Frameworks are general code libraries that developers use to build their software on. Frameworks are usually specific to a domain, like web frameworks or database frameworks. The benefit of frameworks is the productivity that they provide. With the right framework we can avoid writing low-level functionality and instead focus on our domain problems we need to solve. Frameworks are building blocks and should be used as such, if you have a bad framework or need to invest too much into using the framework, the gains are counter productive.
It may be a good strategy to write your own framework, and in the lecture we look at design patterns that are useful in creating frameworks. We will also look at the Spring framework that is a good example of a well design framework.
Cover image by Javier Corbo
http://www.flickr.com/photos/javiercorbo/
Processes are programs that run in data centers and have the role of executing specific tasks. They can be scheduled, triggered by an event or run manually. These programs handle task such as importing and exporting, reconciliation, daily updates and calculations and thing like that. Processes usually have no user interface except they log their progress to a log file.
In this lecture we create a process framework based on some of the design patterns we have covered. The idea is that this framework can be used to build processes, and as an example we create process call Import Content Process that reads RSS entries form a new site.
We also look briefly at XML.
This document discusses frameworks and design patterns used in frameworks. It introduces common framework patterns like inversion of control, dependency injection, template method, and strategy patterns. It provides examples of how these patterns are used in frameworks, including a sample framework that uses dependency injection and strategy patterns. The document also discusses benefits and drawbacks of using frameworks.
[DSBW Spring 2009] Unit 07: WebApp Design Patterns & Frameworks (1/3)Carles Farré
The document discusses various design patterns and frameworks related to web application development. It begins by describing the Model-View-Controller (MVC) pattern, which divides an application into three main components: the model, the view, and the controller. It then provides details on different MVC-based patterns such as the classical MVC pattern, page controller pattern, front controller pattern, application controller pattern, and intercepting filter pattern. The document also discusses view-related patterns like view helpers as well as MVC web frameworks.
Rammar eru almennar aðgerðir og aðferðir sem nota má til að búa til sértækan hugbúnað. Með römmum má endurnýta kóða sem alltaf er eins eða nánast alltaf er eins. Það sem er sérhæft eru ákveðin viðfangsefni en útfærsla á þeim notar rammann. Við skilgreinum ramma og skoðum kosti og galla.
Við skoðum einnig létta gáma eða lightweight containers sem eru forrit sem sjá um lífshlaup (live-cycle) hluta og umhverfi þeirra (context). Þá skoðum við munstrið Dependency Injection sem er mjög hentugt í römmum.
Einnig skoðum við Template Method og Strategy munstrin.
The document discusses aspect-oriented programming (AOP) and key AOP concepts like joinpoints, pointcuts, advice, and aspects. It explains how AOP addresses cross-cutting concerns in code through separation of concerns using pointcuts, advice, and aspects rather than scattering code throughout a system. The document also provides examples of how to configure AOP using Spring AOP through pointcuts, advice definitions, and proxies.
Spring AOP allows for aspect-oriented programming in Spring applications. It provides a way to separate cross-cutting concerns like logging, security and caching into reusable modules called aspects. Aspects define advices that specify actions to be taken at certain join points during execution of methods. The main AOP concepts are aspects, advices, join points, pointcuts and weaving. Advices like before, after, around etc allow code to run before, after or around method executions. Pointcuts define which method executions match, allowing advices to be selectively applied based on method signatures or argument types. Weaving is the process of integrating aspects into classes at compile-time, load-time or runtime.
Apache maven, a software project management toolRenato Primavera
This document discusses Apache Maven, an open-source tool for managing software projects and automating common software project tasks such as compiling source code, running tests, packaging, and deploying artifacts. It describes how Maven uses a Project Object Model (POM) file to manage a project's build, reporting and documentation from a central configuration. It also outlines key Maven concepts like the POM, lifecycles, phases, dependencies, repositories, inheritance, and multi-module projects.
Aspect-Oriented Programming (AOP) complements Object-Oriented Programming (OOP) by providing another way of thinking about program structure. The key unit of modularity in OOP is the class, whereas in AOP the unit of modularity is the aspect. Aspects enable the modularization of concerns such as transaction management that cut across multiple types and objects. (Such concerns are often termed crosscutting concerns in AOP literature.)
One of the key components of Spring is the AOP framework. While the Spring IoC container does not depend on AOP, meaning you do not need to use AOP if you don't want to, AOP complements Spring IoC to provide a very capable middleware solution.
Processes are programs that run in data centers and have the role of executing specific tasks. They can be scheduled, triggered by an event or run manually. These programs handle task such as importing and exporting, reconciliation, daily updates and calculations and thing like that. Processes usually have no user interface except they log their progress to a log file.
In this lecture we create a process framework based on some of the design patterns we have covered. The idea is that this framework can be used to build processes, and as an example we create process call Import Content Process that reads RSS entries form a new site.
We also look briefly at XML.
This document discusses frameworks and design patterns used in frameworks. It introduces common framework patterns like inversion of control, dependency injection, template method, and strategy patterns. It provides examples of how these patterns are used in frameworks, including a sample framework that uses dependency injection and strategy patterns. The document also discusses benefits and drawbacks of using frameworks.
[DSBW Spring 2009] Unit 07: WebApp Design Patterns & Frameworks (1/3)Carles Farré
The document discusses various design patterns and frameworks related to web application development. It begins by describing the Model-View-Controller (MVC) pattern, which divides an application into three main components: the model, the view, and the controller. It then provides details on different MVC-based patterns such as the classical MVC pattern, page controller pattern, front controller pattern, application controller pattern, and intercepting filter pattern. The document also discusses view-related patterns like view helpers as well as MVC web frameworks.
Rammar eru almennar aðgerðir og aðferðir sem nota má til að búa til sértækan hugbúnað. Með römmum má endurnýta kóða sem alltaf er eins eða nánast alltaf er eins. Það sem er sérhæft eru ákveðin viðfangsefni en útfærsla á þeim notar rammann. Við skilgreinum ramma og skoðum kosti og galla.
Við skoðum einnig létta gáma eða lightweight containers sem eru forrit sem sjá um lífshlaup (live-cycle) hluta og umhverfi þeirra (context). Þá skoðum við munstrið Dependency Injection sem er mjög hentugt í römmum.
Einnig skoðum við Template Method og Strategy munstrin.
The document discusses aspect-oriented programming (AOP) and key AOP concepts like joinpoints, pointcuts, advice, and aspects. It explains how AOP addresses cross-cutting concerns in code through separation of concerns using pointcuts, advice, and aspects rather than scattering code throughout a system. The document also provides examples of how to configure AOP using Spring AOP through pointcuts, advice definitions, and proxies.
Spring AOP allows for aspect-oriented programming in Spring applications. It provides a way to separate cross-cutting concerns like logging, security and caching into reusable modules called aspects. Aspects define advices that specify actions to be taken at certain join points during execution of methods. The main AOP concepts are aspects, advices, join points, pointcuts and weaving. Advices like before, after, around etc allow code to run before, after or around method executions. Pointcuts define which method executions match, allowing advices to be selectively applied based on method signatures or argument types. Weaving is the process of integrating aspects into classes at compile-time, load-time or runtime.
Apache maven, a software project management toolRenato Primavera
This document discusses Apache Maven, an open-source tool for managing software projects and automating common software project tasks such as compiling source code, running tests, packaging, and deploying artifacts. It describes how Maven uses a Project Object Model (POM) file to manage a project's build, reporting and documentation from a central configuration. It also outlines key Maven concepts like the POM, lifecycles, phases, dependencies, repositories, inheritance, and multi-module projects.
Aspect-Oriented Programming (AOP) complements Object-Oriented Programming (OOP) by providing another way of thinking about program structure. The key unit of modularity in OOP is the class, whereas in AOP the unit of modularity is the aspect. Aspects enable the modularization of concerns such as transaction management that cut across multiple types and objects. (Such concerns are often termed crosscutting concerns in AOP literature.)
One of the key components of Spring is the AOP framework. While the Spring IoC container does not depend on AOP, meaning you do not need to use AOP if you don't want to, AOP complements Spring IoC to provide a very capable middleware solution.
Design and Implementation patterns have changed in object-oriented languages such as C# with the introduction of new language features, advances in object-oriented design, and the inclusion of functional language aspects. This session will explore the impact this has on design and implementation patterns and how they can be leveraged to build more elegant systems.
This document discusses data access with JDBC using the Spring Framework. It covers Spring's DAO support, exception handling, and approaches for database access including JdbcTemplate, NamedParameterJdbcTemplate, and controlling connections through a DataSource. The core classes provided by Spring simplify JDBC usage and handle common database tasks like opening/closing connections and transactions.
Java annotations allow metadata to be added to Java code elements like classes, methods, and fields. This metadata can be read by tools and libraries to affect how the code is processed. Common built-in annotations include @Deprecated, @Override, and @SuppressWarnings. Annotations can also be applied to other annotations to specify how they function, such as their retention policy or valid targets. As an example, the document describes how to build a simple annotation-based test framework using the @Test annotation to mark test methods.
The document discusses design patterns and how they can be used to simplify complex object models. It introduces the composite, adapter, bridge, and facade patterns. The composite pattern models tree structures and allows components to be treated uniformly. The adapter pattern allows classes with incompatible interfaces to work together. The bridge pattern decouples an abstraction from its implementation. The facade pattern provides a simplified interface to a subsystem. Design patterns use inheritance and delegation to provide flexible, reusable solutions to common programming problems.
This document discusses the evolution of Java EE from J2EE and how Java EE 5 makes enterprise application development easier. Some key ways it does this include introducing annotations for declarative programming, simplifying packaging rules, and introducing new APIs and frameworks like EJB 3.0, JPA, JAX-WS 2.0, and JSF 1.2. The document also covers features of Java EE 5 like dependency injection and how annotations are used throughout the platform.
Model-Driven Development in the context of Software Product LinesMarkus Voelter
Domain specific languages, together with code generation or interpreters (a.k.a. model-driven development), are becoming more and more important. Since there is a certain overhead involved in building languages and processors, this approach is especially useful in environments where a spe-cific set of languages and generators can be reused many times. Product lines are such an environment. Consequently, the use of domain specific languages (DSLs) for Software Product Line Engi-neering (SPLE) is becoming more relevant. However, exploiting DSLs in the context of product lines involves more than just defining and using languages. This tutorial explains the differences as well as commonalities between model-driven development (MDD) and SPLE and shows how the two approaches can be combined. In this tutorial we will first recap/introduce feature modeling and model-driven development. We then build a simple textual DSL and a code generator based on Eclipse openArchitectureWare (oAW). Based on this language we’ll discuss the kinds of variability expressible via DSLs versus those expressible via feature modeling, leading to a discussion about ways to combine the two. In the next demo slot we’ll do just that: we’ll annotate a model with feature dependencies. When generating code, the elements whose features are not selected will be removed, and hence no code will be generated. Finally we’ll discuss and demo the integration feature dependencies into code generators to con-figure the kind of code generated from the model.
Towards Improving Interface Modularity in Legacy Java Software Through Automa...Raffi Khatchadourian
The skeletal implementation pattern is a software design pattern
consisting of defining an abstract class that provides a partial interface implementation. However, since Java allows only single class inheritance, if implementers decide to extend a skeletal implementation, they will not be allowed to extend any other class. Also, discovering the skeletal implementation may require a global analysis. Java 8 enhanced interfaces alleviate these problems by allowing interfaces to contain (default) method implementations, which implementers inherit. Java classes are then free to extend a different class, and a separate abstract class is no longer needed; developers considering implementing an interface need only examine the interface itself. We argue that both these benefits improve software modularity, and discuss our ongoing work in developing an automated refactoring tool that would assist developers in taking advantage of the enhanced interface feature for their legacy Java software.
Automated Refactoring of Legacy Java Software to Default Methods Talk at ICSE...Raffi Khatchadourian
Java 8 default methods, which allow interfaces to contain (instance) method implementations, are useful for the skeletal implementation software design pattern. However, it is not easy to transform existing software to exploit default methods as it requires analyzing complex type hierarchies, resolving multiple implementation inheritance issues, reconciling differences between class and interface methods, and analyzing tie-breakers (dispatch precedence) with overriding class methods to preserve type-correctness and confirm semantics preservation. In this paper, we present an efficient, fully-automated, type constraint-based refactoring approach that assists developers in taking advantage of enhanced interfaces for their legacy Java software. The approach features an extensive rule set that covers various corner-cases where default methods cannot be used. To demonstrate applicability, we implemented our approach as an Eclipse plug-in and applied it to 19 real-world Java projects, as well as submitted pull requests to popular GitHub repositories. The indication is that it is useful in migrating skeletal implementation methods to interfaces as default methods, sheds light onto the pattern’s usage, and provides insight to language designers on how this new construct applies to existing software.
This document provides an overview of different view elements in the PHP5 MVC framework symfony including partials, slots, components, and component slots. Partials allow reusable template code, slots act as placeholders for content, components combine logic and presentation, and component slots vary a component's content based on the calling module. The summary explains how to use each element and their relationships.
Ad103 - Have it Your Way: Extending IBM Lotus Domino Designerddrschiw
With release 8.5.1, the new Lotus Domino Designer Extension API supports custom extensions to operate on selections of design elements. We'll details several sample applications; 1) validate references to views, forms, etc in XPages and Custom controls, 2) re-factoring tool to rename a design element and update references, 3) synchronize files between NSF and local file system (stylesheets, etc) and 4) select a form, create view with all fields from the form. We'll provide boilerplate code for common types of plugins, so you can just add your own code. You'll see how
to control whether your extension is visible/enabled based on selection contents - visit openntf.org for more! After attending this session, you can make your own contributions!
Automated Refactoring of Legacy Java Software to Default Methods Talk at GMURaffi Khatchadourian
Java 8 default methods, which allow interfaces to contain (instance) method implementations, are useful for the skeletal implementation software design pattern. However, it is not easy to transform existing software to exploit default methods. In this talk, I discuss an efficient, fully-automated, type constraint-based refactoring approach that assists developers in taking advantage of enhanced interfaces for their legacy Java software.
The document discusses dependency management in Maven projects. It introduces the pom.xml file, which defines dependencies, plugins, and other build settings. It covers key parts of the pom.xml file like coordinates, dependencies, inheritance, and properties. It also demonstrates how to define modules, resources, and plugins in the pom.xml file.
Test-driven development (TDD) involves writing unit tests before writing code to help ensure code quality and avoid omitted tests. The document discusses the NUnit testing framework for .NET, which uses attributes to identify test fixtures, methods, and setup/teardown functionality. It also covers how to write tests using assertions and run tests using the NUnit GUI or console applications.
This document outlines the contents of a book on Java/J2EE interview questions and answers. It covers key topics like Java language fundamentals, Swing, Applets, J2EE, Servlets, JSP, EJB, JDBC, XML and more. The book provides sample questions and answers on these topics that may be asked in interviews. It also has sections on emerging technologies, sample questions, and how to approach common tasks like application design, documentation, performance tuning and security. The goal is to help readers prepare for Java/J2EE related job interviews.
An applet is a Java program that runs in a web browser. It is embedded in an HTML page and runs in the Java Virtual Machine (JVM). To create an applet, a class must extend the Applet class. The applet lifecycle includes initialization, starting, painting, stopping, and destruction. Applets allow Java programs to be run from web pages and have graphical user interfaces.
Poster on Automated Refactoring of Legacy Java Software to Default MethodsRaffi Khatchadourian
The document describes an automated refactoring approach that uses type constraints to migrate legacy Java code using the skeletal implementation pattern to default methods. It presents a motivating example and describes how type constraints are used to determine if a migration will be valid. An evaluation on 19 open source projects found the tool was able to refactor over 19% of candidate methods. A preliminary study submitting pull requests found some were merged but others were rejected due to supporting older clients.
Project FoX: A Tool That Offers Automated Testing Using a Formal ApproachIvo Neskovic
"Software Testing is the process of executing a program or system with the intent of finding errors.", Myers, 1979. The most important activity in this process is designing the required set of effective test cases. Thus, the problem is narrowed down to determining the exact number of required test cases and increasing their effectiveness.
Project FoX is a production ready tool developed in Java, which offers Java developers the opportunity to leverage the proven theories and concepts of formal testing using generalized state automata (X-Machines) as a theoretical model of computation. The formal testing strategy FoX is applying, is proven to generate a complete test set that ensures the correctness of the implementation with respect to the specification.
FoX enhances a novel testing process that is fully automated, ranging from complete test set generation, to test preparation and execution. This method can be applied to any Java based software system, regardless of its underlying technologies. Utilizing a formal approach will provide unambiguous test cases which are objective and not subjective to the tester’s experience and intuition.
The formal testing strategy provides functional testing that tests not only for the desired system behaviour (the system does what it should) but also tests that the system has no undesired behaviour (the system does not do anything it should not do).
This short presentation will strive to give the audience an overview of the formal testing methodology and a demonstration of the tool (FoX). It will also showcase a real-life demo of the project FoX, applied to a Java SE application and will discuss how the methodology can be applied to any Java EE or ME application.
Anyone with a software engineering background will be able to easily follow the talk and understand the benefits which this process offers to modern day software engineering.
Framework design involves balancing many considerations, such as:
- Managing dependencies between components to allow for flexibility and evolution over time. Techniques like dependency injection and layering help achieve this.
- Designing APIs by first writing code samples for key scenarios and defining object models to support these samples to ensure usability.
- Treating simplicity as a feature by removing unnecessary requirements and reusing existing concepts where possible.
This document provides an overview of the Java programming language. It discusses Java's history and why it was created. It also outlines some of Java's key fundamentals like variables, data types, operators, and control statements. Additionally, it covers object-oriented programming concepts in Java like classes, objects, inheritance and encapsulation. The document is intended to help readers get started with learning Java.
Design Pattern Mastery - Momentum Dev Con 19 Apr 2018Steven Smith
Design patterns help developers and teams solve problems using proven approaches. In this talk, you'll learn how to solve a series of real world problems by applying patterns. Not only do patterns help individual developers solve particular problems, but they also enable teams to discuss design decisions using a richer, more descriptive language. By the end, you'll have some concrete tools you can apply, and hopefully the desire to master more patterns as you continue to improve!
The document discusses several design patterns including Singleton, Factory Method, Strategy, and others. It provides descriptions of the patterns, examples of how they can be implemented in code, and discusses how some patterns like Singleton can be adapted for multi-threaded applications. It also briefly introduces the Multiton pattern, which is an extension of Singleton that allows multiple instances associated with different keys.
Design and Implementation patterns have changed in object-oriented languages such as C# with the introduction of new language features, advances in object-oriented design, and the inclusion of functional language aspects. This session will explore the impact this has on design and implementation patterns and how they can be leveraged to build more elegant systems.
This document discusses data access with JDBC using the Spring Framework. It covers Spring's DAO support, exception handling, and approaches for database access including JdbcTemplate, NamedParameterJdbcTemplate, and controlling connections through a DataSource. The core classes provided by Spring simplify JDBC usage and handle common database tasks like opening/closing connections and transactions.
Java annotations allow metadata to be added to Java code elements like classes, methods, and fields. This metadata can be read by tools and libraries to affect how the code is processed. Common built-in annotations include @Deprecated, @Override, and @SuppressWarnings. Annotations can also be applied to other annotations to specify how they function, such as their retention policy or valid targets. As an example, the document describes how to build a simple annotation-based test framework using the @Test annotation to mark test methods.
The document discusses design patterns and how they can be used to simplify complex object models. It introduces the composite, adapter, bridge, and facade patterns. The composite pattern models tree structures and allows components to be treated uniformly. The adapter pattern allows classes with incompatible interfaces to work together. The bridge pattern decouples an abstraction from its implementation. The facade pattern provides a simplified interface to a subsystem. Design patterns use inheritance and delegation to provide flexible, reusable solutions to common programming problems.
This document discusses the evolution of Java EE from J2EE and how Java EE 5 makes enterprise application development easier. Some key ways it does this include introducing annotations for declarative programming, simplifying packaging rules, and introducing new APIs and frameworks like EJB 3.0, JPA, JAX-WS 2.0, and JSF 1.2. The document also covers features of Java EE 5 like dependency injection and how annotations are used throughout the platform.
Model-Driven Development in the context of Software Product LinesMarkus Voelter
Domain specific languages, together with code generation or interpreters (a.k.a. model-driven development), are becoming more and more important. Since there is a certain overhead involved in building languages and processors, this approach is especially useful in environments where a spe-cific set of languages and generators can be reused many times. Product lines are such an environment. Consequently, the use of domain specific languages (DSLs) for Software Product Line Engi-neering (SPLE) is becoming more relevant. However, exploiting DSLs in the context of product lines involves more than just defining and using languages. This tutorial explains the differences as well as commonalities between model-driven development (MDD) and SPLE and shows how the two approaches can be combined. In this tutorial we will first recap/introduce feature modeling and model-driven development. We then build a simple textual DSL and a code generator based on Eclipse openArchitectureWare (oAW). Based on this language we’ll discuss the kinds of variability expressible via DSLs versus those expressible via feature modeling, leading to a discussion about ways to combine the two. In the next demo slot we’ll do just that: we’ll annotate a model with feature dependencies. When generating code, the elements whose features are not selected will be removed, and hence no code will be generated. Finally we’ll discuss and demo the integration feature dependencies into code generators to con-figure the kind of code generated from the model.
Towards Improving Interface Modularity in Legacy Java Software Through Automa...Raffi Khatchadourian
The skeletal implementation pattern is a software design pattern
consisting of defining an abstract class that provides a partial interface implementation. However, since Java allows only single class inheritance, if implementers decide to extend a skeletal implementation, they will not be allowed to extend any other class. Also, discovering the skeletal implementation may require a global analysis. Java 8 enhanced interfaces alleviate these problems by allowing interfaces to contain (default) method implementations, which implementers inherit. Java classes are then free to extend a different class, and a separate abstract class is no longer needed; developers considering implementing an interface need only examine the interface itself. We argue that both these benefits improve software modularity, and discuss our ongoing work in developing an automated refactoring tool that would assist developers in taking advantage of the enhanced interface feature for their legacy Java software.
Automated Refactoring of Legacy Java Software to Default Methods Talk at ICSE...Raffi Khatchadourian
Java 8 default methods, which allow interfaces to contain (instance) method implementations, are useful for the skeletal implementation software design pattern. However, it is not easy to transform existing software to exploit default methods as it requires analyzing complex type hierarchies, resolving multiple implementation inheritance issues, reconciling differences between class and interface methods, and analyzing tie-breakers (dispatch precedence) with overriding class methods to preserve type-correctness and confirm semantics preservation. In this paper, we present an efficient, fully-automated, type constraint-based refactoring approach that assists developers in taking advantage of enhanced interfaces for their legacy Java software. The approach features an extensive rule set that covers various corner-cases where default methods cannot be used. To demonstrate applicability, we implemented our approach as an Eclipse plug-in and applied it to 19 real-world Java projects, as well as submitted pull requests to popular GitHub repositories. The indication is that it is useful in migrating skeletal implementation methods to interfaces as default methods, sheds light onto the pattern’s usage, and provides insight to language designers on how this new construct applies to existing software.
This document provides an overview of different view elements in the PHP5 MVC framework symfony including partials, slots, components, and component slots. Partials allow reusable template code, slots act as placeholders for content, components combine logic and presentation, and component slots vary a component's content based on the calling module. The summary explains how to use each element and their relationships.
Ad103 - Have it Your Way: Extending IBM Lotus Domino Designerddrschiw
With release 8.5.1, the new Lotus Domino Designer Extension API supports custom extensions to operate on selections of design elements. We'll details several sample applications; 1) validate references to views, forms, etc in XPages and Custom controls, 2) re-factoring tool to rename a design element and update references, 3) synchronize files between NSF and local file system (stylesheets, etc) and 4) select a form, create view with all fields from the form. We'll provide boilerplate code for common types of plugins, so you can just add your own code. You'll see how
to control whether your extension is visible/enabled based on selection contents - visit openntf.org for more! After attending this session, you can make your own contributions!
Automated Refactoring of Legacy Java Software to Default Methods Talk at GMURaffi Khatchadourian
Java 8 default methods, which allow interfaces to contain (instance) method implementations, are useful for the skeletal implementation software design pattern. However, it is not easy to transform existing software to exploit default methods. In this talk, I discuss an efficient, fully-automated, type constraint-based refactoring approach that assists developers in taking advantage of enhanced interfaces for their legacy Java software.
The document discusses dependency management in Maven projects. It introduces the pom.xml file, which defines dependencies, plugins, and other build settings. It covers key parts of the pom.xml file like coordinates, dependencies, inheritance, and properties. It also demonstrates how to define modules, resources, and plugins in the pom.xml file.
Test-driven development (TDD) involves writing unit tests before writing code to help ensure code quality and avoid omitted tests. The document discusses the NUnit testing framework for .NET, which uses attributes to identify test fixtures, methods, and setup/teardown functionality. It also covers how to write tests using assertions and run tests using the NUnit GUI or console applications.
This document outlines the contents of a book on Java/J2EE interview questions and answers. It covers key topics like Java language fundamentals, Swing, Applets, J2EE, Servlets, JSP, EJB, JDBC, XML and more. The book provides sample questions and answers on these topics that may be asked in interviews. It also has sections on emerging technologies, sample questions, and how to approach common tasks like application design, documentation, performance tuning and security. The goal is to help readers prepare for Java/J2EE related job interviews.
An applet is a Java program that runs in a web browser. It is embedded in an HTML page and runs in the Java Virtual Machine (JVM). To create an applet, a class must extend the Applet class. The applet lifecycle includes initialization, starting, painting, stopping, and destruction. Applets allow Java programs to be run from web pages and have graphical user interfaces.
Poster on Automated Refactoring of Legacy Java Software to Default MethodsRaffi Khatchadourian
The document describes an automated refactoring approach that uses type constraints to migrate legacy Java code using the skeletal implementation pattern to default methods. It presents a motivating example and describes how type constraints are used to determine if a migration will be valid. An evaluation on 19 open source projects found the tool was able to refactor over 19% of candidate methods. A preliminary study submitting pull requests found some were merged but others were rejected due to supporting older clients.
Project FoX: A Tool That Offers Automated Testing Using a Formal ApproachIvo Neskovic
"Software Testing is the process of executing a program or system with the intent of finding errors.", Myers, 1979. The most important activity in this process is designing the required set of effective test cases. Thus, the problem is narrowed down to determining the exact number of required test cases and increasing their effectiveness.
Project FoX is a production ready tool developed in Java, which offers Java developers the opportunity to leverage the proven theories and concepts of formal testing using generalized state automata (X-Machines) as a theoretical model of computation. The formal testing strategy FoX is applying, is proven to generate a complete test set that ensures the correctness of the implementation with respect to the specification.
FoX enhances a novel testing process that is fully automated, ranging from complete test set generation, to test preparation and execution. This method can be applied to any Java based software system, regardless of its underlying technologies. Utilizing a formal approach will provide unambiguous test cases which are objective and not subjective to the tester’s experience and intuition.
The formal testing strategy provides functional testing that tests not only for the desired system behaviour (the system does what it should) but also tests that the system has no undesired behaviour (the system does not do anything it should not do).
This short presentation will strive to give the audience an overview of the formal testing methodology and a demonstration of the tool (FoX). It will also showcase a real-life demo of the project FoX, applied to a Java SE application and will discuss how the methodology can be applied to any Java EE or ME application.
Anyone with a software engineering background will be able to easily follow the talk and understand the benefits which this process offers to modern day software engineering.
Framework design involves balancing many considerations, such as:
- Managing dependencies between components to allow for flexibility and evolution over time. Techniques like dependency injection and layering help achieve this.
- Designing APIs by first writing code samples for key scenarios and defining object models to support these samples to ensure usability.
- Treating simplicity as a feature by removing unnecessary requirements and reusing existing concepts where possible.
This document provides an overview of the Java programming language. It discusses Java's history and why it was created. It also outlines some of Java's key fundamentals like variables, data types, operators, and control statements. Additionally, it covers object-oriented programming concepts in Java like classes, objects, inheritance and encapsulation. The document is intended to help readers get started with learning Java.
Design Pattern Mastery - Momentum Dev Con 19 Apr 2018Steven Smith
Design patterns help developers and teams solve problems using proven approaches. In this talk, you'll learn how to solve a series of real world problems by applying patterns. Not only do patterns help individual developers solve particular problems, but they also enable teams to discuss design decisions using a richer, more descriptive language. By the end, you'll have some concrete tools you can apply, and hopefully the desire to master more patterns as you continue to improve!
The document discusses several design patterns including Singleton, Factory Method, Strategy, and others. It provides descriptions of the patterns, examples of how they can be implemented in code, and discusses how some patterns like Singleton can be adapted for multi-threaded applications. It also briefly introduces the Multiton pattern, which is an extension of Singleton that allows multiple instances associated with different keys.
Design patterns provide common templates for solving similar problems. They also provide a higher-level language for software developers to use to describe approaches they might choose when designing part of an application. This session introduces and applies several patterns useful to web application developers. Examples will primarily use C#/.NET.
This document provides an introduction to design patterns, including their motivation, history, definition, categories, and examples. Some key points:
- Design patterns solve common programming problems by describing reusable solutions that can be adapted for different situations.
- Common categories include creational, structural, and behavioral patterns. Example patterns discussed are Singleton, Decorator, Abstract Factory.
- Design patterns speed up development, promote code reuse, and make software more robust, maintainable and extensible. Resources for further information on design patterns are provided.
The document discusses various design principles and patterns in Java including the Singleton, Factory Method, Prototype, and Abstract Factory patterns. It provides examples of when and how to apply each pattern, describing their structures, participants, collaborations and consequences. It also covers design principles such as the open-closed principle, dependency inversion, and interface segregation.
This document provides an overview of polymorphism in object-oriented programming. It discusses:
1) Polymorphism allows the same method invocation to produce different results depending on the type of object, enabling "programming to the general type."
2) When a method is called through a superclass variable, the correct subclass version is called based on the object's type, not the variable type.
3) Polymorphism promotes extensibility by allowing new object types to respond to existing method calls without modifying existing code.
Design patterns provide general reusable solutions to common problems in software design. They help structure code and define the way components interact. Some key design patterns discussed in the document include Singleton, Strategy, Decorator, and State. The Singleton pattern ensures a class only has one instance, Strategy encapsulates algorithms to allow flexible changes, Decorator adds functionality dynamically at runtime, and State changes object behavior based on its internal state. Design patterns improve code organization, reuse, and maintenance.
This document discusses polymorphism and object-oriented programming concepts. It begins by introducing polymorphism and how it allows the same method invocation to produce different results depending on the object type. It then discusses abstract classes and interfaces, explaining that abstract classes declare common attributes and behaviors for subclasses to implement, while interfaces define common method signatures without implementation. The document provides examples of polymorphism in class hierarchies, demonstrating how invoking methods through a superclass reference causes the correct subclass version to be called based on the object's type.
The document discusses reflection in programming, specifically in Java. It provides an overview of reflection, its advantages like enabling polymorphism and creating adaptable code, and its disadvantages like reduced performance and increased complexity. It also discusses proper uses of reflection, like in development tools, and misuses, like when interfaces could enable the same functionality more cleanly. An example is provided to demonstrate how to use reflection in Java to inspect class details at runtime.
Design patterns are known and tested solutions to common problem. In software engineering we constantly come across similar problems. The same problems or tasks need to be programmed again and again, hence patterns. Design patterns catalog and document these solutions.They are built on industry knowledge of what works and why. We will look at what design patterns are, their history and the structure of documenting patterns.
As an example we look at the Observer pattern.
We will also look at Liskov Substitution Principle and the Open Close Principle, both which are very useful in building enterprise systems. Finally we look at creating objects.
This document provides an overview of object oriented software modeling and design patterns. It discusses the purpose of design patterns in providing common solutions to recurring problems in software design. The document outlines different types of patterns (creational, structural, behavioral) and provides examples of specific patterns like factory pattern, singleton pattern, facade pattern, MVC pattern, observer pattern, and chain of responsibility pattern. It explains the problem each pattern addresses and the elements that make up the design solution.
This document discusses several software design patterns including behavioral patterns like the strategy pattern, template pattern, and iterator pattern. It provides code examples to illustrate how each pattern can be implemented in Java. The strategy pattern encapsulates algorithms and makes them interchangeable. The template pattern defines a skeleton for subclasses. The iterator pattern accesses elements of a collection without exposing its internal structure.
.NET Core, ASP.NET Core Course, Session 9aminmesbahi
This document provides an overview of controllers and filters in ASP.NET Core MVC. It defines controllers as classes that handle browser requests, retrieve model data, and specify view templates. Actions are public methods on controllers that handle requests. Filters allow running code before and after stages of the execution pipeline and can be used to handle concerns like authorization, caching, and exception handling. The document discusses implementing different filter types, configuring filters through attributes and dependency injection, and controlling filter order.
The document discusses various design patterns. It begins by explaining that design patterns represent best practices used by experienced software developers to solve common problems. It then discusses the Gang of Four (GOF) patterns, which were identified in 1994 and include creational, structural, and behavioral patterns. Creational patterns like Singleton, Factory Method, Abstract Factory, and Prototype are covered. Structural patterns like Adapter, Bridge, Composite, Decorator, Facade, Flyweight, and Proxy are also introduced. Behavioral patterns like Chain of Responsibility, Command, Interpreter, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, and Visitor are briefly mentioned as well. The document then discusses some Java Enterprise
The document discusses various design patterns including the Template Method, Strategy, Observer, Composite, Iterator, Command, Adapter, Proxy, Decorator, Singleton, Factory, Builder, Interpreter, Domain Specific Language (DSL), Meta-programming, and Convention over Configuration patterns. It provides examples and descriptions of when each pattern would be used.
Spring boot is a suite, pre-configured, pre-sugared set of frameworks/technologies to reduce boilerplate configuration providing you the shortest way to have a Spring web application up and running with smallest line of code/configuration out-of-the-box.
Fyrirlestur fyrir Félag tölvunarfræðinga og Verkfræðingafélagið þann 18.05.2022
Nýsköpun er forsenda tækniframfara sem eru forsendur framþróunar. Nýsköpun byrjar yfirleitt smátt og þarf margar ítranir til að virka. Frumkvöðlar sem eru að búa til nýjungar þurfa ekki einungis að glíma við tæknina og takmarkanir hennar, heldur einnig skoðanir og álit samtímamanna sem sjá ekki alltaf tilgang með nýrri tækni. Í þessum fyrirlestri skoðar Ólafur Andri nýsköpun og þær framfarir sem hafa orðið. Einnig skoðar hann hvert tækniframfarir nútímans muni leiða okkur á komandi árum.
Ólafur Andri Ragnarsson er aðjúnkt við Háskólann í Reykjavík og kennir þar námskeið um tækniþróun og hvernig tæknibreytingar hafa áhrif á fyrirtæki. Hann er tölvunarfræðingur (Msc) að mennt frá Oregon University í Bandaríkjanum. Ólafur Andri er frumkvöðull og stofnaði, ásamt fleirum, Margmiðlun og síðar Betware. Þá tók Ólafur Andri þátt í að stofna leikjafyrirtækið Raw Fury AB í Stokkhólmi.
Fyrirlestur haldinn fyrir tæknifaghóp Stjórnvísi þann 13. október 2020.
Undanfarna áratugi höfum við séð gríðalegar framfarir í tækni og nýsköpun á heimsvísu. Þessar framfarir hafa skapað mannkyninu öllu aukna hagsæld. Þrátt fyrir veirufaraldur á heimsvísu eru framfarir ekkert að minnka heldur munu bara aukast næstu árum. Gervgreind, róbotar, sýndarveruleiki, hlutanetið og margt fleira er að búa til nýjar lausnir og ný tækifæri. Framtíðin er í senn sveipuð dulúð og getur verið spennandi og ógnvekjandi í senn. Eina sem við vitum fyrir vissu er að framtíðin verður alltaf betri. Í þessu fyrirlestri ætlar Ólafur Andri Ragnarsson kennari við HR að fjalla um nýjustu tækni og framtíðina.
Technology is one of the factors of change. When new disruptive technology is introduced, it can change industries. We have many examples of that and will start this journey it one of the most important innovation that has come in our lifetimes, the smartphone. We will explore the impact of the smartphone and the fate of existing companies at the time when iPhone, the first smartphone as we know them, was introduced to the world.
We will also look at other examples from history. Then we look at the broader picture, past industrial revolutions and the one that we are experiencing now, the fourth industrial revolution. Specifically we look briefly at the technologies that fuel this revolution, for example artificial intelligence, robotics, drones, internet of things and more.
This document summarizes a lecture on robotics and drones. It discusses the history of robots dating back to ancient times. It also covers modern industrial robots, robotic developments in the 21st century including robots that can see, hear and sense. The document outlines Isaac Asimov's three laws of robotics. It discusses self-driving cars and their levels of automation. Finally, it covers unmanned aerial vehicles including military drones and delivery drones, and concludes that the robot revolution has only just begun.
The normal interaction with computers is with keyboard and a mouse. For display a rectangular somewhat small screen is used with 2D windowing systems. The mouse was invented more the 40 years ago and has been for 20 years dominant input. Now we are seeing new types of input devices. Multi-touch adds new dimensions and new applications. Natural user interfaces or gesture interfaces where people point to drag objects. Computers are also beginning to recognize facial expressions of people, so it knows if you are smiling. Voice and natural language understanding is getting to a usable stage. All this calls all types of new applications.
Displays are getting bigger. What if any surface was a screen? If you could spray the wall with screen? Or have you phone project images to the wall.
This lectures explores some of these new types of interactions with computers and software. It makes the old mouse look old.
Local is the Lo in SoLoMo, the buzz word. Local is not only about location, it's also about your digital track record. Over 70% of Netflix users watch the films recommend. Mining data to understand people's behaviour is getting to be a huge and valuable business. Advertisers see opportunities in getting direct to their target groups. Predictive intelligence is also about where you will be at some time in the future, and where somebody you know will be.
It turns out that Facebook and Google know you better than you think you know yourself. The world is about to get really scary.
Over two billion people signed up for Facebook. This site the most used site for people when using the Internet. People are not watching TV so much anymore - they using Facebook, Youtube and Netflix and number of popular web sites.
Some people denote their time working for others online. What drives people to write an article on Wikipedia? They don´t get paid. Companies are enlisting people to help with innovations and sites such as Galaxy Zoo ask people to help identifying images. And why do people have to film themselves singing when they cannot sing and post the video on Youtube?
In this lecture we talk about how people are using the web to interact in new ways, and doing stuff.
With the computer revolution vast amount of digital data has become available. With the Internet and smart connected product, the data is growing exponentially. It is estimated that every year, more data is generated than all history prior. And this has repeated over several years.
With all this data, it becomes a platform for something new of its own. In this lecture, we look at what big data is and look at several examples of how to use data. There are many well-know algorithms to analyse data, like clustering and machine learning.
After the computing industry got started, a new problem quickly emerged. How do you operate this machines and how to you program them. The development of operating systems was relatively slow compared to the advances in hardware. First system were primitive but slowly got better as demand for computing power increased. The ideas of the Graphical User Interfaces or GUI (Gooey) go back to Doug Engelbarts Demo of the Century. However, this did not have much impact on the computer industry. One company though, Xerox, a photocopy company explored these ideas with Palo Alto Park. Steve Jobs of Apple and Bill Gates of Microsoft took notice and Apple introduced first Apple Lisa and the Macintosh.
In this lecture on we look so lessons for the development of software, and see how our business theories apply.
In this lecture on we look so lessons for the development of algorithms or software, and see how our business theories apply.
In the second part we look at where software is going, namely Artificial Intelligence. Resent developments in AI are causing an AI boom and new AI application are coming all the time. We look at machine learning and deep learning to get an understanding of the current trends.
We are currently living in times of great transformation. We have over the last couple of decade seen the Internet become the most powerful disrupting force in the world, connecting everyone and transforming businesses. Now everyday objects - things we use are getting smart with sensors and software. And they are connecting. What does this mean?
We will see the world become alive. Cars will talk to road sensors that talk to systems that guide traffic. Plants will talk to weather systems that talk to scientists that research climate change. Farming fields will talk to the farming system that talks to robots that do fertilising and harvesting. Home appliances like refrigerators, ovens, coffee machines and microwaves ovens will talk to the home food and cooking system that will inform the store that you are running out butter, cheese, laundry detergent and coffee beans, which will inform the robot driver to get this to your house after consulting your calendar upon when someone is at home.
In this lecture we explore the Internet of Things, IoT.
The Internet grew out of US efforts to build the ARPANET, a network of peer computers built during the cold war. The two major players were military and academia. The network was simple and required no efforts for security or social responsibility. The early Internet community was mainly highly educated and respectable scientist. In the early 1990s the World Wide Web, a hypertext system is introduced, and soon browsers start to appear, leading the commercialization of Net. New businesses emerge and a technology boom known as the dot-com era.
The network, now over 40, is being stretched. Problems such as spam, viruses, antisocial behaviour, and demands for more content are prompting reinvention of the Net and threatening its neutrality. Add to this government efforts to regulate and limit the network.
In this lecture we look at the Internet and the impact of the network. We will also look at the future of the Internet.
The Internet grew out of US efforts to build the ARPANET, a network of peer computers built during the cold war. The two major players were military and academia. The network was simple and required no efforts for security or social responsibility. The early Internet community was mainly highly educated and respectable scientist. In the early 1990s the World Wide Web, a hypertext system is introduced, and soon browsers start to appear, leading the commercialisation of Net. New businesses emerge and a technology boom known as the dot-com era.
The network, now over 40, is being stretched. Problems such as spam, viruses, antisocial behaviour, and demands for more content are prompting reinvention of the Net and threatening its neutrality. Add to this government efforts to regulate and limit the network.
In this lecture we look at the Internet and the impact of the network. We will also look at the future of the Internet.
- Mobile phones are now the most common device in the world, with over 8.5 billion connections globally as of 2017.
- The development of mobile phones was enabled by earlier innovations in electromagnetism and radio in the late 19th century, but mobile phones did not become practical until the 1980s with the invention of the microchip.
- Mobile technology has advanced through generations from analog 1G networks in the 1980s, to digital 2G networks in the 1990s incorporating texting, and 3G packet switched networks in the 2000s enabling more data and applications.
Did you know that the term "Computer" once meant a profession? And what did people or computers actually do? They computed mathematical problems. Some problems were tedious and error prone. And it is not surprising that people started to develop machines to aid in the effort. The first mechanical computers were actually created to get rid of errors in human computation. Then came tabulating machines and cash registers. It was not until telephone companies were well established that computing machines became practical.
First computers were huge mainframes, but soon minicomputers like DEC’s PDP started to appear. The transistor was introduced in 1947, but its usefulness was not truly realized until in 1958 when the integrated circuit was invented. This led to the invention of the microprocessor. Intel, in 1971, marketed the 4004 – and the personal computer revolution started. One of the first Personal Computers was MITS’ Altair. This was a simple device and soon others saw the opportunities.
In this lecture we start our coverage of computing and look at some of the early machines and the impact they had.
Software is changing the way traditional business operate. People now have smartphones in their pockets - a supercomputer that is 25,000 times more powerful and the minicomputers of the 1960s. This is changing people's behaviour and how people shop and use services. The organisational structure created in the 20th century cannot survive when new digital solution are being offered. Software is changing the way traditional business operate. People now have smartphones in their pockets - a supercomputer that is 25,000 times more powerful and the minicomputers of the 1960s. This is changing people's behaviour and how people shop and use services. The organisational structure created in the 20th century cannot survive when new digital solution are being offered. The hierarchical structure of these established companies assumes high coordination cost due to human activity. But when the coordination cost drops
The organisational structure that companies in the 20th century established was based on the fact that employees needed to do all the work. The coordination cost was high due to the effort and cost of employees, housing etc. Now we have software that can do this for use and the coordination cost drops to close-to-zero. Another thing is that things become free. Consider Flickr. Anybody can sign up and use the service for free. Only a fraction of the users get pro account and pay. How can Flickr make money on that? It turns out that services like this can.
Many businesses make money by giving things away. How can that possibly work? The music business has suffered severely with digital distribution of content. Should musicians put all their songs on YouTube? What is the future business model for music?
One of the great irony of successful companies is how easily they can fail. New companies are founded to take advantage of some new technology. They become highly successful and but when the technology shifts, something new comes along, they are unable to adapt and fail. This is the innovator’s dilemma.
Then there are companies that manage to survive. For example, Kodak survived two platform shift, only til fail the third. IBM has survived over 100 years. What do successful companies do differently?
History has many examples of great innovators who had difficult time convincing their contemporaries of new technology. Even incumbent and powerful companies regarded new technologies as inferior and dismissed it as "toys". Then when disruptive technologies take off they often are overhyped and can cause bubbles like the Internet bubble of the late 1990s.
In this lecture we look at some examples of disruptive technologies and the impact they had. We look at the The Disruptive Innovation Theory by Harvard Professor Clayton Christensen.
Technology evolves in big waves that we call revolutions. The first revolution was the Industrial revolution that started in Britain in 1771. Since than we have see more revolutions come and how we are in the fifth. These revolutions follow a similar path. First there is an installation period where the new technologies are installed and deployed, creating wealth to those who were are the right place at the right time. This is followed by a frenzy, where financial markets wants to be apart. The there is crash and turning point, followed by synergy, a golden age.
In 1908, a new technological revolution started. It was the Age of Oil and Automobile. The technology trigger was Henry Ford´s new assembly line technique that allowed the manufacturing of standardized, low cost automobile. This created the car industry and other manufacturing companies. This also created demand for gas thus creating the oil industry. During the Roaring Twenties the stock prices rose to new levels, until a crash and the Great Depression. Only after World War II, came a turnaround point followed by a golden age in the post-war boom.
In this lecture we look at a framework for understanding technological revolutions. There revolutions completely change societies and replace the old with new technologies. We will explore how these revolutions take place. We should now be in the golden age phase.
We also look at generations.
In the early days of product development, the technology is inferior and lacking in performance. The focus is very much on the technology itself. The users are enthusiast who like the idea of the product, find use for it, and except the lack of performance. Then as the product becomes more mature, other factors become important, such as price, design, features, portability. The product moves from being a technology to become a consumer item, and even a community.
In this lecture we explore the change from technology focus to consumer focus, and look at why people stand in line overnight to buy the latest gadgets.
This document summarizes a lecture about the diffusion of innovation. It discusses how new ideas are developed through collaboration and exchange. It also discusses how innovations diffuse slowly at first, gaining momentum over time as they are adopted by pragmatists and conservatives seeking convenient solutions. The rate of adoption follows an S-curve, with innovators and enthusiasts driving early adoption and the mass market adopting later. Customers' motivations for adoption change over time, initially valuing the innovation's benefits and later valuing its functionality. Factors like network effects, convenience, and compatibility influence adoption rates.
Cosa hanno in comune un mattoncino Lego e la backdoor XZ?Speck&Tech
ABSTRACT: A prima vista, un mattoncino Lego e la backdoor XZ potrebbero avere in comune il fatto di essere entrambi blocchi di costruzione, o dipendenze di progetti creativi e software. La realtà è che un mattoncino Lego e il caso della backdoor XZ hanno molto di più di tutto ciò in comune.
Partecipate alla presentazione per immergervi in una storia di interoperabilità, standard e formati aperti, per poi discutere del ruolo importante che i contributori hanno in una comunità open source sostenibile.
BIO: Sostenitrice del software libero e dei formati standard e aperti. È stata un membro attivo dei progetti Fedora e openSUSE e ha co-fondato l'Associazione LibreItalia dove è stata coinvolta in diversi eventi, migrazioni e formazione relativi a LibreOffice. In precedenza ha lavorato a migrazioni e corsi di formazione su LibreOffice per diverse amministrazioni pubbliche e privati. Da gennaio 2020 lavora in SUSE come Software Release Engineer per Uyuni e SUSE Manager e quando non segue la sua passione per i computer e per Geeko coltiva la sua curiosità per l'astronomia (da cui deriva il suo nickname deneb_alpha).
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
How to Get CNIC Information System with Paksim Ga.pptxdanishmna97
Pakdata Cf is a groundbreaking system designed to streamline and facilitate access to CNIC information. This innovative platform leverages advanced technology to provide users with efficient and secure access to their CNIC details.
Enchancing adoption of Open Source Libraries. A case study on Albumentations.AIVladimir Iglovikov, Ph.D.
Presented by Vladimir Iglovikov:
- https://www.linkedin.com/in/iglovikov/
- https://x.com/viglovikov
- https://www.instagram.com/ternaus/
This presentation delves into the journey of Albumentations.ai, a highly successful open-source library for data augmentation.
Created out of a necessity for superior performance in Kaggle competitions, Albumentations has grown to become a widely used tool among data scientists and machine learning practitioners.
This case study covers various aspects, including:
People: The contributors and community that have supported Albumentations.
Metrics: The success indicators such as downloads, daily active users, GitHub stars, and financial contributions.
Challenges: The hurdles in monetizing open-source projects and measuring user engagement.
Development Practices: Best practices for creating, maintaining, and scaling open-source libraries, including code hygiene, CI/CD, and fast iteration.
Community Building: Strategies for making adoption easy, iterating quickly, and fostering a vibrant, engaged community.
Marketing: Both online and offline marketing tactics, focusing on real, impactful interactions and collaborations.
Mental Health: Maintaining balance and not feeling pressured by user demands.
Key insights include the importance of automation, making the adoption process seamless, and leveraging offline interactions for marketing. The presentation also emphasizes the need for continuous small improvements and building a friendly, inclusive community that contributes to the project's growth.
Vladimir Iglovikov brings his extensive experience as a Kaggle Grandmaster, ex-Staff ML Engineer at Lyft, sharing valuable lessons and practical advice for anyone looking to enhance the adoption of their open-source projects.
Explore more about Albumentations and join the community at:
GitHub: https://github.com/albumentations-team/albumentations
Website: https://albumentations.ai/
LinkedIn: https://www.linkedin.com/company/100504475
Twitter: https://x.com/albumentations
Sudheer Mechineni, Head of Application Frameworks, Standard Chartered Bank
Discover how Standard Chartered Bank harnessed the power of Neo4j to transform complex data access challenges into a dynamic, scalable graph database solution. This keynote will cover their journey from initial adoption to deploying a fully automated, enterprise-grade causal cluster, highlighting key strategies for modelling organisational changes and ensuring robust disaster recovery. Learn how these innovations have not only enhanced Standard Chartered Bank’s data infrastructure but also positioned them as pioneers in the banking sector’s adoption of graph technology.
Full-RAG: A modern architecture for hyper-personalizationZilliz
Mike Del Balso, CEO & Co-Founder at Tecton, presents "Full RAG," a novel approach to AI recommendation systems, aiming to push beyond the limitations of traditional models through a deep integration of contextual insights and real-time data, leveraging the Retrieval-Augmented Generation architecture. This talk will outline Full RAG's potential to significantly enhance personalization, address engineering challenges such as data management and model training, and introduce data enrichment with reranking as a key solution. Attendees will gain crucial insights into the importance of hyperpersonalization in AI, the capabilities of Full RAG for advanced personalization, and strategies for managing complex data integrations for deploying cutting-edge AI solutions.
TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Climate Impact of Software Testing at Nordic Testing DaysKari Kakkonen
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
Building RAG with self-deployed Milvus vector database and Snowpark Container...Zilliz
This talk will give hands-on advice on building RAG applications with an open-source Milvus database deployed as a docker container. We will also introduce the integration of Milvus with Snowpark Container Services.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
2. Agenda
Why frameworks?
Framework patterns
– Inversion of Control and Dependency Injection
– Template Method
– Strategy
From problems to patterns
– Game Framework
Spring framework
– Bean containers
– BeanFactory and ApplicationContext
3. Reading
Dependency Injection
Template Method Pattern
Strategy Pattern
Spring Framework (video)
Article by Fowler
– Inversion of Control Containers and the Dependency
Injection pattern
4. Resources
Spring Framework homepage
– http://www.springframework.org
Reference Documentation
– http://www.springframework.org/docs/reference/index.
html
– Also in PDF format
6. Why use Frameworks?
Frameworks can increase productivity
– We can create our own framework
– We can use some third party framework
Frameworks implement general functionality
– We use the framework to implement our business
logic
7. Framework design
Inheritance of framework classes
Composition of framework classes
Implementation of framework interfaces
Dependency Injection
Framework
Your Code
Domain ?
8. Using Frameworks
Frameworks are concrete, not abstract
– Design patterns are conceptual, frameworks provide
building blocks
Frameworks are higher-level
– Built on design patterns
Frameworks are usually general or technology-
specific
Good frameworks are simple to use, yet
powerful
9. Abstractions
From API to Frameworks
API Definition JEE/.NET API
API Patterns JEE/.NET
Patterns
Framework Spring
10. Open Source Frameworks
Web Frameworks
– Jakarta Struts, WebWork, Maverick, Play!
Database Frameworks
– Hibernate, JDO, TopLink
General Framework
– Spring, Expresso, PicoContainer, Avalon
Platform Frameworks
– JEE
11. Where do Frameworks Come
From?
Who spends their time writing frameworks?
If they give them away, how can anyone make
money?
Companies that use frameworks, have their
developers work on them
Give the code, sell the training and consulting
12. Write down the pros and cons (benefits and drawbacks) for frameworks.
Use two columns, benefits on the left, drawbacks right
EXERCISE
13. Pros and Cons
Pros
– Productivity
– Well know application
models and patterns
– Tested functionality
– Connection of different
components
– Use of open standards
Cons
– Can be complicated,
learning curve
– Dependant on frameworks,
difficult to change
– Difficult to debug and find
bugs
– Performance problems can
be difficult
– Can be bought by an evil
company
15. Separation of Concerns
One of the main challenge of frameworks is to
provide separation of concerns
– Frameworks deal with generic functionality
– Layers of code
Frameworks need patterns to combine generic and
domain specific functionality
16. Framework Patterns
Useful patterns when building a framework:
– Dependency Injection: remove dependencies by
injecting them (sometimes called Inversion of Control)
– Template Method: extend a generic class and provide
specific functionality
– Strategy: Implement an interface to provide specific
functionality
17. Dependency Injection
Removes explicit dependence on specific
application code by injecting depending classes
into the framework
Objects and interfaces are injected into the
classes that to the work
Two types of injection
– Setter injection: using set methods
– Constructor injection: using constructors
18. Dependency Injection
Fowler’s Naive Example
– MovieLister uses a finder class
– How can we separate the finder functionality?
class MovieLister...
public Movie[] moviesDirectedBy(String arg) {
List allMovies = finder.findAll();
for (Iterator it = allMovies.iterator(); it.hasNext();) {
Movie movie = (Movie) it.next();
if (!movie.getDirector().equals(arg)) it.remove();
}
return (Movie[])allMovies.toArray(new Movie[allMovies.size()]);
}
Separate what varies
REMEMBER PROGRAM TO INTERFACES PRINSIPLE?
19. Dependency Injection
Fowler’s Naive Example
– Let’s make an interface, MovieFinder
– MovieLister is still dependent on particular
MovieFinder implementation
public interface MovieFinder {
List findAll();
}
class MovieLister...
private MovieFinder finder;
public MovieLister() {
finder = new MovieFinderImpl("movies1.txt");
}
Argh!
Not cool.
20. Dependency Injection
An assembler (or container) is used to create an
implementation
– Using constructor injection, the assember will create a
MovieLister and passing a MovieFinder interface in the
contructor
– Using setter injection, the assembler will create
MovieLister and then all the setFinder setter
method to provide the
MovieFinder interface
21. Dependency Injection
Example setter injection
class MovieLister...
private MovieFinder finder;
public void setFinder(MovieFinder finder) {
this.finder = finder;
}
class MovieFinderImpl...
public void setFilename(String filename)
this.filename = filename;
}
28. Template Method Pattern
Create a template for steps of an algorithm and let
subclasses extend to provide specific
functionality
We know the steps in an algorithm and the order
– We don’t know specific functionality
How it works
– Create an abstract superclass that can be extended
for the specific functionality
– Superclass will call the abstract methods when
needed
30. Template Method Pattern
public class AbstractOrderEJB
{
public final Invoice placeOrder(int customerId,
InvoiceItem[] items)
throws NoSuchCustomerException, SpendingLimitViolation
{
int total = 0;
for (int i=0; i < items.length; i++)
{
total += getItemPrice(items[i]) * items[i].getQuantity();
}
if (total >getSpendingLimit(customerId))
{
...
}
else if (total > DISCOUNT_THRESHOLD) ...
int invoiceId = placeOrder(customerId, total, items);
...
}
}
32. Template Method Pattern
public class MyOrderEJB extends AbstractOrderEJB
{
...
int getItemPrice(int[] i)
{
...
}
int getSpendingLimit(int customerId)
{
...
}
int placeOrder(int customerId, int total, int items)
{
...
}
}
33. Template Method Pattern
When to Use it
– For processes where steps are know but some steps
need to be changed
– Works if same team is doing the abstract and the
concrete class
When Not to Use it
– The concrete class is forced to inherit, limits
possibilities
– Developer of the concrete class must understand the
abstract calls
– If another team is doing the concrete class as this
34. Strategy Pattern
Create a template for the steps of an algorithm
and inject the specific functionality
Implement an interface to provide specific
functionality
– Algorithms can be selected on-the-fly at runtime
depending on conditions
– Similar as Template Method but uses interface
inheritance
35. Strategy Pattern
How it works
– Create an interface to use in the generic algorithm
– Implementation of the interface provides the specific
functionality
– Framework class has reference to the interface an
– Setter method for the interface
37. Strategy Pattern
Interface for specific functionality
Generic class uses the interface
– Set method to inject the interface
public interface DataHelper
{
int getItemPrice(InvoiceItem item);
int getSpendingLimit(CustomerId) throws NoSuchCustomerException;
int palceOrder(int customerId, int total, InvoiceItem[] items);
}
private DataHelper dataHelper;
public void setDataHelper(DataHelper newDataHelper)
{
this.dataHelper = newDataHelper;
}
DEPENDENCY INJECTION
38. Strategy Pattern
public class OrderEJB
{
public final Invoice placeOrder(int customerId, InvoiceItem[] items)
throws NoSuchCustomerException, SpendingLimitViolation
{
int total = 0;
for (int i=0; i < items.length; i++)
{
total += this.dataHelper.getItemPrice(items[i]) *
items[i].getQuantity();
}
if (total >this.dataHelper.getSpendingLimit(customerId))
{...
}
else if (total > DISCOUNT_THRESHOLD) ...
int invoiceId = this.dataHelper.placeOrder(customerId,
total, items);
...
}
}
39. We are building framework for games. It turns out that all the games
are similar so we create an abstract class for basic functionality that
does not change, and then extend that class for each game. What
pattern is this?
A) Layered Supertype
B) Template Method
C) Strategy
D) Dependency Injection
QUIZ
✔
41. Framework design
Inheritance of framework classes
Template Method – class Inheritance
Composition of framework classes
Strategy – interface Inheritance
Dependency Injection
Framework
Your Code
Domain ?
42. From Problem to Pattern
We need to design game software
Common turn-based board games like monopoly,
chess, backgammon, yatzy etc.
You must propose a design
43. From Problem to Pattern
Let’s make a Game Framework
What patterns can we use?
44. Patterns
Template Method
– Template of an algorithm
– Based on class inheritance
Strategy
– Composition of an strategy
– Based on interface inheritance
45. Template Method Pattern
Create a template for steps of an algorithm and let
subclasses extend to provide specific
functionality
We know the steps in an algorithm and the order
– We don’t know specific functionality
How it works
– Create an abstract superclass that can be extended
for the specific functionality
– Superclass will call the abstract methods when
needed
46. What is the game algorithm?
initialize
while more plays
make one turn
print winnner
void initializeGame();
boolean endOfGame();
void makePlay(int player);
void printWinner();
49. Interface for game algorithm
package is.ru.honn.game.framework;
public interface Game
{
public void initializeGame();
public void makePlay(int player);
public boolean endOfGame();
public void printWinner();
}
50. The Template
package is.ru.honn.game.framework;
public abstract class AbstractGame implements Game
{
protected int playersCount;
public final void playOneGame(int playersCount)
{
this.playersCount = playersCount;
initializeGame();
int j = 0;
while (!endOfGame()) {
makePlay(j);
j = (j + 1) % playersCount;
}
printWinner();
}
}
51. The Specific Game
class Chess extends AbstractGame
{
public void initializeGame()
{
// Initialize players, put the pieces on the board
}
public void makePlay(int player)
{
// Process a turn for the player
}
public boolean endOfGame()
{
// Return true if in Checkmate or stalemate
return true;
}
public void printWinner()
{
// Display the winning player
}
}
54. Strategy Pattern
Create a template for the steps of an algorithm
and inject the specific functionality (strategy)
Implement an interface to provide specific
functionality
– Algorithms can be selected on-the-fly at runtime
depending on conditions
– Similar as Template Method but uses interface
inheritance
59. The Specific Strategy
class ChessStrategy implements GameStrategy
{
public void initializeGame()
{
// Initialize players, put the pieces on the board
}
public void makePlay(int player)
{
// Process a turn for the player
}
public boolean endOfGame()
{
// Return true if in Checkmate or stalemate
return true;
}
public void printWinner()
{
// Display the winning player
}
}
60. The Context
public class GamePlay
{
GameStrategy strategy;
protected int playersCount;
public void setStrategy(GameStrategy strategy)
{
this.strategy = strategy;
}
public final void playOneGame(int playersCount)
{
this.playersCount = playersCount;
this.strategy.initializeGame();
int j = 0;
while (!this.strategy.endOfGame()) {
this.strategy.makePlay(j);
j = (j + 1) % playersCount;
}
this.strategy.printWinner();
}
}
Polymorphism
61. The Assembler
GamePlay play = new GamePlay();
// Assign the right strategy
play.setStrategy(new ChessStrategy());
What design pattern is used
when the strategy is assigned
to the context?
62. Dependency Injection
Removes explicit dependence on specific
application code by injecting depending classes
into the framework
Objects and interfaces are injected into the
classes that to the work
Two types of injection
– Setter injection: using set methods
– Constructor injection: using constructors
65. Lightweight Containers
Assemble components from different projects
into a cohesive application
– Wiring is done with “Inversion of Control”
– Provide life-cycle management of objects
– Provide context
68. Spring Containers
Lightweight containers
– Provides life-cycle management and other services
BeanFactory
– Simple factory interface for creating beans
ApplicationContext
– Extends BeanFactory and adds some functionality for
application context
Packages
– org.springframework.beans
– org.springframework.context
– Refer to Spring 3
70. Using BeanFactory
BeanFactory
<beans>
<bean id="person" class="Person">
<property name="name">
<value>Olafur Andri</value>
</property>
<property name="email">
<value>andri@ru.is</value>
</property>
</bean>
</beans>
read, parse
create
Person
The Bean Factory uses
setter injection to create the
person object
71. FileSystemXmlApplicationContext
Loads the context from an XML file
Application contexts are intended as central
registries
– Support of hierarchical contexts (nested)
public class AppTest
{
public static void main(String[] args)
{
ApplicationContext ctx =
new FileSystemXmlApplicationContext("app.xml");
}
}
72. Summary
Framework patterns
– Inversion of Control and Dependency Injection
– Template Method
– Strategy
From problems to patterns
– Game Framework
Spring framework
– Bean containers
– BeanFactory and ApplicationContext