/**
* Create a snapshot of runnable nodes.
*
* @return The snapshot.
*/
public NodeSnapshot getNodeSnapshot() {
int nodeCount = 0;
Map<String, NodeContainer> hostRunnables = new HashMap<String, NodeContainer>();
for (Map.Entry<String, NodeContainer> entry : hostToRunnableNodes.entrySet()) {
NodeContainer value = entry.getValue();
synchronized (value) {
if (!value.isEmpty()) {
hostRunnables.put(entry.getKey(), value.copy());
nodeCount += value.size();
}
}
}
Map<Node, NodeContainer> rackRunnables = new HashMap<Node, NodeContainer>();
for (Map.Entry<Node, NodeContainer> entry : rackToRunnableNodes.entrySet()) {
NodeContainer value = entry.getValue();
synchronized (value) {
if (!value.isEmpty()) {
rackRunnables.put(entry.getKey(), value.copy());
}
}
}
return new NodeSnapshot(topologyCache, hostRunnables, rackRunnables, nodeCount);
}
