NetRexx Servlets on Tomcat - a few easy steps
Locked
 
|
I’ll be posting a more colorful version of this somewhere on the interweb. My ultimate goal is a packaged appliance for VirutalBox with NetRexx as the centerpiece. I decided on a Linux (Debian) base, with Tomcat (java web server). You can get a prebuilt image here:
http://www.turnkeylinux.org/tomcat I use Virtualbox on my Windows machine to host virtual guests. (Free) And it works great.
https://www.virtualbox.org/ The Turnkey ISO can be attached and booted and will install to a virtual hard drive. Cool. Now this is a “server” type machine that you can access via putty or other ssh tool or via a browser. It has no GUI. Command line or browser only. Which is fine. So lets install NetRexx. From the command prompt, change to or create a temp directory and cd to it. 1)
wget
http://www.netrexx.org/files/NetRexx-3.02RC1.zip 2)
unzip NetRexx-3.02RC1.zip 3)
follow the readme --- oops breaks down here – the shell scripts aren’t right
4)
work around… ? CLASSPATH=/root/lib/NetRexxC.jar:/root/lib/NetRexxF.jar:/usr/share/tomcat6/lib/servlet-api.jar export CLASSPATH java -classpath $CLASSPATH org.netrexx.process.NetRexxC /media/sf_transfer/precompile/NrxServletTest.nrx NetRexx portable processor, version NetRexx 3.02, build 11-20130323-1551 Copyright (c) RexxLA, 2011,2013. All rights reserved. Parts Copyright (c) IBM Corporation, 1995,2008. Program NrxServletTest.nrx === class NrxServletTest === method doGet(HttpServletRequest,HttpServletResponse) signals IOException overrides HttpServlet.doGet(HttpServletRequest,HttpServletResponse) java.lang.ClassNotFoundException: com.sun.tools.javac.Main Compilation of 'NrxServletTest.nrx' failed [javac failed] Ok, fine, it did create the NrxServletTest.java, so javac NrxServletTest and we’ve got the class file. Now how to package our servlet and get it working in the webserver. First the WAR file and aptly named it is. We create a directory structure that we will then jar up to deploy to Tomcat and copy our NetRexx class to the classes directory. The NetRexxC.jar will go in the lib directory so Tomcat can find it. The web.xml file describes the servlet class to url mapping. ------------------directory structure ---------------------- /Temp/ NetRexxWAR/ META-INF/ WEB-INF/ Classes/ NrxServletTest.class web.xml lib/ NetRexxC.jar -----------web.xml example--------------- <?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" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>NetRexx Test Servlet, a first Web Application</display-name> <description> This is a simple web application containing a single servlet of the "Hello, World" variety. </description> <servlet> <servlet-name>nrxHello</servlet-name> <servlet-class>NrxServletTest</servlet-class> </servlet> <servlet-mapping> <servlet-name>nrxHello</servlet-name> <url-pattern>/Hello</url-pattern> </servlet-mapping> </web-app> ---------------------------------------------------- Then to create the WAR file, CD into the NetRexxWAR directory and type jar –cvf NetRexxWAR.war . (don’t forget that period ) Deploy the application war file from the Tomcat console. In your browser use the guest ip and /manager ex: 192.168.56.101/Manager You’ll see a screen with the default url. Scroll down to the Deploy section and where it says “War file to deploy” select the NetRexxWAR.war that you just created. Hit the deploy
button and you’ll see it appear in the list at the top of the page. Now, to access your servlet, go to the server/NetRexxWAR/Hello – ex:
http://192.168.56.101/NetRexxWAR/Hello If all went well you’ll see this: Welcome to the NetRexx Servlet example page
/* NrxServletTest.nrx */ import java.io import javax.servlet import javax.servlet.http class NrxServletTest extends HttpServlet method doGet(req=HttpServletRequest,res=HttpServletResponse) public final res.setContentType("text/html") -- Set Content type to HTML out = PrintWriter -- Create an object for streaming code out = res.getWriter
out.println("<HTML>") -- Output code for browser out.println("<HEAD>") out.println("<TITLE>NetRexx Servlet Example</TITLE>") out.println("</HEAD>") out.println("<BODY>") out.println("<H1>Welcome to the NetRexx Servlet example page</H1>") out.println("</BODY>") out.println("</HTML>") _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ |
Re: NetRexx Servlets on Tomcat - a few easy steps
|
|
-- Robert P. Nix Mayo Foundation .~. RO-OC-1-18 200 First Street SW /V\ 507-284-0844 Rochester, MN 55905 /( )\ ----- ^^-^^ "In theory, theory and practice are the same, but in practice, theory and practice are different." On 4/24/13 8:46 AM, "Measel, Mike" <Mike.Measel@...> wrote: I’ll be posting a more colorful version of this somewhere on the interweb. My ultimate goal is a packaged appliance for VirutalBox with NetRexx as the centerpiece. _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ |
|
|
Yes thanks Robert, I know, I was just trying to follow the instructions for a change.
J Raspberry NetRexx, Nice. From: [hidden email] [mailto:[hidden email]]
On Behalf Of Nix, Robert P. You can get rid of the java.lang.ClassNotFoundException: com.sun.tools.javac.Main exception in NetRexxC by adding the tools.jar file to your
$CLASSPATH. In my case, it’s located at /usr/lib/jvm/java-6-openjdk-armhf/lib/tools.jar (You’ll find it elsewhere, unless your computer fits in your pocket and smells of raspberries.) I’ll be posting a more colorful version of this somewhere on the interweb. My ultimate goal is a packaged appliance for VirutalBox with NetRexx
as the centerpiece. _______________________________________________ _______________________________________________ Ibm-netrexx mailing list [hidden email] Online Archive : http://ibm-netrexx.215625.n3.nabble.com/ |
| Free forum by Nabble | Edit this page |