Posts Tagged PL/SQL

#DOAG2017 wrap up

doag_wegweiser

Another DOAG is over and here are my summary.

Day 1

As my presentation is planned for noon I arrived this year on the evening before, so I could attend the early sessions on 8:30.

Sten Vesterli: APEX, ADF, or ABCS? A real-life application built in 3 tools

He compares the development of a real application in APEX, ADF and ABCS. He don’t believe that ABCS is usable from end users and shows interesting problems with the date pickers in APEX and ADF.

Welcome by DOAG and Oracle

Stefan Kinnen from DOAG welcomes the attendees and gives an short overview for the conference. The part of the Kenneth Johansen from Oracle was very dry in the contrast.

Keynote: Neil SholayTracking the Inevitable (How to plan for likely and disruptive business scenarios.)

Quite the reverse the colleague of Kenneth Johansen. He present interesting views about the ongoing disruption in every business and how to prepare for this. Unfortunately the presentation is not available for download.

Markus Lohn: Road to the (Oracle) Cloud

The next title was pure understatement. As I know Markus expanded his talk to the details of a complex SOA & ESB migration report, which most of the attendees sure does not expect. I think at least my boss not :-). I left this a little earlier as now I had to go to stage.

Torsten Kleiber: PL/SQL: Therefore test automation for those who bind themselves forever!

After several presentations about ADF and the related development life cycle I decided this year to speak about the selection process of a PL/SQL testing tool. Additional I promised to do some of this last year. The room was packed with round about 100 people, which I unfortunately never reached with ADF in the past. Despite some technical problems when starting and in the demo’s all went fine and I will thank again all my attendees. You find my presentation additional here:

Because of some discussion with my attendees and lunch I skipped the next slot.

Sabine Heimsath, Jan Karremans: #DBADev – Like dog and cat? It doesn’t have to be!

This was a “lightweight” simulated battle between DBA and > as DB developers. I little bit oversimplified, but ok, unfortunately I seen none of our DBA’s in the audience.

Alexander Weber: Cloud service – heaven and hell (application and data away)

This was report> from a real world oracle database cloud customer with an APEX app. Maybe I will remind me to look at his experience, when we will ever go the cloud.

Bryn Llewellyn: Ten Rules for Doing a PL/SQL Performance Experiment

Bryn shows how to best analyze and broke down a performance problem and the idea’s are often not restricted to PL/SQL. Lession learned “Don’t use SET TIMING ON”, as this includes additional network roundtrips.

Elmar Juergens: The sow does not get fat from weighing: PL/SQL quality analysis

I see already a similar presentation from Elmar Juergens at Javaland 2017. Same message this time. Additional he recommend to measure at first only the changed source code via a diffing algorithm to only identifying the changed lines. Most tools can’t this. Will have a look at his own tool sometime. Additional our bosses want Elmar Juergens for a presentation for our developers. Will look if this will change their minds an they will look a least a bit more at the existing measured violation.

Day 2

Markus Klenke: Better, more beautiful, more modern: barely used beads in ADF

Markus likes ADF and show this. Fine that he is at our company site to help us with this.

Daniel Hillinger, Tobias Deml: Battle: Database Virtualization

First at the beginning the decision was made, who of the both is pro and who is contra. Nice format to find the arguments for this. I’ve learned that all databases in the same virtualization farm has to be the same license and options, if you want not to pay to much. Additional it’s not usual to begin if you have fewer than 100 database instances.

Thorsten Wussow: Let the orchestra play –- Docker orchestration and visualization

Unfortunately, my expectations were disappointed here because most demos didn’t work. Not a good start to use the technology.

Dominic Weiser: Continuous integration in database development

This was another nice database CI presentation which contains utPLSQL, and the presenter had enough time to show the CI part on Jenkins too. Similar you can find in my upload too, but I had enough time in my talk to present.

Duncan Mills: Web Components, the Oracle Way

Duncan describes how to define and use own components in Oracle Jet as professional as ever. Unfortunatly I see that he has moved from ADF product management to JET architecture team now.

Michael Schulze: Tools for diagnosing Weblogic (FMW) performance problems 

A surprice for me – lot of new tools and information for my toolchain.

Markus Lohn: Quo Vadis Agile Software Development

Again Markus on the stage. He shows his Agile project experiences on several customers and I’m not sure  if he mentioned us or not.

Bryn Llewellyn: Guarding your Data Behind a Hard Shell PL/SQL API – the Detail

Bryn shows here a security model for how accessing the data via an secure API which contains of 4 schema layers: data, code, implementation, API. Unfortunatly this is not really good handled by some of Oracle own development frameworks like ADF despite you develop only on the rest API on top. But definitely give it a try.

Roland Dürre, Knud Johannsen, Christian Botta: Creative communication

The paintings was good but the rest was very esoteric presentation of philosophic messages. I think I was to inspired by the vita of mr. Botta when selected this slot, this was what I had expected.

Before the evening keynote Ulrike Schwinn was awarded, congratulations! Over my career I heard a lot of presentations from her, which was impressive, none where I’m not learned something new.

Keynote – Karl-Heinz Land: Digital Darwinism: The Silent Attack on your Business Model and Brand

Good and provocative but unfortunately in my opinion also with some mistakes. The law of moore does not apply anymore, and as this was his main explanation, why all will be automated in the near future. Yes automation will happen, but only where a real business case is. If you see that over 50% of internet traffic is eaten by video streaming already, than I think this will hamper this process. Blockchain is not an oprating system, it is an distributed secure database. But it comes with cost, which actually is not paid, for example: A Bitcoin transaction consumes more electricity than a one-person household per month. And the verification of security need to many time. This has to be solved or Blockchain will only be used productive in edge case. Generally  I’m more a fan of WildDueck.

ADF Community Meeting

Unfortunately this was greatest disappointment of the whole DOAG conference for me. Once again we discussed several things

  • ADF is not visible from Oracle because not actually marketed
  • Errors in JDeveloper: the IDE for ADF and lack of support for this
  • Provide an Virtual Machine for ADF development. This is ok for trying out, but will not supported in restricted environment at customers as at my company – a bank. At least this should not be an replacement of support for JDeveloper
  • Should we open the community to other technologies like SOA, JET, ABCS an so on. My opinion: definitely no, as this is the final dead of ADF in the community.
  • We see that some of the important product managers move to JET and does not support us anymore.

In this atmosphere this year no common dinner happens after the meeting.

After that I spent the time with some colleagues at the evening party. This year I see early clearing the rooms of the NCC. I don’t know if the starting Scope alliance party was the cause, but maybe they will do this next year on the first day instead?

Day 3

Hans Eichenberger: DBaaS with APEX 5.1 Frontend and Oracle Multitenant Option 

Will repeat my tweet here: The developer dreams come true – getting an inhouse sandbox database in minutes from the DBA! Whoops – unfortunately not my company!

Adam Lukaszewski: Boost your Forms Development with GIT and Forms API Master

At the moment I define a future proof build and deployment process at my company for the loan platform. Part of this is security and mandatory review. So the presented Forms API Master tool is the perfect tool for handling the review and merge process of branches for our legacy Forms and Reports development. Will look how to implement this in Atlassian BitBucket.

Keynote – Robert Schröder: The Difference between Errors and Failures – Experiences in Aviation 

Key message are for me: Accept that failures happen, learn from failures and change your processes accordingly. Define a clear language for your business.

Marcus Hammer: Die Hürden großer ADF-Anwendungen

Not really new for us, but as we speak a lot with other colleagues from his company the solutions are mostly known for us – and for the whole ADF community in Germany. Interesting is the decision to implement batch processing in Java too, seems that it is problematic to get PL/SQL staff right now. I’m not understanding the decision to write an own framework for database deployment, but as this was not his own topic, he could not answer why Liquibase or Flyway does not fulfill their requirements.

Frank Munz: WebLogic 12c and Java Cloud Service

I missed Franks sessions last years, but often look at his slides in the web. This was a very good entry in differentiating the different Oracle Cloud Servives, which I could use for Java Develoment. Oracle Java Cloud Service is only one of it and should correctly named Oracle WebLogic Cloud Service. Great another naming dropping: Application Container Cloud should better by named as Language as a Service. Look at the slides to get the whole picture.

Alex Nuijten: Regular Expressions: Say What?

The best example that you can learn ever something new from a good presenter, despite you think you know all about a topic and you have already read the presentation before. For an example: a regular expression looks already for the longest possible match, which could be the whole string instead of the searched pattern. Interesting too the connect by regexp_count for splitting a string into rows. And look at the standard patterns in dbms_redact before you write your own, if it is not there write it in your own package for reuse.

Frank MunzMicroservices Runtimes

The second presentation of Frank I attend compares the actual available Runtimes on the market. But special interesting was the intro into micro services: are you sure you need this and do you know, what nobody tells you about latency and so on? Or do you know that accessing another micro service can need 100000 times more than accessing a functionality in the same monolith?

Conclusion

Again this year I attend colorful bouquet of presentations and again it pay’s off to look at the whole conference program and some abstracts and presentations before to minimize disappointments.

Generally I attend to few development sessions, maybe because I use other technologies or know already the presented topic.  But my feeling is that are really fewer development presentations.

Interesting is that finally many Development, Deployment, QA, TDD and CI/CD technologies used in other development languages find it’s way into classic Oracle development technologies like Oracle PL/SQL, Forms and Reports.

For the event organization I see a little degradation of service this year, for example the quality of the food or the cleaning of toilets and rooms. And a no go: Missing water for presenters in some rooms!

That’s it!

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“#PL/SQL: Therefore, whoever binds forever: automate your tests” – I’m a speaker at #DOAG2017

 

Today my presentation is confirmed: “Therefore, whoever binds forever: automate your tests”. Maybe the German title will be the better understood: “PL/SQL: Drum test-automatisiere, wer sich sich ewig bindet!”

I will speak over my experiences with following

  • several PL/SQL testing tools like at least
  • I will give you a demo of this tools and compare their capabilities for
    • architecture
    • branching
    • continuous integration
    • code coverage

If you speak german and you are interested in some of this, you should come and attend DOAG 2017.

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#DEVCAMP17 wrap up

 

Yesterday I attend the annual barcamp DEVCAMP of the DOAG development community. There are mostly developers with SQL, PL/SQL, Forms & Reports, ADF, JET background and some Java, Javascript and APEX developers too. And not to forget: 1 dba and some managers. Here are my summary.

I arrived on evening before just in time for the life cooking event and later at the bar to meet lot of the people I already know and some new too.

The morning begins with a short introduction to the format of a barcamp.

As warm up Jens Schauder starts with an talk about clean code. He begins to compare what the lack of hygiene for Middle Ages mean and the statement that we are in the IT Middle ages. In extreme cases not tested and not understandable software can kills people! So the task for every day is “write an test” and refactor the code to clean code.

Then the barcamp planning starts. In short time three slots are filled up and the really barcamp starts.

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Influenced by the starting talk next there was a session related to clean code and how to implement the related processes. You should teach a little bit of the theory behind it. It is essential to decide all rules with the whole team and review the continuous use of it. If the rules are not followed, then first you should ask why this happens and listen for the reasons. Jens Schauder recommends here these books. Maybe you have to adjust the rules to convince all developers. But in extreme cases of deny any of the decided rules you should escalate and delegate this to the responsible manager.

Next session was about how to test heterogeneous applications, especially SQL, PL/SQL and Forms but others too. I mentioned here two possible strategies, which both has it’s tradeoffs:

I noticed here that testing is mainly seen as to check the contract between developer and customer, sometimes useful for regression test but seldom as required for changing or refactoring the code. The participants seems to be overwhelmed by the amount of tools and effort to do automatic testing. Yes – there is a lot to do in advance, which pays off later.

In the next break I get a shortcut for actual requirement for forms change to implement some kind of SSO without additional servers. I get some nice hints and have now to check, if one of this is successful. This are the advantages of networking here.

The we discussed about Alternatives to Oracle Reports. Seems that it depends on your requirements, which tool to choose. Please do an value analysis here. So if you need pixel exact layout or want not pay much money Oracle Business Intelligence Publisher will not your friend. If you search for an active community maybe you should not choose Eclipse BIRT or at least use the commercial version from Actuate. But both of these and Jasper Reports are used from present participants. Further alternatives seem to be SAP Chrystal Reports and Pentaho. And don’t forget to test exotic features like widows and orphans!

After a coffee break we discussed the future of Oracle ADF. The punchline here was: ADF is not dead, but JDeveloper is very buggy. None of the participants does really miss any bit feature, but most struggles with the IDE. It seems, that the problems are bigger, when you work on windows. Maybe some of the product managers should be forced to worked again with windows to see our problems. I have articulated there 2 problems with the ADF community. I we try to raise the acceptance we should not try to extend the focus of the activities to alternative technologies as MAF or JET. Second we should not self call ADF into question on every conference, we should leave this part to the fans of other technologies.

The last session again turns around automatic testing of PL/SQL, some repeating to the described session above.

In closing session most of the participants said, that they want to come back next year. Maybe it is better to put some fixed sessions or workshops, as this is easier to describe to the bosses as “I will go this event, but it is not clear, what will happens there.”

Conclusion

I have learned not so much new things this year, but I attend these time more the known to me technologies. But I get the confirmation, that most of the things we do or plan do to are on the right track.

Unfortunately I observed some people in the sessions, which comes only to search for finding confirmations to reject for itself, what at least the initiator of the topic want to do.

You find more informations in Twitter

That’s it!

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