Commit ac6b8be4 authored by Valentin Valls's avatar Valentin Valls
Browse files

Allow to decode more than EndScanEvent

parent 6c13d349
......@@ -23,3 +23,8 @@ class EndScanEvent(streaming_events.EndEvent):
:returns EndScanEvent:
return cls(raw=events[0][1])
def description(self):
"""Used to generate EventData description"""
return self.exception
......@@ -9,6 +9,7 @@ from bliss.common.greenlet_utils import AllowKill
from import DataNodeContainer
from import ChannelDataNode
from import LimaImageChannelDataNode
from bliss.config.streaming_events import StreamEvent
from import Event, EventType, EventData, EndScanEvent
from bliss.config import settings
......@@ -16,6 +17,10 @@ from bliss.config import settings
class ScanNode(DataNodeContainer):
_NODE_TYPE = "scan"
_EVENT_TYPE_MAPPING = {EndScanEvent.TYPE.decode("ascii"): EventType.END_SCAN}
"""Mapping from event name to EventType
def __init__(self, name, **kwargs):
super().__init__(self._NODE_TYPE, name, **kwargs)
self._sync_stream = self._create_stream("data")
......@@ -41,6 +46,15 @@ class ScanNode(DataNodeContainer):
def _get_event_class(self, stream_event):
stream_event = stream_event[0]
kind = stream_event[1][b"__EVENT__"]
# FIXME: Use dict instead of iteration
for event_class in self._SUPPORTED_EVENTS:
if event_class.TYPE == kind:
return event_class
raise RuntimeError("Unsupported event kind %s", kind)
def decode_raw_events(self, events):
"""Decode raw stream data
......@@ -49,11 +63,14 @@ class ScanNode(DataNodeContainer):
if not events:
return None
first_index = self._streamid_to_idx(events[0][0])
ev = EndScanEvent.merge(events)
return EventData(
first_index=first_index, data=ev.TYPE.decode(), description=ev.exception
assert len(events) == 1 # Else you are about to lose events
event = events[0]
timestamp, raw_data = event
first_index = self._streamid_to_idx(timestamp)
ev = StreamEvent.factory(raw_data)
data = type(ev).TYPE.decode()
return EventData(first_index=first_index, data=data, description=ev.description)
def get_db_names(self, **kw):
db_names = super().get_db_names(**kw)
......@@ -109,7 +126,10 @@ class ScanNode(DataNodeContainer):
if yield_events and self._included(include_filter):
with AllowKill():
yield Event(type=EventType.END_SCAN, node=self, data=data)
kind =
event_id = self._EVENT_TYPE_MAPPING[kind]
event = Event(type=event_id, node=self, data=data)
yield event
# Stop reading events from this node's streams
# and the streams of its children
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