Author: Lucas Jellema
In a recent post, I introduced the managed Oracle Cloud Service for Kubernetes, the Oracle Kubernetes Engine (OKE): https://technology.amis.nl/2018/05/25/first-steps-with-oracle-kubernetes-engine-the-managed-kubernetes-cloud-service/. A logical next step when working with Kubernetes in somewhat …
Oracle recently (May 2018) launched its Managed Kubernetes Cloud Service (OKE – Oracle Kubernetes Engine) – see for example this announcement: https://blogs.oracle.com/developers/kubecon-europe-2018-oracle-open-serverless-standards-fn-project-and-kubernetes. Yesterday I got my self a new …
For conducting some experiments and preparing several demonstrations I needed a locally running Kafka Cluster (of a recent release) in combination with a KSQL server instance. Additional components from …
Put simply – CQRS (Command Query Responsibility Segregation) is an architecture pattern that recognizes the fact that it may be wise to separate the database that processes data manipulations …
I have a Windows laptop. And of course I want to work with Docker containers. Using the Docker Quickstart Terminal is one way of doing so, and to some …
This article describes how to quickly get going with KSQL on Kubernetes. KSQL is Confuent’s ‘continuous streaming query language’. It allows us to write SQL-like queries that operate on …
For workshop I will present on microservices and communication patterns I need attendees to have their own local Kafka Cluster. I have found a way to have them up …
In previous articles, I have talked about using Docker Containers in smart testing strategies by creating a container image that contains the baseline of the application and the required …
Here is a procedure for running an Oracle Database, preparing a baseline in objects (tables, stored procedures) and data, creating an image of that baseline and subsequently running containers …
Docker Containers can be stopped and started again. Changes made to the file system in a running container will survive this deliberate stop and start cycle. Data in memory …
My requirement in this case: a push of one or more commits to a GitHub repository need to trigger a Node application that inspects the commit and when specific …
The requirement is simple: a Node JS application that receives HTTP requests and forwards (some of) them to other hosts and subsequently the returns the responses it receives to …
My objective: create a Node application to download sources from a repository on GitHub. I want to use this application to read a simple package.json-like file (that describes which …
The challenge I describe in this article is quite specific. I have a Windows laptop. I have access to a remote Kubernetes cluster (on Oracle Cloud Infrastructure). I want …
This article is not some sophisticated treatise on Oracle JET fundamentals.It is merely a collection of challenges I had to deal with and found solutions for – that work, …
The essential message of this article is the automation for Oracle JET application of the flow from source code commit to a running application on Oracle Application Container Cloud, …
For one of our current projects I have done some explorations into the combination of ADF (and WebCenter Portal in our specific case) with JET. Our customer has existing …
It is nice – to push code to a branch in a Git repository and after a little while find the freshly built application up and running in the …
For one of our current projects I have done some explorations into the combination of ADF (and WebCenter Portal in our specific case) with JET. Our customer has existing …
Even for organizations with strong roots in relational databases such as Oracle RDBMS, there may be valuable opportunities for leveraging additional data sources, for example to support special (search) …
Even though ADF does not always play nice with guests, it is becoming increasingly common to have ADF applications – pure ADF or WebCenter Portal – that are the …
To select a country (or any other geographical entity), we can offer our end users a dropdown list, a list of values in a popup window, an auto suggest …
In a recent article I discussed how the open source geo, GIS and map library OpenLayers can be used in an Oracle JET application. That article shows how countries …
Oracle JET is a toolkit for the creation of rich web applications. Many applications will have location-related aspects. Such applications can benefit from advanced map capabilities – for presenting …
The Java Servlet specification does not include handling a PATCH request. That means that class javax.servlet.http.HttpServlet does not have a doPatch() method, unlike doGet, doPost, doPut etc. That does …
Oracle announced a managed Kubernetes Cloud service during Oracle OpenWorld 2017. This week, I had an opportunity to work with this new container native cloud offering. It is quite …
The situation discussed in this article is as follows: a rich client web application (JavaScript based, could be created with Oracle JET or based on Angular/Vue/React/Ember/…) is embedded in …
This article describes – in two installments – how events are used to communicate a change in a data record owned by the Customer microservice to consumers such as …
This article describes – in two installments – how events are used to communicate a change in a data record owned by the Customer microservice to consumers such as …
A fairly common combination of Oracle Public Cloud services that I use together – for example for the implementation of microservices – is DBaaS, Application Container Cloud, Application Cache …
Oracle Code Rome 2019 – Business and IT Agility Through DevOps and Microservice Architecture Powered by Containers and Cloud: https://www.youtube.com/watch?v=gm9vfK9fILM Turn Data into Business Value – Starting with Data …
This article will show how to run an Oracle Database on a Docker host using the prebaked images on Oracle Continer Registry. It is my expectation that it takes …
Oracle has been active with Docker for quite some time now. From the first hesitant steps from some enthusiastic employees with Docker build files that helped people to get …
In this article, I discuss my steps to get going with Istio on Kubernetes running on Minikube on Windows 10. Unfortunately, I have ran into an issue with Istio. …
Quick notes on the installaton of Minikube for trying out Kubernetes on my Windows 10 laptop (using VirtualBox –not Hyper-V) Following instructions in https://www.ibm.com/support/knowledgecenter/en/SS5PWC/minikube.html Download Windows installer for MiniKube: …
Project Fn is an open source project that provides a container native, poly-language, cloud agnostic (aka run on any cloud) serverless platform for running functions. Fn was launched during …
A short and simple article. I needed a Debian VM that I could use as Docker host – to run on my Windows 10 laptop. I resorted to Vagrant. …
In this article I will demonstrate how we can work with JSON based data – for analysis, exploration, cleansing and processing – in JShell, much like we do in …
In a recent article, I created an isolated Docker Container as Java 9 R&D environment: https://technology.amis.nl/2017/10/11/quick-and-clean-start-with-java-9-running-docker-container-in-virtualbox-vm-on-windows-10-courtesy-of-vagrant/. In this article, I will use that environment to take few small steps …
The messages from JavaOne 2017 were loud and clear. Some of these: Java 9 is here, the OpenJDK has all previously exclusive commercial features from the Oracle (fka SUN) …
