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/*
 * Copyright (c) 2000, 2017 Oracle and/or its affiliates. All rights reserved.
 * Copyright 2021 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.messaging.jmq.util;

import java.io.Serializable;

/**
 * This class represents metric performance data that is derived from MetricCounters
 */

public class MetricData implements Serializable {

    private static final long serialVersionUID = -2945599923640322420L;
    public MetricCounters totals = null;
    public MetricCounters rates = null;

    public long totalMemory;
    public long freeMemory;

    public long timestamp;

    public int nConnections;

    public MetricData() {
        totals = new MetricCounters();
        rates = new MetricCounters();
        reset();
    }

    /**
     * Reset counters to 0
     */
    public synchronized void reset() {

        totals.reset();
        rates.reset();

        timestamp = 0;
        totalMemory = 0;
        freeMemory = 0;
        nConnections = 0;
    }

    public synchronized void setTotals(MetricCounters counters) {
        totals.reset();
        totals.update(counters);
    }

    public synchronized void setRates(MetricCounters counters) {
        rates.reset();
        rates.update(counters);
    }

    @Override
    public String toString() {
        String s =

                "Connections: " + nConnections + "    JVM Heap: " + totalMemory + " bytes (" + freeMemory + " free)" + " Threads: " + totals.threadsActive
                        + " (" + totals.threadsLowWater + "-" + totals.threadsHighWater + ")" + "\n" + "      In: " + totals.messagesIn + " msgs ("
                        + totals.messageBytesIn + " bytes)  " + totals.packetsIn + " pkts (" + totals.packetBytesIn + " bytes)\n" + "     Out: "
                        + totals.messagesOut + " msgs (" + totals.messageBytesOut + " bytes)  " + totals.packetsOut + " pkts (" + totals.packetBytesOut
                        + " bytes)\n" + " Rate In: " + rates.messagesIn + " msgs/sec (" + rates.messageBytesIn + " bytes/sec)  " + rates.packetsIn
                        + " pkts/sec (" + rates.packetBytesIn + " bytes/sec)\n" + "Rate Out: " + rates.messagesOut + " msgs/sec (" + rates.messageBytesOut
                        + " bytes/sec)  " + rates.packetsOut + " pkts/sec (" + rates.packetBytesOut + " bytes/sec)";

        return s;
    }
}