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Define tests first. Then develop code to satisfy tests. Lots of ... Specification examples are tests ... Cool Z property: Can calculate minimal preconditions! ...
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BFT prototype: no disk writes NFS server: disk writes for some operations! Explanation: Replication provides redundancy Is this a fair comparison?
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Object-oriented metrics Design decisions: Class Cohesion Open-Closed Single Responsibility Interface Segregation Dependency Inversion Liskov Substitution
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LSP Liskov Substitution Principle (???? ?p??at?stas?? t?? Liskov) ... assert(r- getArea() == 20); ????ta? p??s??se? st?? ???s? Rectangle t? ???d? getArea ...
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3.3 Class Design Principles Single Responsibility Principle (SRP) Open/Closed Principle (OCP) Liskov Substitution Principle (LSP) a.k.a. Design by Contract
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Title: Preventing Upgrade Errors Subject: OOPLA 2003 Author: Barbara Liskov Last modified by: Chandrasekhar Boyapati Created Date: 10/24/2003 4:47:20 PM
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Agenda Introdu o aos padr es de projeto (GoF) Conceitos preliminares Mecanismos de heran a Princ pio de Substitui o de Liskov Acoplamento concreto x ...
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REPLICATION IN THE HARP FILE SYSTEM B. Liskov, S. Ghemawat, R. Gruber, P. Johnson, L. Shrira, M. Williams MIT Paper highlights HARP is a fault-tolerant file system ...
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ciphertext = E(key, tweak, plaintext), plaintext = D(key, tweak, ciphertext) ... Security [Liskov-Rivest-Wagner`02] Attacker has access to E(t,x), D(t,x) ...
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class A. public: void foo(); Extending ... component class hierarchy ... Stable base class Subclassing (Liskov Principle) Requirements change in an ...
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Language: ML (Milner, 1975), Clu (Liskov, 1975) ... Engineering benefits are well-known (code re-use & strong typing) ... Even statics can use type parameter ...
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Replication in the Harp File System, Barbara Liskov, Sanjay Ghemawat, Robert ... Half way between harp and bayou. Replication mostly transparent to end user ...
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Martin Fowler. Open-Closed Principle ... Barabara Liskov and Robert Martin. Dependency Inversion Principle ... Robert Martin. Dependency Inversion Example ...
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Ken Birman, John Connolly, Dan Geer, Barbara Liskov, Peng Liu, Mike Reiter ... Research topic: Develop new protocols that can handle these torrents of data ...
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Or program may actually have bugs. Could ask the programmers ... methods, more general exceptions, workflow, flowmark, Barbara Liskov, vino, ...
* Institute of Computer Software Nanjing University * Agile Processes SCRUM Crystal ... Document presentation ... Strategy Pattern Template Method Pattern ...
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Impact of Research on Middleware Technology Wolfgang Emmerich, Mikio Aoyama & Joe Sventek
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Replicas must execute operations in the same order ... Primary is the replica with id. i = v# mod N. A log of op, op#, status entries ...
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Title: Principles of OOD Author: Rick Mercer Last modified by: mercer Created Date: 3/20/1996 10:57:06 AM Document presentation format: On-screen Show (4:3)
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(Inheritance and Polymorphism) / /
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Post condition rule: What can a subclass do with postconditions in supertype spec? ... Methods rule vs. Properties rule. Methods rule is for single method invocation ...
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Title: Object Orientation Author: YB Last modified by: bi Created Date: 8/20/2005 12:50:13 AM Document presentation format: On-screen Show (4:3) Company
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SOLID is basically a very popular acronym used for writing maintainable, highly cohesive, and extensible software systems. This 5 set of principles was provided by Robert C Martin, also known as Uncle Bob, in the year 2000.
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The Venus operating system. Data Abstraction Prehistory. The Venus machine. The Venus operating system. Programming methodology. Programming Methodology ...
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EECE 310: Software Engineering Type Hierarchies and the Substitution Principle
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... etc.), a home theatre (a big screen TV, a DVD player, a decoder, an amplifier, speakers, etc. ... If a module is cancelled, students are not destroyed. ...
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Ferrari et al.'s model for object-oriented systems. Flow control based on ACL's of objects. ... Express Flexible Flow Control Model Ferrari et al. 22. IFIP11.3-2003 ...
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The complexity of current computer systems have been causing an immense number ... Giuliana Veronese, Miguel Correia, Alyson Bessani, Lau Lung ...
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Title: PowerPoint Presentation Last modified by: USER Created Date: 1/1/1601 12:00:00 AM Document presentation format: Apresenta o na tela Other titles
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Title: Preventing Encapsulation errors Subject: POPL 2003 Author: Chandra Boyapati Last modified by: Chandrasekhar Boyapati Created Date: 7/17/2002 10:50:18 PM
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Title: HQ Replication: A Hybrid Quorum Protocol for Byzantine Fault Tolerance Author: James Cowling Last modified by: James Cowling Created Date
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an army of coders. Finding the Right Problems. Identifying the right problems to address is usually the hardest part of research. ...
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Class Rectangle may be forced to make changes from two different unrelated sources. ... A client should not be forced to depend on methods it does not use. ...
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Ordering Chaos Design II Mike Michael A. Erlinger Today: Design Principles can we define them intro.12.ppt
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Title: Lecture 7: Software Design Quality Author: S M Easterbrook Last modified by: Kersti Wain-Bantin Created Date: 9/30/1999 1:26:51 AM Document presentation format
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Girl. RankedBoy. RankedGirl. March 3rd, 2004. Object Oriented ... No Girl.share(Skier) Java and C do not allow this. Need to check the validity at runtime ...
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You should be able to: describe the open-closed principle, why it matters, and how it applies to object-oriented code. use overloading correctly and recognize ...
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Decorating the code with the aspects before compilation (method used by Cirrus) ... Cirrus exists as a series of Interfaces (callbacks) ...
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State: A 4. State: BFT requires a 2f+1 quorum out of 3f+1 nodes Servers Clients write A write A X write A write A For liveness, the quorum size must be at ...
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ACM Trans. Of Prog. Languages and Systems. Vol 16, No 6, ... The set of methods invoked in p is contained in the union of dom(R). The diamond rule must hold. ...
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Inheritance and object compatibility Object type compatibility An instance of a subclass can be used instead of an instance of the superclass, but not the other way ...
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CSE 301 Exam Revision Lecture harry.erwin@sunderland.ac.uk james.malone@sunderland.ac.uk
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Object-Oriented Analysis, Design and Programming ...
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Attribute and Operation Signatures ... The debit operation in left is declared as private, hence cannot be used by any other object. ...
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(Inheritance and Polymorphism) / /
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I examined several Java textbooks, and discovered Lisokv's Program Development in Java. ... Evangelism. Textbooks. GNAT. etc. 17.6.2003. Ada-Europe'2003. Thank ...
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Anonymous class. Example Questions. What is an iterator ... Proxy. MVC. Iterator. Observer. Example Questions. How might you gather and analyze requirements? ...
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Serialisierung Benedict Fehringer Proseminar Programmiersysteme Betreuer: Guido Tack
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DISTRIBUTED HASH TABLES Building large-scale, robust distributed applications Frans Kaashoek kaashoek@lcs.mit.edu Joint work with: H. Balakrishnan, P. Druschel , J ...
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Question: how does an application create a group? Questions to think about ... PB method. Sender sends msg to sequencer. Sequencer affixes sequence number ...
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Model Checking of. Concurrent Software: Current Projects. Thomas Reps. University of Wisconsin ... University of Wisconsin. Anne Mulhern. Alexey Loginov. Tel ...
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... changes that are hacks rather than software changes that preserve original ... degenerates due to hacks, workarounds, shortcuts, temporary fixes etc. ...
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Ownership Types for Safe Programming Chandrasekhar Boyapati Laboratory for Computer Science Massachusetts Institute of Technology
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Ownership Types for Object Encapsulation. Authors: Chandrasekhar ... A brief digression: const. Consider the following C code: Produces following errors: ...
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'Kerry is a Border Collie which is a kind of a dog' Kerry is an instance of the class Border Collie which is a subclass of the Class ...
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