1
Creating Web Services
Presented by
Ashraf Memon
Hands
-
on
Ashraf Memon, Ghulam Memon
2
Overview
•
Writing service classes in Java
•
Generating service
•
Deploying services with Apache
Axis
•
Generating client files and testing
them
3
Writing service classes in Java
•
Service classes are similar to
normal Java classes
–
Any existing Java Class can be
converted into web service
–
Keep the input/output interface
simple (primitive types such as
String, int, boolean, double)
4
Writing service classes in Java
•
Class contains 1
function
which
performs addition.
•
Function
signature
is
public String sum(int num1, int num2)
•
Function implementation is
int answer = num1+num2;
return "Sum of "+num1+" and "+num2+"
is "+answer;
5
Writing service classes in Java
public class Math {
public String getSum(int num1, int num2){
int answer = num1+num2;
return "Sum of ” + num1 + " and "+ num2 +
" is ” + answer;
}
public static void main(String[] args) {
int num1=3;
int num2=4;
Math sampleProgram = new Math();
String reply = sampleProgram.getSum(3,4);
System.out.println(reply);
}
}
6
Generating Service
•
Navigate to solutions directory
c:
\
data
\
csig05
\
ws
\
solutions
•
Open command prompt by right clicking on the math
directory and selecting “Command Prompt Here”
•
Change to math directory by typing following at the
command prompt
cd math
•
Compile Math.java file by typing following at command
prompt
javac Math.java
•
Run program by typing following at command prompt
java Math
•
Output should be
Sum of 3 and 4 is 7
•
Type exit on the command prompt to quit
7
Deploying services with Apache Axis
•
Copy generated class file to
C:
\
tools
\
tomcat4.1
\
webapps
\
axis
\
WEB
-
INF
\
classes
\
•
Open using any text editor deployMath.wsdd from
C:
\
tools
\
tomcat4.1
\
webapps
\
axis
\
WEB
-
INF
\
classes
\
•
Get yourself familiar with the contents
8
Deploying services with Apache Axis
•
Navigate to C:
\
tools
\
tomcat4.1
\
webapps
\
axis
\
WEB
-
INF
\
•
Open command prompt by right clicking on the classes
directory and selecting “Command Prompt Here”
•
Change to classes directory by typing following at the
command prompt
cd classes
•
Set classpath by typing classpath.bat on the command
prompt
•
Execute deployment descriptor by typing deploy.bat
deployMath.wsdd at command prompt
•
This will deploy math webservice on Axis SOAP Server
•
Test it by going to
http://localhost/axis/
and navigating
to Math Service
9
Generating client files and testing them
•
Change directory to c:
\
data
\
csig05
\
ws
\
solutions
\
math
by typing “cd c:
\
data
\
csig05
\
ws
\
solutions
\
math” on the
command prompt
•
Compile MathServiceClient.java by typing following on
the command prompt
javac MathServiceClient.java
•
Execute Client by typing following on the command
prompt
java MathServiceClient
•
Output should be
MathService.getSum(100,333) = Sum of 100 and 333 is
433
10
•
Create Web Service to Access
ASCII file
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