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Java 8 Friday: Better Exceptions

At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every ...
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ElasticSearch-Hadoop: Indexing product views count and customer top search query from Hadoop to ElasticSearch

This post covers to use ElasticSearch-Hadoop to read data from Hadoop system and index that in ElasticSearch. The functionality it covers is to index product views count and top search ...
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Why use SerialVersionUID inside Serializable class in Java

Serialization and SerialVersionUID is always remains a puzzle for many Java developers. I often see questions like what is this SerialVersionUID, or what will happen if I don’t ...
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See Your Solr Cache Sizes: Eclipse Memory Analyzer

Solr uses different caches to prevent too much IO access and calculations during requests. When indexing doesn’t happen too frequently you can get huge performance gains by employing ...
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Integration Tests for External Services

Our systems often depend on 3rd party services (They may even be services internal to the company that we have no control on). Such services include Social Networks exposing APIs, SaaS ...
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Writing Clean Tests – Beware of Magic

It is pretty hard to figure out a good definition for clean code because everyone of us has our own definition for the word clean. However, there is one definition which seems to be ...
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Hive: Query customer top search query and product views count using Apache Hive

This post covers to use Apache Hive to query the search clicks data stored under Hadoop. We will take examples to generate customer top search query and statistics on total product ...
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Flume: Gathering customer product search clicks data using Apache Flume

This post covers to use Apache flume to gather customer product search clicks and store the information using hadoop and elasticsearch sinks. The data may consist of different product ...
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Java Singleton Design Pattern

Its one of the simplest design pattern in Java. If any one asks me which design pattern you are good then I would proudly say Singleton. But when they ask in depth concept of singleton ...
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Declarative Linking in Jersey 2.9 and up

A couple of weeks ago A couple of months ago I was looking how I was going to engineers new REST API for an Oracle Cloud project. Once of the things I had planned to do was to use ...
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