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Elasticsearch Tutorial for Java Developers

Course Overview Elasticsearch is a search engine based on Lucene. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License. Elasticsearch is the most popular enterprise search engine followed by Apache Solr, also based on ...

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Oracle JDK 9 Early Access Documentation Updated

Raymond Gallardo‘s 4 April 2017 post Early Access documentation for Oracle JDK 9 has been updated today announces updates to the Oracle JDK9 Documentation Early Access page. Gallardo highlights a few of the updated sections including What’s New in Oracle JDK 9, Oracle JDK 9 Migration Guide, HotSpot Virtual Machine Garbage Collection Tuning Guide (including Garbage-First Garbage Collector Tuning), javapackager ...

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Creating A Custom Amazon Alexa Skill

With the explosion of internet of things (IoT), many companies are competing to create the best smart home ecosystem for consumers. Such big players include Samsung, Apple, Amazon, Insteon, Wink, Phillips, etc. Each offers a unique experience and claims to be the best in the business. In this blog we will discuss the Amazon Echo and its Alexa application. We will go ...

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Implications of the Presence of StringBuffer

When I am working on legacy code and run across instances of StringBuffer, I typically replace them with instances of StringBuilder. Although a performance advantage can be gained from this change, I often change it in places I know will have little noticeable effect in terms of performance. I feel it’s worth making the change for a variety of reasons ...

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Docker Remote API on Windows and OSX

There are multiple ways to monitor Docker containers. Docker CLI provides the docker container stats API that gives basic information about the running containers. Docker Remote API provides more detailed information about the containers. Staring with Docker 1.13, there is an experimental feature with a Prometheus endpoint cAdvisor is an open source tool that provides last container usage and performance characteristics. This data can be ...

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Java RAM Usage in Containers: Top 5 Tips Not to Lose Your Memory

java-interview-questions-answers

In this article, we would like to share specifics of Java memory management and elasticity inside containers that are not evident at the first sight. Below you’ll find a list of the issues to be aware of and important updates in the upcoming JDK releases, as well as existing workarounds for the core pain points. We collected the top 5 ...

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Team Size Matters, Reprise

Several years ago, I wrote a post for a different blog called “Why Team Size Matters.” That post is long gone. I explained that the number of communication paths in the team does not increase linearly as the team size increases;  team communication paths square when the team increases linearly. Here is the calculation where N is the number of people on ...

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What does a CTO do?

The last few years have been good to me, I’ve enjoyed giving advice to teams and companies and helping people get started with better ways of working, ways of working which usually go by the name of “agile” but the name is the least important thing. But… I’ve been questioning if I want to keep doing this. Like most of ...

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