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How to Make a Deep Copy of an Object in Java 1. Introduction When we want to copy an object in Java, there’re two possibilities that we need to consider — a shallow copy and a deep copy. The shallow copy is the approach when we only copy field values… Continue Reading java-deep-copy
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Running Setup Data on Startup in Spring 1. Introduction In this article we’ll focus on how to run logic at the startup of a Spring application. Further reading: Configure a Spring Boot Web Application Some of the more useful configs for a Spring Boot application. Read more → Spring Boot:… Continue Reading running-setup-logic-on-startup-in-spring
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Spring Data Reactive Repositories with MongoDB 1. Introduction In this tutorial, we’re going to see how to configure and implement database operations using Reactive Programming through Spring Data Reactive Repositories with MongoDB. We’ll go over the basic usages of ReactiveCrudRepository, ReactiveMongoRepository, as well as ReactiveMongoTemplate. Even though these implementations use reactive… Continue Reading spring-data-mongodb-reactive
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Using InfluxDB with Java 1. Overview InfluxDB is a high-performance store for time-series data. It supports insertion and real-time querying of data via a SQL-like query language. In this introductory article, we’ll demonstrate how to connect to an InfluxDb server, create a database, write time-series information, and then query the… Continue Reading java-influxdb
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Define Custom RAML Properties Using Annotations REST RAML 1. Introduction In this, the fourth article in our series on RAML – the RESTful API Modeling Language – we demonstrate how to use annotations to define custom properties for a RAML API specification. This process is also referred to as extending… Continue Reading raml-custom-properties-with-annotations
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Understanding the NumberFormatException in Java 1. Introduction Java throws NumberFormatException – an unchecked exception – when it cannot convert a String to a number type. Since it’s unchecked, Java does not force us to handle or declare it. In this quick tutorial, we’ll describe and demonstrate what causes NumberFormatException in Java… Continue Reading java-number-format-exception
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Locality-Sensitive Hashing in Java Using Java-LSH Algorithms Java 1. Overview The Locality-Sensitive Hashing (LSH) algorithm hashes input items so that similar items have a high probability of being mapped to the same buckets. In this quick article, we will use the java-lsh library to demonstrate a simple use case of… Continue Reading locality-sensitive-hashing
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REST Query Language with RSQL 1. Overview In this fifth article of the series we’ll illustrate building the REST API Query language with the help of a cool library – rsql-parser. RSQL is a super-set of the Feed Item Query Language (FIQL) – a clean and simple filter syntax for… Continue Reading rest-api-search-language-rsql-fiql
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Kotlin with Ktor 1. Overview Ktor is a framework for building asynchronous servers and clients in connected systems using the powerful Kotlin programming language. It facilitates developing a standalone application with embedded servers. In this tutorial, we’re going to explore how to create a standalone server application using Ktor. 2.… Continue Reading kotlin-ktor
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Guava – Maps 1. Overview In this tutorial we’ll illustrate the most useful ways you can leverage Guava to work with Java Maps. Let’s start very simple and create a HashMap without the new operator, using Guava: Map<String, String> aNewMap = Maps.newHashMap(); 2. ImmutableMap Next – let’s see how to… Continue Reading guava-maps
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