add BaseAgent methods to retrieve and list results

teeth_agent/base.py

@@ -188,7 +188,7 @@ class BaseTeethAgent(object):
         self.mode = mode
         self.version = pkg_resources.get_distribution('teeth-agent').version
         self.api = api.TeethAgentAPIServer(self)
-        self.command_results = {}
+        self.command_results = collections.OrderedDict()
         self.command_map = {}
         self.heartbeater = TeethAgentHeartbeater(self)
         self.hardware = hardware.HardwareInspector()
@@ -210,6 +210,16 @@ class BaseTeethAgent(object):
     def get_agent_mac_addr(self):
         return self.hardware.get_primary_mac_address()
 
+    def list_command_results(self):
+        return self.command_results.values()
+
+    def get_command_result(self, result_id):
+        try:
+            return self.command_results[result_id]
+        except KeyError:
+            raise errors.RequestedObjectNotFoundError('Command Result',
+                                                      result_id)
+
     def execute_command(self, command_name, **kwargs):
         """Execute an agent command."""
         if command_name not in self.command_map:

teeth_agent/errors.py

@@ -46,6 +46,13 @@ class InvalidCommandParamsError(errors.InvalidContentError):
         super(InvalidCommandParamsError, self).__init__(details)
 
 
+class RequestedObjectNotFoundError(errors.NotFound):
+    def __init__(self, type_descr, obj_id):
+        details = '{} with id {} not found.'.format(type_descr, obj_id)
+        super(RequestedObjectNotFoundError, self).__init__(details)
+        self.details = details
+
+
 class HeartbeatError(errors.RESTError):
     """Error raised when a heartbeat to the agent API fails."""