Design patterns: Observer pattern implementation in Java
Observer pattern is a design pattern with an intent to define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
Ansible force remote user with Vagrant 1.8
My Ansible playbook stopped working when using Vagrant 1.8 or above. The problem seems to be with changes made in Vagrant.
Ansible skipping localhost when using Vagrant
Vagrant Ansible provisioner skips plays that are meant to be run on localhost. There’s a simple workaround for that.
Java 8: CompletableFuture
CompletableFuture is an implementation of the Future interface but with a modern twist. It takes advantage of functional operations to promote asynchronous/event-driven programming model.
Using Ansible to manage SugarCRM 7 environments and deployments
I’ve decided to use Ansible to manage SugarCRM environments and deployments. Here’s an overview of Ansible playbooks I’ve created.
Chaining Optionals in Java 8
Optionals in Java can help you to write a program without null checks. Chaining Optionals in a Stream enables to pick the first Optional which has a value and return it.
Using a serial monitor with SparkFun ESP8266 Thing on Linux
Using Arduino IDE’s serial monitor with SparkFun ESP8266 Thing does not work. In this post you’ll see how to use a serial terminal with the SparkFun ESP8266 Thing on Linux.
Optionals in Java 8
If you have had any experience with Java, then you most likely have seen the NullPointerException. Optional in Java 8 are a way to fight them.
The fork/join framework in Java
Introduced in Java 7, the fork/join framework is used to divide a parallelizable task into smaller ones and afterwards combine the intermediate results to get the end result.