#2064: Edited services and applications to handle when they are shut down

src/primaite/simulator/system/services/ftp/ftp_client.py

@@ -72,10 +72,7 @@ class FTPClient(FTPServiceABC):
 
         # normally FTP will choose a random port for the transfer, but using the FTP command port will do for now
         # create FTP packet
-        payload: FTPPacket = FTPPacket(
-            ftp_command=FTPCommand.PORT,
-            ftp_command_args=Port.FTP,
-        )
+        payload: FTPPacket = FTPPacket(ftp_command=FTPCommand.PORT, ftp_command_args=Port.FTP)
 
         if self.send(payload=payload, dest_ip_address=dest_ip_address, dest_port=dest_port, session_id=session_id):
             if payload.status_code == FTPStatusCode.OK:
@@ -271,7 +268,10 @@ class FTPClient(FTPServiceABC):
         the same node.
         """
         if payload.status_code is None:
+            self.sys_log.error(f"FTP Server could not be found - Error Code: {payload.status_code.value}")
             return False
 
+        self.sys_log.info(f"{self.name}: Received FTP Response {payload.ftp_command.name} {payload.status_code.value}")
+
         self._process_ftp_command(payload=payload, session_id=session_id)
         return True

src/primaite/simulator/system/services/ftp/ftp_server.py

@@ -89,5 +89,8 @@ class FTPServer(FTPServiceABC):
         if payload.status_code is not None:
             return False
 
+        if not super().receive(payload=payload, session_id=session_id, **kwargs):
+            return False
+
         self.send(self._process_ftp_command(payload=payload, session_id=session_id), session_id)
         return True

src/primaite/simulator/system/services/service.py

@@ -1,8 +1,9 @@
 from enum import Enum
-from typing import Dict, Optional
+from typing import Any, Dict, Optional
 
 from primaite import getLogger
 from primaite.simulator.core import RequestManager, RequestType
+from primaite.simulator.network.hardware.node_operating_state import NodeOperatingState
 from primaite.simulator.system.software import IOSoftware, SoftwareHealthState
 
 _LOGGER = getLogger(__name__)
@@ -40,6 +41,21 @@ class Service(IOSoftware):
     restart_countdown: Optional[int] = None
     "If currently restarting, how many timesteps remain until the restart is finished."
 
+    def receive(self, payload: Any, session_id: str, **kwargs) -> bool:
+        """
+        Receives a payload from the SessionManager.
+
+        The specifics of how the payload is processed and whether a response payload
+        is generated should be implemented in subclasses.
+
+
+        :param payload: The payload to receive.
+        :param session_id: The identifier of the session that the payload is associated with.
+        :param kwargs: Additional keyword arguments specific to the implementation.
+        :return: True if the payload was successfully received and processed, False otherwise.
+        """
+        return super().receive(payload=payload, session_id=session_id, **kwargs)
+
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
 
@@ -91,6 +107,11 @@ class Service(IOSoftware):
 
     def start(self, **kwargs) -> None:
         """Start the service."""
+        # cant start the service if the node it is on is off
+        if self.software_manager and self.software_manager.node.operating_state is not NodeOperatingState.ON:
+            self.sys_log.error(f"Unable to start service. {self.software_manager.node.hostname} is not turned on.")
+            return
+
         if self.operating_state == ServiceOperatingState.STOPPED:
             self.sys_log.info(f"Starting service {self.name}")
             self.operating_state = ServiceOperatingState.RUNNING

src/primaite/simulator/system/services/web_server/web_server.py

@@ -160,4 +160,7 @@ class WebServer(Service):
             self.sys_log.error("Payload is not an HTTPPacket")
             return False
 
+        if not super().receive(payload=payload, session_id=session_id, **kwargs):
+            return False
+
         return self._process_http_request(payload=payload, session_id=session_id)