question: protected void init ( JsonValue config ) { ClusterConfig clstrCfg = new ClusterConfig ( config ) ; instanceId = clstrCfg . getInstanceId ( ) ; if ( null == instanceId || instanceId . isEmpty ( ) || PropertyUtil . containsProperty ( instanceId , NODE_ID ) ) { throw new IllegalStateException ( "No property of '" + NODE_ID + "' could be found in configuration." ) ; } clusterConfig = clstrCfg ; if ( clusterConfig . isEnabled ( ) ) { enabled = true ; clusterManagerThread = new ClusterManagerThread ( clusterConfig . getInstanceCheckInInterval ( ) , clusterConfig . getInstanceCheckInOffset ( ) ) ; } }
target:  Initializes the Cluster Manager configuration