BPMN · Microservices · Uncategorized

Complex Form Evaluation with Drools

Introduction Complex business rules are best implemented using a ‘Rules Engine’. Drools is an open source Business Rules Management Product. See here   In this blog we will cover a few basics of using the Drools rule engine, specifically using a Domain Specific Language (DSL) which is a language that is more user focused. The… Continue reading Complex Form Evaluation with Drools

API · API Gateway · Microservices · Uncategorized

Conway’s law in API integration

At a couple of consulting engagements, I observed how Conway’s law is still relevant and used it to design better integration between software components. This blog post maps how organisation of software development teams in organisations doing API development can lead to a smoother/faster-to-market product and how this relates to a well know observation made by… Continue reading Conway’s law in API integration

API · Microservices · Uncategorized

Why is this not an API contract?

Why is this … my Swagger UI, generated from code not a contract? It describes my service, therefore it must be a Service Provider Contract. No?  This was a common theme for a few of our clients with mobile/web teams as consumers of enterprise services.  Service providers generated contracts, and would sometimes create a contract… Continue reading Why is this not an API contract?

API · API Gateway · REST · Uncategorized

Lessons from API integration

A general transition has been happening with the nature of work that I do in the integration space … we have been doing less of SOAP/XML/RPC webservices and more RESTful APIs for “digital enablement” of enterprise services .  This brought a paradigm shift and valuable lessons were learnt (rightly or wrongly) … and of course the process of… Continue reading Lessons from API integration

BPMN · Camunda · Open Source Software · Uncategorized

Camunda BPM – Manual Retry

The Camunda BPM is a lightweight, opensource BPM platform (See here: https://camunda.com/bpm/features). The “Cockpit” application within Camunda is the admin dashboard where deployed processes can viewed at a glance and details of running processes are displayed by the process instance ids. Clicking on a process instance id reveals runtime details while the process is running – process variables,… Continue reading Camunda BPM – Manual Retry

API · Microservices · REST · Uncategorized

Microservices with Docker and Spring Boot

This guide is for someone interesting in quickly building a micro-service using the Spring Boot framework. Works great if you have prior JAX-RS / Jersey experience Step-by-step guide Add the steps involved: Create a Maven Project Final Structure Pom ( Attached here ) Include Spring Boot Dependencies in your pom Parent Project <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId>… Continue reading Microservices with Docker and Spring Boot

Uncategorized

Dockerized Java Application Performance Analysis

Using JMX to analyse a Java Virtual Machine (JVM) within a local or remote docker image. The example below explores how to analyse a Tomcat Server (version 7) running in a docker instance using Oracle JRockit Mission Control (JMC) Your JRockit Mission Control is here OSX : “/Library/Java/JavaVirtualMachines/{JDK}/Contents/Home/bin/” Windows: “JDK_HOME/bin/”   Step-by-step guide Add the… Continue reading Dockerized Java Application Performance Analysis