spring service中增加线程池

@Service("codBillingSyncService")
public class CodBillingSyncServiceImpl implements ICodBillingSyncService {

/**
  * 用于管理线程的线程池
  */
 static Integer corePoolSize = Integer.parseInt(Property.getProperty("COD_TO_BIL_COREPOOLSIZE"));
 static Integer maximumPoolSize = Integer.parseInt(Property.getProperty("COD_TO_BIL_MAXIMUMPOOLSIZE"));
 static Integer keepaliveTime = Integer.parseInt(Property.getProperty("COD_TO_BIL_KEEPALIVETIME"));
 static Integer workqueueSize = Integer.parseInt(Property.getProperty("COD_TO_BIL_WORKQUEUESIZE"));
 private static ThreadPoolExecutor exec = new ThreadPoolExecutor(
   corePoolSize, maximumPoolSize, keepaliveTime,
   TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(
     workqueueSize), new ThreadPoolExecutor.CallerRunsPolicy());

@Override
 public void sendCodInfoToBillingReal(final OfflineBusiness business,
   final BusinessTypeToBil bt, final ReceiveTypeToBil rt,
   final TradeTypeToBil tt) {
  final CodToBil ctb = OrderUtils.getCodToBil(business, bt, rt, tt);
  ctb.setSendStatus(SendStatus.N);
  codBillingSyncService.createCodToBil(ctb);
  
  // 如果线程池未满，或缓存队列未满，则执行以下代码.
  synchronized (exec) {
   if (exec.getPoolSize() < exec.getMaximumPoolSize() || exec.getQueue().size() < workqueueSize) {
    // 执行线程
    exec.execute(new Runnable() {
     @Override
     public void run() {
      boolean f = false;// 发送是否成功的标志位
      CodTradeItem cti = null;
      // 发送MQ消息
      try {
       cti = OrderUtils.getCodTradeItem(ctb);
       codBillingSyncService.sendCodInfoToBillingReal(cti);
       f = true;
      } catch (Exception e) {
       logger.error("sendCodCancelInfoToBillingReal error: ", e);
      }
      // 新增相应的Cod入Bil记录
      try {
       if (ctb != null) {
        if (f) {
         //更新状态
         codBillingSyncService.updateSendStatus(ctb.getId(), SendStatus.Y);
        }
       }
      } catch (Exception e) {
       logger.error("createCodToBil error: ", e);
      }
     }
    });
   }
  }
 }

}