SlideServe
Télécharger Obtenir Pro
Menu
Accueil Pro
Préférences
ApparenceLight Aide et commentaires
© SlideServe · v2026

Understanding Application Frameworks: Usage, Learning, Evaluation, and Development Techniques

koto avatar
koto
16 diapositives · 319 Views · Sep 24, 2014

In this comprehensive guide, we explore application frameworks in advanced software engineering. We cover the structure of frameworks, including their parts like concrete subclasses and interaction scripts. Key strategies for using frameworks are discussed, including blackbox, graybox, and whitebox approaches. Additionally, we provide insights into effective learning methods, criteria for evaluating frameworks, and best practices for development. This resource aims to enhance understanding and application of frameworks in software projects, making it indispensable for software engineers and developers.

#understanding application frameworks: usage, learning, evaluation, and development techniques #understanding application frameworks: usage, learning, evaluation, and development techniques ppt #powerpoint #presentation
Understanding Application Frameworks: Usage, Learning, Evaluation, and Development Techniques - slide 1
01 / 16Understanding Application Frameworks: Usage, Learning, Evaluation, and Development Techniques
1 / 17

Télécharger la présentation

Understanding Application Frameworks: Usage, Learning, Evaluation, and Development Techniques
Une image / un lien ci-dessous est fourni (tel quel) pour télécharger la présentation

Politique de téléchargement : le contenu du site vous est fourni TEL QUEL pour votre information et votre usage personnel ; il ne peut être vendu, concédé sous licence ni partagé sur d’autres sites sans l’accord de son auteur.Le contenu vous est fourni TEL QUEL, pour votre information et votre usage personnel uniquement. Téléchargez la présentation en cliquant sur ce lien. Lors du téléchargement, si vous ne parvenez pas à télécharger une présentation, l’éditeur a peut-être supprimé le fichier de son serveur.Pendant le téléchargement, si vous ne parvenez pas à obtenir une présentation, le fichier a peut-être été supprimé par l’éditeur.

F I N

Plus de contenu associé

Transcription de la présentation

  1. Frameworks III Practical Issues CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  2. How to use Application Frameworks • Application developed with Framework has 3 parts: • framework • concrete subclasses • everything else: • script that specified which concrete classes will be used and how they will be interconnected • objects that have not relationship to framework • use one or more framework objects, but not called by framework objects CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  3. “How to’s” for Frameworks • Use • Learn • Evaluate • Develop CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  4. How to use Application Frameworks • Easiest way: Blackbox (e.g., GUI frameworks) • connect existing components • DOES NOT change framework or make any new concrete subclasses • reuses framework’s interfaces and rules for connecting components • Analogous to: • Building from Legos • connected integrated circuits for circuit board • Application programmers only need to know: • type A objects can be connected to type B objects • not need to know exact spec of A and B CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  5. How to use Application Frameworks • Next easiest way: (Graybox) • Define new concrete subclasses; use them to build application • Subclasses are tightly coupled to superclasses: • Requires more knowledge about abstract classes • Subclasses must meet spec implied by superclasses • Programmer must understand framework’s interfaces in detail CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  6. How to use Application Frameworks • Most challenging way: (Whitebox) • Change the abstract classes that form core of framework • add new operations or variables to them • Analogous to fleshing out a skeleton of an application. • Usually requires the source code of framework • Most challenging, but most powerful • Changes to abstract classes can break existing concrete classes CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  7. How to Learn Application Frameworks • Learning a framework is more challenging than learning a class library • not just individual classes • learn a set of classes with specific interconnections • many classes are abstract • Must have concrete examples (easy to challenging) • Documentation should include: • Purpose of framework • How to use framework (e.g., cookbook style) • How the framework works : • interaction between objects • how responsibility is partitioned between objects CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  8. How to Evaluate Application Frameworks • Most application domains have no commercially available domain-specific frameworks • Criteria: • Run on “right” platform • “right” programming language • “right” standards • “Right” tradeoffs between simplicity and power. • Make checklist for objectives of frameworks. • Features that must be supported (e.g., distributed, networking issues, interaction styles, etc.) CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  9. How to Develop Application Frameworks • Design of framework analogous to design of reusable SW • Domain analysis (collect examples) • First version: should implement examples • Usually whitebox • Then use to build applications • Will point out weak points in frameworks • Parts that are hard to change • Experience leads to improvements in framework • Make it more blackbox • Iteration is important: • Domain analysis will gain more information • Framework makes explicit the parts that will change • Components should implement changeable parts • Frameworks are abstractions • Design of framework depends on original examples CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  10. Hooks • Hook: Point in framework meant to be adapted • Filling in parameters • Creating subclasses • Hook Description: • Describes problem/reqt that framework builder anticipates application developer will have • Provides guidance as to how to use hook • Focuses on smal reqt • Details required changes to design • Constraints to be satisfied • Effects on the framework CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  11. Hooks (cont’d) • Adaptation: • Enabling*/disabling a feature • Replacing a feature • Augmenting a feature • Adding a feature* CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  12. Benefits of Frameworks • Modularity: • Encapsulate volatile implementation details behind stable interfaces • Localize impact of design/implementation changes • Reusability: • Stable interfaces enhance reusability of generic components • Leverages domain knowledge/prior experience • Extensibility: • Hook methods that allow applications to extend its stable interfaces • Hook methods decouple stable interfaces and behaviors of an application domain • Inversion of Control: • Application processing customized by event handler objects invoked via framework’s reactive dispatching mechanism • Allow framework (rather than each application) to determine which set of application-specific methods to invoke in response to external events (e.g., window messages from end users or packets arriving on communication ports) CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  13. Classification of Frameworks • System Infrastructure • Middleware Integration • Enterprise application CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  14. System Infrastructure frameworks • Simplify development of portable and efficient system infrastructure: • Examples: • OS (Campbell-Islam 93) • Communication (Schmidt 97) • UI and language processing tools • Primarily used internally within SW org CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  15. Middleware Integration Frameworks • Commonly used to integrate distributed applications and components • Designed to enhance ability of SW developers to modularize, reuse, and extend SW infrastructure in dist env • Examples: • ORB • Message-oriented MW • Transactional databases CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)

  16. Enterprise Application Frameworks • Address broad application domains: • E.g.,: telecommunications, avionics, manufacturing, financial eng., • Expensive to develop/purchase • Good investment: • Support development of end-user applications/products directly • System Infrastructure/Middleware Frameworks: • Focus largely on internal SW development concerns • Contribute significantly to rapid creation of high-quality SW • Not contribute to high revenue for large business orgs. CSE870: Advanced Software Engineering: Cheng (Sp 2001)CSE870: Advanced Software Engineering: Cheng (Sp 2001)