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Vacatures bij AMIS services

ADF Faces: Handle task in background process and show real time progress indicator for asynchronous job using Server Push in ADF

6
1 year ago
by Lucas Jellema in , , ,

Recently I received an email from Peru. An ADF developer from Peru was facing a challenge with ADF. In short: ‘the upload of a (large) file should be followed by a potentially long running job. Ideally, the browser would not freeze while the uploaded file is processed and on top of that it would be great to report the progress of the job to the user’.

I like this kind of challenge, especially since I consider both asynchronous processing and server push two of my areas of interest. So I took on the challenge and tried a quickly put together an application that demonstrates this behavior.

This article discusses how I used standard Java concurrency functionality to take the job off line (in a scheduled, background job) and how I leveraged Active Data Service in ADF Faces to have the background job report its progress through an active bean and server push to the browser.

After the user kicks off the job by pushing a button:

the user will be in control again (synchronous but background parrtial request completes) and and will also be informed on the job’s progress through the server push:

In this example, the job progress in steps of 10% that take between 2 and 4 seconds. As soon More >

Vacatures bij AMIS services

Xenogenetics for PL/SQL: Infusing with Java Best Practices and Design Patterns (presentation at OOW 2010)

0
2 years ago
by Lucas Jellema in , , ,

Xenogenetics for PL/SQL: Infusing with Java Best Practices and Design Patterns – Alex Nuijten and Lucas Jellema

PL/SQL is a venerable programming language that is both vital and very much alive. This session will discuss how we further rejuvenate and enhance the way we create PL/SQL programs. We’ll tap into the world of .NET, Java, and other modern programming language to do some cherry picking: what are the very best practices, concepts, and design patterns and how can we apply them to PL/SQL? We’ll explain and demonstrate dependency injection, the observer pattern based on listeners, aspect-oriented programming (AOP), the decorator and template pattern, use of user-defined nested types, and collections.

PL/SQL is a venerable programming language that is both vital and very much alive. This session will discuss how we further rejuvenate and enhance the way we create PL/SQL programs. We’ll tap into the world of .NET, Java, and other modern programming language to do some cherry picking: what are the very best practices, concepts, and design patterns and how can we apply them to PL/SQL? We’ll explain and demonstrate dependency injection, the observer pattern based on listeners, More >

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