implement device shutdown on deletion or lack of profiles

owrx/connection.py

@@ -230,6 +230,11 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
         self.write_log_message('SDR device "{0}" was disabled, selecting new device'.format(self.sdr.getName()))
         self.setSdr()
 
+    def onShutdown(self):
+        logger.warning('SDR device "%s" is shutting down, selecting new device', self.sdr.getName())
+        self.write_log_message('SDR device "{0}" is shutting down, selecting new device'.format(self.sdr.getName()))
+        self.setSdr()
+
     def getClientClass(self) -> SdrClientClass:
         return SdrClientClass.USER
 

owrx/dsp.py

@@ -214,3 +214,6 @@ class DspManager(csdr.output, SdrSourceEventClient):
     def onFail(self):
         logger.debug("received onFail(), shutting down DspSource")
         self.dsp.stop()
+
+    def onShutdown(self):
+        self.dsp.stop()

owrx/fft.py

@@ -84,3 +84,6 @@ class SpectrumThread(csdr.output, SdrSourceEventClient):
 
     def onFail(self):
         self.dsp.stop()
+
+    def onShutdown(self):
+        self.dsp.stop()

owrx/sdr.py

@@ -27,7 +27,7 @@ class MappedSdrSources(PropertyDelegator):
         if self.isDeviceValid(value) and key not in self:
             self._addSource(key, value)
         elif not self.isDeviceValid(value) and key in self:
-            self._removeSource(key)
+            del self[key]
 
     def _addSource(self, key, value):
         if self.isDeviceValid(value):
@@ -38,13 +38,6 @@ class MappedSdrSources(PropertyDelegator):
             value["profiles"].wire(updateMethod)
         ]
 
-    def _removeSource(self, key):
-        if key in self:
-            self[key].stop()
-        for sub in self.subscriptions[key]:
-            sub.cancel()
-        del self.subscriptions[key]
-
     def isDeviceValid(self, device):
         return self._hasProfiles(device) and self._sdrTypeAvailable(device)
 
@@ -75,15 +68,23 @@ class MappedSdrSources(PropertyDelegator):
         cls = getattr(module, className)
         return cls(id, props)
 
+    def _removeSource(self, key, source):
+        source.shutdown()
+        for sub in self.subscriptions[key]:
+            sub.cancel()
+        del self.subscriptions[key]
+
     def __setitem__(self, key, value):
-        if key in self:
-            self._removeSource(key)
+        source = self[key] if key in self else None
         super().__setitem__(key, value)
+        if source is not None:
+            self._removeSource(key, source)
 
     def __delitem__(self, key):
-        if key in self:
-            self._removeSource(key)
+        source = self[key] if key in self else None
         super().__delitem__(key)
+        if source is not None:
+            self._removeSource(key, source)
 
 
 class SdrService(object):

owrx/service/__init__.py

@@ -122,6 +122,10 @@ class ServiceHandler(SdrSourceEventClient):
         logger.debug("sdr source failed; stopping services.")
         self.stopServices()
 
+    def onShutdown(self):
+        logger.debug("sdr source is shutting down; shutting down service handler, too.")
+        self.shutdown()
+
     def onEnable(self):
         self._scheduleServiceStartup()
 

owrx/service/schedule.py

@@ -258,6 +258,9 @@ class ServiceScheduler(SdrSourceEventClient):
     def onFail(self):
         self.shutdown()
 
+    def onShutdown(self):
+        self.shutdown()
+
     def onDisable(self):
         self.cancelTimer()
 

owrx/source/__init__.py

@@ -56,6 +56,9 @@ class SdrSourceEventClient(object):
     def onFail(self):
         pass
 
+    def onShutdown(self):
+        pass
+
     def onDisable(self):
         pass
 
@@ -349,6 +352,11 @@ class SdrSource(ABC):
             if self.monitor:
                 self.monitor.join()
 
+    def shutdown(self):
+        self.stop()
+        for c in self.clients.copy():
+            c.onShutdown()
+
     def getClients(self, *args):
         if not args:
             return self.clients