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Camel: Build a message based application

This is a long article that contains three separate topics:Getting started with Apache Camel with Java Improving startup of routes with a CamelRunner Building message based application ...
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Configure timeout for CDI conversations

CDI conversation scope is a nice feature when developing JSF applications. Imagine you have large data tables which take a long time to be loaded. You normally don’t want to place ...
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Hibernate: save vs persist and saveOrUpdate

What is difference between save and saveOrUpdate or Difference between save and persist ...
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Twitter REST API from Scala and Java using signpost

If you’ve read some other articles on this blog you might know that I like creating visualizations of various datasets. I’ve just started a small project where I want to ...
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Java Hidden code

Sometime ago I came across the issue of invisible characters in Strings. These can really cause confusion because they are invisible. String a = "Hello\u200e"; String b = ...
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Spring 3.1 Caching and @CacheEvict

My last blog demonstrated the application of Spring 3.1’s @Cacheable annotation that’s used to mark methods whose return values will be stored in a cache. However, @Cacheable is ...
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Duck typing in Java ? Well, not exactly

According to Wikipedia duck typing is: style of dynamic typing in which an object’s methods and properties determine the valid semantics, rather than its ...
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Apache Wicket: Remember Me functionality

It is quite common in web applications to have “Remember Me” functionality that allows user to be automatically logged in each time when he visits our website. Such feature can ...
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Building OpenJDK on Windows

Doing some experiments, I found that it often useful to have JDK source code available in hand to make some changes, play with it, etc. So I decided to download and compile that beast. ...
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Java Annotations – Retention

Consider a Java annotation: public @interface AnAnnotaton {} A class with this annotation applied on it: @AnAnnotaton class AnAnnotatedClass{ } And a test which checks if ...
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