虚函数与泛型的结合应用

r囧r小猫 2022-08-12 03:58 102阅读 0赞

<pre name="code" class="java">public abstract class AbstractCommonQuartzJob<T extends IQuartzCommonSIDSV> implements Job  {
    	
    	private static Logger logger = LoggerFactory.getLogger(AbstractCommonQuartzJob.class);
    
    	@Override
    	public void execute(JobExecutionContext context) throws JobExecutionException {
    		JobDataMap jobDataMap = null;
    		String provinceCode = null ;
    		Map<String,String> extendParams =  new java.util.HashMap<>();
    		if(context == null){
    			
    		} else {
    			jobDataMap = context.getJobDetail().getJobDataMap();
    			//获取设置的省分编码；
    			provinceCode = jobDataMap.getString(JobConstants.JobParam_ProvinceCode);
    			for(String key : jobDataMap.keySet()){
    				if( jobDataMap.get(key) != null){
    					extendParams.put(key,jobDataMap.getString(key));
    				}
    			}
    		}
    		
    		IQuartzCommonSIDSV sv = this.getService();
    		
    		try{
    			if(StringUtils.isEmpty(provinceCode)){
    				logger.info("定时任务开始，获取的省分编码为空,执行所有省分处理");
    				sv.dealQuartz(extendParams);
    			} else {
    				logger.info("定时任务开始，获取的省分编码列表为："+provinceCode);
    				String[] provinceCodes = provinceCode.split(JobConstants.JobParam_SPLIT);
    				sv.dealQuartzByProvinceCodes(provinceCodes,extendParams);
    			}
    		} catch(Exception e){
    			logger.error("定时任务失败!", e);
    			throw new JobExecutionException(e);
    		} finally {
    			logger.info("定时任务结束!");
    		}
    		
    	}
    	
    	/**
    	 * 获取 对应的服务；
    	 * @return
    	 * @author yugn
    	 */
    	abstract protected T getService();
    
    }

上述虚拟类

@DisallowConcurrentExecution
    public class SmsSendJob extends AbstractCommonQuartzJob<IQuartzSmsSendSIDSV> {
    	
    	@Override
    	protected IQuartzSmsSendSIDSV getService() {
    	
    		return  (IQuartzSmsSendSIDSV) QuartzContextHolder.getBean(JobConstants.SmsSendService);
    		
    	}
    
    	public static void main(String[] args) throws JobExecutionException {
    		SmsSendJob job = new SmsSendJob();
    		
    		job.execute(null);
    	}
    
    }

这是实现类

泛型和虚拟类的使用，使得业务代码被完全封装，本质类似于适配器模式，但一层虚拟函数与泛型的使用，拓展了适配器模式中继承类选择，可以看做是适配器模式的拓展。

将服务类的对象实现了配置，从配置文件读取。