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java-interview-questions-answers

Be Careful With Cache Managers

If you are using spring and JPA, it is very likely that you utilize ehcache (or another cache provider). And you do that in two separate scenarios: JPA 2nd level cache and spring method ...
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Couchbase 101: Create views (MapReduce) from your Java application

When you are developing a new applications with Couchbase 2.0, you sometimes need to create view dynamically from your code. For example you may need this when you are installing your ...
java-interview-questions-answers

Apache Apollo REST API

Apache Apollo is a next-generation, high-performance, multi-protocol messaging broker built from the ground up to one day be a drop-in replacement of ActiveMQ 5.x. I have blogged about ...
json-logo

Json deserialization with Jackson and Super type tokens

Datatables is a jquery plugin to present tabular information – it can enhance a simple table or can use a AJAX based data and present the information in a tabular form. Datatables ...
akka-logo

Adding Turbochargers to JEE Apps

One of the key roles, I play is evangelizing Akka within my local community. As part of the discussions, the question/doubt usually in people’s mind is how can Akka provide better ...
jsf-logo

GET / POST with RESTful Client API

There are many stuff in the internet how to work with RESTful Client API. These are basics. But even though the subject seems to be trivial, there are hurdles, especially for beginners. In ...
java-interview-questions-answers

Java Thread: retained memory analysis

This article will provide you with a tutorial allowing you to determine how much and where Java heap space is retained from your active application Java threads. A true case study from ...
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Easier Multi-Field Validation with JSF 2.0

One of the most frequent needs when developing application forms is multi-field validation (or cross-field, but I’m not using this term because when I put it on Google I actually ...
java-interview-questions-answers

Waiting for the right moment – in integration testing

When you have to test multi-threaded programs, there is always the need to wait until the system arrives at a particular state, at which point the test can verify that the proper state ...
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Lucene – Quickly add Index and Search Capability

What is Lucene? Apache LuceneTM is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that ...
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