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User friendly map toString in StatisticsUtils (#2203)

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Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>
This commit is contained in:
Avgustin Marinov
2025-01-20 13:31:31 +02:00
committed by GitHub
parent 1f71d6ddb0
commit 25e45d5825
4 changed files with 27 additions and 6 deletions
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27
hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/utils/StatisticsUtils.java
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@@ -26,11 +26,12 @@ import org.springframework.util.ObjectUtils;
/**
* (Experimental) Utility class to get some statistics.
* It's main purpose is to be used for debugging / testing (performance) purposes.
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class StatisticsUtils {
private static final ThreadLocal<Map<String, Double>> LAST_COUNTERS = ThreadLocal.withInitial(HashMap::new);
private static final ThreadLocal<Map<String, Double>> LAST_COUNTERS = ThreadLocal.withInitial(MapUFToString::new);
// for test purposes we may want to flush the statistics and to get diff from the last get int THIS thread
public static Map<String, Double> diff() {
@@ -60,7 +61,7 @@ public class StatisticsUtils {
Statistics.flush();
final Map<String, Double> counters = new HashMap<>();
final Map<String, Double> counters = new MapUFToString();
meterRegistry.forEachMeter(m -> {
final Meter.Id id = m.getId();
if (id.getName().startsWith(Statistics.METER_PREFIX)) {
@@ -78,7 +79,7 @@ public class StatisticsUtils {
if (!ObjectUtils.isEmpty(tags)) {
key.append(" [");
tags.forEach(tag -> key.append(tag.getKey()).append('=').append(tag.getValue()).append(", "));
key.setLength(key.length() - 2);
key.setLength(key.length() - 2); // remove the last ", "
key.append(']');
}
counters.put(key.toString(), value);
@@ -88,4 +89,24 @@ public class StatisticsUtils {
LAST_COUNTERS.set(counters);
return counters;
}
// Map with user-friendly toString, sorted and without the last ", "
private static class MapUFToString extends HashMap<String, Double> {
@Override
public String toString() {
if (isEmpty()) {
return "{}";
}
final StringBuilder sb = new StringBuilder("{");
entrySet().stream()
.sorted()
.forEach(e -> sb.append(e.getKey()).append(": ").append(e.getValue()).append(", "));
sb.setLength(sb.length() - 2); // remove the last ", "
sb.append("}");
return sb.toString();
}
}
}