Mark
Raasi Potluri wrote:
Hi, I have written a simple servlet and trying to access an init param from the web.xml but the servlet is giving me a runtime error, please help, I'm stuck here, my runtime error says..
[code] HTTP Status 404 - Servlet invoker is not available
--------------------------------------------------------------------------------
type Status report
message Servlet invoker is not available
description The requested resource (Servlet invoker is not available) is not available.
--------------------------------------------------------------------------------
Apache Tomcat/5.0.28 [/code]
my code and web.xml fiels look like this..
InitParamServlet.java
[code]
import java.io.*; import javax.servlet.*; import javax.servlet.http.*;
public class InitParamServlet extends HttpServlet {
private String name;
public void init() throws ServletException {
name = (String)
getServletContext().getAttribute("name");
if (name == null) {
name = "no name initialized";
throw new UnavailableException("Couldn't get database."); } }
public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {
PrintWriter out = res.getWriter();
res.setContentType("text/html");
out.println("<html>");
out.println("<head> <meta
http-equiv=\"Content-Language\" content=\"en-gb\">
<meta http-equiv=\"Content-Type\"
content=\"text/html; charset=windows-1252\">");
out.println("<title>Hello</title>"); out.println("</head>");
out.println("<body>");
out.println("<p align=\"center\"> </p>"); out.println("<p align=\"center\"> </p>"); out.println("<p align=\"center\"><b><font size=\"6\">Hello, My Name is " + name + " This is a sample webpage, ");
out.println("</body>");
out.println("</html>");
}
}
[/code]
web.xml is
[code] <?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"; version="2.4">
<display-name>Welcome to Tomcat</display-name> <description> Welcome to Tomcat </description>
<!-- JSPC servlet mappings start -->
<servlet>
<servlet-name>org.apache.jsp.index_jsp</servlet-name>
<servlet-class>org.apache.jsp.index_jsp</servlet-class>
</servlet>
<servlet> <servlet-name>InitParamServlet</servlet-name> <servlet-class>InitParamServlet</servlet-class>
<init-param> <param-name>name</param-name> <param-value>Clint Fivefield!</param-value> </init-param>
</servlet>
<servlet-mapping> <servlet-name>InitParamServlet</servlet-name> <url-pattern>/InitParamServlet</url-pattern> </servlet-mapping>
<servlet-mapping>
<servlet-name>org.apache.jsp.index_jsp</servlet-name>
<url-pattern>/index.jsp</url-pattern>
</servlet-mapping>
<!-- JSPC servlet mappings end -->
</web-app>
[/code]
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