Method init

java/org/apache/jasper/servlet/JspServlet.java:74–126

(ServletConfig config)

    @Override
    public void init(ServletConfig config) throws ServletException {

        super.init(config);
        this.config = config;
        this.context = config.getServletContext();

        // Initialize the JSP Runtime Context
        // Check for a custom Options implementation
        String engineOptionsName = config.getInitParameter("engineOptionsClass");
        if (engineOptionsName != null) {
            // Instantiate the indicated Options implementation
            try {
                ClassLoader loader = Thread.currentThread().getContextClassLoader();
                Class<?> engineOptionsClass = loader.loadClass(engineOptionsName);
                Class<?>[] ctorSig = { ServletConfig.class, ServletContext.class };
                Constructor<?> ctor = engineOptionsClass.getConstructor(ctorSig);
                Object[] args = { config, context };
                options = (Options) ctor.newInstance(args);
            } catch (Throwable t) {
                Throwable throwable = ExceptionUtils.unwrapInvocationTargetException(t);
                ExceptionUtils.handleThrowable(throwable);
                // Need to localize this.
                log.warn(Localizer.getMessage("jsp.warning.engineOptionsClass", engineOptionsName), throwable);
                // Use the default Options implementation
                options = new EmbeddedServletOptions(config, context);
            }
        } else {
            // Use the default Options implementation
            options = new EmbeddedServletOptions(config, context);
        }
        rctxt = new JspRuntimeContext(context, options);
        if (config.getInitParameter("jspFile") != null) {
            jspFile = config.getInitParameter("jspFile");
            try {
                if (null == context.getResource(jspFile)) {
                    return;
                }
            } catch (MalformedURLException e) {
                throw new ServletException(Localizer.getMessage("jsp.error.no.jsp", jspFile), e);
            }
            try {
                serviceJspFile(null, null, jspFile, true);
            } catch (IOException ioe) {
                throw new ServletException(Localizer.getMessage("jsp.error.precompilation", jspFile), ioe);
            }
        }

        if (log.isDebugEnabled()) {
            log.debug(Localizer.getMessage("jsp.message.scratch.dir.is", options.getScratchDir().toString()));
            log.debug(Localizer.getMessage("jsp.message.dont.modify.servlets"));
        }
    }


    /**