InterfaceA_EngineBasedServer.java 文件源码

public void init() throws ServletException {     

        ServletContext context = getServletContext();

        // read persistence flag from web.xml & get engine instance
        try {
            String persistOn = context.getInitParameter("EnablePersistence") ;
            boolean enablePersist = "true".equalsIgnoreCase(persistOn);

            _engine = (EngineGateway) context.getAttribute("engine");
            if (_engine == null) {
                _engine = new EngineGatewayImpl(enablePersist);
                context.setAttribute("engine", _engine);
            }
        } catch (YPersistenceException e) {
            logger.fatal("Failure to initialise runtime (persistence failure)", e);
            throw new UnavailableException("Persistence failure");
        }
    }