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17 changes: 11 additions & 6 deletions graphql_ws/gevent.py
Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,8 @@
)
from .constants import (
GQL_CONNECTION_ACK,
GQL_CONNECTION_ERROR
GQL_CONNECTION_ERROR,
GQL_COMPLETE,
)


Expand Down Expand Up @@ -81,34 +82,38 @@ def on_start(self, connection_context, op_id, params):
connection_context.request_context, params)
assert isinstance(
execution_result, Observable), "A subscription must return an observable"
execution_result.subscribe(SubscriptionObserver(
disposable = execution_result.subscribe(SubscriptionObserver(
connection_context,
op_id,
self.send_execution_result,
self.send_error,
self.on_close
self.on_complete
))
connection_context.register_operation(op_id, disposable)
except Exception as e:
self.send_error(connection_context, op_id, str(e))

def on_stop(self, connection_context, op_id):
self.unsubscribe(connection_context, op_id)

def on_complete(self, connection_context, op_id):
self.send_message(connection_context, op_id, GQL_COMPLETE)


class SubscriptionObserver(Observer):

def __init__(self, connection_context, op_id, send_execution_result, send_error, on_close):
def __init__(self, connection_context, op_id, send_execution_result, send_error, on_complete):
self.connection_context = connection_context
self.op_id = op_id
self.send_execution_result = send_execution_result
self.send_error = send_error
self.on_close = on_close
self.on_complete = on_complete

def on_next(self, value):
self.send_execution_result(self.connection_context, self.op_id, value)

def on_completed(self):
self.on_close(self.connection_context)
self.on_complete(self.connection_context, self.op_id)

def on_error(self, error):
self.send_error(self.connection_context, self.op_id, error)