This document provides an overview of key concepts related to web services, including: what a web service is (a service that allows exchange of data between different systems); common uses of web services like reusing existing applications and communicating across platforms; the main types (simple and complex) and protocols (SOAP, REST, etc.) of web services; how the Web Services Description Language (WSDL) is used to describe web services using XML elements; and that SOAP is an XML-based protocol for exchanging information over HTTP.

1. Web Services
Agenda:
Ø What is a Web Service
Ø Uses of Web Services
Ø Types of Web Services
Ø Web Service protocols
Ø Web Services Description Language (WSDL)
Ø What is SOAP
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2. What is a Web Service
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CLIENT SERVER
Exchange data
JAVA
It is a service to exchange data from different
unknown systems.
C#

3. Uses of Web Services
— Reuse of existing applications
— Communicate or Exchange with different
platforms.
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Currency
ConverterBank of
America
Wells
Fargo AXIS

4. Types of Web Services
— Simple Web services
— Complex Web services
Simple Web services have only simple data types like
integer, string and other types are sent and receive
Complex Web Services are need to configure the ability
to send and receive more than the simple data types.
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5. Web Service protocols
— SOAP
— REST
— BEEP
— JSON-RPC
— XMLL-RPC
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6. Web Services Description Language
(WSDL)
— WSDL is an XML document, used to describe Web services
— It describes major 4 elements
— <types>
— <message>
— <port Type>
— <binding>
We can generate WSDL through IDE or can written manually.
First create WSDL and then developing implementation classes
depends on WSDL called Top-down approach.
Depends on implementation classes creating WSDL is Bottom-up
approach.
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7. — It is a simple XML-base protocol to
access web services or to exchange
information over HTTP.
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What is SOAP
CLIENT SERVER
SOAP Protocol
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