Counter.java

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/* *********************************************************************** *
 * project: org.matsim.*
 * Counter.java
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 * copyright       : (C) 2008 by the members listed in the COPYING,        *
 *                   LICENSE and WARRANTY file.                            *
 * email           : info at matsim dot org                                *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *   See also COPYING, LICENSE and WARRANTY file                           *
 *                                                                         *
 * *********************************************************************** */

package org.matsim.core.utils.misc;

import java.util.concurrent.atomic.AtomicLong;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public final class Counter {
    private final String prefix;
    private final String suffix;
    private final int multiplier;
    private final AtomicLong counter = new AtomicLong(0);
    private final AtomicLong nextCounter = new AtomicLong(1);
    private static final Logger log = LogManager.getLogger(Counter.class);

    public Counter(final String prefix) {
        this( prefix , "" );
    }
    
    public Counter(final String prefix, final String suffix ) {
        this( prefix, suffix, 2 ) ;
    }
    public Counter(final String prefix, final String suffix, int multiplier) {
        this.prefix = prefix;
        this.suffix = suffix;
        this.multiplier = multiplier;
    }

    public void incCounter() {
        long i = this.counter.incrementAndGet();
        long n = this.nextCounter.get();
        if ((i >= n) && (this.nextCounter.compareAndSet(n, n*multiplier))) {
            log.info(this.prefix + n + this.suffix);
        }
    }

    public void printCounter() {
        log.info(this.prefix + this.counter.get() + this.suffix);
    }

    public long getCounter() {
        return this.counter.get();
    }

    public void reset() {
        this.counter.set(0);
        this.nextCounter.set(1);
    }
}