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Managing congested actors in Akka

There comes a time in an Akka application when an actor can longer handle increasing load. Since each actor can only handle one message at a time and it keeps a backlog of pending messages ...
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Creating External DSLs using ANTLR and Java

In my previous post quite sometime back I had written about Internal DSLs using Java. In the book Domain Specific Languages by Martin Fowler, he discusses about another type of DSL ...
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How to implement Document Versioning with Couchbase

Introduction Developers are often asking me how to “version” documents with Couchbase 2.0. The short answer is: the clients and server do not expose such feature, but it ...
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Agile Development leads to Alzheimer’s

Iterative development and design helps you to reach your way towards understanding what the customer really needs, to try out new ideas, evaluate designs, experiment, respond to feedback ...
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We Should Not Make (or Enforce) Decisions We Cannot Justify

Software development is a strange industry. New technologies emerge in a fast pace and old technologies become obsolete. The ability to learn new technologies is considered as a sign ...
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Why Write Requirements

There is a lot of advice out there for how to write requirements. There is not as much discussion about why to write requirements. Spend some time thinking about why you write requirements ...
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Android Actionbar Drop Down navigation

ActionBar supports different navigation types within activities. We saw in an older post that we can use Tabs to navigate or we can use Drop Down Navigation. In this post we will ...
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Getting Started With Spring’s MVC Test Framework – Part 2

The first blog in this mini-series introduced the Spring MVC Test Framework and demonstrated its use in unit testing Spring MVC Controller classes as controllers rather then as POJOs. ...
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JPA 2 | Fetch Joins and whether we should use them

Introduction Recently I have been working with FETCH JOINS in JPA 2 to fetch the data eagerly from the Database and I learned quite a lot on why we should avoid using Fetch Joins in ...
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Java Garbage Collection Distilled

Serial, Parallel, Concurrent, CMS, G1, Young Gen, New Gen, Old Gen, Perm Gen, Eden, Tenured, Survivor Spaces, Safepoints, and the hundreds of JVM startup flags. Does this all baffle ...
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