Building Optaplanner Applications using the BRMS Business Central GUI: The Missing Guide

1 Introduction

A potential customer is interested in seeing how BRMS Business Central can help him build an Optaplanner (also known as Business Resource Planner) application using the GUI alone after I demonstrated to him the Optometrist rostering app based on the Nurse Rostering sample application.

Optometrist Rostering App
Optometrist Rostering App

I wanted to create a simple Optaplanner app so I picked cloud balancing. The problem statement for cloud balancing can be found here:

A sample implementation can be downloaded here:

However, the rules in the sample implementation are in native .DRL syntax. The customer wants to see everything created using Business Central GUI tools, if possible. This is the reason why I wanted to re-create this example using Business Central.

Please note that you have to add the “plannermgmt” and “kie-server” roles to you user login to Business Central in order to see the Optaplaner-specific GUI and manage the execution server. Continue reading Building Optaplanner Applications using the BRMS Business Central GUI: The Missing Guide

Docker 101: A Tutorial – Part 2

Here is part 2 of my docker 101 article published in the ODROID Magazine. ODROID Magazine is a free monthly e-zine featuring hardware and software articles related to the latest ARM and single board computer technology since January 2014. Although this tutorial is designed to run on the ODROID-C2 single board computer, all the commands that you learn apply equally well on INTEL-based machines running the docker engine. The commands are exactly the same. Once learnt and you can apply your docker command line knowledge to different environments including Linux, macOS, Windows and on a cloud host.

Part 1 discusses the classic docker run and other commands that build and run containers on a single docker host.

Part 2 (to be published in the December issue of the ODROID Magazine) describes docker swarm mode’s clustering and orchestration capabilities.

Enjoy!

Click here to read my ODROID Magazine Docker 101 – Part 2 Article.

Docker 101: A Tutorial – Part 1

Here is part 1 of my docker tutorial published in the ODROID Magazine. ODROID Magazine is a free monthly e-zine featuring hardware and software articles related to the latest ARM and single board computer technology since January 2014. Although this tutorial is designed to run on the ODROID-C2 single board computer, all the commands that you learnt apply equally well on INTEL-based machines running docker engine. The commands are exactly the same. Once learnt and you can apply your docker command line knowledge to different environments including Linux, macOS, Windows and on a cloud host. Enjoy!

 

Read my ODROID Magazine Docker Tutorial here!

Building My Odroid-C2 Docker Cloud Part 4 – Application Deployment

Web Application with Database Backend

So far, I’ve only deployed trivial application on my docker cluster. In this article, I want to explore the level of difficulty in deploying a more realistic application. Being a lazy person who does not want to create a web application from scratch, I searched the Internet for a ready-made web application using a database backend as this kind of application is commonly deployed in the production environments. I came across a WEB4J sample application called the “Fish and Chips Club” which should do the job. From now on, I am going to refer to this application as “Fish”. This application includes features to:

  • edit club members
  • edit local restaurants
  • edit ratings of each restaurant
  • add new lunches (a given restaurant on a given day)
  • RSVP for each upcoming lunch
  • interact using a simple discussion board
  • produce simple reports
  • provide a simple search page

And it uses 3 databases running on MySQL. You can find out more about how to configure this application here.

The disadvantage of using ARM64 architecture machines like ODROID-C2 is that you don’t have that many docker images readily available to you on Docker Hub to choose from like INTEL-based machines. I can find only 1 MySQL docker image and no Apache Tomcat images at all! And this application requires Tomcat to run. However, this is not a showstopper as I can always create my own docker image!

In the following sections, I am going to deploy MySQL and Fish in different ways and assess their pros and cons. It will be a great learning experience for me as, like most of you, I am new to this too ;-) Continue reading Building My Odroid-C2 Docker Cloud Part 4 – Application Deployment

Building My Odroid-C2 Docker Cloud Part 3 – Build and Test Drive

The journey so far

My last article documented how I built Docker 1.12.0 from source on my Odroid-C2. Docker 1.12 has swarm mode ie, clustering built in. In this article, I am assembling my 5 Odroid-C2 single board computers into a cluster and test-driving the cluster with simple swarm mode commands.  This is to make sure that Docker 1.12 is working before getting into more advanced swarm mode features and executing a more realistic workload on the cluster in Part 4. Continue reading Building My Odroid-C2 Docker Cloud Part 3 – Build and Test Drive

Building My Odroid-C2 Docker Cloud Part 2 – Building Docker 1.12.0 (with Swarm Mode)

Recap

In my previous article, I documented my search for a stable Linux to run my Docker cloud on. The next thing for me to do is to select the version of Docker to use. I am in a dilemma in which I want to use the latest Docker 1.12 with inbuilt swarm mode instead of having to build my own cluster using additional packages such as Consul, Zookeeper, etc. but the version I got using apt-get is version 1.10. There is an update but it is still only 1.11. Since clustering (swarm mode) is in-built in 1.12, there is no point pursuing a dead end in Docker 1.11. Looking around the Internet, I could not find any pre-built Docker 1.12 package for Odroid-C2 anywhere. Reluctant as I was, I had no choice but to build my own Docker 1.12 for my Odroid-C2 from source. As I was new to this, I expected issues and confirmed that Murphy’s Law still rules. This article documents my attempt to build Docker 1.12.0 on my Odroid-C2. Continue reading Building My Odroid-C2 Docker Cloud Part 2 – Building Docker 1.12.0 (with Swarm Mode)

Making JBoss Fuse, Data Virtualisation and BPMS Work Together – Part 2

Recap

In the previous installment, I outlined the use case or business scenario we are implementing using the 3 JBoss middleware products. In this installment, I am going to describe the Fuse to Business-as-a-service (Business rules application on the Realtime Decision Server) integration which validates the XML data and the Fuse to BPMS integration which kicks off a business process instance for a mortgage application as well as the Fuse to JBoss Data Virtualisation integration. Continue reading Making JBoss Fuse, Data Virtualisation and BPMS Work Together – Part 2

Building My Odroid-C2 Docker Cloud Part 1 – In Search of a Stable Linux

Introduction

I’ve just taken delivery of 5 Odroid-C2 single board computers (SBCs) from Hardkernel. In case you don’t know, ODROID-C2 is a 64-bit quad-core SBC with specifications above and beyond those of Raspberry Pi 3. For example Odroid-C2 runs the quad-core 64-bit A53 processors at 2GHz (vs Raspberry Pi 3’s 1.2 GHz), Gigabit ethernet (vs 10/100 Mbps Ethernet), 2Gbytes of memory (vs 1Gbytes), supports 4K display (vs HD), etc.

I am planning to set up my 5 Odroid-C2 SBCs as a Docker cluster to form an experimental private cloud. But before I can do that, I must choose a stable Operating System (OS) for the SBCs to run on. Here is what I went through in selecting my OS. Continue reading Building My Odroid-C2 Docker Cloud Part 1 – In Search of a Stable Linux

Making JBoss Fuse, Data Virtualisation and BPMS Work Together – Part 1

Introduction

Red Hat has been using the phrase “Accelerate, Integrate and Automate”, for sometime now, to explain its comprehensive middleware portfolio to its customers. Red Hat middleware does not work in isolation. It is imperative that these different middleware products can work together to achieve a business outcome.

In this article, I am going to show you how to make the 2 “Integrate” products: JBoss Fuse (Fuse), JBoss Data Virtualisation (JDV) and the “Automate” products: JBoss Business Process Management Suite (BPMS)/JBoss Business Rules Management System (BRMS) work together. Since BPMS/BRMS and JDV run on JBoss Application Server (EAP), I can even claim that this example involves middleware products of all 3 categories ie, Accelerate, Integrate and Automate. Continue reading Making JBoss Fuse, Data Virtualisation and BPMS Work Together – Part 1

JBoss Data Virtualization Part 2 – An Example

Recap

In Part 1, I describe what Data Virtualisation is and how one product, namely JBoss Data Virtualisation, works and its architecture. In this instalment, I am going to describe the implementation of a virtual database using 3 data sources. I am also going to show you how to interact with the virtual database using the SquirrelSQL client. The intention of this article is to give you some ideas as to how easy it is to aggregate several data sources to construct a virtual database. It explains the implementation on a high level only and does not give a step-by-step instruction of how to do it from scratch. Continue reading JBoss Data Virtualization Part 2 – An Example