code: public Object getService(TargetMetaDef targetMetaDef) {
  
      Debug.logVerbose("[JdonFramework] --> enter getService from dynamicProxy", module);
  
      Object dynamicProxy = _proxyCache.get(targetMetaDef);
      if (dynamicProxy == null) {
        dynamicProxy = getServiceFromProxy(targetMetaDef);
        _proxyCache.put(targetMetaDef, dynamicProxy);
      }
      return dynamicProxy;
  
    }
docs: 首先从缓冲中获得代理实例，如果没有，通过动态代理生成。
  @param EJBDefinition
  @return