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Services, Microservices, Nanoservices – oh my!

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Apparently there’s this new distributed architecture thing called microservices out and about – so last week I went ahead and read Martin Fowler’s & James Lewis’s extensive article on the subject . and my reaction to this was basically:       I guess it is easier to use a new name (Microservices) rather than say that this is what SOA ...

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Oracle Drops Collection Literals in JDK 8

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In a posting on the OpenJDK JEP 186 Oracle’s Brian Goetz informs that Oracle will not be pursuing collection literals as a language feature in JDK8. A collection literal is a syntactic expression form that evaluates to an aggregate type as an array, List or Map. Project Coin proposed collection literals, which also complements the library additions in Java SE8. ...

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Testing Lucene’s index durability after crash or power loss

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One of Lucene’s useful transactional features is index durability which ensures that, once you successfully call IndexWriter.commit, even if the OS or JVM crashes or power is lost, or you kill -KILL your JVM process, after rebooting, the index will be intact (not corrupt) and will reflect the last successful commit before the crash. Of course, this only works if ...

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Attempt to map WCF to Java terms

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By writing this post I’m taking a huge risk of being rejected by both .NET and Java communities. This is an attempt to explain what WCF, which stands for Windows Communication Foundation, is in Java terms. WCF-to-Java mapping is not really trivial. I’m lacking understanding to what extend WFC consumer should be aware about the type of communication with the service: ...

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MongoDB 2.6 is out

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Introduction MongoDB is evolving rapidly. The 2.2 version introduced the aggregation framework as an alternative to the Map-Reduce query model. Generating aggregated reports is a recurrent requirement for enterprise systems and MongoDB shines in this regard. If you’re new to it you might want to check this aggregation framework introduction or the performance tuning and the data modelling guides. Let’s ...

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Yet another way to handle exceptions in JUnit: catch-exception

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There are many ways of handling exceptions in JUnit (3 ways of handling exceptions in JUnit. Which one to choose?, JUnit ExpectedException rule: beyond basics). In this post I will introduce catch-exception library that I was recommended to give a try. In short, catch-exceptions is a library that catches exceptions in a single line of code and makes them available ...

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Java Rocks More Than Ever

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On the TIOBE index, Java and C have been sharing the #1 and #2 rank for a long time now, and with the recent GA release of the JDK 8, things are not going to get any worse for our community. Java simply rocks! And it’s the best platform to build almost any of your applications, out there. But why ...

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15 Must Read Java 8 Tutorials

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Java 8 was released last month and is just chock-full of new features and behind-the-scenes optimizations. The internet has been doing quite a good job covering all these new additions – both the good and the bad. I thought it’d be good to do a round-up of what we think are some of the best tutorials out there, to help ...

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Tracking Exceptions – Part 4 – Spring’s Mail Sender

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If you’ve read any of the previous blogs in this series, you may remember that I’m developing a small but almost industrial strength application that searches log files for exceptions. You may also remember that I now have a class that can contain a whole bunch of results that will need sending to any one whose interested. This will be ...

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Hadoop MapReduce Concepts

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What do you mean by Map-Reduce programming? MapReduce is a programming model designed for processing large volumes of data in parallel by dividing the work into a set of independent tasks. The MapReduce programming model is inspired by functional languages and targets data-intensive computations. The input data format is application-specific, and is specified by the user. The output is a ...

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