PaaSForum and the talk with the two ladies…

It's already been a week or three that I've been to the excellent PaaSForum '18 in Budapest.
Much is already said and written about it. About the talks and breakout sessions.
To see and hear about the state of art of the Oracle PaaS products: every year I'm having a good time with Oracle Friends around Europe and beyond.

It was nice to play around with API Management, Dynamic Processes, Oracle JET and ChatBots. And, ... (more...)

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 this deliberate stop and start cycle. Data in memory and running processes obviously do not. A container that crashes cannot just be restarted and will have a file system in an undetermined state if it can be restarted. When you start a container after it was stopped, it will go through its full startup routine. (more...)

Regenerate Oracle VM Manager repository database

Some quick notes to regenerate a corrupted Oracle VM manager repository database.

How did we discover the corruption?
The MySQL repository databases was increasing in size, the file “OVM_STATISTIC.ibd” was 62G. We also found the following error messages in the “AdminServer.log” logfile:

####<2018-02-13T07:52:17.339+0100> <Error> <> <ovmm003.gemeente.local> <AdminServer> <Scheduled Tasks-12> <<anonymous>> <> <e000c2cc-e7fe-4225-949d-25d2cdf0b472-00000004> <1518504737339> <BEA-000000> <Archive task exception: No such (more...)

SQLDeveloper: User Defined Extensions and ForeignKey query revised

It was so fun: yesterday I wrote  a small article on creating a query on Foreign Keys refering a certain table. A post with content that I made up dozens of times in my Oracle carreer. And right away I got 2 good comments. One was on the blog itself.

And of course Anonymous is absolutely right. So I added 'U' as a constraint type option.

The other comment was from my much appreciated (more...)

Which tables have foreign keys refering to a particular table?

Ok, this time a quick not so exciting post. Actually, I find my self recreating a query again, that I created many times in my carreer. So, why not post it?

Last year, I published my Darwin Object Type Accelerator (Dotacc). It allows you to generate objects from a datamodel. What it also does is create collection types for tables that refer to the tabel you want to generate an object for. For some you (more...)

Exploring AR

Since back in 2015 when we got the Not-For-Sale developer model of Samsung Gear VR Innovator Edition which only works with Samsung Note 4, we started to set our eyes on the development of immersive digital media experience of virtual reality.

The original Gear VR in 2015. Feels so ancient ????

Along the way, we have researched on enterprise VR use cases, device platform, and development technologies. We created virtual gadget lab as soon as A-Frame (more...)

Research on Emerging Tech Like AI, IoT Aims to Make Your Work More Efficient

Cross-posting this bit I wrote for the official Oracle Application User Experience blog, enjoy.

Recently, at Oracle CloudWorld in New York, Oracle President Thomas Kurian talked about how emerging technologies can change the way you do your job for the better.

Investigating this impact is the primary focus of the AppsLab, the Oracle Applications User Experience (OAUX) Emerging Tech team, and it is what my team and I explore every day.

A recent (more...)

Set the minimum password length on your default authenticator in Weblogic

End of last year I wrote how to create a demo community of users in your Weblogic using wlst.
Using these scripts I wanted to do the same at my current customer: creating test users in the DefaultAuthenticator. However, I faced that the minimum password length was 8, while one of the user failed creation, because the password was the same as the user, and only 5 characters long.

So I need to change the (more...)

Weblogic 12c + SAML2: publish your metadata over an URL

This week I got to do a SAML2 implementation again for APEX against ADFS. Actually the same setup as last year. One pitfall I fell into with open eyes, was the Redirect URI on the 'Web SSO Partner Provider'. I entered /ords/f*, but it had to be with out the wild-card: /ords/f. But that aside.

At one step in the setup of a SAML2 configuration is that you have to publish the metadata, by (more...)

How to install the Notepad++ 64-bit plugin manager

I'm a Notepad++ fan for years. And as soon as a 64-bit version arose I adopted it.
But since a few months I have a new laptop, and I apparently didn't get the plugin manager with the latest new install.  And only now I took the opportunity to sort it out and write about it.

I found that the plugin manager is available since April 2017 on GitHub, version 1.49. I downloaded the (more...)

Shoe Treads

In December our team was allowed two weeks to pursue a “passion project”. It didn’t have be work-related, just something you truly wanted to work on. I chose to design tread patterns on the soles of shoes.

I had never given a thought about shoe treads until, a week earlier, a woman on the NodeBox forum asked for help creating organic shoe patterns. I asked her to elaborate on what she meant by “organic” and (more...)

SoapUI: validate a date field in response with current date

Once in a while you need to validate a service that has dates in the response. Although SoapUI has xpath and xquery match assertions, validate against strings is quite difficult. How to do a date comparison against for instance the current date?

You can do it with a script assertion:
And the content of this can be:
def groovyUtils = new
// Set Namespaces
def holder = groovyUtils.getXmlHolder(messageExchange.responseContent)

Modify your in wlst

In 2016 I did several posts on automatic installs of Fusion MiddleWare, including domain creation using wlst.

With weblogic 12c you automatically get a pre-configured per-domain nodemanager. But you might find the configuration not completely suiting your whishes.

It would be nice to update the file to with your properties in the same script.

Today I started with upgrading our Weblogic Tuning and Troubleshooting training to 12c, and one of the steps is (more...)

Run SQLcl from ANT

I think since last year ORacle released SQLcl which could be seen as the commandline variant of SQL Developer. But even better: a replacement of SQL Plus.

A few years ago I created what I called a InfraPatch framework, to do preparations on an infrastructure as a pre-requisite for the deployment of services and/or applications. It can run WLST scripts for creating datasouces, jms-queues, etc.  It also supported the running of database scripts, but (more...)

OSB 12c Customization in WLST, some new insights: use the right jar for the job!

Problem setting  and investigation

Years ago I created a Release & Deploy framework for Fusion Middleware, also supporting Oracle Service Bus. Recently revamped it to use 12c. It uses WLST to import the OSB service to the Service Bus, executing the config file.

There are lots of examples to do this, but I want to zoom in on the execution of the customization file.

The WLST function that does this, that I use is as (more...)

Create the SOA/BPM Demo User Community, with just WLST.

As said in my previous post (I've learned somewhere you should not post twice on the same day, but spread it out over time), I'm delivering a BPM 12c training. And based it on the BPM Quickstart. Although nice for UnitTests and development, the integrated weblogic lacks a  proficient set of users to test your task definitions.

Oracle has a demo community and a set of ANT and Servlet based scripts to povision your SOA (more...)

BPM Exception when deploying BPM project with Human tasks

This week I deliver a BPM 12c Workshop, that I based on the BPM QuickStart. When the students worked on the lab on Human Workflow, they hit an error deploying the Composite, where in the log you can find something like:

Caused By: oracle.fabric.common.FabricException: Error occurred during deployment of component: RequestHolidayTask to service engine: implementation.workflow, for composite: HolidayRequestProcess: ORABPEL-30257

exception.type: ERROR
exception.severity: 2

Oracle x Girl Geek Dinner definitely does compute

Oracle hosted its first Girl Geek Dinner last Thursday, December 7, 2017. The dinner was 18 months in the making. With at least 400 women and men in attendance, it is the largest Girl Geek Dinner of the year.

Alexa Push Notifications via Reminders

From the first day I got the Amazon Echo in December 2014 I looked for more interesting ways to interact with it. Before the Alexa team released an official API, I came up with a rather creative way to control things . It was not perfect since I had to add things to the “todo” list and then poll private APIs for changes. A few months later the official API came and things have been (more...)

OSB: Disable Chunked Streaming Mode recommendation


These weeks I got involved in a document generation performance issue. This ran for several months, maybe years even. But it stayed quite unclear what the actual issue was.

Often we got complaints that document generation from the front-end application (based on Siebel) was taking very long. End users often hit the button several times, but with no luck. Asking further, it did not mean that there appeared a document in the content management (more...)