My Steps for Getting Started with Java Development on Windows
In this article a brief overview of my steps to set up an environment on my Windows 10 laptop for doing Java programming. If you follow these steps, you …
Category: Software Development
Quarkus – Supersonic Subatomic Java, trying out some Quarkus code guides (part2)
In this article, you can read more about a Quarkus code guide I tried out, related to the following topic: Packaging the native executable in a container In a …
Quarkus – Supersonic Subatomic Java, trying out some Quarkus code guides (part1)
In my previous article, I already shared with you the Quarkus code guide “Quarkus – Creating Your First Application”, I tried out, including the hot deployment with background compilation. …
Using Vagrant and shell scripts to further automate setting up my Quarkus demo environment from scratch and trying out a Quarkus code guide
In my previous article, I shared with you the steps I took, to set up a demo environment, so I could get started with Quarkus. In this article, you …
Quarkus – Supersonic Subatomic Java, setting up a demo environment using Vagrant and Oracle VirtualBox
In November 2019, I attended Devoxx Belgium together with other AMIS colleagues. The yearly gathering of over 3000 Java developers (numbers provided by Devoxx website) were Java and software …
ADF Performance Monitor: New Introduction Video (3:40)
Are you unable to pinpoint frustrating blind spots and recurring problems in your ADF application? This video gives a quick introduction of the features of the ADF Performance Monitor, …
Write debug level logs on error – print detailed logging only in exceptional circumstances
TL;DR: Collect debug information in an in-memory buffer that is printed to the output when an error occurs (and quietly discarded in all other cases). I may have come …
Connect Azure Pipelines with sonarcloud through maven (YAML)
Introduction Sonarcloud is a static code analysis tool. This means that it checks out the code at your repository, does an analysis and shows you the results. It may …
Productivity Boosting features in Windows 10
I ran into a valuable 17 minute YouTube movie with tips over some useful Windows 10 features: https://www.youtube.com/watch?v=do06MPWf9E4 I created this short list as a personal reminder: Virtual Desktop …
ADF Performance Monitor: Thread Wait and Blocked Time
Last week we had a new version of the ADF Performance Monitor available – version 9.5. In this blog I will write on one of the new features; thread …
ADF Performance Monitor New Version 9.5
We have again a major new version of the ADF Performance Monitor available – version 9.5 ! We have added many new valuable features and improvements. Many overview screens …
DIY Kafka Topic Watcher tool – Node, Express, Server Sent Events and Apache Kafka
This article can be read in at least two different ways: as a somewhat lengthy introduction of a handy tool that you can easily run to inspect messages published …
Spring: Blocking vs non-blocking: R2DBC vs JDBC and WebFlux vs Web MVC
Spring Framework version 5, released in Sept 2017, introduced Spring WebFlux. A fully reactive stack. In Dec 2019 Spring Data R2DBC was released, an incubator to integrate relational databases …
Migrating an old (10.2.0.4) database to Oracle Cloud with minimal downtime
April 9, 2020
Oracle Cloud, AMIS, Architecture, Cloud, Database, Databases, DBA Oracle, Tools
2 Comments
Unlike most of our posts this post will contain almost no code or examples. But it hopefully will help somebody who ends up to be in the same situation …
The size of Docker images containing OpenJDK 11.0.6
When running Java applications in containers, you need to be careful with your resources. If you’re not careful with layering your images (for example using Google’s Jib), you can quickly …
Performance of relational database drivers. R2DBC vs JDBC
R2DBC provides non-blocking reactive APIs to relational database programmers in Java. It is an open specification, similar to JDBC. JDBC however uses a thread per connection while R2DBC can handle …
HTTP benchmarking using wrk. Parsing output to CSV or JSON using Python
wrk is a modern HTTP benchmarking tool. Using a simple CLI interface you can put simple load on HTTP services and determine latency, response times and the number of successfully …
jq – Linux command line tool for interpreting and manipulating JSON documents
I am not the first to discover jq, or even to write about it. However, jq was such a valuable tool for me that I felt obliged to share …
Apache Camel + Spring Boot: Different components to expose HTTP endpoints
Apache Camel is an open source integration framework that allows you to integrate technologically diverse systems using a large library of components. A common use-case is to service HTTP based endpoints. …
ADF Performance Monitor – Major New Version 9.0 (Part 1)
December 18, 2019
Frontend technology, Oracle Application Development Framework, Performance and tuning
No Comments
I’m very excited to announce that we have a major new version of the ADF Performance Monitor – version 9.0 ! We have added many valuable new features; new …
Java Microservices: What do you need to tweak to optimize throughput and response times?
Performance tuning usually goes something like followed: a performance problem occurs an experienced person knows what is probably the cause and suggests a specific change baseline performance is determined, …
The state of Java [developers] – reflections on Devoxx 2019
I attended Devoxx Belgium – November 2019. The yearly gathering of over 3000 Java developers (numbers provided by Devoxx website). Maybe not all of them Java and perhaps some …
Oracle Database: Write arbitrary log messages to the syslog from PL/SQL
Syslog is a standard for message logging, often employed in *NIX environments. It allows separation of the software that generates messages, the system that stores them, and the software that …
Calling out from Java to JavaScript (with call back) – leveraging interoperability support of GraalVM
Interoperability from Java to JavaScript has been an objective for the Java community for quite a while. With Rhino and later Nashorn, two valiant attempts were made to add …
Calling an Oracle DB stored procedure from Spring Boot using Apache Camel
There are different ways to create data services. The choice for a specific technology to use, depends on several factors inside the organisation which wishes to realize these services. …
Microservice framework startup time on different JVMs (AOT and JIT)
When developing microservices, a fast startup time is useful. It can for example reduce the amount of time a rolling upgrade of instances takes and reduce build time thus …
Apache Camel and Spring Boot: Calling multiple services in parallel and merging results
Sometimes you have multiple services you want to call at the same time and merge their results when they’re all in (or after a timeout). In Enterprise Integration Patterns …
A transparent Spring Boot REST service to expose Oracle Database logic
Sometimes you have an Oracle database which contains a lot of logic and you want to expose specific logic as REST services. There are a variety of ways to …
Performance! 3 reasons to stick to Java 8 for the moment
It is a smart thing to move to newer versions of Java! Support such as security updates and new features are just two of them but there are many …
ADF Performance Monitor: Error Diagnostics
Application errors are often hard to retrieve, or take a lot of time to resolve. When you are suffering from errors, and have a lack of clarity when errors …
Customer Case: New Server Infrastructure Halves Server Process Time
Recently I was analyzing and troubleshooting the performance of an ADF application. Much was already improved before I came. Due to a very recent new hardware/infrastructure environment, the server …
Building a RESTful Web Service with Spring Boot using an H2 in-memory database and also an external MySQL database
In a previous article, I talked about an environment, I prepared on my Windows laptop, with a guest Operating System, Docker and Minikube available within an Oracle VirtualBox appliance. …
How to use any Oracle JET Component in VBCS
Oracle JET has more components than available in VBCS. Using Web Components you can extend VBCS yourself with the missing JET components. In Oracle JET you can add a …
ADF Performance Monitor brings performance improvements and Insight at Intris
January 9, 2019
Oracle Application Development Framework, Performance and tuning, Technology, Tools
No Comments
Intris is the leading Belgian provider of freight forwarding, customs and warehousing management solutions. Headquartered in Antwerp, Intris provides its integrated software and cloud-based solutions to logistics services providers …
Devoxx Belgium 2018, From Developers For Developers
Last November, I attended the Devoxx Belgium 2018 event. In this article I gathered some practical information about the event, and the sessions that were held. Perhaps this gives …
Expose Docker Container services on the Internet using the ngrok docker image
The challenge: you are running a service, API or web application in a Docker container, locally on your laptop or in a cloud based VM or container platform. You …
Don’t ask what you can do for documentation – ask what documentation can do for you! (a top down perspective on documentation)
How much documentation is enough documentation? What are the requirements in the definition of done regarding documentation? Cannot simply all code be self-documenting? These are common questions in DevOps, …
JVM performance: OpenJ9 uses least memory. GraalVM most. OpenJDK distributions differ
In a previous blog post I created a setup to compare JVM performance of several JVMs. I received some valuable feedback on the measures I conducted and requests to …
Comparing JVM performance; Zulu OpenJDK, OpenJDK, Oracle JDK, GraalVM CE
There are many different choices for a JVM for your Java application. Which would be the best to use? This depends on various factors. Performance being an important one. …
Monitoring Spring Boot applications with Prometheus and Grafana
In order to compare the performance of different JDKs for reactive Spring Boot services, I made a setup in which a Spring Boot application is wrapped in a Docker …