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// Portions Copyright [2019] Payara Foundation and/or affiliates

package com.sun.enterprise.admin.monitor.stats;

import org.glassfish.j2ee.statistics.CountStatistic;
import org.glassfish.j2ee.statistics.Stats;

/** 
 * ConnectionQueue information shows the number of sessions in the queue
 * and the average delay before the connection is accepted
 * @author  nsegura
 */
public interface PWCConnectionQueueStats extends Stats {

    /** 
     * Gets the ID of the connection queue
     *
     * @return The ID of the connection queue
     */
    public StringStatistic getId();

    /**
     * Gets the total number of connections that have been accepted.
     *
     * @return Total number of connections that have been accepted.
     */    
    public CountStatistic getCountTotalConnections();

    /**
     * Gets the number of connections currently in the queue
     *
     * @return Number of connections currently in the queue
     */    
    public CountStatistic getCountQueued();

    /**
     * Gets the largest number of connections that were in the queue
     * simultaneously.
     *
     * @return Largest number of connections that were in the queue
     * simultaneously
     */    
    public CountStatistic getPeakQueued();

    /**
     * Gets the maximum size of the connection queue
     *
     * @return Maximum size of the connection queue
     */    
    public CountStatistic getMaxQueued();

    /** 
     * Gets the number of times the queue has been too full to accommodate
     * a connection
     *
     * @return Number of times the queue has been too full to accommodate
     * a connection
     */    
    public CountStatistic getCountOverflows();

    /** 
     * Gets the total number of connections that have been queued.
     *
     * A given connection may be queued multiple times, so
     * counttotalqueued may be greater than or equal to
     * counttotalconnections.
     *
     * @return Total number of connections that have been queued
     */        
    public CountStatistic getCountTotalQueued();

    /**
     * Gets the total number of ticks that connections have spent in the
     * queue.
     * 
     * A tick is a system-dependent unit of time.
     *
     * @return Total number of ticks that connections have spent in the
     * queue
     */    
    public CountStatistic getTicksTotalQueued();

    /** 
     * Gets the average number of connections queued in the last 1 minute
     *
     * @return Average number of connections queued in the last 1 minute
     */    
    public CountStatistic getCountQueued1MinuteAverage();

    /** 
     * Gets the average number of connections queued in the last 5 minutes
     *
     * @return Average number of connections queued in the last 5 minutes
     */    
    public CountStatistic getCountQueued5MinuteAverage();

    /** 
     * Gets the average number of connections queued in the last 15 minutes
     *
     * @return Average number of connections queued in the last 15 minutes
     */    
    public CountStatistic getCountQueued15MinuteAverage();
    
}