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Saturday, 16 March 2013

web services Introduction



Introduction to web services:

 

TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY

     SPRING-DATA-JPA     REST-WEB-SERVICE     STRUTS2HIBERNATE    GWT.... 




1.What are web services?
2.Types of web servicesa

What are web services?


  •   Web services are client and server applications that communicate over the World Wide Web (WWW) hyper text transfer protocol (HTTP)
  •   As described by the www consortium (W3C), web services provide a standard means of interoperating between software applications running on a variety of platform and frameworks.
  •  Web services are characterized by great interoperability and extensibility, as well as the machine-process able descriptions,
  • Web services can be combined in a loosely coupled way to achieve complex operations.
  •  Programs providing simple services can interactive with each other to deliver sophisticated added value services.

Types of web services:


The two types:
1.big web services
2.restful web services.

  • In java, jax-ws provides the functionally for big web services.
  •   Big web services use XML messages that follow the simple object access protocol (SOAP) standard, an xml language defining a message architecture and message formats.
  •   Such systems often contain a machine-readable description of the operations offered by the service, written in the web services description language (WSDL),and xml language for defining interfaces syntactically.
  •   The soap message format and the WSDL interface definition language have gained widespread adoption.
  •  Many development tools, such as netbeans IDE, can reduce the complexity of developing web service applications. 
  •   A SOAP –based design must include the following elements.
  •   A format contract must be established to describe the interface that the web service offers.
  • WSDL can be used to describe the details of the contract, which may include messages,Operations, bindings, and the location of the web services
  •  In java EE6 ,JAX-RS provides the functionality for representational state transfer(restful) web services.
  •   Rest is well suited for basic, ad hoc integration scenarios.





TUTIORALS FROM MADHAV:

     JAVA-SERVLETS     JAVA-JDBC     JAVA-JSP       HIBERNATE-SHCEMABASED 

    SPRING-AOP-ANNOTATIONS      SPRING -DAO     SPRIN-MVC     SPRING-SECUTITY

     SPRING-DATA-JPA     REST-WEB-SERVICE     STRUTS2HIBERNATE    GWT....

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