public static Map<MetricName, Metric> filterMetrics(
Map<MetricName, Metric> metrics, MetricPredicate predicate) {
final Map<MetricName, Metric> result = new HashMap<MetricName, Metric>();
for (Entry<MetricName, Metric> entry : metrics.entrySet()) {
if (predicate.matches(entry.getKey(), entry.getValue())) {
result.put(entry.getKey(), entry.getValue());
}
}
return result;
}
/**
* Returns a grouped and sorted map of all registered metrics which match then given {@link
* MetricPredicate}.
*
* @param predicate a predicate which metrics have to match to be in the results
* @return all registered metrics which match {@code predicate}, sorted by name
*/
public SortedMap<String, SortedMap<MetricName, Metric>> getGroupedMetrics(
MetricPredicate predicate) {
final SortedMap<String, SortedMap<MetricName, Metric>> groups =
new TreeMap<String, SortedMap<MetricName, Metric>>();
for (Map.Entry<MetricName, Metric> entry : metrics.entrySet()) {
final String qualifiedTypeName = entry.getKey().getGroup() + "." + entry.getKey().getType();
if (predicate.matches(entry.getKey(), entry.getValue())) {
final String scopedName;
if (entry.getKey().hasScope()) {
scopedName = qualifiedTypeName + "." + entry.getKey().getScope();
} else {
scopedName = qualifiedTypeName;
}
SortedMap<MetricName, Metric> group = groups.get(scopedName);
if (group == null) {
group = new TreeMap<MetricName, Metric>();
groups.put(scopedName, group);
}
group.put(entry.getKey(), entry.getValue());
}
}
return Collections.unmodifiableSortedMap(groups);
}
public static Map<String, Map<MetricName, Metric>> sortAndFilterMetrics(
Map<MetricName, Metric> metrics, MetricPredicate predicate) {
final Map<String, Map<MetricName, Metric>> sortedMetrics =
new TreeMap<String, Map<MetricName, Metric>>();
for (Entry<MetricName, Metric> entry : metrics.entrySet()) {
final String qualifiedTypeName = entry.getKey().getGroup() + "." + entry.getKey().getType();
if (predicate.matches(entry.getKey(), entry.getValue())) {
final String scopedName;
if (entry.getKey().hasScope()) {
scopedName = qualifiedTypeName + "." + entry.getKey().getScope();
} else {
scopedName = qualifiedTypeName;
}
Map<MetricName, Metric> subMetrics = sortedMetrics.get(scopedName);
if (subMetrics == null) {
subMetrics = new TreeMap<MetricName, Metric>();
sortedMetrics.put(scopedName, subMetrics);
}
subMetrics.put(entry.getKey(), entry.getValue());
}
}
return sortedMetrics;
}