Ramki Technical Blog

In this post I am going to demonstrate that how remotely control LED and how it can be connected to Raspberry Pi using MQTT protocol and control GPIO pins using pi4j library. This work is done  using Java code. Recently I bought Raspberry Pi 2, so I just wanted to do some learning stuff, basically how to blink (on/off)  LED remotely. I have performed extensive survey about Raspberry Pi on internet I found lots of stuff about connect LED with Raspberry Pi via GPIO pins. This created a lots of interest. So I m searched Java library to control gpio pins and I got pi4j library .   Actually pi4j library easy to learn and provide bunch of examples. Details of its are mentioned below:

In this post i will show Tomcat Clustering in Docker Container. In  my previous post i discussed how to achieve tomcat clustering with Nginx Front end . Its almost same scenario, but this time we will achieve via docker container. Docker Docker  is an  open-source  project that automates the deployment of  applications  inside  software containers , by providing an additional layer of abstraction and automation of  operating-system-level virtualization  on  Linux . [4]  Docker uses resource isolation features of the Linux kernel  such as  cgroups  and kernel  namespaces  to allow independent "containers" to run within a single Linux instance, avoiding the overhead of starting and maintaining  virtual machine   --Wikipedia