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 $

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


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


    }

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            }
        } catch (Exception e) {
            // when exception occurs during the servlet initialization
            // it should be marked as unavailable
            logger.error(e.getMessage(), e);
            throw new UnavailableException(e.getMessage());
        }
    }

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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
        String value = null;
        try {

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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();
      getServletContext().setAttribute(Constants.DATABASE_KEY,
               database);
  } catch (Exception e) {
      log("Database load exception", e);
      throw new UnavailableException
    ("Cannot load database from '" + pathname + "'");
  }


    }

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                context.log("Unable to convert config location " + configLocn + " to a URI: " + ex.getMessage());
            }
        }


        if (name == null) {
            throw new UnavailableException("A context-name attribute is required");
        }
        if (context.getAttribute(Log4jContextListener.LOG4J_CONTEXT_ATTRIBUTE) == null) {
            LoggerContext ctx;
            final LoggerContextFactory factory = LogManager.getFactory();
            if (factory instanceof Log4jContextFactory) {

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            ResourceProvider rp = new ServletContextResourceProvider(
                getServletContext());
            sling = new SlingBridge(logger, rp, props);
        } catch (Exception ex) {
            log("Cannot start the OSGi framework", ex);
            throw new UnavailableException("Cannot start the OSGi Framework: "
                + ex);
        }


        // set up the OSGi HttpService proxy servlet
        delegatee = new HttpServiceServlet();

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            }
        } catch (Exception e) {
            // when exception occurs during the servlet initialization
            // it should be marked as unavailable
            logger.error(e.getMessage(), e);
            throw new UnavailableException(e.getMessage());
        }
    }

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    @Override
    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"));


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

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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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