Posts Tagged: software complexity

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Analysing the Complexity of Angular Apps

Analysing an existing application if you join a project. Assessing the quality and maintainability of an application. Identifying soft spots in an application which could benefit the most from refactoring. There are numerous reasons for wanting to size up the complexity of an application. In addition to general and language-specific tools provided by IDEs and applications such as SonarLint / SonarQube it can be useful to not only take framework specifics into account but to actually make use of them to get a better ... Read more

A Quick Reminder About the Relevance of Latency in Computer Systems

This Gist by Jonas Bonér gives a quick overview of the different latency values for accessing different kinds of data storage and memory systems and the order of magnitude by which they differ: Latency Numbers Every Programmer Should Know Putting this in perspective is particularly important in the context of service-based architectures like RESTful web services, Microservices and similar approaches. All-out service-based architectures might be the right the solution to some scalability and deployment problems in complex software systems but it's vital to keep ... Read more

JHipster: Generate And Bootstrap CRUD Apps With Spring Boot And Angular

The previous two posts in my series on helpful tools for developing CRUD applications were about tools that addressed very specific problem areas: API format specifications and code generation from those specifications in particular. This post will be both less about APIs and solving specific CRUD-related problems but about a tool that deals with CRUD app requirements in a comprehensive manner. This tool I'm talking about is called - not so slightly tongue-in-cheek - JHipster. Both inspired by tried-and-true frameworks like Ruby on ... Read more

Swagger: A Roundtrip Tool For Creating And Consuming REST APIs

In this second part of my series on useful tools for developing CRUD applications I'd like to introduce Swagger and Swagger Codegen in particular. Introduce perhaps isn't exactly the right word because first of all Swagger is quite well known in developer circles these days. Secondly, a few months ago I wrote a blog post about how to use Swagger to generate client SDKs for REST APIs. Swagger - originally having originated at Wordnik is a tool for documenting and publishing their ... Read more

Why Do We Still Write CRUD Applications?

Probably every software developer - since the 1990s at least - has been there once, asking him- or herself: "Why do I have to write tedious, repetitive CRUD code time and time again?" Being good, virtuous programmers some of those developers did what software development in the end mostly is about: They tried to automate a cumbersome, repetitive process that like any repetitive process should be performed by machines rather than humans. Some have succeeded - to some degree at least - ... Read more

Design Patterns: Event Sourcing and Command and Query Responsibility Segregation (CQRS)

Event Sourcing and Command and Query Responsibility Segregation (CQRS) are system design patterns that allow you to deal with event streams in a consistent manner. Common line-of-business applications typically are built using the MVC design pattern with the database tables representing the model tier in MVC as the single source of truth for the application state. Event-based systems are different - and inherently more complex - in that their single source of truth is the stream of events that led to the current ... Read more

Interactive Flowcharts with code2flow

Visualisation often helps immensely when trying to understand complex systems and interactions. Visualising these systems and their behaviour can be a daunting task though: Covering each and every path a workflow or process might take can be quite arduous. In many cases it's not even possible to comprehensively describe a system that has not yet been implemented. Edge cases frequently only tend to surface once a software has been tried out under real conditions. Software in turn needs to adapt quickly, which all ... Read more

JSCity – Code Complexity Visualization For JavaScript Codebases

JSCity is a tool for visualising JavaScript source code complexity that uses the CodeCity metaphor. This approach makes use of the building blocks of modern cities for visualising the building blocks of software. Since in JavaScript functional programming is the predominant programming paradigm JSCity represents code artefacts like this: folders are districts files are sub-districts functions are buildings inner functions are represented as buildings on the top of their nested function / building This for example is the visualisation of the AngularJS source code. JSCity even allows you ... Read more