Advanced web application architecture - Talk

Reactive programming in javascript. What is reactive programming, what is a stream, difference between array, object, promise and observable.

This document provides an introduction to reactive programming and RxJS. It begins by explaining the benefits of the reactive approach for asynchronous and event-driven code. It then contrasts reactive and functional programming, noting that reactive programming deals with asynchronous data streams. The document introduces RxJS and how it handles promises and observables. It defines observables and operators. Examples are provided to demonstrate reactive concepts. Resources for further learning are included at the end.

This document discusses reactive programming and introduces the Reactive Extensions (Rx) library. It provides an overview of Rx and how it addresses limitations of traditional .NET events by treating all data sources as observable sequences. Rx allows composing and transforming event streams in a declarative way using LINQ-like operators. The document demonstrates how to work with observable sequences and observers in Rx and contrasts it with other approaches like the Task Parallel Library.

The document discusses Ajax, which uses a combination of technologies like XHTML, CSS, JavaScript, and XMLHttpRequest to retrieve data asynchronously from web servers without reloading the entire webpage. It allows web applications to be more interactive and responsive by exchanging small amounts of data with the server behind the scenes. While not new, Ajax became popular when Google used it to great effect in Gmail, showing how it could enhance the usability of web applications and create richer internet experiences without the need for plugins like Flash.

A talk on how to think about choosing a distributed messaging technology, and some notes on how to avoid locking yourself into a single choice, keeping your platform able to grow as needs change.

Speaker: Nhan Nguyen - Software Architect @ FPT IS Bio: Author of HtmlJs Be fluent in C# and JavaScript. Software architect at FPT IS Description: Kiến trúc của HtmlJs Cách thiết kế web app với HtmlJs Demo (code 1 số app đơn giản + performance demo) Mô hình lập trình three-way binding (điểm mới so với buổi trước)

Functional reactive programming combines functional programming and reactive programming. Functional programming avoids mutable state and side effects through referential transparency and reusable functions. Reactive programming builds reactive systems through asynchronous data streams and treating everything as a stream. Observables are the core component, representing a stream of data over time, and operators allow querying, transforming, and combining observables. RxJS is a popular library for implementing functional reactive programming.

This document outlines principles for writing maintainable code using a service-oriented architecture approach. It recommends defining reusable service objects that each focus on a single domain concept or business logic. These service objects should make their dependencies explicit through their constructor signatures. This makes the code more modular and testable. It also lays the foundation for potentially extracting services into microservices later. The document provides these recommendations and emphasizes that keeping code separated by concern and with well-defined dependencies leads to more maintainable code over time. It concludes by promising code examples demonstrating these principles.

This document provides an overview of Prometheus, an open source monitoring tool. It discusses key Prometheus concepts like push vs pull monitoring, blackbox vs whitebox monitoring, its architecture with a Prometheus server and alertmanager, service discovery, metric types, labels, the data model using time series, PromQL for querying metrics, and alerting rules. The document is intended to explain the fundamentals of Prometheus for monitoring applications and services.

The document discusses building modern web applications with React and Flux. It begins with introductions and an agenda. It then covers React components, lifecycle methods, and Flux architecture including actions, dispatcher and stores. It discusses common mistakes, other view libraries like Vue and Riot, and takes questions.

A talk about why not to build Microservices right off the bat, and some of the problems you have when jumping into them too early.

Ruby on Rails is a web application framework built on Ruby. It was created by David Hansson in 2004 and follows conventions like MVC architecture and RESTful design. Rails makes it easier for developers to build database-backed web applications by providing default structures for common tasks and promoting practices like DRY (Don't Repeat Yourself) and agile development. The framework includes everything needed to build a full-stack web app with models, views, controllers, mailers and support for databases through ActiveRecord.

.NET Core 3.0 includes performance improvements, enhancements to SignalR, new endpoint routing for web apps, the introduction of Blazor and Razor Components, an in-box JSON reader, support for async streams, new C# 8.0 features, improvements to Entity Framework 3.0, support for HTTP/2, and the ability to publish self-contained executables. The presentation provides an overview of the key new features in .NET Core 3.0 across areas like performance, web development, client-side frameworks, languages, and tools.

Test Driven Development (TDD) involves writing tests before code to drive the development process. It emphasizes: 1. Starting with writing an acceptance test for the thinnest slice of functionality, known as a "walking skeleton". 2. Writing unit tests by following the "write tests backwards" approach of specifying the test name, call to code, and expectations before writing code to pass the test. 3. Using mock objects to guide interface design by specifying the required services of an object rather than its provided features, promoting narrow, role-based interfaces between objects.

This document provides an overview of Gatling, an open-source load testing tool developed using Scala. It discusses Gatling's focus on web applications, simplicity, high performance, good reports, and easy integration with CI tools. It then covers setting up Gatling, including prerequisites, writing a sample test, and key concepts like scenarios, simulations, and reports.

This document outlines 10 commandments for writing efficient and well-structured Apex code in Salesforce. The commandments advise practices like limiting queries and DML operations in loops, having a single trigger per object, utilizing relationships and maps to reduce queries, writing unit tests with 100% code coverage that test all logic branches, limiting future calls and using asynchronous code where possible, and writing batch Apex that is efficiently optimized. The document provides examples and explanations for each commandment and invites questions from the reader.

The document discusses refactoring legacy code for a social networking website for travelers. It describes business requirements where users must be logged in to see content and be friends to see others' trips. When refactoring production code, tests must be added first and refactoring should start from the deepest code branches and move outward. Tests should also be added from the shortest code branches outward. Tips are provided on writing clean, readable code and tests in small, safe increments with frequent commits while embracing changes.

For 15 years in development, I managed to take part in the creation of a large number of various projects. I have already made a number of talks on the working architecture of Web applications, but this is only part of the efficient development puzzle. We will consider the whole process from the start of the project to its launch in production. I’ll tell you how we approach the ideas of the “12 Factor App”, how we use the docker, discuss environment deployment issues, security issues, testing issues, discuss the nuances of SDLC and much more.

Struts is an open-source MVC framework that makes it easier to develop Java web applications by providing common functionality out of the box. While the Model 2 pattern provides a basic structure, frameworks like Struts standardize development and provide features like validation, tag libraries, and simplified configuration. For large applications, frameworks save development time compared to manually implementing common functionality in each application. Struts uses the Model 2 pattern with interceptors, actions, and results to simplify request processing and forwarding.

The document discusses the working architecture of NodeJs applications. It begins by introducing the speaker Viktor Turskyi and his experience. It then discusses why architecture is important and shares their battle-tested approach. The presentation addresses whether to use monolith or microservices architectures, and recommends starting with a monolith in most cases. It also discusses domain models, services, and controllers. The presentation provides an example of a service class and user registration process to demonstrate the architecture in practice.

We launched more than 60 projects, developed a web application architecture that is suitable for projects of completely different sizes. In the talk, I'll analyze this architecture, will consider the question what to choose “monolith or microservices”, will show the main architectural mistakes that developers make.

The document discusses various software architecture patterns and principles, comparing monolithic and microservices architectures. It covers topics like layers, domain-driven design, code-first versus database-first approaches, and considerations for data management in multi-tenant systems. The key aspects of architectures like microservices and domain-driven design are explained at a high level.

A quick presentation about ReactJS and its benefits - with some discussion of the Flux pattern/architecture at the end. Follow me: https://twitter.com/marcacyr https://github.com/marcacyr

This document provides an overview and summary of OpenShift v3 and containers. It discusses how OpenShift v3 uses Docker containers and Kubernetes for orchestration instead of the previous "Gears" system. It also summarizes the key architectural changes in OpenShift v3, including using immutable Docker images, separating development and operations, and abstracting operational complexity.

This document provides an overview of DevOps concepts and practices for delivering changes for applications and databases. It discusses topics like continuous integration, continuous delivery, infrastructure as code, database automation, and managing changes. The document is presented as a training material divided into multiple chapters that cover application development, infrastructure, databases, managing changes, and establishing a DevOps engineering practice. It emphasizes the importance of collaboration and communication between development and operations teams to enable continuous software delivery.

First Session on Learning to Code for Startup MVP's using Ruby on Rails. This session covers the web architecture, Git/GitHub and makes a real rails app that is deployed to Heroku at the end. Thanks, Henry

This document summarizes new features in .NET Framework 4.5, including improvements to WeakReferences, streams, ReadOnlyDictionary, compression, and large objects. It describes enhancements to server GC, asynchronous programming, the Task Parallel Library, ASP.NET, Entity Framework, WCF, WPF, and more. The .NET 4.5 update focuses on performance improvements, support for asynchronous code and parallel operations, and enabling modern app development patterns.

This document provides information about a Global Office 365 Bootcamp 2018 event being held in Iselin, New Jersey. It introduces the organizers Tom Daly, Paul Galvin, and Adnan Rafique. It then provides an overview of topics that will be covered, including setting up an Office 365 tenant and development environment, an introduction to SharePoint client-side web parts and extensions, building "Hello World" examples, connecting to SharePoint APIs, an introduction to React, and other important React concepts like components, props, state, and lifecycle methods. Links are provided to Microsoft documentation for many of the code examples and tutorials that will be shown.

The document discusses LinkedIn's adoption of the Dust templating language in 2011. Some key points: - LinkedIn needed a unified view layer as different teams were using different templating technologies like JSP, GSP, ERB. - They evaluated 26 templating options and selected Dust as it best met their criteria like performance, i18n support, and being logic-less. - Dust templates are compiled to JavaScript for client-side rendering and to Java for server-side rendering (SSR) through Google's V8 engine, allowing templates to work on both client and server. - SSR addresses challenges like SEO, supporting clients without JavaScript, and i18n by rendering

How to develop NodeJS apps effectively? I will tell you all details and share his personal experience on the whole process: from the very start and up to the production stage. You will also learn more about Docker, SDLC and 12 Factor App. Save the date!

Hönnunarmunstur eru aðferðir við að leysa algeng vandamál. En notkun þeirra felst í að takast á við verkefni sem þarf að leysa. Fyrst koma verkefnin og svo finnum við hvaða munstur hentar miðað við þær forsendur sem við höfum. Oft þegar verið er að vinna að lausnum þá er alls ekki hægt að gera allan hugbúnaðinn í einu, heldur þarf að "hakka" suma hluti meðan unnið er í öðru. Til þess að lenda ekki í technical dept þarf að vera með stöðugt refactoring. Í þessum fyrirlestri skoðum við vandamál og rifjum upp grunnmunstrin (base patterns) sem við kynntumst í L05 Design Patterns. Þá skoðum við hvernig við leysum tengingu við póstþjón.

This document discusses module architecture for React-Redux applications. It recommends splitting an application into semantically named modules to improve development speed, scalability, and reduced maintenance costs. The modularity level depends on the application scale, with everything identifiable as a separate component separated. Minimal connectivity between modules ensures the architecture remains scalable and readable. Business logic and data models should be extracted and organized by domain. Selectors wire components to the state model in a clear way. Actions are standardized between modules. A modular architecture has pros like scalability and reduced costs, and a potential con of increased number of files/folders.

Servlet Technology is used to create web applications. Servlet technology uses Java language to create web applications. As Servlet Technology uses Java, web applications made using Servlet are Secured, Scalable and Robust. Web applications are helper applications that resides at web server and build dynamic web pages. A dynamic page could be anything like a page that randomly chooses picture to display or even a page that displays the current time.

The description of elements for an iOS backend, in the context of an application talking to a REST backend

The document summarizes a system design workshop for designing a note-taking application called TechyNotes. The workshop covers defining system requirements and interfaces, discussing database and storage options, designing initial and revised system architectures, and addressing scalability bottlenecks. Attendees learn a repeatable process for system design and discuss technologies like databases, load balancing, caching, and queues.

Mail is received as a commodity from the cloud, also Collaboration. However, in many client meetings we often hear the question, where are we heading with the hundreds of Notes applications? Which strategy is most effective and cost efficient at the same time? Is cloud a practical answer? With sound and proven methodology Notes applications can be transformed into valuable web applications in the cloud. It turns out that today the time has come for cloud platforms. A side view of large customer projects, already transforming their Notes applications to the cloud - for example to IBM SoftLayer - is helpful. This Track helps you understand that strategies that are implemented and lets you understand the costs and risks involved.

Struts 2.0 is an open source MVC framework that makes building web applications with Java easier. It uses the Model 2 architecture pattern with actions as controllers, models to handle business logic, and JSPs as views. Struts handles common tasks like request processing, validation, and forwarding so developers can focus on business logic. While simple applications can use just servlets and JSPs, larger ones benefit from Struts' standardized structure, tags, and features which reduce complexity and improve maintenance.

This document summarizes a fireside chat about the Rector tool for refactoring PHP code. It introduces Rector as a PHP command line tool that can understand code, improve entire codebases at once, and be fine-tuned or extended for specific needs. Rector can help with continuous improvement, code coaching, and the future of refactoring PHP applications without creating technical debt from migrations. The chat then transitions to a demo by Tomas and discusses a book about how to use and extend Rector.

Of course, you should read all you can about SOLID, Design patterns, Patterns of Enterprise Application Architecture, etc. Once you have a basic understanding of these topics you still have to write that code though, and write it well too! What is good code? Are there some guidelines, or rules of thumb, which you can follow while making your everyday coding decisions? In this talk I’ll cover many of these coding guidelines, which aren’t usually covered by patterns or principles books. They should help you write better code and give you a richer vocabulary for reviewing other people’s code. Some of the subjects that we’ll discuss are: state, mutability, CQS, one-method objects, domain-first, API-driven, functional programming influences, object boundaries, (de)serialization, and many more!

Of course, you should read all you can about SOLID, Design patterns, Patterns of Enterprise Application Architecture, etc. Once you have a basic understanding of these topics you still have to write that code though, and write it well too! What is good code? Are there some guidelines, or rules of thumb, which you can follow while making your everyday coding decisions? In this talk Matthias will cover many of these coding guidelines, which aren’t usually covered by patterns or principles books. They should help you write better code and give you a richer vocabulary for reviewing other people’s code. Some of the subjects that we’ll discuss are: state, mutability, CQS, one-method objects, domain-first, API-driven, functional programming influences, object boundaries, (de)serialization, and more!

Working effectively with legacy code isn’t all about creating test harnesses before refactoring algorithms. The “safety first” strategy doesn’t always apply. Not if the code you’re looking at is LYING IN YOUR FACE anyway. In this talk I’ll show you what brutal refactoring is. I’ll show you the red glowy eyes of the Churn. And I’ll hold up some big warning signs that should prevent you from producing legacy code today. Table flips allowed.

The document discusses object-oriented design principles and patterns. It covers design patterns like abstract factory, mediator, proxy, builder, and others. It also discusses design principles like SOLID principles, package design principles, and tactical domain-driven design patterns. It emphasizes that while knowing patterns and principles is important, the key is applying them correctly. It provides guidance on writing good object-oriented code by focusing on object cohesion, encapsulation, defensive programming, and using composition over inheritance.

This document discusses advanced application architecture, specifically layers, ports, and adapters. It introduces layered architecture as a way to define coupling and cohesion in a codebase. The layers separate domains into infrastructure, application, and domain layers with dependencies only allowed in one direction from higher to lower layers. Ports define interfaces that layers can depend on while adapters implement ports, allowing for decoupling and replacement of components. The document also discusses testing at the unit, integration, acceptance, and system levels to verify the architecture.

The much hyped "Microservice Architecture" tells us to design our services to be autonomous. Let's find out what this means and how we can achieve it. In this talk I will guide you through the fascinating world of asynchronous communication, event-driven systems and distributed data.

Docker allows for isolation of applications into lightweight containers that can be linked together and share resources. Containers are run from images that act as templates containing the files, configuration, and dependencies for an application. Images are built from Dockerfiles that define the build process and layers, and can be pulled from or pushed to a registry for distribution. Docker uses a client-server model with daemons managing containers on each host.