Deawsj 7 ppt-2_b

Developing a Web Service Using JAX-RPC API

Pre-assessment Questions
1. Identify the false statement regarding the JAX-RPC.
a) Web services created in JAX-RPC are interoperable.
b) Web services created in JAX-RPC are portable.
c) Web services created in JAX-RPC uses SOAP protocol.
d) Web services created in JAX-RPC can only be called by the clients
created in J2EE platform.

©NIIT XML and Web Services Lesson 2B / Slide 1 of 16


Pre-assessment Questions (Contd.)
2. Which option specifies the data types supported by JAX-RPC?
a) int, float, boolean
b) float, char, boolean
c) char, int, float
d) long, double, char



3. Consider the following statements
Statement A: To create a WSDL file, the Web service configuration file
specifies the Web service endpoint interface.
Statement B: To create a WSDL file the Web service configuration file
specifies the name of the Web service implementation class.
Identify the correct option.
a) Both, statements A and B are true
b) Both, statements A and B are false
c) Statement A is true while B is false
d) Statement A is false while B is true



4. The ___________defines a Web service and is published in a Web service
registry.
a) Endpoint interface of Web service
b) WSDL file of Web service
c) Implementation class of Web service
d) Configuration file of Web service



5. Identify the correct option regarding the packaging of a Web service for
deployment in the J2EE application server.
a) A Web service is packaged in a WAR file.
b) A Web service is packaged in a JAR file.
c) A Web service is packaged in a EAR file.
d) A Web service is directly deployed, therefore no packaging is required.



Solutions to Pre-assessment
Questions
• d. Web services created in JAX-RPC can only be called by the clients created
in J2EE platform.
• a. int, float, boolean
• c. Statement A is true while B is false
• b. WSDL file of Web service
• a. A Web service is packaged in a WAR file.



Objectives

In this lesson, you will learn about:

• Implementing the JAX RPC Web Service and Web Clients



Demonstration-Implementing a JAX-
RPC Web Service

• Problem Statement

• John, an employee of ABC Inc., wants to inform his colleagues
about the personality traits of their zodiac sign. However, the
employees of ABC Inc work on different types of operating
systems. To achieve platform independency, John will create a
Web service horoscope application, which can be accessed by
different types of clients to display sun sign traits.



RPC Web Service (Contd.)

• Solution

• To solve the given problem, perform the following tasks:
1. Create a horoscope Web service.
2. Create a standalone client that uses static stub to access
the Web service.
3. Create a J2EE Web client to access the Web service.



• Solution (Contd.)

1. Create a horoscope Web service.
• Create a horoscope Web service endpoint interface.
• Create an implementation class for the horoscope Web
service endpoint interface.
• Compile the horoscope Web service end point interface and
the implementation class.
• Create a configuration file.
• Generate the WSDL and mapping files.
• Package the horoscope Web service.
• Configure the horoscope Web service.
• Deploy the horoscope Web service.



1. Create a standalone client that uses static stub to access the
Web service.
a. Create a static stub client.
b. Create a configuration file.
c. Generate the necessary runtime class files.
d. Compile the static stub client.
e. Run the static stub client.




1. Create a J2EE Web client to access the Web service.
a. Create an HTML page.
b. Create a J2EE Web client.
c. Create a configuration file.
d. Generate the necessary runtime class files.
e. Compile the J2EE Web client.
f. Package the J2EE Web client.
g. Deploy the J2EE Web client.
h. Access the horoscope Web service using J2EE Web client.



Practice-Implementing a JAX-RPC
Web Service using Static Stub
• Problem Statement

• Create a temperature converter Java Web service application
that converts temperature from Celsius to Fahrenheit. You also
need to create a standalone client that uses static stub to access
the Web service. The client accepts the temperature value from
a user that needs to be converted through the command prompt.



Summary

In this lesson, you learned:

• While developing a Web Service, the following tasks are performed:
• Create a horoscope Web service endpoint interface.
• Create an implementation class for the horoscope Web service endpoint
interface.
• Compile the horoscope Web service end point interface and the
implementation class.
• Generate the WSDL and mapping files.
• Package the horoscope Web service.



Summary (Contd.)

• To create a standalone client that uses static stub to access the Web service,
the following tasks are performed:
• Create a static stub client.
• Generate the necessary runtime class files.
• Compile the static stub client.



Summary (Contd.)
• To create a J2EE Web client to access the Web service, the following
tasks are performed:
• Create an HTML page.
• Create a J2EE Web client.
• Generate the necessary run-time class files.
• Compile the J2EE Web client.
• Package the J2EE Web client.


Deawsj 7 ppt-2_b

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