/**
* Trim the topology definition for storing into state manager. This is because the user generated
* spouts and bolts might be huge.
*
* @return trimmed topology
*/
public TopologyAPI.Topology trimTopology(TopologyAPI.Topology topology) {
// create a copy of the topology physical plan
TopologyAPI.Topology.Builder builder = TopologyAPI.Topology.newBuilder().mergeFrom(topology);
// clear the state of user spout java objects - which can be potentially huge
for (TopologyAPI.Spout.Builder spout : builder.getSpoutsBuilderList()) {
spout.getCompBuilder().clearJavaObject();
}
// clear the state of user spout java objects - which can be potentially huge
for (TopologyAPI.Bolt.Builder bolt : builder.getBoltsBuilderList()) {
bolt.getCompBuilder().clearJavaObject();
}
return builder.build();
}
