com.google.inject.internal.util.Stopwatch Maven / Gradle / Ivy

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package com.google.inject.internal.util;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Enables simple performance monitoring.
 */
public final class Stopwatch {

    private static final Logger logger = Logger.getLogger(Stopwatch.class.getName());

    private long start = System.currentTimeMillis();

    /**
     * Resets and returns elapsed time in milliseconds.
     */
    public long reset() {
        long now = System.currentTimeMillis();
        try {
            return now - start;
        } finally {
            start = now;
        }
    }

    /**
     * Resets and logs elapsed time in milliseconds.
     */
    public void resetAndLog(String label) {
        logger.log(Level.FINE, label + ": " + reset() + "ms");
    }
}