code: @Override
      public boolean contains(Class arg0, Object arg1)
      {
          if(isAlive())
          {
              return (ehcache.get(arg1) != null);
          }
          
          return false;
      }
docs: /*
  (non-Javadoc)
  
  @see javax.persistence.Cache#contains(java.lang.Class, java.lang.Object)