![Models in Software Engineering
▪ Model-driven engineering (MDE) is a software engineering methodology which
focuses on creating and exploiting domain models, which are conceptual models of
all the topics related to a specific problem. [Wikipedia]
▪ Model Driven Engineering, MDE for short, aims to raise the level of abstraction in
program specification and increase automation in program development.](https://image.slidesharecdn.com/8soa-250121165639-c4e6b5c6/85/8-SOA-pptx-soa-ppt-in-software-engineering-11-320.jpg)
8 SOA.pptx soa ppt in software engineering
- 1. What is Service Oriented Architecture (SOA)? SOA is an architecture pattern for developing distributed systems where the system functionality is developed, deployed and utilised as stand-alone software services. Three building blocks of SOA - Service Provider - Service Requester - Service Publisher Typical Examples - Weather Reporting Service - Currency Conversion Service - Language Translation Service - Video Streaming Service Service Provider Service Requester Service Publisher Software Services Publish Subscribe Bind
- 2. Service Oriented Architecture (SOA) Service consumer expresses “intent” Service providers define “offers” Sometimes a mediator will: ▪ Find the best offer matching an intent Service Provider Service Requester Service Publisher Software Services Publish Bind
- 3. SOA – alternative terminologies Service registry Service provider Service requestor lookup bind publish Rental Agency Property Owner Tenant Apartment(size, immediate, cheap) Rental Agreement Property Details
- 4. Software Services A Software Service can be defined as: a loosely-coupled, reusable software component that encapsulates functionality which may be distributed and programmatically accessed. a set of related software functionalities that can be reused for different purposes, together with the policies that should control its usage. A Web Service can be defined as: as a service that is published and accessed using standard Internet and XML- based protocols. Mainframe Client Server World Wide Web SOA
- 5. Key Aspects of Software Services Services can be discovered Services can be composed to form larger services Services adhere to a service contract Services are loosely coupled Services are stateless Services hide their logic Services are reusable Services use open standards Services facilitate interoperability
- 6. Object vs Service (Object-Orientation vs Service Orientation) User Login - ID - Name - getID() - getName() - LoginStatus() User Registration - isRegistered - RegStatus() UserLogin Requester Interface Object Classes Service Provider Interface uses
- 7. Our society has become what it is today through the forces of Specialisation Standardisation Scalability It is now almost exclusively “service” oriented Transportation Telecommunication Retail Healthcare Financial services Service-Orientation in Real World
- 8. Service-Orientation: the Restaurant Analogy ▪Restaurant provides food: a service ▪After the order is taken, food is produced, served, …: service may consist of other services ▪The menu indicates the service provided: a service description ▪The order is written down, or yelled at, the cook: services communicate through messages
- 9. SOA based on Web Services SOA is a means of developing distributed systems where the components are stand-alone services. Services may execute on different computers from different service providers. Document for Translation Translation Services Web Server
- 10. Service-Oriented Software service Engineering Process Service design Service candidate identification Service implementation and deployment Service requirements Service interface specification V alidated and deployed service
- 11. Models in Software Engineering ▪ Model-driven engineering (MDE) is a software engineering methodology which focuses on creating and exploiting domain models, which are conceptual models of all the topics related to a specific problem. [Wikipedia] ▪ Model Driven Engineering, MDE for short, aims to raise the level of abstraction in program specification and increase automation in program development.
- 12. What Exactly is a Model? A model is an abstract representation of a product, service or system that allows us to investigate, verify and document its properties before production
- 13. Model-driven Engineering vs Model-driven Development ▪ Engineering vs Development? ▪ Model Driven Development aims to exploits the models to implement a software system ▪ Model Driven Engineering aims to exploits the models to represents the system requirements and design for system implementation and its evaluation Requirements Design Implementation Evaluation Models
- 15. Tools and Technologies for MDSD Eclipse Modeling Framework (EMF) is an Eclipse-based modeling framework and code generation facility for building tools and other applications based on a structured data model.