Exposing Web services
How can Web services be used by different services within and outside the application.Web service helps to layer a transport mechanism between any application to any system outside the system. This article provides a view of how web services be used by different services within and outside the application.
The crucial part of a Web service to define the programming model artifacts that makes the Web service portable with the other application is the port component. Using within the application may not be what Web services are intended for as this can be achieved through other means as well. Let us explore the model included in the web service.
The programming model includes:
- A WSDL definition provides the description of a Web service.
- The service endpoint interface (SEI) defines the operations of the Web service.
- A service implementation bean implements the SEI methods to provide the business logic of the Web service. The security role references provide instance-level security checks across different modules.
- Stateless session EJB(EJB container)
- JAX-RPC servlet-based service that invokes a Java Bean, known as a service endpoint (Web container)
Invoking Web services
- A static stub is created before being deployed to the runtime environment.This requires complete knowledge of the WSDL.
- A dynamic proxy class is created during run time. Only a partial WSDL definition is required (port type and bindings).
- A dynamic invocation interface does not require WSDL knowledge. The signature or service name is unknown until run time.
- What is Web Service
- Web Services Tutorial – Setting up environment
- soapUI tutorial
- EJB stateless session bean as web service
- Developing web services -part 1
- Developing web services -part 3
- Developing web services -part 2
- Developing Web Services Contract First Approach
- Exposing Web services
- How can you learn web services in easy steps