WEBSERVICES USING APACHE AXIS - TUTORIAL-2 AXIS FOR EJB-WEBSERVICE (part-1)

WEBSERVICE USING APACHE AXIS TUTORIAL-1
Using Java XML-WEBSERVICE from ASP.net.
( published in DeveloperIQ January-2004)( www.developeriq.com)
R.S.RAMASWAMY (rs.ramaswamy@gmail.com)

Sri.Manoj Kothale, has written a fine piece in DeveloperIQ(Nov'03) on exposing an EJB as an XML-WebService, using Axis and JBOss. In this experiment, we attempt exposing a javabean (jws) from Tomcat/Axis and consuming that service in an ASP.net program.This is much simpler.

Inter-operability is one of the two aims of Xml-webservice paradigm,while the other aim is tackling the firewall problem. (Since ASP.net runs only in Win2000, switch over to Win2000. before beginning this experiment).The emphasis is on the procedure, in laboratory experiment fashion).

Kindly , ensure that correct versions of software , are used, as mentioned.It is presumed that DotNet SDK has already been installed and tested,for running asp.net programs.

1) axis1.1 was installed in c:\axis11

2) tomcat4.1 from march-2003 issue of Dev IQ.

was installed as c:\tomcat41

3) We will find a folder named 'axis' in c:\axiss11\webapps.

Copy this ('axis') folder to c:\tomcat41\webapps folder.

4) We must copy activation.jar to:

c:\tomcat41\webapps\axis\web-inf\lib folder. (This file is available in jboss3.2\server\all\lib folder

and jboss3.2 was given in NovemberCD.)

5) We set JAVA_HOME for tomcat as follows:

c:\tomcat41\bin>set JAVA_HOME=D:\jdk141 (because, we have installed jdk1.4.1 in D-drive).

6) We should uncomment the 'admin servlet' part in

the web.xml file in c:\tomcat41\webapps\axis\web-inf folder.

7) We start tomcat server:

c:\tomcat41\bin>startup

8) This starts tomcat4.1 and we wait till, it is fully started.

9) We create our own folder c:\axisdemo

In this folder, we create a simple javabean greeter.java as given below.

// c:\axisdemo\greeter.java

public class greeter

{

public String greetme(String s)

{

return "How are you?……………….."+s;

}

10) we copy greeter.java as greeter.jws

into c:\tomcat41\webapps\axis folder.

(we did this while tomcat41 was running!).No problem!

11) We start the browser and type the URL as:

'http://localhost:8080/axis/greeter.jws'

and we get a link to the wsdl file for the above service. When we click this link, we get a wsdl file .

(wsdl -> webservice description language).

12) We save this wsdl file in d:\inetpub\wwwroot folder as greeter.wsdl

13) Our aim is to create a C# file from this wsdl file.

The following command does that.

d:\inetpub\wwwroot>wsdl greeter.wsdl

This command created greeterService.cs file!

( carefully note that the name has been appended with 'Service')

The next step is to compile this source file into a dll.

14)..wwwroot>csc /t:library

/r:System.dll,System.Web.Services.dll,System.Xml.dll

greeterService.cs

(type this in continuous line).

( t -> target & r -> reference)

This command created greeterService.dll

15) Now copy this dll file to d:\inetpub\wwwroot\bin folder.

( If there is no such 'bin' folder create it.).

Now create greeterService.aspx as given below.

( in d:\inetpub\wwwroot folder)

<%@ page language="c#" %>

public void job1(Object o, EventArgs e)

{

String a = text1.Text;

greeterService greeter = new greeterService();

String s = greeter.greetme(a);

Response.Write(s);

}

</script>

<html>

<body>

<asp:Textbox id=’text1’ runat=server />

<asp:Button onclick=job1 text="Click" runat=server />

</form>

</body>

</html>

( Normally, IIS-5 will be running . If not, start it.)

After this, type the URL in browser as:

'http://localhost/greeterService.aspx'

Remember that the tomcat server is running and supplying the 'greeter.jws'.

After some delay ( due to compiling time), we get a form.Type your name in the textbox ( say, ‘sam’ )& click the button to invoke the service. We get 'How are you?…..sam’ message from the java web service. We get correct result . We can also create a standalone C# client by just appending a main() to the greeterService.cs and naming it as ‘greeterConsole.cs’.

Ref: AXIS..by RominIrani & JeelaniBasha (wrox press). Tutorual-2 continues in axis2a.htm

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