Agile Development with Smalltalk - Short


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Agile Development with Smalltalk - Short

  1. 1. Agile Development with Smalltalk Tomas Kukol
  2. 2. AgendaThis presentation brings an overview of Smalltalkprogramming language and Smalltalk object databaseand benefits of program and data integration intoobject database
  3. 3. Current situationWe use object oriented languages (C# .NET, Java) Complicated (more than 300 rules), mastering takes 3-4 years Change very often (every 2-3 years in Microsoft .NET) Data persistence is not part of languagesWe use relational databases to store data (Oracle, SQL Server) There are no objects, only plain tables and procedures Different procedural languages, mastering takes also 3-4 years Difficult to be agile and response to business changing needsProblems with separate application and database Business logic is often on more places – hard to maintain Different platforms, languages and tools – takes a lot of time to learn Difficult and time consuming to change existing database and application Frequent changes in all platforms High costs
  4. 4. Possible solution?We should use true object programming language andtrue object database that integrates program anddata, supports agile test driven development,refactoring and quick deploymentHave a look at Smalltalk object programminglanguage and GemStone/S Smalltalk object database
  5. 5. Smalltalk is …Programming language Simple and powerful object language Has only few basic rules and easy to learn Very stable (no breaking changes since 1980)Object database Stores complete objects in object database Application code is together with data in objects Everything is written in Smalltalk languageProductive development environment Integrates all tools for rapid application development Best for web and mobile applications, web services and service oriented architectures
  6. 6. Stability, lower costs, reuseSmalltalk is well designed and easy to learn No breaking changes since 1980 No need to rewrite applications every 2-3 years Mastering Smalltalk takes 6 months vs. 3-4 years of C# .NETPersistence is integrated into Smalltalk Saves 60% – 90% of developer time to handle persistence Developer can focus on real business processes Code and data stored together in objects in object database Only one platform and Smalltalk languageObjects can be reused High reuse of existing code – up to 80% Saves development and maintenance costs Better and stable applications
  7. 7. Agile, test driven, quickly to marketAgile test driven development and refactoring Supports agile and iterative test driven development All kinds of tests are part of Smalltalk program IDE allows refactoring of code together with dataRapid application prototyping Allows rapid application prototyping and frequent changes Contains all development tools with web server and source codes Can be used even on restricted enterprise desktops without special permissions (all in 40 MB)Quick and easy deployment with packages Packages contains all objects, data, tests, examples, documentation Supports different pillars (DEV, ACC, PRO) Built-in concurrent version system, no need for other software (SVN) Can be deployed from web application by authorized user (ISO Admin)