Examples of javax.servlet.UnavailableException

javax.servlet.UnavailableException
Thrown if a servlet is permanently or temporarily unavailable @author Rick Knowles @version $Id: UnavailableException.java,v 1.2 2006/02/28 07:32:47 rickknowles Exp $

        
        Bayeux bayeux = (Bayeux)config.getServletContext().getAttribute(Bayeux.DOJOX_COMETD_BAYEUX);
        if (bayeux==null)
        {
            _config.getServletContext().log("No "+Bayeux.DOJOX_COMETD_BAYEUX+" initialized");
            throw new UnavailableException(Bayeux.DOJOX_COMETD_BAYEUX);
        }


        String url=_config.getInitParameter(Oort.OORT_URL);
        if (url==null)
        {
            _config.getServletContext().log("No "+Oort.OORT_URL+" init parameter");
            throw new UnavailableException(Oort.OORT_URL);
        }
        
        Oort oort= new Oort(url,bayeux);
        _config.getServletContext().setAttribute(Oort.OORT_ATTRIBUTE,oort);

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                      HttpServletResponse response)
        throws IOException, ServletException {


        // Verify that we were not accessed using the invoker servlet
        if (request.getAttribute(Globals.INVOKED_ATTR) != null)
            throw new UnavailableException
                (sm.getString("managerServlet.cannotInvoke"));


        // Identify the request parameters that we need
        String command = request.getPathInfo();
        if (command == null)

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                      HttpServletResponse response)
        throws IOException, ServletException {


        // Verify that we were not accessed using the invoker servlet
        if (request.getAttribute(Globals.INVOKED_ATTR) != null)
            throw new UnavailableException
                (sm.getString("managerServlet.cannotInvoke"));


        // Identify the request parameters that we need
        String command = request.getPathInfo();
        if (command == null)

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     */
    public void init() throws ServletException {


        // Ensure that our ContainerServlet properties have been set
        if ((wrapper == null) || (context == null))
            throw new UnavailableException
                (sm.getString("managerServlet.noWrapper"));


        // Verify that we were not accessed using the invoker servlet
        String servletName = getServletConfig().getServletName();
        if (servletName == null)
            servletName = "";
        if (servletName.startsWith("org.apache.catalina.INVOKER."))
            throw new UnavailableException
                (sm.getString("managerServlet.cannotInvoke"));


        // Set our properties from the initialization parameters
        String value = null;
        try {

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        // Load the MD5 helper used to calculate signatures.
        try {
            md5Helper = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new UnavailableException("No MD5");
        }


    }

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                throw new ServletException("No resources", e);
            }
        }


        if (resources == null) {
            throw new UnavailableException("No resources");
        }


    }

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     */
    public void init() throws ServletException {


        // Ensure that our ContainerServlet properties have been set
        if ((wrapper == null) || (context == null))
            throw new UnavailableException
                (sm.getString("invokerServlet.noWrapper"));


        // Set our properties from the initialization parameters
        if (getServletConfig().getInitParameter("debug") != null)
            debug = Integer.parseInt(getServletConfig().getInitParameter("debug"));

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        // Verify that we were not accessed using the invoker servlet
        String servletName = getServletConfig().getServletName();
        if (servletName == null)
            servletName = "";
        if (servletName.startsWith("org.apache.catalina.INVOKER."))
            throw new UnavailableException
                ("Cannot invoke CGIServlet through the invoker");
        
        // Set our properties from the initialization parameters
        if (getServletConfig().getInitParameter("debug") != null)
            debug = Integer.parseInt(getServletConfig().getInitParameter("debug"));

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    protected void doGet(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException {


        // Verify that we were not accessed using the invoker servlet
        if (req.getAttribute(Globals.INVOKED_ATTR) != null)
            throw new UnavailableException
                ("Cannot invoke CGIServlet through the invoker");


        CGIEnvironment cgiEnv = new CGIEnvironment(req, getServletContext());


        if (cgiEnv.isValid()) {

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        // Load the MD5 helper used to calculate signatures.
        try {
            md5Helper = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new UnavailableException("No MD5");
        }


    }

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