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Cloud Foundry Application manifest using Kotlin DSL

I had a blast working with and getting my head around the excellent support for creating DSL’s in Kotlin Language. This feature is now being used for creating gradle build files, for defining routes in Spring Webflux, for creating html templates using kotlinx.html library. Here I am going to demonstrate creating a kotlin based DSL to represent a Cloud Foundry Application Manifest content. A sample ...

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Java Bean Validation Basics

This post summarizes some quick and easy examples for the most common things you would want to do with the Java Beans Validation API (JSR 349, JSR 303). Remember, Beans Validation is independent of Java EE. Although it is built in as part of a Java EE compliant server, the API can also be used just as easily in a ...

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Software Architectural Decision Making

A common question I get asked is “How do I make architectural decisions?” and my standard answer is “it depends”. While it’s a tongue in cheek answer, there is a bit of truth to it. While there are frameworks and methodologies to try and reign this problem in, the reality is that the practice of “software architecture” is inherently a ...

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Creating Milestones with Iteration-Based Agile

I’ve been coaching several teams with a problem: they like to work in iterations. And, they have milestones that are not on a milestone boundary. What should they do? (I suggested flow and you should have heard their response. Well, maybe not.) Here’s why people want these milestones: The team can’t deliver (for whatever reason) as continuous delivery. The PO (or someone ...

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The Patterns of the Antipatterns: Architecture

We have been always looking for the best ways to architect our applications and platforms so they are maintainable, extensible, observable, adaptable and easy to evolve (this is by no means a complete list of the properties we would like to have but the foundational ones). Layered architecture, component-based architecture, hexagonal architecture, microservice architecture (and many others) advocate to use ...

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Docker Monitoring: 5 Methods for Monitoring Java Applications in Docker

What are some of the most useful methods to monitor Java applications in Docker containers? Running applications in containers is an increasingly popular way of maintaining large, distributed stacks that change based on demand. The Java VM heritage makes it an ideal language for container-based infrastructures. With many moving parts and components, monitoring Java applications in containers requires planning and ...

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Java Command-Line Interfaces (Part 7): JCommander

This is the seventh post in my series that briefly introduces various libraries for processing command-line arguments in Java. This post returns to coverage of an annotation-based library that seems to be one of the better known and more popular of the numerous available libraries for processing command line arguments from Java: JCommander. JCommander‘s web page states, “Because life is ...

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Java Command-Line Interfaces (Part 6): JOpt Simple

The main web page for JOpt Simple calls this Java-based library “a Java library for parsing command line options, such as those you might pass to an invocation of javac,” that “attempts to honor the command line option syntaxes of POSIX getopt() and GNU getopt_long().” This is the sixth post of my series of command-line arguments processing in Java and ...

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Apache Ignite with Spring Data

java-interview-questions-answers

Spring Data provides a unified and easy way to access the different kinds of persistence store, both relational database systems, and NoSQL data stores. It is on top of JPA, adding another layer of abstraction and defining a standard-based design to support persistence Layer in a Spring context.                 Apache Ignite IgniteRepository implements Spring Data ...

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