#Javaland 2017 wrap up

Yes – I did it again and attend Javaland conference in Phantasialand Brühl.

It was not easy this year to concentrate on the sessions because of the hottest march of the last 100 years. But the quality of the sessions beats the weather. Maybe again my invest in reading the abstracts and filter the sessions before the conference has payed off.

Day 1 Conference

Jens Schauderdocumentation & slides with AsciiDoc, Git, Gradle and Reveal.js

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Big Announcement – New Job, New Country (A New Career In A New Town)

After 5 1/2 years at Oracle Corporation, I’ve decided to leave and take on a very exciting new challenge !! President Trump’s office have accepted my nomination to head their IT department in Washington DC, where I’ll be responsible for ensuring all USA government data is stored in a extremely efficient and secure manner. So secure, that […]

Oracle E-Business Suite Mobile and Web Services Security Explained – Starting with URL Firewall

This is the sixth posting in a blog series summarizing the new Oracle E-Business Suite 12.2 Mobile and web services functionality and recommendations for securing them.

How are web services secured in Oracle 12.2? To start at the beginning, the “front door” of the Oracle E-Business Suite is its web server, the Apache server deployed within the WebLogic server that is installed with release 12.2. To secure an Apache web server largely (more...)

Exadata Upgrade to 12.2.0.1 – The Missing Step

I decided this week to be a little brave and upgrade one of the Enkitec Exadata racks to 12.2.0.1.  I installed the 12.2.1.0.0 Exadata image a few weeks ago, and have been waiting for a chance to upgrade clusterware to 12.2.  Thankfully, Oracle provides a very good note for this, but I did hit one large snag that should be documented.

The process for upgrading GI to 12.2 (more...)

Who Likes Me?

In my previous entry, Fun with Facebook, I described how to pull data from Facebook’s Graph API Explorer, organize it using NodeBox, and turn it into representations of friends, posts, and the “likes” that connect them. Here is the final result:

The final “Who Likes Me?” poster

The above image is a snapshot of a high-resolution poster with many fine details. One of my goals for this project was to create (more...)

Nokia 6 – XPERIA XZ PREMIUM – LG G6 – HUAWEI P10 – BLACKBERRY…



Nokia 6 - XPERIA XZ PREMIUM - LG G6 - HUAWEI P10 - BLACKBERRY KEYONE - 2017 Hot Releases

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On Measuring Apache Spark Workload Metrics for Performance Troubleshooting

Topic: This post is about measuring Apache Spark workload metrics for performance investigations. In particular you can find the description of some practical techniques and a simple tool that can help you with Spark workload metrics collection and performance analysis. The post is released with accompanying code on GitHub: sparkMeasure

Introduction to Spark performance instrumentation

  
From recent experience I find that scalability and performance are some of the key motivating factors that drive people (more...)

Oracle BPM: Time for Time Out (2)

In a previous blog posting I discussed a solution to re-initiate a scope in BPMN that is supposed to time out after some time. In this posting I discuss how that solution inspires a couple of other use cases where a time out has to be re-initiated by calling an operation on the process.

In the following process model there are three flow, for three different use cases to re-initiate the time-out of:

  1. A process (more...)

OUG Ireland 2017 Presentation

Here are the slides from my presentation at OUG Ireland 2017. All about running R using SQL.

Frequent APEX questions

I've put a call out on the OTN APEX forum asking for suggestions from the community on what they think are frequent APEX questions, be it within the forum or elsewhere.

In part, I'm chasing ideas for content in future presentations, or blog posts. I welcome others to do the same. I think if we share our perception of common questions, better resources will come.

So please, feel free to contribute in any way, shape, (more...)

Take a few minutes to patch Oracle APEX 5.1

Yesterday a first patch set of Oracle Application Express (APEX) 5.1 has been made available to download.

one-of patches

If you encounter issues, you can ask for support and most likely a bit later a patch is made available through support.oracle.com. The APEX team is doing a great job with this.

For example some people using APEX Office Print had an issue which was caused by a bug in APEX_JSON (more...)

Make Radio Group look like UT Buttons

It's pretty easy to convert links in APEX reports to use the Universal Theme button look & feel, as I described here

http://www.grassroots-oracle.com/2015/12/tutorial-include-action-button-in-report.html

We can apply the same technique to radio groups, but it requires a little more work than just adding some classes, but nothing like jQuery mobile radio fiddles.

It took me a few goes to get the correct string in the correct APEX attribute to make the individual buttons (more...)

Apex 5.1.1 released

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| Mar 29, 2017
The latest version of Oracle Application Express has been made available yesterday for download from Oracle as reported by Joel Kallman. As usual a number of issues and bugs have been fixed, read more in Apex 5.1.1 patch set notes. Enjoy.

Oracle Application Express 5.1.1 now available

Just in time for APEX World 2017, Oracle Application Express 5.1.1 is now released and available for download.  If you wish to download the full release of Oracle Application Express 5.1.1, you can get it from the Downloads page on OTN.  If you have Oracle Application Express 5.1 already installed, then you need to download the APEX 5.1.1 patch set from My Oracle Support.  Look up patch (more...)

Amazon Echo Dot 2nd Generation Review – Echo 2nd Generation…



Amazon Echo Dot 2nd Generation Review - Echo 2nd Generation Features - Echo Dot vs Echo

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Oracle RAC 12.1 – lsnodes exited with code 9

I was trying to do a 2 node RAC setup on Solaris 11.3 where Oracle Solaris Cluster 4.3 was already configured. Installed was running but the Cluster Node Information screen was appearing like this

error

The install log shows this:

INFO: Checking cluster configuration details

INFO: Found Vendor Clusterware. Fetching Cluster Configuration

INFO: Executing [/tmp/OraInstall2017-03-28_12-50-48PM/ext/bin/lsnodes]

with environment variables {TERM=xterm, LC_COLLATE=, SHLVL=3, JAVA_HOME=, XFILESEARCHPATH=/usr/dt/app-defaults/%L/Dt, SSH_CLIENT=172.16.64.55 56370 22, LC_NUMERIC=, LC_MESSAGES=, MAIL=/var/mail/oracle, PWD=/export/software/grid/grid, XTERM_VERSION=XTerm(320), (more...)

Customize your Interactive Report with CSS

A lot of you are using jQuery to customize visual parts of an APEX application. I probably to often do so myself but there is a much more elegant way:   CSS

Nowadays you are able to add different kind of rules into your CSS styles. In this example I will show you how to get into the topic by changing an Interactive Report (IR). In my example I want to change the typical group by (more...)

On Measuring Apache Spark Workload Metrics for Performance Troubleshooting

Topic: This post is about measuring Apache Spark workload metrics for performance investigations.

Fun With Facebook

I am often surprised by which of my Facebook posts are the most liked and by who likes what. I wondered: are there any interesting patterns there? Could I visualize them?

My next question (as always) was: could I get the data? Thanks to the rise of  the API economy I could. Companies have discovered it’s profitable to make their private data public. IT departments are splitting into private and public-facing sides. Public APIs (more...)

Good old BIN_TO_NUM to check the overall status

A good while ago Chris Saxon, member of the AskTom answer team, asked on twitter which datatype you use when defining tables when you need a Boolean-representation. As you might know there is no Boolean datatype in SQL.
A lot of discussion followed which I'm not going to repeat.
Usually I use a VARCHAR2(1) with a check constraint for Y and N, but for a recent requirement I decided to use a NUMBER instead.

(more...)