KSQL Deep Dive – The Open Source Streaming SQL Engine for Apache Kafka

Posted in Apache Kafka, Big Data, Confluent, Docker, Java / JEE, Kafka Connect, Kafka Streams, KSQL, Microservices, Open Source, Stream Processing on May 15th, 2018 by Kai Wähner

I had a workshop at Kafka Meetup Tel Aviv in May 2018: “KSQL Deep Dive – The Open Source Streaming SQL Engine for Apache Kafka“.

Here are the agenda, slides and video recording.

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Book Review: “Getting Started with NoSQL” by Gaurav Vaish (Packt Publishing)

Posted in Persistence on April 24th, 2013 by Kai Wähner

Getting Started with NoSQL” is a new book by PACKT PUBLISHING. It gives an introduction to different NoSQL concepts and products. Besides, it explains the differences to SQL databases and when to use which one.

First, the book defines NoSQL and explains what it is and what it is not. Especially, the characteristics and differences compared to SQL are described. The next chapter explains most important NoSQL storage types: Column-oriented databases, document stores, key-value stores, and graph databases. Advantages and disadvantages of these concepts are explained in detail, before comparing most important NoSQL products such as Cassandra, Neo4j, MongoDB or Redis. A case study (which uses MongoDB) concludes the book to show how an implementation with a NoSQL database is different from using a relational database.

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Rapid Cloud Development with Spring Roo – Part 1: Google App Engine (GAE)

Posted in Cloud, Java / JEE on July 18th, 2011 by Kai Wähner

Spring Roo is a tool to offer rapid application development on the Java platform. I already explained when to use it: http://www.kai-waehner.de/blog/2011/04/05/when-to-use-spring-roo.  Spring Roo supports two solutions for Cloud Computing at the moment: Google App Engine (GAE) and VMware Cloud Foundry. Both provide the Platform as a Service (PaaS) concept. This article will discuss the GAE support of Spring Roo. Cloud Foundry will be analyzed in part 2 of this article series.

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MyBatis (formerly called iBatis) – Examples and Hints using @SELECT, @INSERT and @UPDATE Annotations

Posted in Java / JEE, Persistence on October 25th, 2010 by Kai Wähner

MyBatis (formerly called iBatis) – Examples and Hints using SELECT, INSERT and UPDATE Annotations

MyBatis (http://www.mybatis.org/) is a lightweight persistence framework for Java and .NET. This blog entry addresses the Java side. MyBatis is an alternative positioned somewhere between plain JDBC and ORM frameworks (e.g. EclipseLink or Hibernate). MyBatis usually uses XML, but it also supports annotations since version 3.

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