WebSinker–generic event detection for unhooked systems to trigger WebHook
Quite a few systems – business applications large and small – do not have support for WebHooks. That is: they do not offer the ability to register a URL …
Author: Lucas Jellema
Brief: What is Oracle Wallet?
An Oracle Wallet is an encrypted file that contains database credentials – username and password – for connecting to an Oracle Database. This avoids writing hard code user passwords …
Marrying Fn Functions to Dapr.io–leverage the power of the proxy
Project Fn provides a framework for creating and running serverless functions. It is the foundation for the Functions service on Oracle Cloud Infrastructure. Dapr.io is an open source project …
Query Past Generations in Oracle Database SQL – PI Day Special
Today is PI Day. March 14 or: 3-14 in the US. Of course it can be March 14th 2015 – 3-14-15 – only once but for some reason March …
Update Go on Linux
It turned out to be a fairly small deal. For reference sake a brief write up of updating the Go runtime on my Ubuntu environment. Current version: go version …
Connecting Go application to Oracle Database–On Prem and Autonomous , with and without Oracle Client libraries
I have been struggling a bit with this one: how to connect from a Go application to an Oracle Database – both a locally running database as well as …
Dapr and Kafka–easy binding
Dapr is a runtime framework for distributed applications. Dapr also provides a personal assistant to any application and environment that offers standardized access to different facilities (state, secrets, configuration, …
Quick Start Compute Instance on OCI (for software development)
I have worked quite a bit in Oracle Cloud, starting back in 2015. I have used many different OCI services – such as Integration, Streaming, Functions, OKE, API Gateway, …
Oracle Cloud Go SDK and Instance Principal based Authentication
In a recent article, I described the use of the OCI SDK for Go(Lang) – in my example to interact with the ObjectStorage service. In the article, I used …
Did I really just commit and push a file with a password in it?–Remove all traces of pushed Git commit
Surely I would never be so stupid as to commit a file that contains sensitive information – say my Oracle Cloud account’s private key. And even if I did, …
Submitting my Custom Dapr State Component as a formal Open Source Contribution–work in progress
I have used many open source products in my professional life. I have not studied the sources of many of these products and projects. My main contributions to the …
Composing DAPR Custom State Store Component for Oracle Cloud Object Storage
Dapr is a runtime framework for distributed applications as well as a personal assistant with many generic qualities relevant to any application. Through Dapr, applications can easily benefit from …
Interacting with OCI Object Storage using Go SDK (first steps)
I am still fairly new at working with Go. I have the ambition of working with and perhaps even on several open source projects that all use Go as …
Extending Local Dapr Development Environment for Custom Components
In a previous article I described how I prepared my local development environment from working with the source code of the Dapr project – locally editing, building and running …
Customizing Dapr–preparing my environment
In other articles I will write about the value of Dapr – as a personal assistant to any application that helps out with state, configuration and secrets, receiving inbound …
Dapr on OKE–Distributed Application Runtime on OCI Kubernetes Engine
One of the most exciting frameworks I have ran into into recent years is Dapr (dapr.io) – distributed application runtime. Dapr is a cross technology runtime framework that supports …
Dumb pipes, smart endpoints–the Post Filter, the register to stop unwanted mail
Many people receive mail at their front door that they do not want to receive. Commercial mail, mail from companies they may perhaps made enquiries with long ago, mail …
Getting started (again) with Kubernetes on Oracle Cloud
For many of my recent activities, I have not worked with or even on (knowingly at least) Kubernetes. So for many months I have not touched my OKE cluster …
Run and Access GUI inside VS Code DevContainers
VS Code DevContainers allow us to easily configure and run a container with our development tech stack for the specific project or product we are working on – and …
Getting started quickly with querying OCI from Terraform in Cloud Shell
Terraform is all about infrastructure (and platform) as code. Creating OCI resources through Terraform is probably the best way to manage your cloud resources. I have written several articles …
OCI DevOps Composite–creating Build & Deploy Pipeline resources using Terraform plans
I recently started a GitHub repo with Terraform plans for the creation of what I call OCI Composites – combinations of resources that will frequently be used together and …
VS Code Extension–GistPad–for quick gist creation, editing and consumption
Gists are the code snippets that you want to retain and share – with yourself and with others. Gists can be embedded in websites, blog articles and articles on …
Creating, Building and Invoking a Function on OCI with Terraform
Automation through infrastructure as code is the name of the game. And I am a player in that game. In the last few weeks I have spent a lot …
Visual Studio Code–the Code Tours extension for in context and interactive readme
The most popular IDE – VS Code – comes with a ton of extensions, and each can make life easier, more productive and more fun for developers. Recently I …
OCI DevOps Build Pipeline for Functions
Oracle Cloud Infrastructure offers the Functions service, a FaaS offering with serverless functions, based on container images built with the Project Fn FDK. In a previous article, I introduced …
OCI DevOps Deployment Pipeline for Functions–automation on Oracle Cloud
Oracle Cloud Infrastructure has a free DevOps cloud service that includes build and deploy pipelines in addition to source code and artifact repositories. I have written about OCI DevOps …
How to open IDCS Console from OCI– Finding the entry to Identity Cloud Service
I have just spent way too much time on finding the way to the Oracle IDCS console from within my OCI (Oracle Cloud Infrastructure) console. I was reading a …
Simple queries against Oracle Cloud NoSQL Database
I have been struggling in my first simple steps with querying data in a NoSQL Database table on Oracle Cloud. Creating the table is easy enough – either in …
Cleaning Out a Compartment on Oracle Cloud using Terraform provider
The situation: a Compartment on OCI should be removed. Or at least all its resources should be purged. Or at least most of the resources should be removed. The …
OCI DevOps–Build Pipelines and Code Repositories for CI
This article introduces Build Pipelines and Code Repositories in OCI DevOps (released on October 26th 2021) – complementing the Artifact Registry and Deployment Pipelines that were first launched in …
OCI DevOps–Free Automated Cloud Native Application Deployment to Oracle Cloud
Deployment is a term used frequently and often casually in software engineering. A term that for a long time was a bit cryptic to me. What exactly is deployment …
Scaling [down] the Mountain of Debt – Four dimensions of IT Debt
WYSIWYG may not be true for all IT systems. What you see may be more than what you actually get. As a Product Owner, you have to be very …
The Release Formula: R = ΔF + ΔNF + ΔQ
TL;DR: a software release introduces changes in three areas: functional, non-functional and quality. Each change should contribute to identified objectives – and the contribution should be measurable. Product teams …
The True Cost of a Feature–Kill your darlings
TL;DR: the true cost of a software feature includes a long tail of operational and maintenance cost that should be taken into consideration when first implementing the feature. The …
Polling Rank – Interactive Visualization Component for Ordering Options
TL;DR: live demo of the Poll Rank component on Code Pen: https://codepen.io/lucasjellema/pen/NWpoBeM Bringing things to order is a common requirement. Making clear how things are mutually ordered, which comes …
Visualizing Recipes in aid of Freshman Cooks
I am not the best cook in the world – it has been said. But I am making an effort to step up my game. My two sons have …
Implementing Serverless Multi Client Session Synchronization with Oracle Cloud Infrastructure
TL;DR – Multi Client Sessions can be facilitated in a fully serverless fashion. Two players playing Tic Tac Toe or Chess, teams collaborating on a document or diagram, an …
Serverless Distributed Multi User Browser Session Synchronization
Assume a browser based (or desktop electron) stand alone, client side only application. Multiple users are working with that application at the same time, on their own laptops and …
Introduction to D3 Force for Simulation and Animation
The D3 library is great for creating rich and interactive data visualizations running in your browser. D3 is a JavaScript library that provides an easy bridge between the power …
Starting my own Game Studio–on the ease and the power of SVG
My very first steps in programming consisted of typing in the BASIC program listings from computer magazines. Usually very simple games with very poor UX. That probably is the …