def _process_request_queue(self):
"""Process the ScriptRequestQueue and then exits.
This is run in a separate thread.
"""
LOGGER.debug("Beginning script thread")
while not self._shutdown_requested and self._request_queue.has_request:
request, data = self._request_queue.dequeue()
if request == ScriptRequest.STOP:
LOGGER.debug("Ignoring STOP request while not running")
elif request == ScriptRequest.SHUTDOWN:
LOGGER.debug("Shutting down")
self._shutdown_requested = True
elif request == ScriptRequest.RERUN:
self._run_script(data)
else:
raise RuntimeError("Unrecognized ScriptRequest: %s" % request)
# Send a SHUTDOWN event before exiting. This includes the widget values
# as they existed after our last successful script run, which the
# ReportSession will pass on to the next ScriptRunner that gets
# created.
client_state = ClientState()
client_state.query_string = self._client_state.query_string
self._widgets.marshall(client_state)
self.on_event.send(ScriptRunnerEvent.SHUTDOWN,
client_state=client_state)
def _run_script_thread(self) -> None:
"""The entry point for the script thread.
Processes the ScriptRequestQueue, which will at least contain the RERUN
request that will trigger the first script-run.
When the ScriptRequestQueue is empty, or when a SHUTDOWN request is
dequeued, this function will exit and its thread will terminate.
"""
assert self._is_in_script_thread()
LOGGER.debug("Beginning script thread")
# Create and attach the thread's ScriptRunContext
ctx = ScriptRunContext(
session_id=self._session_id,
enqueue=self._enqueue,
query_string=self._client_state.query_string,
session_state=self._session_state,
uploaded_file_mgr=self._uploaded_file_mgr,
)
add_script_run_ctx(threading.current_thread(), ctx)
while not self._shutdown_requested and self._request_queue.has_request:
request, data = self._request_queue.dequeue()
if request == ScriptRequest.STOP:
LOGGER.debug("Ignoring STOP request while not running")
elif request == ScriptRequest.SHUTDOWN:
LOGGER.debug("Shutting down")
self._shutdown_requested = True
elif request == ScriptRequest.RERUN:
self._run_script(data)
else:
raise RuntimeError("Unrecognized ScriptRequest: %s" % request)
# Send a SHUTDOWN event before exiting. This includes the widget values
# as they existed after our last successful script run, which the
# AppSession will pass on to the next ScriptRunner that gets
# created.
client_state = ClientState()
client_state.query_string = ctx.query_string
widget_states = self._session_state.as_widget_states()
client_state.widget_states.widgets.extend(widget_states)
self.on_event.send(self,
event=ScriptRunnerEvent.SHUTDOWN,
client_state=client_state)
def _run_script_thread(self) -> None:
"""The entry point for the script thread.
Processes the ScriptRequestQueue, which will at least contain the RERUN
request that will trigger the first script-run.
When the ScriptRequestQueue is empty, or when a SHUTDOWN request is
dequeued, this function will exit and its thread will terminate.
"""
assert self._is_in_script_thread()
LOGGER.debug("Beginning script thread")
# Create and attach the thread's ScriptRunContext
ctx = ScriptRunContext(
session_id=self._session_id,
enqueue=self._enqueue_forward_msg,
query_string=self._client_state.query_string,
session_state=self._session_state,
uploaded_file_mgr=self._uploaded_file_mgr,
)
add_script_run_ctx(threading.current_thread(), ctx)
request = self._requests.on_scriptrunner_ready()
while request.type == ScriptRequestType.RERUN:
# When the script thread starts, we'll have a pending rerun
# request that we'll handle immediately. When the script finishes,
# it's possible that another request has come in that we need to
# handle, which is why we call _run_script in a loop.
self._run_script(request.rerun_data)
request = self._requests.on_scriptrunner_ready()
assert request.type == ScriptRequestType.STOP
# Send a SHUTDOWN event before exiting. This includes the widget values
# as they existed after our last successful script run, which the
# AppSession will pass on to the next ScriptRunner that gets
# created.
client_state = ClientState()
client_state.query_string = ctx.query_string
widget_states = self._session_state.get_widget_states()
client_state.widget_states.widgets.extend(widget_states)
self.on_event.send(self,
event=ScriptRunnerEvent.SHUTDOWN,
client_state=client_state)