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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
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 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 */

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

/**
 *
 * @author  nsegura
 */
import org.glassfish.j2ee.statistics.Stats;
import org.glassfish.j2ee.statistics.CountStatistic;

/** 
 * The DNS Cache caches IP addresses and DNS names. The server’s DNS cache is
 * disabled by default. A single cache entry represents a single IP address or DNS
 * name lookup
 */
public interface PWCDnsStats extends Stats {
    
    /**
     * Indicates whether the DNS cache is enabled or disable. Default is disabled.
     * @return DNS cache enabled?
     */
    public CountStatistic getFlagCacheEnabled();
    
    /** 
     * The number of current cache entries
     * @return current cache entries
     */
    public CountStatistic getCountCacheEntries();
    
    /** 
     * The maximum number of cache entries
     * @return max cache entries
     */
    public CountStatistic getMaxCacheEntries();
    
    /** 
     * The number of cache hits
     * @return cache hits
     */
    public CountStatistic getCountCacheHits();
    
    /** 
     * The number of cache misses
     * @return cache misses
     */
    public CountStatistic getCountCacheMisses();
    
    /** 
     * Returns whether asynchronic lookup is enabled. 1 if true, 0 otherwise
     * @return enabled
     */
    public CountStatistic getFlagAsyncEnabled();
    
    /** 
     * The total number of asynchronic name lookups
     * @return asyn name lookups
     */
    public CountStatistic getCountAsyncNameLookups();
    
    /** 
     * The total number of asynchronic address lookups
     * @return asyn address lookups
     */
    public CountStatistic getCountAsyncAddrLookups();
    
    /** 
     * The number of asynchronic lookups in progress
     * @return async lookups in progress
     */
    public CountStatistic getCountAsyncLookupsInProgress();
    
}