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Using ROWNUM with ORDER BY in Oracle SQL
Lot of times you have tried to use ROWNUM clause along along with the ORDER BY clause and must have been treated with a different output than you expected. You would expect the ROWNUM to be applied...
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Using JAXB to generate Java Objects from XML document
Quite sometime back I had written about Using JAXB to generate XML from the Java, XSD. And now I am writing how to do the reverse of it i.e generating Java objects from the XML document. There was one...
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Using BULK COLLECT INTO construct in Oracle PLSQL
At times when you are programming in PLSQL you would want to fetch multiple records into an ARRAY or some collection. One approach to do is to loop through the result of the SQL query and then keep...
View ArticleCreating External DSLs using ANTLR and Java
In my previous post sometime back I had written about creating Internal DSLs in Java. In the book Domain Specific Languages by Martin Fowler, he discusses about another type of DSL called External DSLs...
View ArticleDSL based approach to input Graph data in graph theory based java programs
Most of us have coded some programs which deal with graph theory algorithms like finding the shortest path between two vertices, finding the minimum spanning tree for a given graph and so on. In each...
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HTML5 Geolocation API with Goolge Maps
I have been reading Head First HTML5 and read about the Geolocation support in HTML5 and also went through the example they have shared about using the Google Maps with HTML5 geolocation API. It was an...
View ArticleA brief introduction to using Option and Either classes
Previously I had written about Companion classes in Scala and there in I had mentioned one of its uses i.e defining the apply method to support object literals. In this post I am continuing from where...
View ArticleDeep dive into Optional class API in Java 8
We all as Java programmers been through the situation where in we invoke a method to get some value and then instead of directly invoking some methods on the return value, we first have to check that...
View ArticleDouble Brace Initialization Idiom and its drawbacks
This post is inspired by the Double Brace Initialization concept explained here. This technique can be used for creating and initializing objects and represent these operations in a single expression....
View ArticleJSON Processing support in JavaEE 7 and JSR-353
Warning: preg_replace() [function.preg-replace]: Unknown modifier 't' in /home/sanaulla/public_html/blog/wp-content/plugins/jetpack/class.photon.php on line 288 Warning: preg_replace()...
View ArticleGetting started with Mocking in Java using Mockito
We all write unit tests but the challenge we face at times is that the unit under test might be dependent on other components. And configuring other components for unit testing is definitely an...
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Simple Aspect Oriented Programming (AOP) using CDI in JavaEE
We write service APIs which cater to certain business logic. There are few cross-cutting concerns that cover all service APIs like Security, Logging, Auditing, Measuring Latencies and so on. This is a...
View ArticleVery useful Console Window for windows
ConEmu (http://www.fosshub.com/ConEmu.html) is a very useful and much much better Console window for Windows. It acts as a facade over the cmd.exe. There are loads of good things in it and highly...
View ArticleUsing Google Guava Cache for local caching
Lot of times we would have to fetch the data from a database or another webservice or load it from file system. In cases where it involves a network call there would be inherent network latencies,...
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Getting rid of Getters and Setters in your POJO
We all have read in Java books about encapsulation of fields in Java class and also when ever you code you are asked to take special care in encapsulating the fields and providing explicit Getters and...
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Setting up sharded mongodb cluster in localhost
I have been playing around with MongoDb, thanks to the M101J Course offered by Mongodb University. These NoSQL datastores are gaining popularity due to a number of reasons and one among them being the...
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WebUI Popover – Useful wrapper over Bootstrap Popover
Github Project page: WebUI Popover. Some of the examples: To create a closeable popover: $("#popover-elem").webuiPopover({ content: "Closeable content", title: "Closeable", closeable:true }); To create...
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Using ROWNUM to paginate the data in Oracle
In one of my previous posts, I showed you how to use ROWNUM with ORDER BY clause. Building on that in this post I will show you how you can paginate your results using ROWNUM in Oracle DB and how you...
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