net.lenni0451.commons.debugging.MethodCallCounter Maven / Gradle / Ivy

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package net.lenni0451.commons.debugging;

import lombok.experimental.UtilityClass;

/**
 * This class can be used to count method calls per second.
 */
@UtilityClass
public class MethodCallCounter {

    private static long lastReset = System.currentTimeMillis();
    private static long calls = 0;

    /**
     * Call this method to count the calls.

     * This method will print the calls every second into {@link System#err}.
     */
    public static void call() {
        if (System.currentTimeMillis() - lastReset > 1000) {
            System.err.println("MethodCallCounter: " + calls + "/s");
            lastReset = System.currentTimeMillis();
            calls = 0;
        }
        calls++;
    }

}