@Override
public void pollSubNodes() {
// System.out.println("Before SubNodesPolled: Load=" + networkLoad + "hops, subNodeStatusMap: "
// + subNodesStatusMap.entrySet().toString());
Datacentre dc = World.getInstance().getDatacentre(location.dc());
// poll each sub-node for latest status
for (Map.Entry<Integer, Boolean> entry : subNodesStatusMap.entrySet()) {
// Server s = dc.getServer(entry.getKey());
// System.out.println(s.getStatus());
entry.setValue(dc.getServer(entry.getKey()).isAlive()); // poll current server status
PartialIP node_ip = new PartialIP(dc.getServer(entry.getKey()).getIP());
int hops =
2
* PartialIP.navigatePointToPoint(
location, node_ip); // x2 for round trip (request/response)
networkLoad += hops;
}
// System.out.println("After SubNodesPolled: Load=" + networkLoad + "hops, subNodeStatusMap: "
// + subNodesStatusMap.entrySet().toString());
}
/**
* DatacentrePoller periodically polls and records the status of all nodes in the network, making
* this status information available for other nodes on the network to enquire.
*
* @param location - the network location of the DatacentrePoller
*/
public DatacentrePoller(PartialIP location) {
super(location);
logger.info("Constructing new DCPoller, IP(" + location + ")");
Datacentre dc = World.getInstance().getDatacentre(location.dc());
int[] serverIDs = dc.getServerIDs();
subNodesStatusMap = new HashMap<Integer, Boolean>();
logger.debug("ServerIDs: " + Arrays.toString(serverIDs));
int firstNodeID = serverIDs[0];
int nodeIndex;
// initial set up of subNodesMap
for (int i = 0; i < serverIDs.length; i++) {
nodeIndex = serverIDs[i] - firstNodeID;
subNodesStatusMap.put(nodeIndex, dc.getServer(nodeIndex).isAlive());
PartialIP node_ip = new PartialIP(dc.getServer(nodeIndex).getIP());
int hops =
2
* PartialIP.navigatePointToPoint(
location, node_ip); // x2 for round trip (request/response)
networkLoad += hops;
}
logger.info(
"Load="
+ networkLoad
+ "hops, Created new DCPoller with subNodeStatusMap: "
+ subNodesStatusMap.entrySet().toString());
}