Configuring the Elastic Load Balancer of your Elastic Beanstalk application

elb-iconIn my previous post I showed how to run a Spring Boot application on AWS using AWS Elastic Beanstalk. In that post I mention that it is possible to bypass the default Nginx instance on the EC2 instance and have the Elastic Load Balancer communicating with a custom port on your EC2 instance(s) directly. In this post I show how to achieve that. Continue reading

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Run your Spring Boot application on AWS using Elastic Beanstalk

beanstalkAlthough I previously wrote how easy it is to get your Spring Boot application up and running on AWS by using Boxfuse I think it is good idea to have notion of some alternative ways to achieve the same. One of these alternatives is by using AWS Elastic Beanstalk. In this post I will describe the basic configuration to get your Spring Boot application running in the cloud on AWS. After the Elastic Beanstalk is created you will have at least one EC2 instance running on AWS with an Elastic Load Balancer in front of it. Also an Auto Scaling Group is provided and of course some Security Groups. When put in a diagram it looks like this (by the way, the database part will not be used in the example of this post):
I assume you already have an account for AWS. If not, go get your free subscription for the first year (mind the conditions to make sure it stays free). Continue reading

Posted in AWS, Spring Framework | Tagged , , | 3 Comments

Validating JWT with Spring Boot and Spring Security

spring-securityFor my current project I will have a REST API set up with Spring Boot (most likely running with BoxFuse). To be able to use the API endpoint the application will check that the incoming request has a valid JWT token provided earlier (by an API service that I trust).
To implement this functionality I want to make use of Spring Security as it fits nicely with Spring Boot. When googling for information about this combination I ran into this site that describes the background information quite nicely but didn’t give me all the necessary sources to get it running. So after some more investigating and trial & error I finally came to a working solution. Note that in my situation I only needed to validate an incoming token, I don’t need to create or supply new tokens. Continue reading

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Setting up https for your REST API with Boxfuse

boxfuse-logoIn my last post I showed how easy it was to get your REST API based on Spring Boot framework up and running on AWS with the help of Boxfuse. The next step is making use of SSL for the communication with the API. By using SSL we make sure our data is save during the transport between our REST API server and the API client. To setup SSL for the Spring Boot application you have to perform the following two steps:

  • Create a keystore
  • Configure the Spring Boot application

Continue reading

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Make running your Spring Boot application in the cloud super easy with Boxfuse

boxfuse-logoA few days ago I started building an iOS app that would be using a REST API to retrieve and store data. This REST API would be a server application that I also have to build. Since I am familiair with Java and Spring I decided to use Spring Boot as framework. To be able to use it with my iPhone it would be nice if I could run it on a server instead of my own development PC, so for this I choose AWS since I know how to use that. The only thing I hadn’t figured out yet was what would be the easiest way to get my Spring Boot application running on an AWS EC2 instance… Continue reading

Posted in AWS, Spring Framework | Tagged , , , , | 3 Comments

My first watchOS App for Apple Watch is in the AppStore

watchos-2.0After submitting my first app for the iPhone to the store I decided it was time to create an app for the Apple Watch. I already had the idea about the game I wanted to create for it but mostly it would be a great exercise for me to see what it takes to built such an app. The game might be known as ‘Simon Says‘.
At first the development of the WatchKit based app went well. Because the layout of the watch and available components are limited compared to the iPhone/iPad it makes creating the screens relatively easy. Since the screen of the watch is small only a few elements can be shown on them. Continue reading

Posted in iOS, XCode | Tagged , ,

Finished ‘iOS App Development with Swift’ specialization at Coursera

downloadAs I mentioned before I am working my way through Coursera’s specialization track ‘iOS App Development with Swift‘ that is given by the university of Toronto. Today I heard I accomplished the third part of the total of four.

I am not sure if I will take the last module as it consists of building a complete app ready to go in the App Store. And as you might already have read: been there, done that 🙂
Now it’s time to quite studying and start acting!
Screenshot at Mar 07 15-59-51

Posted in iOS, Swift | Tagged ,

My first Swift App is in the AppStore

_app_store_5122xAs I have mentioned in my posts for the last months I have been busy mastering the Swift language and XCode to be able to build iOS applications. I am proud to announce that my first app has made it to the App Store. It is available here. I was asked to build the App by a Dutch Company called ‘SimplyStress‘. Although the functionality of the App looked quite simple I learned a lot about building iOS apps and bringing them to the Store 😉
I know there is a lot more to learn about it so I will keep posting it here.

Posted in iOS, Swift, XCode | Tagged , , | 1 Comment

Example of using extensions in Swift

Recently I needed a image in my iOS app that was oscillating. I ran into an example of Swift code that showed how to do it and it was actually quite easy to do (for the theory behind the formula see this). The code makes use of the ‘extension’ feature in Swift. This is a really cool feature in Swift. The feature allows you to extend the functionality of a class without having to extend the class (like you would do in Java for instance). For a basic example of the feature see this example.
In my example the feature is used to extend the functionality of the SKAction class, another cool thing in the iOS SpriteKit library. Continue reading

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Starting developing in Swift: Using GitLab with XCode

Xcode_iconAs showed in my previous post I have set up a GitLab account so I can host my Git repositories there. In this post I will show how you can combine XCode (v7.1) with GitFlow and GitLab. In fact I will end up to use both XCode (for programming) and the Terminal (for my GitFlow) but that is the same when I am developing Java. In that case I also prefer the prompt most of the time for my (basic) Git stuff.
Continue reading

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