2 Get going with KSQL on Kubernetes
This article describes how to quickly get going with KSQL on Kubernetes. KSQL is Confuent’s ‘continuous streaming query language’. It…
Author Lucas Jellema
Lucas Jellema
Lucas Jellema, active in IT (and with Oracle) since 1994. Oracle ACE Director and Oracle Developer Champion. Solution architect and developer on diverse areas including SQL, JavaScript, Kubernetes & Docker, Machine Learning, Java, SOA and microservices, events in various shapes and forms and many other things. Author of the Oracle Press book Oracle SOA Suite 12c Handbook. Frequent presenter on user groups and community events and conferences such as JavaOne, Oracle Code, CodeOne, NLJUG JFall and Oracle OpenWorld.
18 15 Minutes to get a Kafka Cluster running on Kubernetes – and start producing and consuming from a Node application
For workshop I will present on microservices and communication patterns I need attendees to have their own local Kafka Cluster.…
1 Remote and Programmatic Manipulation of Docker Containers from a Node application using Dockerode
In previous articles, I have talked about using Docker Containers in smart testing strategies by creating a container image that…
0 Quickly spinning up Docker Containers with baseline Oracle Database Setup – for performing automated tests
Here is a procedure for running an Oracle Database, preparing a baseline in objects (tables, stored procedures) and data, creating…
3 First steps with Docker Checkpoint – to create and restore snapshots of running containers
Docker Containers can be stopped and started again. Changes made to the file system in a running container will survive…
0 Handle a GitHub Push Event from a Web Hook Trigger in a Node application
My requirement in this case: a push of one or more commits to a GitHub repository need to trigger a…
2 Node & Express application to proxy HTTP requests – simply forwarding the response to the original caller
The requirement is simple: a Node JS application that receives HTTP requests and forwards (some of) them to other hosts…
0 Create a Node JS application for Downloading sources from GitHub
My objective: create a Node application to download sources from a repository on GitHub. I want to use this application…
0 Get going with Project Fn on a remote Kubernetes Cluster from a Windows laptop–using Vagrant, VirtualBox, Docker, Helm and kubectl
The challenge I describe in this article is quite specific. I have a Windows laptop. I have access to a…
0 Some of my Solutions for challenges with Oracle JET
This article is not some sophisticated treatise on Oracle JET fundamentals.It is merely a collection of challenges I had to…
0 Oracle JET Web Applications – Automating Build, Package and Deploy (to Application Container Cloud) using a Docker Container
The essential message of this article is the automation for Oracle JET application of the flow from source code commit…
0 Pure Client Side Event Exchange between ADF Taskflows and Rich Client Web Applications such as Oracle JET, Angular and React
For one of our current projects I have done some explorations into the combination of ADF (and WebCenter Portal in…
0 Set up continuous application build and delivery from Git to Kubernetes with Oracle Wercker
It is nice – to push code to a branch in a Git repository and after a little while find…
0 Communicate events in ADF based UI areas to embedded Rich Client Applications such as Oracle JET, Angular and React
For one of our current projects I have done some explorations into the combination of ADF (and WebCenter Portal in…
0 Introducing Elastic Search NoSQL to Oracle SQL developers – comparing dozens of ElasticSearch and SQL operations (a bit like Rosetta)
Even for organizations with strong roots in relational databases such as Oracle RDBMS, there may be valuable opportunities for leveraging…
0 Publish Events from any Web Application in IFRAME to ADF Applications
Even though ADF does not always play nice with guests, it is becoming increasingly common to have ADF applications –…
0 Promoting a simple Oracle JET input text component to a Visual Country Selection component
To select a country (or any other geographical entity), we can offer our end users a dropdown list, a list…
0 Using an OpenLayers map to select countries in an Oracle JET application
In a recent article I discussed how the open source geo, GIS and map library OpenLayers can be used in…
0 Embedding OpenLayers in Oracle JET for Advanced Maps and GIS style User Interfaces
Oracle JET is a toolkit for the creation of rich web applications. Many applications will have location-related aspects. Such applications…
0 Handle HTTP PATCH request with Java Servlet
The Java Servlet specification does not include handling a PATCH request. That means that class javax.servlet.http.HttpServlet does not have a…