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Chronicle and the Micro-Cloud

Overview A common question I face is; how do you scale a Chronicle based system if it is single writer, multiple readers. While there are solutions to this problem, it is far more likely ...
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ListenableFuture in Guava

ListenableFuture in Guava is an attempt to define consistent API for Future objects to register completion callbacks. With the ability to add callback when Future completes, we can ...
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Spring Data, MongoDB and JSF Integration tutorial

Introduction to sample application (MongoShop Product Catalog) After this tutorial, a sample application (MongoShop Product Catalog) with the following functional requirement will be ...
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Tweeting StackExchange with Spring Social – part 1

This article will cover a quick side-project – a bot to automatically tweet Top Questions from the various Q&A StackExchange sites, such as StackOverflow, ServerFault, SuperUser, ...
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Spring meets Apache Hadoop

SpringSource has just announced the first GA release of Spring for Apache Hadoop. The goal of this project is to simplify the development of Hadoop based applications. You may download ...
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Prime-UI, JAX-RS with Jersey and Gson on Oracle Cloud

The Oracle Cloud is around everywhere these days. It had a rough start with Larry denying the need for a cloud for a very (too) long time and some very early announcements and a very ...
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Your logs are your data: logstash + elasticsearch

Topic of today’s post stays a bit aside from day-to-day coding and development but nonetheless covers a very important subject: our application log files. Our apps do generate ...
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ActiveMQ Clustering, Durable Subscribers, and Virtual Topics to the rescue

So you want to do publish-subscribe with ActiveMQ across distributed topics and be reliable. You can just use durable subscriptions, right? Well, you could, but if you’re using clustering ...
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Implementing custom Future

Last time we learned the principles behind java.util.concurrent.Future<T>. We also discovered that Future<T> is typically returned by libraries or frameworks. But there ...
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java.util.concurrent.Future basics

Hereby I am starting a series of articles about future concept in programming languages (also known as promises or delays) with a working title: Back to the Future. Futures are very ...
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