package com.dy.common.mw.protocol;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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public class ProtocolCach {
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//本系统中，Driver在单线程中运行，所以只用一个实例
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private static final HashMap<String, Driver> drivers = new HashMap<>() ;
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//注解与处理类的映射
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private static final HashMap<String, AnnotationDriverVo> driverMap = new HashMap<>() ;
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private static final HashMap<String, AnnotationPrefixedDataAvailableVo> prefixedDataAvailableMap = new HashMap<>() ;
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private static final HashMap<String, AnnotationOnLineVo> onLineMap = new HashMap<>() ;
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/**
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* 在单线程环境中运行
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* 通过协议驱动的类名，得到类单例
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* @param protocolName 协议名称
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* @return 驱动
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* @throws Exception 异常
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*/
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public static Driver getDriver(String protocolName) throws Exception{
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Driver dri = drivers.get(protocolName);
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if(dri == null){
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AnnotationDriverVo vo = driverMap.get(protocolName) ;
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if(vo != null && vo.clazz != null){
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dri = (Driver)vo.clazz.getDeclaredConstructor().newInstance();
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//dri = (Driver)vo.clazz.newInstance() ;
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drivers.put(protocolName, dri) ;
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}
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}
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return dri ;
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}
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/**
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* 得到驱动的数量，即中间件支持的协议数量
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* @return 驱动总数
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*/
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public static int driverCount(){
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if(drivers.size() == 0){
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return 0 ;
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}else{
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return drivers.size() ;
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}
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}
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/**
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* 得到第一个驱动
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* @return 驱动
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*/
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public static Driver getFirstDriver(){
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Driver dri = null ;
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if(drivers.size() > 0){
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Map.Entry<String, Driver> ent = drivers.entrySet().iterator().next() ;
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dri = ent.getValue();
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}
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return dri ;
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}
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/**
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* 得到所有协议名称
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* @return 协议名称集合
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*/
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@SuppressWarnings("unused")
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public static List<String> getProtocolList() {
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return new ArrayList<>(driverMap.keySet()) ;
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}
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protected static HashMap<String, AnnotationDriverVo> getDriverMap() {
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return driverMap;
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}
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protected static HashMap<String, AnnotationPrefixedDataAvailableVo> getPrefixedDataAvailableMap() {
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return prefixedDataAvailableMap;
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}
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protected static HashMap<String, AnnotationOnLineVo> getOnLineMap() {
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return onLineMap;
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}
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public static void main(String[] args){
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HashMap<String, Integer> mp = new HashMap<>() ;
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mp.put("a1", 1) ;
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mp.put("a2", 2) ;
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List<String> list = new ArrayList<>(mp.keySet()) ;
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System.out.println(list);
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}
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}
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