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>

<form�� runat=server>

� <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

Visit http://in.geocities.com/rsramsam