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Spring Cloud Data Flow With Apache Spark 1. Introduction Spring Cloud Data Flow is a toolkit for building data integration and real-time data processing pipelines. Pipelines, in this case, are Spring Boot applications that are built with the use of Spring Cloud Stream or Spring Cloud Task frameworks. In this tutorial,… Continue Reading spring-cloud-data-flow-spark
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Java Optional as Return Type 1. Introduction The Optional type was introduced in Java 8. It provides a clear and explicit way to convey the message that there may not be a value, without using null. When getting an Optional return type, we’re likely to check if the value is… Continue Reading java-optional-return
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Google AutoService 1. Introduction In this quick tutorial, we’ll briefly explain Google’s AutoService. This is an annotation processor library that helps us with generating Java Service Provider Interface (SPI) configuration files. 2. Java SPI Simply put, we can leverage Java SPI to develop extensible applications, as it provides fast, safe,… Continue Reading google-autoservice
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OCP Certification – Advanced Java Class Design Java [[OCP Java]] === 1. Overview In this tutorial, we’ll discuss the advanced Java class design objective of the OCP certification. [[Java certification]] === 2. OCP Java Certification The OCP certification is an upgrade on the OCA certification but follows the same format… Continue Reading java-ocp-advanced-class-design
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Installing Java on Ubuntu 1. Overview In this tutorial, we’ll introduce different methods for installing a JDK on Ubuntu. Then, we’ll briefly compare the methods. Finally, we’ll show how to manage multiple Java installations on an Ubuntu system. As a prerequisite to each method, we need an Ubuntu system to… Continue Reading ubuntu-install-jdk
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Multi-Module Maven Application with Java Modules 1. Overview The Java Platform Module System (JPMS) adds more reliability, better separation of concerns, and stronger encapsulation to Java applications. However, it’s not a build tool, hence it lacks the ability for automatically managing project dependencies. Of course, we may wonder whether if… Continue Reading maven-multi-module-project-java-jpms
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Permgen vs Metaspace in Java 1. Introduction In this quick tutorial, we’re going to examine the differences between the PermGen and Metaspace memory regions in the Java environment. It’s important to keep in mind that, starting with Java 8, the Metaspace replaces the PermGen – bringing some substantial changes. 2. PermGen… Continue Reading java-permgen-metaspace
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Hashing a Password in Java 1. Overview In this tutorial, we’ll be discussing the importance of password hashing. We’ll take a quick look at what it is, why it’s important, and some secure and insecure ways of doing it in Java. 2. What’s Hashing? Hashing is the process of generating… Continue Reading java-password-hashing
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Intro to Google Cloud Storage with Java 1. Overview Google Cloud Storage offers online storage tailored to an individual application’s needs based on location, the frequency of access, and cost. Unlike Amazon Web Services, Google Cloud Storage uses a single API for high, medium, and low-frequency access. Like most cloud… Continue Reading java-google-cloud-storage
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Using Java MappedByteBuffer 1. Overview In this quick article, we’ll be looking at the MappedByteBuffer in the java.nio package. This utility can be quite useful for efficient file reads. 2. How MappedByteBuffer Works When we’re loading a region of the file, we can load it to the particular memory region… Continue Reading java-mapped-byte-buffer
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