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Hibernate hidden gem: the pooled-lo optimizer

Introduction In this post we’ll uncover a sequence identifier generator combining identifier assignment efficiency and interoperability with other external systems (concurrently accessing ...
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A JUnit Rule to Run a Test in Its Own Thread

Occasionally it would be helpful to be able to run a JUnit test in a separate thread. In particular when writing integration tests that interact with encapsulated ThreadLocals or the ...
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Drools Executable Model

The Executable Model is a re-design of the Drools lowest level model handled by the engine. In the current series (up to 6.x) the executable model has grown organically over the last ...
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Template Method Pattern Example Using Java Generics

If you find that a lot of your routines are exactly the same except for certain sections, you might want to consider the Template Method to eliminate error-prone code duplication. ...
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Camel on JBoss EAP with Custom Modules

Apache Camel — the best open source integration library Apache Camel is an awesome, open-source, integration library that can be used as the backbone of an ESB, or in stand alone ...
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Grouping, sampling and batching – custom collectors in Java 8

Continuing first article, this time we will write some more useful custom collectors: for grouping by given criteria, sampling input, batching and sliding over with fixed size window. Grouping ...
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Use Cases for Elasticsearch: Flexible Query Cache

In the previous two posts on use cases for Elasticsearch we have seen that Elasticsearch can be used to store even large amounts of documents and that we can access those using the ...
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How to Instantly Improve Your Java Logging With 7 Logback Tweaks

The benchmark tests to help you discover how Logback performs under pressure Logging is essential for server-side applications but it comes at a cost. It’s surprising to see though ...
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Java: Determining the status of data import using kill signals

A few weeks ago I was working on the initial import of ~ 60 million bits of data into Neo4j and we kept running into a problem where the import process just seemed to freeze and nothing ...
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Identifying JVM – trickier than expected

In Plumbr we have spent the last month by building the foundation for future major improvements. One of such building blocks was addition of the unique identifier for JVM in order to ...
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