Move custom event handlers away

solvable/src/custom_event_handlers.py

@@ -0,0 +1,100 @@
+import logging
+from ast import literal_eval
+
+from tfw.components import MessageSender, TerminalCommands
+from tfw.builtins import EventHandler, FSMAwareEventHandler, TFWServerUplinkConnector
+
+LOG = logging.getLogger(__name__)
+
+
+class TerminalCallbackEventHandler(EventHandler):
+    """
+    Logs commands executed in terminal to messages and invokes an
+    additional callback function to handle special commands.
+    !! Please remove from production code. !!
+    """
+    def __init__(self, key, callback):
+        self.callback = callback
+        super().__init__(key)
+
+    def handle_event(self, message):
+        command = message['value']
+        self.cenator(command)
+        self.callback(command)
+
+    def cenator(self, command):
+        LOG.debug('User executed command: "%s"', command)
+        MessageSender(self.server_connector).send('JOHN CENA', f'You\'ve executed "{command}"')
+
+
+class TestCommands(TerminalCommands):
+    """
+    Some example commands useful for debugging.
+    !! Please remove from production code !! and inherit your own
+    class from TerminalCommands if you need to define custom
+    commands in your challenge.
+    """
+    # pylint: disable=unused-argument, attribute-defined-outside-init, no-self-use
+    def command_sendmessage(self, *args):
+        """
+        Insert TFW message template as first argument if executed without args.
+
+        Evaluate first argumen as a dict and send it to the frontend.
+        This is useful for playing around with frontend APIs.
+        """
+        if not args:
+            message_template = """'{"key": "", "data": {"command": ""}}'"""
+            TFWServerUplinkConnector().send_message({
+                'key': 'shell',
+                'data': {
+                    'command': 'write',
+                    'value': f'sendmessage {message_template}'
+                }
+            })
+        else:
+            TFWServerUplinkConnector().send_message(literal_eval(args[0]))
+
+    def command_seppuku_tfw(self, *args):
+        """
+        Restart tfw_server.py and event_handler_main.py.
+        This can speed up development when combined with mounting
+        volumes from host to container.
+        """
+        seppuku = (
+            'nohup sh -c "supervisorctl restart tfwserver event_handler_main" &> /dev/null & '
+            'clear && echo "Committed seppuku! :)" && sleep infinity'
+        )
+        uplink = TFWServerUplinkConnector()
+        uplink.send_message({
+            'key': 'shell',
+            'data': {
+                'command': 'write',
+                'value': f'{seppuku}\n'
+            }
+        })
+        uplink.send_message({
+            'key': 'dashboard',
+            'data': {
+                'command': 'reloadFrontend'
+            }
+        })
+
+
+class MessageFSMStepsEventHandler(FSMAwareEventHandler):
+    """
+    This example EventHandler is capable of detecting FSM state.
+    !! Please remove from production code !!
+    """
+    def handle_event(self, message):
+        pass
+
+    def handle_fsm_step(self, **kwargs):
+        """
+        When the FSM steps this method is invoked.
+        Receives a 'data' field from an fsm_update message as kwargs.
+        """
+        MessageSender(self.server_connector).send(
+            'FSM info',
+            f'FSM has stepped from state "{kwargs["last_event"]["from_state"]}" '
+            f'to state "{kwargs["current_state"]}" in response to trigger "{kwargs["last_event"]["trigger"]}"'
+        )

solvable/src/event_handler_main.py

@@ -1,118 +1,25 @@
 import logging
 from sys import stderr
-from ast import literal_eval
 from functools import partial
 from signal import signal, SIGTERM, SIGINT
 
 from tornado.ioloop import IOLoop
 
 from tfw.fsm import YamlFSM
-from tfw.builtins import EventHandler, FSMAwareEventHandler, TFWServerUplinkConnector
+from tfw.builtins import EventHandler
 from tfw.builtins import IdeEventHandler, TerminalEventHandler, FrontendEventHandler
 from tfw.builtins import LogMonitoringEventHandler, ProcessManagingEventHandler
-from tfw.builtins import DirectorySnapshottingEventHandler, FSMManagingEventHandler, MessageSender
-from tfw.components import TerminalCommands
+from tfw.builtins import DirectorySnapshottingEventHandler, FSMManagingEventHandler
 from tfw.config import TFWENV
 from tfw.logging import Log, Logger, LogFormatter, VerboseLogFormatter
 from tao.config import TAOENV
 
+from custom_event_handlers import MessageFSMStepsEventHandler
+from custom_event_handlers import TerminalCallbackEventHandler, TestCommands
+
 LOG = logging.getLogger(__name__)
 
 
-class TerminalCallbackEventHandler(EventHandler):
-    """
-    Logs commands executed in terminal to messages and invokes an
-    additional callback function to handle special commands.
-    !! Please remove from production code. !!
-    """
-    def __init__(self, key, callback):
-        self.callback = callback
-        super().__init__(key)
-
-    def handle_event(self, message):
-        command = message['value']
-        self.cenator(command)
-        self.callback(command)
-
-    @staticmethod
-    def cenator(command):
-        LOG.debug('User executed command: "%s"', command)
-        MessageSender().send('JOHN CENA', f'You\'ve executed "{command}"')
-
-
-class TestCommands(TerminalCommands):
-    """
-    Some example commands useful for debugging.
-    !! Please remove from production code !! and inherit your own
-    class from TerminalCommands if you need to define custom
-    commands in your challenge.
-    """
-    # pylint: disable=unused-argument, attribute-defined-outside-init, no-self-use
-    def command_sendmessage(self, *args):
-        """
-        Insert TFW message template as first argument if executed without args.
-
-        Evaluate first argumen as a dict and send it to the frontend.
-        This is useful for playing around with frontend APIs.
-        """
-        if not args:
-            message_template = """'{"key": "", "data": {"command": ""}}'"""
-            TFWServerUplinkConnector().send_message({
-                'key': 'shell',
-                'data': {
-                    'command': 'write',
-                    'value': f'sendmessage {message_template}'
-                }
-            })
-        else:
-            TFWServerUplinkConnector().send_message(literal_eval(args[0]))
-
-    def command_seppuku_tfw(self, *args):
-        """
-        Restart tfw_server.py and event_handler_main.py.
-        This can speed up development when combined with mounting
-        volumes from host to container.
-        """
-        seppuku = (
-            'nohup sh -c "supervisorctl restart tfwserver event_handler_main" &> /dev/null & '
-            'clear && echo "Committed seppuku! :)" && sleep infinity'
-        )
-        uplink = TFWServerUplinkConnector()
-        uplink.send_message({
-            'key': 'shell',
-            'data': {
-                'command': 'write',
-                'value': f'{seppuku}\n'
-            }
-        })
-        uplink.send_message({
-            'key': 'dashboard',
-            'data': {
-                'command': 'reloadFrontend'
-            }
-        })
-
-
-class MessageFSMStepsEventHandler(FSMAwareEventHandler):
-    """
-    This example EventHandler is capable of detecting FSM state.
-    !! Please remove from production code !!
-    """
-    def handle_event(self, message):
-        pass
-
-    def handle_fsm_step(self, **kwargs):
-        """
-        When the FSM steps this method is invoked.
-        Receives a 'data' field from an fsm_update message as kwargs.
-        """
-        MessageSender().send(
-            'FSM info',
-            f'FSM has stepped from state "{kwargs["last_event"]["from_state"]}" '
-            f'to state "{kwargs["current_state"]}" in response to trigger "{kwargs["last_event"]["trigger"]}"'
-        )
-
-
 def main():
     # pylint: disable=unused-variable
     Logger([
@@ -165,7 +72,7 @@ def main():
         key='test'
     )
 
-    def stop(*_): 
+    def stop(*_):
         EventHandler.stop_all_instances()
         exit(0)
     signal(SIGTERM, stop)

solvable/src/test_fsm.py

@@ -3,7 +3,8 @@
 from os.path import exists
 
 from tfw.fsm import LinearFSM
-from tfw.builtins import MessageSender
+from tfw.components import MessageSender
+from tfw.builtins import TFWServerUplinkConnector
 
 
 class TestFSM(LinearFSM):
@@ -11,7 +12,8 @@ class TestFSM(LinearFSM):
 
     def __init__(self):
         super().__init__(6)
-        self.message_sender = MessageSender()
+        self.uplink = TFWServerUplinkConnector()
+        self.message_sender = MessageSender(self.uplink)
         self.subscribe_predicate('step_3', self.step_3_allowed)
 
     @staticmethod