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package com.yahoo.search.dispatch.searchcluster;
import com.google.common.math.Quantiles;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
public class SearchGroupsImpl implements SearchGroups {
private final Map<Integer, Group> groups;
private final double minActivedocsPercentage;
public SearchGroupsImpl(Map<Integer, Group> groups, double minActivedocsPercentage) {
this.groups = Map.copyOf(groups);
this.minActivedocsPercentage = minActivedocsPercentage;
}
@Override public Group get(int id) { return groups.get(id); }
@Override public Set<Integer> keys() { return groups.keySet();}
@Override public Collection<Group> groups() { return groups.values(); }
@Override public int size() { return groups.size(); }
@Override
public boolean isPartialGroupCoverageSufficient(Collection<Node> nodes) {
if (size() == 1)
return true;
long activeDocuments = nodes.stream().mapToLong(Node::getActiveDocuments).sum();
return isGroupCoverageSufficient(activeDocuments, medianDocumentsPerGroup());
}
public boolean isGroupCoverageSufficient(long activeDocuments, long medianDocuments) {
if (medianDocuments <= 0) return true;
double documentCoverage = 100.0 * (double) activeDocuments / medianDocuments;
return documentCoverage >= minActivedocsPercentage;
}
public long medianDocumentsPerGroup() {
if (isEmpty()) return 0;
var activeDocuments = groups().stream().map(Group::activeDocuments).toList();
return (long) Quantiles.median().compute(activeDocuments);
}
}
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