package com.dy.rtuMw.server.mqtt;
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import com.dy.common.mw.protocol4Mqtt.MqttPubMsg;
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import com.dy.common.mw.protocol4Mqtt.MqttSubMsg;
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import com.dy.common.queue.Node;
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import com.dy.common.queue.Queue;
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import com.dy.rtuMw.server.ServerProperties;
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/**
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* @Author: liurunyu
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* @Date: 2025/6/4 17:24
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* @Description
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*/
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public class MqttPubMsgCache {
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//TCP下行命令缓存队列
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private static Queue cacheQueue = new Queue("mqttPubMsgCache") ;
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private static MqttPubMsgCache instance = new MqttPubMsgCache() ;
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private MqttPubMsgCache(){
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cacheQueue.setLimit(ServerProperties.cacheUpDownDataWarnCount, ServerProperties.cacheUpDownDataMaxCount);
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}
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public static MqttPubMsgCache getInstance(){
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return instance ;
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}
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public static Integer info(){
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Integer comTotalDown = 0 ;//缓存的下行命令总数
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MqttPubMsgNode obj ;
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Node node = cacheQueue.getFirstNode() ;
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while(node != null && node.obj != null){
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obj = (MqttPubMsgNode)node.obj;
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if(!obj.onceReceivedResult){
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comTotalDown ++ ;
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}
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}
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return comTotalDown ;
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}
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/**
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* 缓存命令
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* @param result
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* @throws Exception
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*/
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public static void cacheCommand(MqttPubMsg result) throws Exception{
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if(result != null){
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cacheQueue.pushHead(new MqttPubMsgNode(result));
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}
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}
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/**
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* 匹配命令结果
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* @param subMsg
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* @return
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*/
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public static MqttPubMsg matchFromHead(MqttSubMsg subMsg){
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MqttPubMsg pubMsg = null ;
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MqttPubMsgNode obj = null ;
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Node node = cacheQueue.getFirstNode() ;
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while(node != null && node.obj != null){
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obj = (MqttPubMsgNode)node.obj;
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pubMsg = obj.result ;
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if(pubMsg != null
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&& subMsg.subMsgMatchPubMsg(pubMsg)){
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obj.onceReceivedResult = true ;//标识已经收到命令结果
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return pubMsg;
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}else{
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node = node.next ;
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}
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}
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return null ;
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}
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/**
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* 匹配命令结果
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* @param subMsg
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* @return
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*/
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public static MqttPubMsg matchFromTail(MqttSubMsg subMsg){
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MqttPubMsg pubMsg = null ;
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MqttPubMsgNode obj = null ;
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Node node = cacheQueue.getLastNode() ;
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while(node != null && node.obj != null){
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obj = (MqttPubMsgNode)node.obj;
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pubMsg = obj.result ;
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if(pubMsg != null
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&& subMsg.subMsgMatchPubMsg(pubMsg)){
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obj.onceReceivedResult = true ;//标识已经收到命令结果
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return pubMsg;
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}else{
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node = node.pre ;
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}
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}
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return null ;
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}
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/**
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* 得到第一个节点
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* @return
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*/
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public static Node getFirstQueueNode(){
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return cacheQueue.getFirstNode() ;
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}
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/**
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* 得到最后一个节点
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* @return
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*/
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public static Node getLastQueueNode(){
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return cacheQueue.getLastNode() ;
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}
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/**
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* 移除节点
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* @param node
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*/
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public static void removeNode(Node node){
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cacheQueue.remove(node);
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}
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/**
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* 缓存的节点数
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* @Return 缓存节点数
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*/
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public static Integer size(){
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return cacheQueue.size() ;
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}
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}
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