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Google Guava Concurrency – ListenableFuture

In my last post I covered using the Monitor class from the com.google.common.util.concurrent package in the Guava Library. In this post I am going to continue my coverage of Guava concurrency ...
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Permissions in OSGi

In a previous post, we looked at implementing a sandbox for Java applications in which we can securely run mobile code. This post looks at how to do the same in an OSGi environment.OSGi The ...
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Using Jasper Reports to create reports in Java

Last week I was trying to create a report using Jasper. In this post I will document some of the resources and links so that it will be useful for any one looking for similar information. I ...
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Parallelization of a simple use case explained

Some time ago a friend of mine asked me about the possibilities of speeding up the following process: they are generating some data in two stages, reading from a database and processing ...
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MyBatis Tutorial – CRUD Operations and Mapping Relationships – Part 2

To illustrate we are considering the following sample domain model: There will be Users and each User may have a Blog and each Blog can contain zero or more posts. The Database structure ...
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Scaling Scala vs Java

In my previous post I showed how it makes no sense to benchmark Scala against Java, and concluded by saying that when it comes to performance, the question you should be asking is ‘How ...
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Google Guava – Synchronization with Monitor

The Google Guava project is a collection of libraries that every Java developer should become familiar with. The Guava libraries cover I/O, collections, string manipulation, and concurrency ...
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Java Intrinsics and Performance

The original question was How to count the number of 1′s a number will have in binary? I included a performance comparison of using Integer.bitCount() which can be turned into ...
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Non-blocking I/O – discovering Akka

Here comes the time to follow some good practices when implementing actors. One of the most important rules we should follow is avoiding any blocking input/output operations, polling, ...
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Two actors – discovering Akka

Hope you are having fun so far, but our application has serious performance defect. After measuring response times of the RandomOrgRandom class we developed in the previous part we ...
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