package com.dy.common.mw.protocol;
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import java.util.ArrayList;
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import java.util.Collection;
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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 HashMap<String, Driver> drivers = new HashMap<String, Driver>() ;
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//注解与处理类的映射
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private static HashMap<String, AnnotationDriverVo> driverMap = new HashMap<String, AnnotationDriverVo>() ;
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private static HashMap<String, AnnotationPrefixedDataAvailableVo> prefixedDataAvailableMap = new HashMap<String, AnnotationPrefixedDataAvailableVo>() ;
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private static HashMap<String, AnnotationOnLineVo> onLineMap = new HashMap<String, AnnotationOnLineVo>() ;
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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
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* @return
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* @throws Exception
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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.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
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*/
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public static int driverCount(){
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if(drivers == null || 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
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*/
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public static Driver getFirstDriver() throws Exception{
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Driver dri = null ;
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if(drivers != null && 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
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*/
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public static List<String> getProtocolList() {
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List<String> list = new ArrayList<String>() ;
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Collection<String> col = driverMap.keySet() ;
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for(String pname : col){
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list.add(pname) ;
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}
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return list;
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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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}
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