def get_topology_builder():
builder = TopologyBuilder();
builder.setSpout("words", WordSpout(), 4)
builder.setBolt("exclaim1", ExclamationBolt(), 2).shuffleGrouping("words")
builder.setBolt("exclaim2", ExclamationBolt(), 2).shuffleGrouping("exclaim1")
return builder
def get_topology_builder():
# FIXME parallelism numbers are completely arbitrary!
# however the parallelism is greater than 1 so we can see that proper isolation is being performed
builder = TopologyBuilder();
builder.setSpout("maas-spout", MonitoringSpout(), 4) # Read from Kafka the monitoring data. Or a file to simulate.
builder.setSpout("scheduler-spout", SchedulerSpout(), 4) # Pull in scheduling policy
builder.setBolt("lookup-asg-bolt", LookupASGBolt(), 2)\
.shuffleGrouping("maas-spout")
builder.setBolt("policy-bolt", PolicyBolt(), 4)\
.fieldsGrouping("lookup-asg-bolt", Fields(["asg"]))\
.fieldsGrouping("scheduler-spout", Fields(["asg"]))\
# Write out our fake policy decisions
builder.setBolt("log-policy", LogPolicyBolt()).globalGrouping("policy-bolt")
return builder