public static Map<String, String> getTopologyNodeHost(
Map<String, SupervisorInfo> supervisorMap,
Assignment existingAssignment,
Set<ResourceWorkerSlot> workers) {
// the following is that remove unused node from allNodeHost
Set<String> usedNodes = new HashSet<String>();
for (ResourceWorkerSlot worker : workers) {
usedNodes.add(worker.getNodeId());
}
// map<supervisorId, hostname>
Map<String, String> allNodeHost = new HashMap<String, String>();
if (existingAssignment != null) {
allNodeHost.putAll(existingAssignment.getNodeHost());
}
// get alive supervisorMap Map<supervisorId, hostname>
Map<String, String> nodeHost = SupervisorInfo.getNodeHost(supervisorMap);
if (nodeHost != null) {
allNodeHost.putAll(nodeHost);
}
Map<String, String> ret = new HashMap<String, String>();
for (String supervisorId : usedNodes) {
if (allNodeHost.containsKey(supervisorId)) {
ret.put(supervisorId, allNodeHost.get(supervisorId));
} else {
LOG.warn("Node " + supervisorId + " doesn't in the supervisor list");
}
}
return ret;
}
