package com.dy.rtuMw.server.mqtt;

import com.dy.common.queue.Node;
import com.dy.common.queue.Queue;
import com.dy.rtuMw.server.ServerProperties;

/**
 * @Author: liurunyu
 * @Date: 2025/6/5 15:05
 * @Description
 */
public class MqttComResultCache {

    //TCP下行命令缓存队列
    private static Queue cacheQueue = new Queue("MqttComResultCache") ;

    private static MqttComResultCache instance = new MqttComResultCache() ;

    private MqttComResultCache(){
        cacheQueue.setLimit(ServerProperties.cacheUpDownDataWarnCount, ServerProperties.cacheUpDownDataMaxCount);
    }

    public static MqttComResultCache getInstance(){
        return instance ;
    }

    /**
     * 缓存节点
     * @param node node
     * @throws Exception 异常
     */
    public static void cacheMqttComResult(MqttComResultNode node) throws Exception{
        if(node != null && node.obj != null){
            cacheQueue.pushHead(node);
        }
    }

    /**
     * 得到第一个节点
     * @return Node
     */
    public static Node getFirstQueueNode(){
        return cacheQueue.getFirstNode() ;
    }

    /**
     * 得到最后一个节点
     * @return Node
     */
    public static Node getLastQueueNode(){
        return cacheQueue.getLastNode() ;
    }

    /**
     * 移除节点
     * @param node
     */
    public static void removeNode(Node node){
        cacheQueue.remove(node);
    }

    /**
     * 缓存的节点数
     * @Return 缓存节点数
     */
    public static Integer size(){
        return cacheQueue.size() ;
    }
}