def emit(self, values, stream=None, id=None, direct_task=None, need_task_ids=False):
"""Emit a tuple"""
msg = {"command": "emit", "tuple": values, "need_task_ids": need_task_ids}
if id is not None:
msg["id"] = id
if stream is not None:
msg["stream"] = stream
if direct_task is not None:
msg["task"] = direct_task
ipc.write(msg)
if need_task_ids:
return ipc.read()
def run(self):
# Init IPC to get conf info and then init bolt
self.conf, self.context = ipc.initialize()
self.initialize(self.conf, self.context)
# Synchronous loop to process incoming messages.
# Unlike Bolts, this doesn't need to be threaded or evented because
# spouts get messages in-order
# See: https://github.com/nathanmarz/storm/wiki/Multilang-protocol#spouts
try:
while True:
msg = ipc.read()
command = msg["command"]
log.info("command: %s", command)
if command == "next":
self.next_tuple()
elif command == "ack":
self.ack(msg["id"])
elif command == "fail":
self.fail(msg["id"])
ipc.send_sync()
except Exception, e:
self.report_exception("E_SPOUTFAILED", e)
log.exception("Caught exception in Spout.run: %s", str(e))
