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Setting up sharded mongodb cluster in localhost

I have been playing around with MongoDb, thanks to the M101J Course offered by Mongodb University. These NoSQL datastores are gaining popularity due to a number of reasons and one among ...
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Using Google Guava Cache for local caching

Lot of times we would have to fetch the data from a database or another webservice or load it from file system. In cases where it involves a network call there would be inherent network ...
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Simple Aspect Oriented Programming (AOP) using CDI in JavaEE

We write service APIs which cater to certain business logic. There are few cross-cutting concerns that cover all service APIs like Security, Logging, Auditing, Measuring Latencies and ...
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Parameterized Test Runner in JUnit

We all have written unit tests where in a single test tests for different possible input-output combinations. Lets look how its done by taking a simple fibonacci series example. The ...
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Getting started with Mocking in Java using Mockito

We all write unit tests but the challenge we face at times is that the unit under test might be dependent on other components. And configuring other components for unit testing is definitely ...
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Deep dive into Optional class API in Java 8

We all as Java programmers been through the situation where in we invoke a method to get some value and then instead of directly invoking some methods on the return value, we first ...
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DSL based approach to input Graph data in graph theory based java programs

Most of us have coded some programs which deal with graph theory algorithms like finding the shortest path between two vertices, finding the minimum spanning tree for a given graph ...
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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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Strategy Pattern using Lambda Expressions in Java 8

Strategy Pattern is one of the patterns from the Design Patterns : Elements of Reusable Object book. The intent of the strategy pattern as stated in the book is: Define a family of ...
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Creating Internal DSLs in Java, Java 8- Adopting Martin Fowler’s approach

Currently I am reading this wonderful book on DSLs- Domain Specific Languages by Martin Fowler. The buzz around the DSLs, around the languages which support creation of DSLs with ease, ...
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