str(error))
+
             return
+
         self.fail('Expected 401 Unauthorized but got OK')

mistral/tests/unit/api/v2/test_actions.py

@@ -29,7 +29,7 @@ version: '2.0'
 
 description: My super cool action.
 base: std.echo
-base-parameters:
+base-input:
   output: "{$.str1}{$.str2}"
 """
 
@@ -57,7 +57,7 @@ UPDATED_ACTION_DEFINITION = """
 version: '2.0'
 
 base: std.echo
-base-parameters:
+base-input:
   output: "{$.str1}{$.str2}{$.str3}"
 """
 

mistral/tests/unit/api/v2/test_tasks.py

@@ -38,7 +38,7 @@ TASK_DB = models.Task(
     state=states.RUNNING,
     tags=['a', 'b'],
     in_context={},
-    parameters={},
+    input={},
     output={},
     runtime_context={},
     execution_id='123',
@@ -50,15 +50,11 @@ TASK = {
     'id': '123',
     'name': 'task',
     'wf_name': 'flow',
-
     'state': 'RUNNING',
     'result': '{}',
-
-    'parameters': '{}',
+    'input': '{}',
     'output': '{}',
-
     'execution_id': '123',
-
     'created_at': '1970-01-01 00:00:00',
     'updated_at': '1970-01-01 00:00:00'
 }

mistral/tests/unit/api/v2/test_workflows.py

@@ -28,7 +28,7 @@ WF_DEFINITION = """
 version: '2.0'
 
 type: direct
-parameters:
+input:
   - param1
 
 tasks:
@@ -61,7 +61,7 @@ UPDATED_WF_DEFINITION = """
 version: '2.0'
 
 type: direct
-parameters:
+input:
   - param1
 
 tasks:

mistral/tests/unit/db/v2/test_sqlalchemy_db_api.py

@@ -477,7 +477,7 @@ TASKS = [
         'state': 'IDLE',
         'tags': ['deployment'],
         'in_context': None,
-        'parameters': None,
+        'input': None,
         'output': None,
         'runtime_context': None,
         'created_at': None,
@@ -493,7 +493,7 @@ TASKS = [
         'state': 'IDLE',
         'tags': ['deployment'],
         'in_context': {'image_id': '123123'},
-        'parameters': {'image_id': '123123'},
+        'input': {'image_id': '123123'},
         'output': {'vm_id': '343123'},
         'runtime_context': None,
         'created_at': None,

mistral/tests/unit/engine1/test_adhoc_actions.py

@@ -33,9 +33,9 @@ version: '2.0'
 actions:
   concat_twice:
     base: std.echo
-    base-parameters:
+    base-input:
       output: "{$.s1}+{$.s2}"
-    parameters:
+    input:
       - s1
       - s2
     output: "{$} and {$}"
@@ -43,7 +43,7 @@ actions:
 workflows:
   wf1:
     type: direct
-    parameters:
+    input:
       - str1
       - str2
     output:
@@ -78,6 +78,10 @@ class AdhocActionsTest(base.EngineTestCase):
 
         exec_db = db_api.get_execution(exec_db.id)
 
-        self.assertDictEqual({'workflow_result': 'a+b and a+b',
-                             'concat_task_result': 'a+b and a+b'},
-                             exec_db.output)
+        self.assertDictEqual(
+            {
+                'workflow_result': 'a+b and a+b',
+                'concat_task_result': 'a+b and a+b'
+            },
+            exec_db.output
+        )

mistral/tests/unit/engine1/test_default_engine.py

@@ -40,7 +40,7 @@ version: '2.0'
 workflows:
   wf1:
     type: reverse
-    parameters:
+    input:
       - param1
       - param2
 
@@ -109,7 +109,7 @@ class DefaultEngineTest(base.DbTestCase):
         # Data Flow properties.
         self._assert_dict_contains_subset(wf_input, task_db.in_context)
         self.assertIn('__execution', task_db.in_context)
-        self.assertDictEqual({'output': 'Hey'}, task_db.parameters)
+        self.assertDictEqual({'output': 'Hey'}, task_db.input)
 
     def test_start_workflow_missing_parameters(self):
         self.assertRaises(
@@ -158,7 +158,7 @@ class DefaultEngineTest(base.DbTestCase):
         self.assertIsNone(task_db.runtime_context)
         self._assert_dict_contains_subset(wf_input, task_db.in_context)
         self.assertIn('__execution', task_db.in_context)
-        self.assertDictEqual({'output': 'Hey'}, task_db.parameters)
+        self.assertDictEqual({'output': 'Hey'}, task_db.input)
 
         # Finish 'task1'.
         task1_db = self.engine.on_task_result(
@@ -173,7 +173,7 @@ class DefaultEngineTest(base.DbTestCase):
         # Data Flow properties.
         self._assert_dict_contains_subset(wf_input, task1_db.in_context)
         self.assertIn('__execution', task_db.in_context)
-        self.assertDictEqual({'output': 'Hey'}, task1_db.parameters)
+        self.assertDictEqual({'output': 'Hey'}, task1_db.input)
         self.assertDictEqual(
             {
                 'result': 'Hey',
@@ -213,7 +213,7 @@ class DefaultEngineTest(base.DbTestCase):
 
         self._assert_dict_contains_subset(in_context, task2_db.in_context)
         self.assertIn('__execution', task_db.in_context)
-        self.assertDictEqual({'output': 'Hi'}, task2_db.parameters)
+        self.assertDictEqual({'output': 'Hi'}, task2_db.input)
         self.assertDictEqual({'task': {'task2': 'Hi'}}, task2_db.output)
 
         self.assertEqual(2, len(exec_db.tasks))

mistral/tests/unit/engine1/test_engine_instructions.py

@@ -34,7 +34,7 @@ version: '2.0'
 workflows:
   wf:
     type: direct
-    parameters:
+    input:
       - my_var
 
     tasks:
@@ -111,7 +111,7 @@ version: '2.0'
 workflows:
   wf:
     type: direct
-    parameters:
+    input:
       - my_var
 
     on-task-complete:

mistral/tests/unit/engine1/test_reverse_workflow.py

@@ -34,7 +34,7 @@ version: '2.0'
 workflows:
   wf1:
     type: reverse
-    parameters:
+    input:
       - param1
       - param2
 

mistral/tests/unit/engine1/test_subworkflows.py

@@ -36,7 +36,7 @@ version: '2.0'
 workflows:
   wf1:
     type: reverse
-    parameters:
+    input:
       - param1
       - param2
     output:

mistral/tests/unit/services/test_action_manager.py

@@ -17,17 +17,19 @@ from mistral.tests import base
 
 
 class ActionManagerTest(base.DbTestCase):
-    def test_action_parameters(self):
+    def test_action_input(self):
         std_http = db_api.get_action("std.http")
         std_email = db_api.get_action("std.email")
 
-        http_action_params = ("url, method=GET, params=None, body=None, "
-                              "headers=None, cookies=None, auth=None, "
-                              "timeout=None, allow_redirects=None, "
-                              "proxies=None")
+        http_action_input = (
+            "url, method=GET, params=None, body=None, "
+            "headers=None, cookies=None, auth=None, "
+            "timeout=None, allow_redirects=None, "
+            "proxies=None"
+        )
 
-        self.assertEqual(http_action_params, std_http.parameters)
-        self.assertEqual("params, settings", std_email.parameters)
+        self.assertEqual(http_action_input, std_http.input)
+        self.assertEqual("params, settings", std_email.input)
 
     def test_action_description(self):
         std_http = db_api.get_action("std.http")

mistral/tests/unit/services/test_workbook_service.py

@@ -34,13 +34,13 @@ version: '2.0'
 actions:
   concat:
     base: std.echo
-    base-parameters:
+    base-input:
       output: "{$.str1}{$.str2}"
 
 workflows:
   wf1:
     type: reverse
-    parameters:
+    input:
       - param1
     output:
       result: $.result
@@ -70,7 +70,7 @@ version: '2.0'
 actions:
   concat:
     base: std.echo
-    base-parameters:
+    base-input:
       output: "{$.str1}{$.str2}"
 
 workflows:
@@ -87,7 +87,7 @@ workflows:
 
   wf2:
     type: reverse
-    parameters:
+    input:
       - param1
     output:
       result: $.result

mistral/tests/unit/test_expressions.py

@@ -28,15 +28,9 @@ DATA = {
 
 SERVERS = {
     "servers": [
-        {
-            'name': 'centos'
-        },
-        {
-            'name': 'ubuntu'
-        },
-        {
-            'name': 'fedora'
-        }
+        {'name': 'centos'},
+        {'name': 'ubuntu'},
+        {'name': 'fedora'}
     ]
 }
 
@@ -87,10 +81,12 @@ class YaqlEvaluatorTest(base.BaseTest):
                 'new_key11': 'new_key1'
             }
         }
-        modified_task = expr.evaluate_recursively(task_spec_dict,
-                                                  {
-                                                      'param2': 'val32'
-                                                  })
+        modified_task = expr.evaluate_recursively(
+            task_spec_dict,
+            {
+                'param2': 'val32'
+            }
+        )
 
         self.assertDictEqual(
             {
@@ -103,13 +99,15 @@ class YaqlEvaluatorTest(base.BaseTest):
                     'new_key11': 'new_key1'
                 }
             },
-            modified_task)
+            modified_task
+        )
 
     def test_evaluate_recursively_arbitrary_dict(self):
         context = {
             "auth_token": "123",
             "project_id": "mistral"
         }
+
         data = {
             "parameters": {
                 "parameter1": {
@@ -138,4 +136,5 @@ class YaqlEvaluatorTest(base.BaseTest):
                 },
                 "token": "123"
             },
-            applied)
+            applied
+        )

mistral/tests/unit/utils/test_inpect_utils.py

@@ -22,10 +22,13 @@ class InspectUtilsTest(base.BaseTest):
         action_class = std_actions.HTTPAction
         parameters_str = i_u.get_arg_list_as_str(action_class.__init__)
 
-        http_action_params = ("url, method=GET, params=None, body=None, "
-                              "headers=None, cookies=None, auth=None, "
-                              "timeout=None, allow_redirects=None, "
-                              "proxies=None")
+        http_action_params = (
+            "url, method=GET, params=None, body=None, "
+            "headers=None, cookies=None, auth=None, "
+            "timeout=None, allow_redirects=None, "
+            "proxies=None"
+        )
+
         self.assertEqual(http_action_params, parameters_str)
 
     def test_get_parameters_str_all_mandatory(self):

mistral/tests/unit/workbook/v2/test_dsl_specs_v2.py

@@ -27,7 +27,7 @@ actions:
   action1:
     description: This is a test ad-hoc action
     base: std.echo
-    base-parameters:
+    base-input:
         output: "Hello {$.name}!"
     output: $
 
@@ -41,7 +41,7 @@ workflows:
     description: This is a test workflow
     type: reverse
 
-    parameters:
+    input:
       - name
       - age
 
@@ -136,9 +136,9 @@ class DSLv2ModelTest(base.BaseTest):
         self.assertEqual('std.echo', action_spec.get_base())
         self.assertDictEqual(
             {'output': 'Hello {$.name}!'},
-            action_spec.get_base_parameters()
+            action_spec.get_base_input()
         )
-        self.assertDictEqual({}, action_spec.get_parameters())
+        self.assertDictEqual({}, action_spec.get_input())
         self.assertEqual('$', action_spec.get_output())
 
         # Workflows.
@@ -165,7 +165,7 @@ class DSLv2ModelTest(base.BaseTest):
         self.assertEqual('task1', task1_spec.get_name())
         self.assertEqual('This is a test task', task1_spec.get_description())
         self.assertEqual('ns1.action1', task1_spec.get_action_name())
-        self.assertEqual({'name': '{$.name}'}, task1_spec.get_parameters())
+        self.assertEqual({'name': '{$.name}'}, task1_spec.get_input())
 
         policies = task1_spec.get_policies()
 
@@ -187,7 +187,7 @@ class DSLv2ModelTest(base.BaseTest):
         self.assertIsNone(task2_spec.get_workflow_name())
         self.assertEqual(
             {'output': 'Thanks {$.name}!'},
-            task2_spec.get_parameters()
+            task2_spec.get_input()
         )
 
         wf2_spec = wf_specs.get('wf2')
@@ -220,7 +220,7 @@ class DSLv2ModelTest(base.BaseTest):
                 'param1': None,
                 'param2': False
             },
-            task3_spec.get_parameters()
+            task3_spec.get_input()
         )
         self.assertListEqual(
             [('task4', '$.my_val = 1')],
@@ -242,7 +242,7 @@ class DSLv2ModelTest(base.BaseTest):
                 'is_true': True,
                 'object_list': [1, None, 'str'],
             },
-            task7_spec.get_parameters()
+            task7_spec.get_input()
         )
 
         task8_spec = wf2_spec.get_tasks().get('task8')
@@ -252,7 +252,7 @@ class DSLv2ModelTest(base.BaseTest):
                 'expr_list': ['$.value', '{$.key}'],
                 'expr': '{$.value}',
             },
-            task8_spec.get_parameters()
+            task8_spec.get_input()
         )
 
     def test_adhoc_action_with_base_in_one_string(self):
@@ -263,7 +263,7 @@ class DSLv2ModelTest(base.BaseTest):
 
         self.assertEqual("std.echo", action_spec.get_base())
         self.assertEqual({'output': 'Echo output'},
-                         action_spec.get_base_parameters())
+                         action_spec.get_base_input())
 
     def test_to_dict(self):
         wb_spec = spec_parser.get_workbook_spec_from_yaml(VALID_WB)

mistral/workbook/base.py

@@ -85,7 +85,7 @@ class BaseSpec(object):
         return val.items()[0] if isinstance(val, dict) else (val, '')
 
     @staticmethod
-    def _parse_cmd_and_params(cmd_str):
+    def _parse_cmd_and_input(cmd_str):
         # TODO(rakhmerov): Try to find a way with one expression.
         cmd_matcher = CMD_PTRN.search(cmd_str)
 

mistral/workbook/v2/actions.py

@@ -27,8 +27,8 @@ class ActionSpec(base.BaseSpec):
             "name": {"type": "string"},
             "description": {"type": "string"},
             "base": {"type": "string"},
-            "base-parameters": {"type": "object"},
-            "parameters": {"type": "array"},
+            "base-input": {"type": "object"},
+            "input": {"type": "array"},
             "output": {"type": ["string", "object", "array", "null"]},
         },
         "required": ["version", "name", "base"],
@@ -43,13 +43,13 @@ class ActionSpec(base.BaseSpec):
         self._name = data['name']
         self._description = data.get('description')
         self._base = data['base']
-        self._base_parameters = data.get('base-parameters', {})
-        self._parameters = data.get('parameters', {})
+        self._base_input = data.get('base-input', {})
+        self._input = data.get('input', {})
         self._output = data.get('output')
 
-        self._base, params = self._parse_cmd_and_params(self._base)
+        self._base, _input = self._parse_cmd_and_input(self._base)
 
-        utils.merge_dicts(self._base_parameters, params)
+        utils.merge_dicts(self._base_input, _input)
 
     def get_name(self):
         return self._name
@@ -60,11 +60,11 @@ class ActionSpec(base.BaseSpec):
     def get_base(self):
         return self._base
 
-    def get_base_parameters(self):
-        return self._base_parameters
+    def get_base_input(self):
+        return self._base_input
 
-    def get_parameters(self):
-        return self._parameters
+    def get_input(self):
+        return self._input
 
     def get_output(self):
         return self._output

mistral/workbook/v2/tasks.py

@@ -32,7 +32,7 @@ class TaskSpec(base.BaseSpec):
             "description": {"type": "string"},
             "action": {"type": ["string", "null"]},
             "workflow": {"type": ["string", "null"]},
-            "parameters": {"type": ["object", "null"]},
+            "input": {"type": ["object", "null"]},
             "publish": {"type": ["object", "null"]},
             "policies": {"type": ["object", "null"]},
             "requires": {"type": ["string", "array", "null"]},
@@ -53,7 +53,7 @@ class TaskSpec(base.BaseSpec):
         self._description = data.get('description')
         self._action = data.get('action')
         self._workflow = data.get('workflow')
-        self._parameters = data.get('parameters', {})
+        self._input = data.get('input', {})
         self._publish = data.get('publish', {})
         self._policies = self._spec_property(
             'policies',
@@ -80,12 +80,12 @@ class TaskSpec(base.BaseSpec):
         params = {}
 
         if self._action:
-            self._action, params = self._parse_cmd_and_params(self._action)
+            self._action, params = self._parse_cmd_and_input(self._action)
         elif self._workflow:
-            self._workflow, params = self._parse_cmd_and_params(
+            self._workflow, params = self._parse_cmd_and_input(
                 self._workflow)
 
-        utils.merge_dicts(self._parameters, params)
+        utils.merge_dicts(self._input, params)
 
     def get_name(self):
         return self._name
@@ -99,8 +99,8 @@ class TaskSpec(base.BaseSpec):
     def get_workflow_name(self):
         return self._workflow
 
-    def get_parameters(self):
-        return self._parameters
+    def get_input(self):
+        return self._input
 
     def get_policies(self):
         return self._policies

mistral/workbook/v2/workflows.py

@@ -29,7 +29,7 @@ class WorkflowSpec(base.BaseSpec):
             "on-task-complete": {"type": ["array", "null"]},
             "on-task-success": {"type": ["array", "null"]},
             "on-task-error": {"type": ["array", "null"]},
-            "parameters": {"type": ["array", "null"]},
+            "input": {"type": ["array", "null"]},
             "output": {"type": ["string", "object", "array", "null"]},
             "tasks": {"type": "object"},
         },
@@ -45,9 +45,10 @@ class WorkflowSpec(base.BaseSpec):
         self._name = data['name']
         self._description = data.get('description')
         self._type = data['type']
-        self._parameters = data.get('parameters', {})
+        self._input = data.get('input', [])
         self._output = data.get('output', {})
-        # TODO(rakhmerov): Build workflow policies specification.
+
+        # TODO(rakhmerov): Implement 'task-defaults' instead.
         self._policies = None
         self._on_task_complete = self._as_list_of_tuples("on-task-complete")
         self._on_task_success = self._as_list_of_tuples("on-task-success")
@@ -64,8 +65,8 @@ class WorkflowSpec(base.BaseSpec):
     def get_type(self):
         return self._type
 
-    def get_parameters(self):
-        return self._parameters
+    def get_input(self):
+        return self._input
 
     def get_output(self):
         return self._output

mistral/workflow/base.py

@@ -63,6 +63,8 @@ class WorkflowHandler(object):
         (before publisher). Instance of mistral.workflow.utils.TaskResult
         :return List of engine commands that needs to be performed.
         """
+        # TODO(rakhmerov): need to ignore result if task is complete.
+
         task_db.state = \
             states.ERROR if raw_result.is_error() else states.SUCCESS
 

mistral/workflow/data_flow.py

@@ -31,7 +31,7 @@ CONF = cfg.CONF
 
 def prepare_db_task(task_db, task_spec, upstream_task_specs, exec_db,
                     cause_task_db=None):
-    """Prepare Data Flow properties ('in_context' and 'parameters')
+    """Prepare Data Flow properties ('in_context' and 'input')
      of given DB task.
 
     :param task_db: DB task to prepare.
@@ -59,14 +59,14 @@ def prepare_db_task(task_db, task_spec, upstream_task_specs, exec_db,
             old_task_output
         )
 
-    task_db.parameters = evaluate_task_parameters(
+    task_db.input = evaluate_task_input(
         task_spec,
         task_db.in_context
     )
 
 
-def evaluate_task_parameters(task_spec, context):
-    return expr.evaluate_recursively(task_spec.get_parameters(), context)
+def evaluate_task_input(task_spec, context):
+    return expr.evaluate_recursively(task_spec.get_input(), context)
 
 
 def _evaluate_upstream_context(upstream_db_tasks):