Serverless Java with AWS Lambda: Introduction

Just as we are over the crest of the microservice hype and can finally see how this architectural tool might (or might not) solve our problems the next hype is already here: serverless programming! In this first blog post I’m going to explain what serverless is, what it isn’t, and how it can change the way we create software. In the next posts I’m going to show a few simple examples using a well known ‘serverless’ platform: AWS Lambda.

Originally posted here.

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Caching HTTP requests in AngularJS

In AngularJS, especially when you’re using a ‘modern’ Web Component like approach, you often have directives request the same information from your services multiple times. Since we’d rather not do round-trips we don’t need to to save on server resources caching is our go-to solution. In this post I will show two different approaches to caching resources: the built-in angular way using $resource and a home-grown solution.

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Baking a Blog

One of my 2015 New Year’s resolutions was to finally turn my “I should write about this” notes into actual writing. So here we are! My first ever blog post! One of the things holding me back when it came to creating a blog is picking one of the many available blog frameworks, there’s just too many to choose from! I wanted something that’s easy to use and easy to back-up.

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Code Challenge “Vrolijke Framboos” Postmortem

Tuesday we had our second ever “Vrolijke Framboos” (Dutch for Happy Raspberry)
Java code challenge at JDriven and it was a blast! This year’s
challenge was to create a REST service client that would play a number guessing
game with the server. After setting up a session you would guess a number and the
server would respond with either “lower”, “higher” or “bingo”. The goal was to guess
as many numbers in the two minutes you’d be given. Given the name of the challenge
you can probably guess that the target platform would be a
Raspberry Pi!

It was an incredible and fun experience and in this post I want to explain how I
approached the challenge and how my solution ended up in the second place, making
me just miss the opportunity to take home the trophy and a new Raspberry.

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Communication between Angular Controller and Directive

Since I had issues finding a good explanation on how to tie together a controller and a directive with isolated scope I decided to create my own blog post on this subject. This repo contains a runnable example of the solution. It contains a Spring Boot Web Application that can be started to act as a HTTP server but all the interesting stuff is in the src/main/webapp folder.

Problem description

To create modular code with AngularJS you want to create reusable components; directives. Directives should not depend in any way on the parent controller. They should not be able to see any of the parent scope unless it’s explicitly provided to them. To do this Angular directives can have an isolated scope (which in my opinion should be the default). Continue reading