Implement triggered and triggerless EventHandler base classes

lib/tfw/components/source_code_event_handler.py

@@ -2,7 +2,7 @@ from os.path import isfile, join, relpath
 from glob import glob
 
 from tfw.components.mixins import SupervisorMixin
-from tfw.event_handler_base import EventHandlerBase
+from tfw.event_handler_base import TriggerlessEventHandler
 from tfw.components.directory_monitor import DirectoryMonitor
 
 from tfw.config.logs import logging
@@ -43,7 +43,7 @@ class FileManager:
         return relpath(self._filepath(filename), start=self._workdir)
 
 
-class SourceCodeEventHandler(EventHandlerBase, SupervisorMixin):
+class SourceCodeEventHandler(TriggerlessEventHandler, SupervisorMixin):
     def __init__(self, key, directory, process_name, selected_file=None):
         super().__init__(key)
         self.filemanager = FileManager(directory, selected_file=selected_file)

lib/tfw/components/terminado_event_handler.py

@@ -1,11 +1,11 @@
-from tfw.event_handler_base import EventHandlerBase
+from tfw.event_handler_base import TriggerlessEventHandler
 from tfw.components.mixins import SupervisorMixin
 from tfw.config import tfwenv
 from tfw.config.logs import logging
 log = logging.getLogger(__name__)
 
 
-class TerminadoEventHandler(EventHandlerBase, SupervisorMixin):
+class TerminadoEventHandler(TriggerlessEventHandler, SupervisorMixin):
     def __init__(self, key, process_name):
         super().__init__(key)
         self.working_directory = tfwenv.TERMINADO_DIR

lib/tfw/event_handler_base.py

@@ -28,10 +28,17 @@ class EventHandlerBase:
         from .message_sender import MessageSender
         ms = MessageSender()
         ms.send('JOHN CENA', next(self.cenerator))
-        response = self.handle_event(key, message) if key != 'reset' else self.handle_reset(message)
+        response = self.dispatch_handling(key, message)
         if response is None: return
         self.server_connector.send(key, response)
 
+    def dispatch_handling(self, key, message):
+        raise NotImplementedError
+
+    def _dispatch_handling(self, key, message):
+        if key != 'reset': return self.handle_event(key, message)
+        else: return self.handle_reset(message)
+
     def handle_event(self, key, data_json):
         raise NotImplementedError
 
@@ -64,3 +71,18 @@ class EventHandlerBase:
         for sub in self.subscriptions:
             self.server_connector.unsubscribe(key=sub)
         self.subscriptions.clear()
+
+
+class TriggerlessEventHandler(EventHandlerBase):
+    def dispatch_handling(self, key, message):
+        return self._dispatch_handling(key, message)
+
+
+class TriggeredEventHandler(EventHandlerBase):
+    def __init__(self, key, trigger):
+        super().__init__(key)
+        self.trigger = trigger
+
+    def dispatch_handling(self, key, message):
+        if message.get('trigger') == self.trigger:
+            return self._dispatch_handling(key, message)