Add hide_args=True to @profiler.trace() where it may cause problems

* Without hide_args=True parameter @profiler.trace() works much
  slower because it gets string representation of decorated method
  parameters internally. Adding it slightly improves performance.

Change-Id: I75a8fecd2e37b1d25c6f70501711e709c2d2ae25

mistral/engine/default_engine.py

@@ -35,7 +35,7 @@ from mistral.workflow import states
 
 class DefaultEngine(base.Engine):
     @action_queue.process
-    @profiler.trace('engine-start-workflow')
+    @profiler.trace('engine-start-workflow', hide_args=True)
     def start_workflow(self, wf_identifier, wf_input, description='',
                        **params):
         with db_api.transaction():

mistral/engine/dispatcher.py

@@ -79,7 +79,7 @@ def _rearrange_commands(cmds):
     return res
 
 
-@profiler.trace('dispatcher-dispatch-commands')
+@profiler.trace('dispatcher-dispatch-commands', hide_args=True)
 def dispatch_workflow_commands(wf_ex, wf_cmds):
     # TODO(rakhmerov): I don't like these imports but otherwise we have
     # import cycles.

mistral/engine/workflow_handler.py

@@ -32,7 +32,7 @@ _CHECK_AND_COMPLETE_PATH = (
 )
 
 
-@profiler.trace('workflow-handler-start-workflow')
+@profiler.trace('workflow-handler-start-workflow', hide_args=True)
 def start_workflow(wf_identifier, wf_input, desc, params):
     wf = workflows.Workflow()
 
@@ -77,7 +77,7 @@ def cancel_workflow(wf_ex, msg=None):
     stop_workflow(wf_ex, states.CANCELLED, msg)
 
 
-@profiler.trace('workflow-handler-check-and-complete')
+@profiler.trace('workflow-handler-check-and-complete', hide_args=True)
 def _check_and_complete(wf_ex_id):
     # Note: This method can only be called via scheduler.
     with db_api.transaction():
@@ -146,7 +146,7 @@ def resume_workflow(wf_ex, env=None):
     wf.resume(env=env)
 
 
-@profiler.trace('workflow-handler-set-state')
+@profiler.trace('workflow-handler-set-state', hide_args=True)
 def set_workflow_state(wf_ex, state, msg=None):
     if states.is_completed(state):
         stop_workflow(wf_ex, state, msg)
@@ -163,7 +163,7 @@ def _get_completion_check_key(wf_ex):
     return 'wfh_on_c_a_c-%s' % wf_ex.id
 
 
-@profiler.trace('workflow-handler-schedule-check-and-complete')
+@profiler.trace('workflow-handler-schedule-check-and-complete', hide_args=True)
 def _schedule_check_and_complete(wf_ex, delay=0):
     """Schedules workflow completion check.
 

mistral/workflow/base.py

@@ -32,7 +32,7 @@ from mistral.workflow import states
 LOG = logging.getLogger(__name__)
 
 
-@profiler.trace('wf-controller-get-controller')
+@profiler.trace('wf-controller-get-controller', hide_args=True)
 def get_controller(wf_ex, wf_spec=None):
     """Gets a workflow controller instance by given workflow execution object.
 
@@ -85,7 +85,7 @@ class WorkflowController(object):
 
         self.wf_spec = wf_spec
 
-    @profiler.trace('workflow-controller-continue-workflow')
+    @profiler.trace('workflow-controller-continue-workflow', hide_args=True)
     def continue_workflow(self, task_ex=None):
         """Calculates a list of commands to continue the workflow.