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package com.sun.enterprise.web.connector.grizzly;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * Class collecting keep-alive statistics.
 *
 * There is one instance of this class per HTTP listener (ie., SelectorThread).
 * Each instance exposes its stats as an MBean with an object name of the
 * form ":type=KeepAlive,name=http", where  is replaced
 * with the port number of the associated HTTP listener.
 * 
 * @author Jan Luehe
 */
public class KeepAliveStats {

    private AtomicInteger countConnections = new AtomicInteger();
    private int maxConnections;
    private AtomicInteger countHits = new AtomicInteger();
    private AtomicInteger countFlushes = new AtomicInteger();
    private AtomicInteger countRefusals = new AtomicInteger();
    private AtomicInteger countTimeouts = new AtomicInteger();
    private int secondsTimeouts;


    /** 
     * Gets the number of connections in keep-alive mode.
     * 
     * @return Number of connections in keep-alive mode
     */    
    public int getCountConnections() {
        return countConnections.get();
    }

    
    /** 
     * Increments the number of connections in keep-alive mode.
     */    
    public void incrementCountConnections() {
        countConnections.incrementAndGet();
    }


    /**
     * Increments the number of connections in keep-alive mode.
     */
    public void decrementCountConnections() {
        countConnections.decrementAndGet();
    }

    /** 
     * Sets the maximum number of concurrent connections in keep-alive mode.
     *
     * @param maxConnections Maximum number of concurrent connections in
     * keep-alive mode.
     */    
    public void setMaxConnections(int maxConnections) {
        this.maxConnections = maxConnections;
    }  


    /** 
     * Gets the maximum number of concurrent connections in keep-alive mode.
     *
     * @return Maximum number of concurrent connections in keep-alive mode
     */    
    public int getMaxConnections() {
        return maxConnections;
    }

    
    /** 
     * Gets the number of requests received by connections in keep-alive mode.
     *
     * @return Number of requests received by connections in keep-alive mode.
     */    
    public int getCountHits() {
        return countHits.get();
    }


    /** 
     * Increments the number of requests received by connections in
     * keep-alive mode.
     */    
    public void incrementCountHits() {
        countHits.incrementAndGet();
    }

    
    /** 
     * Gets the number of keep-alive connections that were closed
     *
     * @return Number of keep-alive connections that were closed
     */    
    public int getCountFlushes() {
        return countFlushes.get();
    }

    
    /** 
     * Increments the number of keep-alive connections that were closed
     */    
    public void incrementCountFlushes() {
        countFlushes.incrementAndGet();
    }


    /** 
     * Gets the number of keep-alive connections that were rejected.
     *
     * @return Number of keep-alive connections that were rejected.
     */    
    public int getCountRefusals() {
        return countRefusals.get();
    }
    

    /** 
     * Increments the number of keep-alive connections that were rejected.
     */    
    public void incrementCountRefusals() {
        countRefusals.incrementAndGet();
    }


    /** 
     * Gets the number of keep-alive connections that timed out.
     *
     * @return Number of keep-alive connections that timed out.
     */    
    public int getCountTimeouts() {
        return countTimeouts.get();
    }

    
    /** 
     * Increments the number of keep-alive connections that timed out.
     */    
    public void incrementCountTimeouts() {
        countTimeouts.incrementAndGet();
    }


    /** 
     * Sets the number of seconds before a keep-alive connection that has
     * been idle times out and is closed.
     *
     * @param timeout Keep-alive timeout in number of seconds
     */    
    public void setSecondsTimeouts(int timeout) {
        secondsTimeouts = timeout;
    }


    /** 
     * Gets the number of seconds before a keep-alive connection that has
     * been idle times out and is closed.
     *
     * @return Keep-alive timeout in number of seconds
     */    
    public int getSecondsTimeouts() {
        return secondsTimeouts;
    } 
}