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 $

        } catch (Exception ex) {
            if (log.isDebugEnabled()){
                log.debug("", ex);
            }
            ex.printStackTrace();
            throw new UnavailableException(
                "Can't populate DefinitionsFactoryConfig class from 'web.xml': "
                    + ex.getMessage());
        }


        // Get init parameters from struts-config.xml
        try {
            Map strutsProperties = findStrutsPlugInConfigProperties(servlet, config);
            factoryConfig.populate(strutsProperties);


        } catch (Exception ex) {
            if (log.isDebugEnabled()) {
                log.debug("", ex);
            }


            throw new UnavailableException(
                "Can't populate DefinitionsFactoryConfig class from '"
                    + config.getPrefix()
                    + "/struts-config.xml':"
                    + ex.getMessage());
        }

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        // Load the web resources
        resources = (WebResourceRoot) getServletContext().getAttribute(
                Globals.RESOURCES_ATTR);


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

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        try {
            final ServletResolver sr = this.servletResolver;


            // check that we have all required services
            if (resourceResolver == null) {
                throw new UnavailableException("ResourceResolver");
            } else if (sr == null) {
                throw new UnavailableException("ServletResolver");
            }


            // initialize the request data - resolve resource and servlet
            Resource resource = requestData.initResource(resourceResolver);
            requestData.initServlet(resource, sr);

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                e.printStackTrace();
            }
        }


        if (!Library.isInitialized())
            throw new UnavailableException
                (sm.getString("handler.missing"));


        this.servletConfig = servletConfig;


        // Verify that we were not accessed using the invoker servlet
        String servletName = servletConfig.getServletName();
        if (servletName == null)
            servletName = "";
        if (servletName.startsWith("org.apache.catalina.INVOKER."))
            throw new UnavailableException
                ("Cannot invoke Handler through the invoker");




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

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        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 PHP Gateway Handler through the invoker");


        ScriptEnvironment env = new ScriptEnvironment(req,
                                                      getServletContext(),
                                                      scriptPathPrefix);

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        Oort oort = (Oort)config.getServletContext().getAttribute(Oort.OORT_ATTRIBUTE);
        if (oort==null)
        {
            _config.getServletContext().log("No "+Oort.OORT_ATTRIBUTE+" initialized");
            throw new UnavailableException(Oort.OORT_ATTRIBUTE);
        }


        String shard=_config.getInitParameter(Seti.SETI_SHARD);
        
        Seti seti= new Seti(oort,shard);

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      if (config.getInitParameter("unavailable")!=null && !fixed)
      {
          
          fixed=true;
          throw new UnavailableException("Unavailable test",Integer.parseInt(config.getInitParameter("unavailable")));
      }
    }

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            if ("/ex0".equals(pi))
                throw new ServletException("test ex0", new Throwable());
            else if ("/ex1".equals(pi))
                throw new IOException("test ex1");
            else if ("/ex2".equals(pi))
                throw new UnavailableException("test ex2");
            else if (pi.startsWith("/ex3/"))
                throw new UnavailableException("test ex3",Integer.parseInt(pi.substring(5)));
            throw new RuntimeException("test");
        }


        if ("true".equals(request.getParameter("close")))
            response.setHeader("Connection","close");


        String buffered= request.getParameter("buffered");
        
        PrintWriter pout=null;
        
        try
        {
            pout =response.getWriter();
        }
        catch(IllegalStateException e)
        {
            pout=new PrintWriter(new OutputStreamWriter(response.getOutputStream(),charset));
        }
        if (buffered!=null)
            pout = new PrintWriter(new BufferedWriter(pout,Integer.parseInt(buffered)));
        
        try
        {
            pout.write("<html>\n<body>\n");
            pout.write("<h1>Dump Servlet</h1>\n");
            pout.write("<table width=\"95%\">");
            pout.write("<tr>\n");
            pout.write("<th align=\"right\">getMethod:&nbsp;</th>");
            pout.write("<td>" + notag(request.getMethod())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getContentLength:&nbsp;</th>");
            pout.write("<td>"+Integer.toString(request.getContentLength())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getContentType:&nbsp;</th>");
            pout.write("<td>"+notag(request.getContentType())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRequestURI:&nbsp;</th>");
            pout.write("<td>"+notag(request.getRequestURI())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRequestURL:&nbsp;</th>");
            pout.write("<td>"+notag(request.getRequestURL().toString())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getContextPath:&nbsp;</th>");
            pout.write("<td>"+request.getContextPath()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getServletPath:&nbsp;</th>");
            pout.write("<td>"+notag(request.getServletPath())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getPathInfo:&nbsp;</th>");
            pout.write("<td>"+notag(request.getPathInfo())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getPathTranslated:&nbsp;</th>");
            pout.write("<td>"+notag(request.getPathTranslated())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getQueryString:&nbsp;</th>");
            pout.write("<td>"+notag(request.getQueryString())+"</td>");


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getProtocol:&nbsp;</th>");
            pout.write("<td>"+request.getProtocol()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getScheme:&nbsp;</th>");
            pout.write("<td>"+request.getScheme()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getServerName:&nbsp;</th>");
            pout.write("<td>"+notag(request.getServerName())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getServerPort:&nbsp;</th>");
            pout.write("<td>"+Integer.toString(request.getServerPort())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getLocalName:&nbsp;</th>");
            pout.write("<td>"+request.getLocalName()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getLocalAddr:&nbsp;</th>");
            pout.write("<td>"+request.getLocalAddr()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getLocalPort:&nbsp;</th>");
            pout.write("<td>"+Integer.toString(request.getLocalPort())+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRemoteUser:&nbsp;</th>");
            pout.write("<td>"+request.getRemoteUser()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRemoteAddr:&nbsp;</th>");
            pout.write("<td>"+request.getRemoteAddr()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRemoteHost:&nbsp;</th>");
            pout.write("<td>"+request.getRemoteHost()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRemotePort:&nbsp;</th>");
            pout.write("<td>"+request.getRemotePort()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getRequestedSessionId:&nbsp;</th>");
            pout.write("<td>"+request.getRequestedSessionId()+"</td>");
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">isSecure():&nbsp;</th>");
            pout.write("<td>"+request.isSecure()+"</td>");


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">isUserInRole(admin):&nbsp;</th>");
            pout.write("<td>"+request.isUserInRole("admin")+"</td>");


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"right\">getLocale:&nbsp;</th>");
            pout.write("<td>"+request.getLocale()+"</td>");
            
            Enumeration locales= request.getLocales();
            while (locales.hasMoreElements())
            {
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">getLocales:&nbsp;</th>");
                pout.write("<td>"+locales.nextElement()+"</td>");
            }
            pout.write("</tr><tr>\n");
            
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Other HTTP Headers:</big></th>");
            Enumeration h= request.getHeaderNames();
            String name;
            while (h.hasMoreElements())
            {
                name= (String)h.nextElement();


                Enumeration h2= request.getHeaders(name);
                while (h2.hasMoreElements())
                {
                    String hv= (String)h2.nextElement();
                    pout.write("</tr><tr>\n");
                    pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
                    pout.write("<td>"+notag(hv)+"</td>");
                }
            }


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Parameters:</big></th>");
            h= request.getParameterNames();
            while (h.hasMoreElements())
            {
                name= (String)h.nextElement();
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
                pout.write("<td>"+notag(request.getParameter(name))+"</td>");
                String[] values= request.getParameterValues(name);
                if (values == null)
                {
                    pout.write("</tr><tr>\n");
                    pout.write("<th align=\"right\">"+notag(name)+" Values:&nbsp;</th>");
                    pout.write("<td>"+"NULL!"+"</td>");
                }
                else if (values.length > 1)
                {
                    for (int i= 0; i < values.length; i++)
                    {
                        pout.write("</tr><tr>\n");
                        pout.write("<th align=\"right\">"+notag(name)+"["+i+"]:&nbsp;</th>");
                        pout.write("<td>"+notag(values[i])+"</td>");
                    }
                }
            }


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Cookies:</big></th>");
            Cookie[] cookies = request.getCookies();
            for (int i=0; cookies!=null && i<cookies.length;i++)
            {
                Cookie cookie = cookies[i];


                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">"+notag(cookie.getName())+":&nbsp;</th>");
                pout.write("<td>"+notag(cookie.getValue())+"</td>");
            }
            
            String content_type=request.getContentType();
            if (content_type!=null &&
                !content_type.startsWith("application/x-www-form-urlencoded") &&
                !content_type.startsWith("multipart/form-data"))
            {
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"left\" valign=\"top\" colspan=\"2\"><big><br/>Content:</big></th>");
                pout.write("</tr><tr>\n");
                pout.write("<td><pre>");
                char[] content= new char[4096];
                int len;
                try{
                    Reader in=request.getReader();
                    
                    while((len=in.read(content))>=0)
                        pout.write(notag(new String(content,0,len)));
                }
                catch(IOException e)
                {
                    pout.write(e.toString());
                }
                
                pout.write("</pre></td>");
            }
            
            
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Attributes:</big></th>");
            Enumeration a= request.getAttributeNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\" valign=\"top\">"+name+":&nbsp;</th>");
                pout.write("<td>"+"<pre>" + toString(request.getAttribute(name)) + "</pre>"+"</td>");
            }            


            
            pout.write("</tr><tr>\n");
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Servlet InitParameters:</big></th>");
            a= getInitParameterNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">"+name+":&nbsp;</th>");
                pout.write("<td>"+ toString(getInitParameter(name)) +"</td>");
            }


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context InitParameters:</big></th>");
            a= getServletContext().getInitParameterNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">"+name+":&nbsp;</th>");
                pout.write("<td>"+ toString(getServletContext().getInitParameter(name)) + "</td>");
            }


            pout.write("</tr><tr>\n");
            pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context Attributes:</big></th>");
            a= getServletContext().getAttributeNames();
            while (a.hasMoreElements())
            {
                name= (String)a.nextElement();
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\" valign=\"top\">"+name+":&nbsp;</th>");
                pout.write("<td>"+"<pre>" + toString(getServletContext().getAttribute(name)) + "</pre>"+"</td>");
            }




            String res= request.getParameter("resource");
            if (res != null && res.length() > 0)
            {
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Get Resource: \""+res+"\"</big></th>");
                
                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">this.getClass().getResource(...):&nbsp;</th>");
                pout.write("<td>"+this.getClass().getResource(res)+"</td>");


                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">this.getClass().getClassLoader().getResource(...):&nbsp;</th>");
                pout.write("<td>"+this.getClass().getClassLoader().getResource(res)+"</td>");


                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResource(...):&nbsp;</th>");
                pout.write("<td>"+Thread.currentThread().getContextClassLoader().getResource(res)+"</td>");


                pout.write("</tr><tr>\n");
                pout.write("<th align=\"right\">getServletContext().getResource(...):&nbsp;</th>");
                try{pout.write("<td>"+getServletContext().getResource(res)+"</td>");}
                catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
            }
            
            pout.write("</tr></table>\n");


            /* ------------------------------------------------------------ */
            pout.write("<h2>Request Wrappers</h2>\n");
            ServletRequest rw=request;
            int w=0;
            while (rw !=null)
            {
                pout.write((w++)+": "+rw.getClass().getName()+"<br/>");
                if (rw instanceof HttpServletRequestWrapper)
                    rw=((HttpServletRequestWrapper)rw).getRequest();
                else if (rw  instanceof ServletRequestWrapper)
                    rw=((ServletRequestWrapper)rw).getRequest();
                else
                    rw=null;
            }
            
            pout.write("<br/>");
            pout.write("<h2>International Characters (UTF-8)</h2>");
            pout.write("LATIN LETTER SMALL CAPITAL AE<br/>\n");
            pout.write("Directly uni encoded(\\u1d01): \u1d01<br/>");
            pout.write("HTML reference (&amp;AElig;): &AElig;<br/>");
            pout.write("Decimal (&amp;#7425;): &#7425;<br/>");
            pout.write("Javascript unicode (\\u1d01) : <script language='javascript'>document.write(\"\u1d01\");</script><br/>");
            pout.write("<br/>");
            pout.write("<h2>Form to generate GET content</h2>");
            pout.write("<form method=\"GET\" action=\""+response.encodeURL(getURI(request))+"\">");
            pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
            pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\">");
            pout.write("</form>");


            pout.write("<br/>");
            
            pout.write("<h2>Form to generate POST content</h2>");
            pout.write("<form method=\"POST\" accept-charset=\"utf-8\" action=\""+response.encodeURL(getURI(request))+"\">");
            pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
            pout.write("Select: <select multiple name=\"Select\">\n");
            pout.write("<option>ValueA</option>");
            pout.write("<option>ValueB1,ValueB2</option>");
            pout.write("<option>ValueC</option>");
            pout.write("</select><br/>");
            pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
            pout.write("</form>");
            pout.write("<br/>");
            
            pout.write("<h2>Form to generate UPLOAD content</h2>");
            pout.write("<form method=\"POST\" enctype=\"multipart/form-data\" accept-charset=\"utf-8\" action=\""+response.encodeURL(getURI(request))+"\">");
            pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"comment\"/><br/>\n");
            pout.write("File 1: <input type=\"file\" name=\"file1\" /><br/>\n");
            pout.write("File 2: <input type=\"file\" name=\"file2\" /><br/>\n");
            pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
            pout.write("</form>");


            pout.write("<h2>Form to set Cookie</h2>");
            pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
            pout.write("cookie: <input type=\"text\" name=\"cookie\" /><br/>\n");
            pout.write("value: <input type=\"text\" name=\"cookiev\" /><br/>\n");
            pout.write("<input type=\"submit\" name=\"Action\" value=\"setCookie\">");
            pout.write("</form>\n");
            
            pout.write("<h2>Form to get Resource</h2>");
            pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
            pout.write("resource: <input type=\"text\" name=\"resource\" /><br/>\n");
            pout.write("<input type=\"submit\" name=\"Action\" value=\"getResource\">");
            pout.write("</form>\n");
            


        }
        catch (Exception e)
        {
            getServletContext().log("dump", e);
        }


        
        if (request.getParameter("stream")!=null)
        {
            pout.flush();
            Continuation continuation = ContinuationSupport.getContinuation(request, null);
            continuation.suspend(Long.parseLong(request.getParameter("stream")));
        }


        String lines= request.getParameter("lines");
        if (lines!=null)
        {
            char[] line = "<span>A line of characters. Blah blah blah blah.  blooble blooble</span></br>\n".toCharArray();
            for (int l=Integer.parseInt(lines);l-->0;)
            {
                pout.write("<span>"+l+" </span>");
                pout.write(line);
            }
        }
        
        pout.write("</body>\n</html>\n");
        
        pout.close();


        if (pi != null)
        {
            if ("/ex4".equals(pi))
                throw new ServletException("test ex4", new Throwable());
            if ("/ex5".equals(pi))
                throw new IOException("test ex5");
            if ("/ex6".equals(pi))
                throw new UnavailableException("test ex6");
        }




    }

View Full Code Here

                _resourceBase = _context.getContextHandler().getResource(URIUtil.SLASH).addPath(rrb);
            }
            catch (Exception e) 
            {
                Log.warn(Log.EXCEPTION,e);
                throw new UnavailableException(e.toString()); 
            }
        }
        
        String rb=getInitParameter("resourceBase");
        if (rrb != null && rb != null)
            throw new  UnavailableException("resourceBase & relativeResourceBase");    
        
        if (rb!=null)
        {
            try{_resourceBase=Resource.newResource(rb);}
            catch (Exception e) 
            {
                Log.warn(Log.EXCEPTION,e);
                throw new UnavailableException(e.toString()); 
            }
        }
        
        String t=getInitParameter("cacheControl");
        if (t!=null)
            _cacheControl=new ByteArrayBuffer(t);
        
        try
        {
            if (_resourceBase==null)
                _resourceBase = _context.getContextHandler().getResource(URIUtil.SLASH);


            String cache_type =getInitParameter("cacheType");
            int max_cache_size=getInitInt("maxCacheSize", -2);
            int max_cached_file_size=getInitInt("maxCachedFileSize", -2);
            int max_cached_files=getInitInt("maxCachedFiles", -2);


            if (cache_type==null || "nio".equals(cache_type)|| "both".equals(cache_type))
            {
                if (max_cache_size==-2 || max_cache_size>0)
                {
                    _nioCache=new NIOResourceCache(_mimeTypes);
                    if (max_cache_size>0)
                        _nioCache.setMaxCacheSize(max_cache_size);    
                    if (max_cached_file_size>=-1)
                        _nioCache.setMaxCachedFileSize(max_cached_file_size);    
                    if (max_cached_files>=-1)
                        _nioCache.setMaxCachedFiles(max_cached_files);
                    _nioCache.start();
                }
            }
            if ("bio".equals(cache_type)|| "both".equals(cache_type))
            {
                if (max_cache_size==-2 || max_cache_size>0)
                {
                    _bioCache=new ResourceCache(_mimeTypes);
                    if (max_cache_size>0)
                        _bioCache.setMaxCacheSize(max_cache_size);    
                    if (max_cached_file_size>=-1)
                        _bioCache.setMaxCachedFileSize(max_cached_file_size);    
                    if (max_cached_files>=-1)
                        _bioCache.setMaxCachedFiles(max_cached_files);
                    _bioCache.start();
                }
            }
            if (_nioCache==null)
                _bioCache=null;
           
        }
        catch (Exception e) 
        {
            Log.warn(Log.EXCEPTION,e);
            throw new UnavailableException(e.toString()); 
        }
        
        if (Log.isDebugEnabled()) Log.debug("resource base = "+_resourceBase);
    }

View Full Code Here

  private static final long serialVersionUID = 1059690109835686359L;
  private FrontModule frontModule;
  
  public void init() throws UnavailableException  {
    if (!Config.ready)  {
      throw new UnavailableException("The application has failed to setup properly and cannot start. Please check the log for more details.");
    }
    frontModule = new FrontModule();
  }

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