Jonathan Tan

Jon is a professional software engineer currently working in financial trading systems. He has worked in a wide variety of projects that includes mobile games, 3D visualization, artificial intelligence, banking and trading systems. He loves to teach people and expresses his passion through blogging.

Groovy
Jonathan TanFebruary 2nd, 2015
2 722
Grails Tutorial for Beginners – Criteria API
This tutorial will show how to use Criteria API to search data from the database. Criteria is a powerful API…
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Groovy
Jonathan TanJanuary 28th, 2015
0 1,423
Grails Tutorial for Beginners – HQL Queries (executeQuery and executeUpdate)
This Grails tutorial will teach the basics of using HQL. Grails supports dynamic finders which makes it convenient to perform…
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Groovy
Jonathan TanJanuary 20th, 2015
0 271
Grails chained select – load data on one dropdown box depending on another
This tutorial will show how to create two select boxes where the second select box’s items are affected by the…
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Groovy
Jonathan TanJanuary 20th, 2015
0 141
Grails render images on the fly in GSP
This tutorial will show how to generate PNG images on the fly and display inside a GSP. This can serve…
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Groovy
Jonathan TanDecember 29th, 2014
0 58
Grails Tutorial for Beginners – Grails Service Layer
This tutorial will discuss the importance of the service layer in Grails and how to work with it. It also…
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Groovy
Jonathan TanDecember 23rd, 2014
0 61
Grails Tutorial for Beginners – Grails Service Layer
This tutorial will discuss the importance of the service layer in Grails and how to work with it. It also…
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Groovy
Jonathan TanDecember 3rd, 2014
0 70
Grails Spring Security Core Plugin – Registering Callback Closures
I was searching for a way to hook business logic after successful user login while using Spring Security Core plugin.…
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Thank you!