public static void handleMemberStarted(InstanceStartedEvent instanceStartedEvent) { try { Topology topology = TopologyManager.getTopology(); Service service = topology.getService(instanceStartedEvent.getServiceName()); if (service == null) { log.warn(String.format("Service %s does not exist", instanceStartedEvent.getServiceName())); return; } if (!service.clusterExists(instanceStartedEvent.getClusterId())) { log.warn( String.format( "Cluster %s does not exist in service %s", instanceStartedEvent.getClusterId(), instanceStartedEvent.getServiceName())); return; } Cluster cluster = service.getCluster(instanceStartedEvent.getClusterId()); Member member = cluster.getMember(instanceStartedEvent.getMemberId()); if (member == null) { log.warn(String.format("Member %s does not exist", instanceStartedEvent.getMemberId())); return; } try { TopologyManager.acquireWriteLock(); // try update lifecycle state if (!member.isStateTransitionValid(MemberStatus.Starting)) { log.error( "Invalid State Transition from " + member.getStatus() + " to " + MemberStatus.Starting); return; } else { member.setStatus(MemberStatus.Starting); log.info("member started event adding status started"); TopologyManager.updateTopology(topology); // memberStartedEvent. TopologyEventPublisher.sendMemberStartedEvent(instanceStartedEvent); // publishing data BAMUsageDataPublisher.publish( instanceStartedEvent.getMemberId(), instanceStartedEvent.getPartitionId(), instanceStartedEvent.getNetworkPartitionId(), instanceStartedEvent.getClusterId(), instanceStartedEvent.getServiceName(), MemberStatus.Starting.toString(), null); } } finally { TopologyManager.releaseWriteLock(); } } catch (Exception e) { String message = String.format( "Could not handle member started event: [application-id] %s " + "[service-name] %s [member-id] %s", instanceStartedEvent.getApplicationId(), instanceStartedEvent.getServiceName(), instanceStartedEvent.getMemberId()); log.warn(message, e); } }