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Lessons learned: ActiveMQ, Apache Camel and connection pooling

Every once in a while, I run into an interesting problem related to connections and pooling with ActiveMQ, and today I’d like to discuss something that is not always very clear and ...
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Allocating memory for the JVM: a case study

This post is about a recent performance tuning exercise. As always, these start with vague statements about symptoms. This time the devil took the form of “The application is slow ...
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Synthetic and bridge methods

If you have ever played with reflection and executed getDeclaredMethods() you may have been surprised. You may get methods that are not present in the source code. Or, perhaps, you ...
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Common gotchas in Java

Overview Java is a minimalist language with deliberately less features than other languages, never the less it has edge cases which strange effects, and even some common cases with ...
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Functional Programming with Java 8 Lambda Expressions – Monads

What is a monad?: A monad is a design pattern concept used in mostly functional programming languages like lisp or in the modern world clojure or scala. (I would in fact copy a few ...
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Developing Java EE applications with Maven and WebLogic 12c

The WebLogic Server 12c has very nice support for Maven now. The doc for this is kinda hidden though, so here is a direct link http://docs.oracle.com/middleware/1212/core/MAVEN To summarize ...
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Detecting (write) failures when using memory mapped files in Java

Memory mapped files are a good and often overlooked tool. I won’t go into the details here on how they work (use the force Google Luke!), but I will  quickly summarize their advantages:lazy ...
spring-interview-questions-answers

Thymeleaf integration with Spring (Part 2)

1. Introduction This is the second part of the Thymeleaf integration with Spring tutorial. You can read the first part here, where you will learn how to configure this project. As explained ...
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Building Java Web Application Using Hibernate With Spring

This post will show how to create a Student Enrollment Application using MYSQL DB with Hibernate ORM in a Spring environment. This is a simple application that aims to collect the input ...
java-interview-questions-answers

Java Enterprise Software Versus What it Should Be

A lot of developers end up in the Java “enterprise” world at some point in their careers. I know the term alone conjures up all kinds of reactions, and rightly so. Often environments ...
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