1 / 15

Software Engineering and Middleware: a Roadmap by Wolfgang Emmerich

Software Engineering and Middleware: a Roadmap by Wolfgang Emmerich. Ebru Dincel Sahitya Gupta. Distributed Systems. Complex Limited knowledge Multiple points of failure Fault-tolerant Scalable => A better fit for integrated, highly scalable, and adaptable systems. Middleware.

talor
Download Presentation

Software Engineering and Middleware: a Roadmap by Wolfgang Emmerich

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Software Engineering and Middleware: a Roadmapby Wolfgang Emmerich Ebru Dincel Sahitya Gupta

  2. Distributed Systems • Complex • Limited knowledge • Multiple points of failure • Fault-tolerant • Scalable => A better fit for integrated, highly scalable, and adaptable systems

  3. Middleware • Definition: Infrastructure that allow multiple processes to interact across a network. • Context: Distributed systems • Role: Coordination and communication (connectivity software) • Implements: Session & Presentation Layers • Bonus: Higher level primitives

  4. Middleware Requirements Required • Network communication • Coordination • Reliability • Scalability • Heterogeneity Desired • Enhanced security • Application oriented services (transaction monitoring) • Interaction with other network services (security, performance management)

  5. Network Communication • Implement lower level network layers • Provide higher level primitives • Support marshalling & unmarshalling

  6. Coordination • Support concurrent execution by synchronization based on threading policies • Restore component states based on activation policies • Deliver multicast messages

  7. Reliability • Handle individual and multiple requests (transactions) • Accommodate different levels and extensions (reliable delivery, order preservation) • Support replication

  8. Scalability • Load Balancing -Access transparency -Location transparency -Migration transparency -Replication transparency

  9. Heterogeneity • Integrate elements from various contexts -hardware -software -operating system -middleware • Support interoperability

  10. Middleware Solutions

  11. Middleware Solutions

  12. Middleware State of the Art • Flexible Middleware -Trading -Reflection -Application-level Transport Protocol • Scalable Middleware -Replication • Real-time Middleware - Lack on prioritization on requests - High memory requirements • Middleware for Mobile Computing - Lack of continuous bandwidth availability - Problems of network outages - Increased complexity of software and size efficient data representation

  13. Academic Solutions • Brown University (Field) • University of Colorado (Q) • University of Maryland (Polylith) • Washington University (TAO) • Vrije University (Globe)

  14. Future Research • Requirements Engineering -quantification of non-functional goals -adaptation to unstable requirements • Software Architecture -addressing global properties and non functional requirements -calibrated models for validation -development of middleware oriented ADLs • Design -development of middleware design notations, methods, and tools

  15. Middleware in Embedded Software • Embedded software -specialized -demanding QoS on certain subdomains (telecommunications, multimedia, command control systems) • Middleware -simplify composition and configuration of distributed systems -limitations exist (lack of real-time features & prioritization, performance optimizations, non-functional requirement support, heavy memory requirements, -future promising (industry supported flexible, adaptable, optimized, and standardized infrastructures, e.g Real-time CORBA, TAO)

More Related