Posts by Lucas Jellema
ADF 11g: programmatically configuring sort for rich table
1A recent requirement on one of our ADF 11g projects: we want to gather a number of settings a user has applied to the rich table in one of the pages. These settings include position, width and visibility of columns (supported by change persistence) and custom data filter, sort configuration and highlight condition. These latter settings are not part of change persistence out of the box. An additional requirement is that this collection of settings is to be saved under a label and to be made available to all users for selection when they view that same table.
I like these requirements. They are tangible, concrete and add fun(ctionality) to the application that directly pleases the end users. With ADF 11g, it is not an extremely difficult requirement – it seems.
One of the aspects mentioned here – sort setting – requires us not only to intercept or capture changes in sort settings – which sortListener on the columns of the table will do nicely – but also the programmatic application of sort settings when the table is rendered and a ‘user saved packet of table settings’ is selected.
In this article I take a very brief look at how to programmatical set the sorting condition on the rich table’s columns.
Book Review: Do More with SOA Integration: Best of Packt (december 2011, various authors)
0Recently I received an electronic copy of a new publication from Packt Publishing, one of the most active publishing companies in the area of (Oracle related) SOA technology. I was asked to review this book – and having enjoyed various earlier Packt titles (such as the recent OSB Cookbook and SOA Suite 11g Developer book ), I gladly accepted this invitation.
The anthology format
This book is special in that it was never intended to be a single book: it is composed from chapters that were published before, in 8 different earlier publications by Packt. That in itself is an interesting premise: a ‘compendium’ or ‘a book formed by drawing existing content from several related Packt titles. In other words,
Fusion Middleware 11gR1 – Patch Set 5 is available (at last) – First impressions
0It had been announced at Oracle Open World 2011 and sort of promised for December 2011 – a promise or at least a suggestion reiterated in early December even. But for whatever reason, it slipped – not shipped – and Christmas break that perfect time of the year for playing with new software came and went. Now at last, it has arrived. As of midnight CET on 22nd February, PS5 (11.1.1.6) was published on OTN and eDelivery (https://edelivery.oracle.com/EPD/Download/get_form?egroup_aru_number=11493752) for download.
One of the reasons for the delay was the certification of FMW 11gR1 PS5 with Fusion Applications that was done over the last few months. Apart from the additional wait time (that is now over), this is quite good and important news: when Fusion Applications certifies software components, they put those components through very rigorous and extensive tests. Additionally, when Fusion Applications adopt a specific release – even a PS release – it makes that release more important to Oracle. So we now know that PS 5 has both been tested to the max and is of strategic importance to Fusion Applications and thereby to Oracle. Adopting PS5 for us mere mortals is therefore a safe bet – safer than some other PS or even major releases may have been.
Oracle states that PS5 is not a major release with lots of new functionality – but still, a lot of interesting stuff was made available, including functionality previously only available in intricate ways (for example Feature Pack for PS4, BPM customers that politely asked support etc.) that is now accessible in an easier way.
So there I was, tracking Twitter, tweeting a little myself and downloading, downloading and more downloading:
Review of Oracle Service Bus 11g Development Cookbook (Packt Publishing) by Edwin Biemond, Guido Schmutz, Eric Elzinga et. al.
2Recently I gained access to an electronic copy of the just released Oracle Service Bus 11g Development Cookbook, written by five authors – all experts on OSB and three personal acquaintances of mine. I was very interested in learning about the final result after hearing many intermediate comments during the writing process as well as reading the occasional remark on Twitter. Knowing Guido, Eric and Edwin and assuming the same expert level for the other two authors, I anticipated a very interesting read.
Below I will share my impressions from browsing through this solid 500+ page volume. Note: the homepage for the book can be found here: http://www.packtpub.com/oracle-service-bus-11g-development-cookbook/book .
Intercepting user customization – such as column reordering in tables – in ADF 11g change persistence
0The requirement I was facing was simple: act on column reordering through user drag and drop in a rich table. More specifically: invoke a method in a managed bean whenever the user changes the position (or side or visibility) of a column.
At first it seemed trivial – just use an AttributeChangeListener. When that turned out not to work – this listener does not get triggered for column reordering – the challenge turned almost unsurmountable. Finally I ran into the ADF Change Persistence framework and more specifically into the concept of a ChangeManager. See for some background this article that I wrote a long time ago: http://technology.amis.nl/blog/4595/adf-11g-persisted-run-time-user-ui-personalization-or-impatient-mans-mds. Some background can also be found here: http://docs.oracle.com/cd/E15523_01/web.1111/b31974/ad_persist.htm (Fusion Middleware Fusion Developer’s Guide for Oracle Application Development Framework 11g – 35 Allowing User Customizations at Runtime).
In short: enable user customizations and configure a custom class that extends from ChangeManager to intercept the customizations.
Jouw toekomst als Oracle professional – AMIS !!EXTRA!! informatieavond over jouw ontwikkelingspad
0Als je dit leest en je bent Oracle professional – ontwikkelaar of administrator – is de kans groot dat je jouw carriere bent gestart in de jaren ’90, in het tijdperk van Oracle7, Oracle Forms en Client/Server applicaties – net voor de opkomst van Java, internet, mobiel en SOA. Misschien ligt je start daar nog wel voor en misschien ben je van een tikje later. Maar in elk geval: je hebt een solide fundament en al vele jaren ervaring in Oracle technologie.
Nu is het 2012. En de afgelopen jaren is de technologie in hoog tempo ontwikkeld. Web 2.0 applicaties en multi-tier architecturen dienden zich aan en SOA, Service Bus en BPM zijn opgekomen. Java is overal – en HTML 5 staat op het punt om Flash en Silverlight te verdringen, in desktop browsers en in mobiele devices. Eindgebruikers worden mondiger en veel-eisender en real-time, push-enabled, BI-gedreven dashboards en multi-channel takenlijsten worden in snel itererende agile-projecten gerealiseerd.
Oracle 11g Database doet alle simpele DBA taken zelf – en de uitdaging voor de Database Administrator is verschoven naar groter en interessanter, zeker als 24/7 beschikbaarheid, virtualisatie en de cloud als infrastructuur opduiken. Middleware administratie en integrale security zijn zomaar twee nieuwe uitdagingen op de weg van de administrator, naast een verdergaande consolidatie en professionalisering van deployment en monitoring.
De uitdaging voor de Oracle professional lijkt duidelijk: hoe kies je je weg naar de toekomst? Om interessante klussen te blijven (gaan?) doen is het nodig om aansluiting te vinden bij de ontwikkelingen in de markt. Eerst moet je natuurlijk goed inzicht hebben in wat die ontwikkelingen zijn – in de markt in het algemeen en binnen de Oracle technology stack in het bijzonder. Dan moet je uitvinden hoe je vanuit je huidige kennis en ervaring de aansluiting vindt en jezelf prepareert voor het werken met de huidige en komende technologie. En tenslotte moet je het gaan doen – kennis vergaren, ervaring opdoen en je profileren om de passende klussen op te kunnen pakken.
Masterclass Oracle 11g voor Database Ontwikkelaars – haal meer uit SQL en PL/SQL in 11g
0Aanstaande vrijdag 27 januari verzorgt Oracle ACE Director Alex Nuijten bij AMIS Services in Nieuwegein een Masterclass voor Oracle Database Developers: iedereen die met enige regelmaat SQL en/of PL/SQL toepast in zijn of haar werk. In deze Masterclass leidt Alex de deelnemers rond in Oracle Database 11g Release 1 en 2 met als voornaamste doelstelling de bezoekers in staat te stellen nuttig gebruik te gaan maken van de nieuwe mogelijkheden in deze 11g releases ten einde code simpeler, beter, sneller en functioneel rijker te maken.
Alex staat wereldwijd bekend als enthousiaste verteller en duidelijke explicateur (hij heeft met die eigenschappen al meerdere speaker-awards gewonnen op internationale conferenties). Hij combineert een duidelijk overzicht van de theoretische achtergrond met sprekende demonstraties en praktijkvoorbeelden. Deelnemers kunnen idealiter zijn some wat droge gevoel voor humor waarderen – en zijn in staat om in een tamelijk intensieve dag veel nieuwe kennis te verwerken.
Voor deze Masterclass is nog een beperkt aantal plaatsen beschikbaar. Zie http://www.amis.nl/amis-masterclasses/masterclass-oracle-11g-voor-database-developers voor meer informatie en inschrijving.
Create simple Java application to post JSON message to CometD Bayeux Channel using Apache HttpClient and Maven style NetBeans project
0The objective discussed in this article is to post messages to a CometD Bayeux Channel with a standalone Java Class – without dependencies on CometD. For example to control from Java the Slideshow introduced in the synchronized Slideshow demo application created using CometD (see previous articles Push based synchronized Slideshow demo application implemented using CometD and jQuery running on Tomcat and Publishing to CometD Bayeux Channel from inside the Oracle Database – PL/SQL based push to CometD Web Client ).
This article describes the creation of a simple Java Class leveraging Apache HttpClient to post HTTP requests (JSON messages) to a CometD Bayeux Channel. The main point is to show working code with the lest dependencies, not an optimal program (it is far from optimal). The article demonstrates how NetBeans and Maven conspire here to make the task as simple as possible. The Maven support in NetBeans allows me to simply create a new Maven style project of (arche)type Java Application.
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