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HAPROXY up and running in couple of minutes

I tried HAPROXY for my WEBAPP (Hosted on tomcat) -reason for using HAPROXY is that it also supports WEBSOCKETS and my current project uses websockets for server push. As first step, ...
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Multiple Inheritance in Java and Composition vs Inheritance

Sometime back I wrote few posts about inheritance, interface and composition in java. In this post, we will look into multiple inheritance and then learn about benefits of composition ...
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neo4j/cypher: Getting the hang of query parameters

For as long as I’ve been using neo4j‘s cypher query language Michael has been telling me to use parameters in my queries but the performance of the queries was always acceptable ...
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Graph Processing: Betweeness Centrality – neo4j’s cypher vs graphstream

Last week I wrote about the betweenness centrality algorithm and my attempts to understand it using graphstream and while reading the source I realised that I might be able to put something ...
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Android HTTP Client : Network error and ConnectivityManager

In this post I will show how to handle connection errors or the situation when the connection changes (i.e from UMTS to WI-FI). In all these cases we have to gracefully handle these ...
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Unit Testing of Spring MVC Controllers: REST API

Spring MVC provides an easy way to create REST APIs. However, writing comprehensive and fast unit tests for these APIs has been troublesome. The release of the Spring MVC Test framework ...
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Mediator Design Pattern in Java – Example Tutorial

Mediator Pattern is one of the behavioral design pattern, so it deals with the behaviors of objects. Mediator design pattern is used to provide a centralized communication medium between ...
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Memento Design Pattern in Java – Example Tutorial

Memento pattern is one of the behavioral design pattern. Memento design pattern is used when we want to save the state of an object so that we can restore later on. Memento pattern ...
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Neo4j Java REST Binding – Part 2 (Batching)

In Part 1, we talked about setting up a connection to the Neo4j Server using the Java REST Binding. Let’s now go into some details about transactions, batching, and what the REST ...
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Asynchronous retry pattern

When you have a piece of code that often fails and must be retried, this Java 7/8 library provides rich and unobtrusive API with fast and scalable solution to this problem:                   ScheduledExecutorService ...
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