What are microservices?
Have you heard of Microservices yet? First time I heard the word I had strong associations with a new appliation for bacterial life in food processing. Maybe my background in biochemistry got the better of me.
Actually, the Microservices Architecture (MSA) is a new sprout on the ever-growing tree of Service-Oriented Architecture concepts. The definition sounds vaguely familiar: A particular method of designing (usually complex) enterprise software applications as suites of small, independent (more...)
It seems that my first blog post today "ALTER USER RENAME - A half official option
" got some great attentions :-)
How did I come to the ALTER USER RENAME command? Just a lucky punch due to my customer. My customer were trying to rename an user in an Oracle Database with several objects (tables, view, functions, types and so) by simply updating the sys.user$ table :-)
The result were better than (more...)
Many times DBA's have to rename / copy complete users/schemas from the current name to a new name within one database. Since several years DBA's are asking for a simple method inside Oracle to execute something like "ALTER USER RENAME".
Common approaches to rename users/schemas are:
- IMPDP with REMAP_SCHEMA
- update of sys.user$
For the option "update of sys.user$", which is in my opinion a really bad choice, see Tom Kyte's comment
In my previous post I made a mobile hybrid application with Google Maps integration. You can find it here.
Now let’s go a step further. An insurance company want’s that their customers can submit a damage immediately in case of an accident. A customer can download an app and install it on their device. When the customer is involved in an accident, he or she can open the app, enter some data and take pictures (more...)
The past week my colleague Patrick Sinke and myself attended the Oracle Fusion Middleware Forum 2016 in Valencia, Spain held from March 15th to March 18th. It was a week overloaded with information, networking and deep-dive workshops. We worked hard, learned a lot and had some fun once in a while as well. The event coinciding with the annual Las Fallas festival also helped with that last part
In this blog I would like to (more...)
Automatic memory management (garbage collection) is one of essential aspects of Java platform. Garbage collection relieves developers from pain of memory management and protects them from whole range of memory related issues. Though, working with external resources (e.g. files and socket) from Java becomes tricky, because garbage collector alone is not enough to manage such resources.
Originally Java had finalizers facility. Later special reference classes were added to deal with same problem.
If we (more...)
Hereby a script to change some properties for SOA Suite. These are some generic settings such as:
- Recovery Schedule Config
Read this article on my new blog
You can find a new tutorial that explains how to deploy an Apache Kafka application to MapR Streams, the tutorial is available here:
Getting Started with MapR Streams
MapR Streams is a new distributed messaging system for streaming event data at scale, and it’s integrated into the MapR converged platform.
MapR Streams uses the Apache Kafka API, so
Cedar held its annual Oracle Day in Oracle’s City office last Thursday – it was actually our 6th year of running the event. The attendance was great – just short of 100 – and with 3 streams of content there was plenty to choose from. If you weren’t there, here’s the highlights of the sessions that I attended:
After the opening keynote from Dan Woolstone, Oracle’s James King and myself spoke to a full room (more...)
On designtime we use the oramds to develop our processflows in our bpel processes.
Basically the composite.xml part for a bpel process would look like this :
<component name="saveEmployee" version="1.0">
<service name="client_ep" ui:wsdlLocation="oramds:/apps/xsd/myapp/1.0/saveEmployee.wsdl">
When you open the bpel in jdeveloper, jdeveloper will automatically add the next import to your .bpel file :
Boek – De Bijenherder
De Bijenherder is een management novel. Het boek is dus geschreven in de stijl van The Goal, The Phoenix Project, De Kracht van Scrum en bijvoorbeeld Getting Teams Done. Waarbij de laatste twee ook het aandachtsgebied delen met De Bijenherder.
Leiding geven aan zelfsturende teams
De zoektocht in het boek is die naar hoe leiding te geven aan zelfsturende teams. Door de toenemende omslag naar zelfsturende teams wordt ook (more...)
Experiences with Holacracy
There is a growing number of books on holacracy. One of the first on this subject without even coining the term was Eckart’s Notes. Also the ones on Semco (like Semco style and Maverick!) are gaining popularity. These all describe case studies, where Reinventing Organisations shows development stages in organization. These in turn are based on literature and case studies like the one that is described in Eckart’s Notes.
Since we (more...)
Read this article on my new blog
Ted Dunning and I have worked on a tutorial that explains how to write your first Kafka application. In this tutorial you will learn how to:
Install and start Kafka
Create and Run a producer and a consumer
You can find the tutorial on the MapR blog:
Getting Started with Sample Programs for Apache Kafka 0.9
Since 19th January 2016 the Critical Patch Update for January 2016 is out.
In case you are trying to apply the CPUJan2016 against an Oracle WebLogic Server 12.1.2 you may run into following error:
Verifying the update...
[ Error during Update inventory for apply Phase]. Detail:
There are 1 copy files under ORACLE_HOME that are not patched.
Files check failed: Some files under ORACLE_HOME are not patched.
Please see logfile for details.
HCM Data Loader (HDL) data ready to load into Oracle HCM Cloud is in pipe separated text file format, however most people will create and manipulate these files in MS Excel as it’s the handy swiss-army-knife for data manipulation that almost everyone is familiar with.
The way that we’ve worked is that we create template files containing the sheets and columns corresponding to the fields that the client is using, which the client then populates, (more...)
The ‘Year in Blogging’ reports have come through so I can see what posts and newsletter items garnered the most views.
The Fusion Tipster Blog
So, according to the summary, the most popular post was Introducing OTBI-E, followed by What’s Coming in Taleo 14B, and then the posts on specialisation. Of those, only the former was written in 2015, with the other two coming from 2014. The other popular posts written in 2015 (more...)
Stack trace sampling is very powerful technique for performance troubleshooting. Advantages of stack trace sampling are
- it doesn't require upfront configuration
- cost added by sampling is small and controllable
- it is easy to compare analysis result from different experiments
Unfortunately, tools offered for stack trace analysis by stock profilers are very limited.
Solving performance problem in complex applications (a lot of business logic etc) is one of my regular challenges. Let's assume I have another (more...)