DebugLogStopwatch.java

package util;

import org.apache.log4j.Logger;
import org.springframework.util.StopWatch;

public class DebugLogStopwatch implements AutoCloseable {

    Logger logger;
    StopWatch stopwatch;

    public DebugLogStopwatch(Logger log, String label) {
        logger = log;
        stopwatch = new StopWatch(label);
        stopwatch.start();
    }

    @Override
    public void close() throws Exception {
        stopwatch.stop();
        if (logger.isDebugEnabled()) {
            logger.debug(stopwatch.prettyPrint());
        }
    }
}

/* Usage:

        try (DebugLogStopwatch sw = new DebugLogStopwatch(logger, "label")) {
            ...
        }
*/