34 lines
984 B
Java
34 lines
984 B
Java
package ex7;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.atomic.LongAdder;
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public final class Profiler {
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private static final Map<MonitorEntry, LongAdder> monitorToAccessCount = new ConcurrentHashMap<>();
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static {
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Runtime.getRuntime().addShutdownHook(new Thread(() -> {
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for (final var entry : monitorToAccessCount.entrySet()) {
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System.out.printf("%d - %s - #Locks: %d%n",
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entry.getKey().monitorHashCode(),
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entry.getKey().name(),
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entry.getValue().intValue()
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);
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}
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}));
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}
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private Profiler() {
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}
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public static void countMonitorAccess(final Object obj) {
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final MonitorEntry monitorEntry = new MonitorEntry(obj.hashCode(), obj.getClass().getName());
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monitorToAccessCount.computeIfAbsent(monitorEntry, k -> new LongAdder()).increment();
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}
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}
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