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OOP Concepts for Beginners: What Is Polymorphism By Thorben Janssen The word polymorphism is used in various contexts and describes situations in which something occurs in several different forms. In computer science, it describes the concept that objects of different types can be accessed through the same interface. Each type can provide its own, independent implementation of this interface. It is one of the core concepts of object-oriented programming (OOP). If you're wondering if an object is polymorphic, you can perform a simple test. If the object successfully passes multiple is-a or instanceof tests, it's polymorphic. As I've described in my post about inheritance, all Java classes extend the class Object. Due to this, all objects in Java are polymorphic because they pass at least two instanceof checks. Different types of polymorphism Java supports two types of... (more)

Java Virtual Machine | @CloudExpo @Stackify #DX #JVM #Java #Virtualization

A Deep Dive into the Core Metrics of the Java Virtual Machine By Eugen Paraschiv Overview of JVM Metrics In this article, we'll cover how you can monitor an application that runs on the Java Virtual Machine by going over some of the critical metrics you need to track. And, as a monitoring tool, we'll use Stackify Retrace, a full APM solution. The application we'll monitor to exemplify these metrics is a real-world Java web application built using the Spring framework. Users can register, login, connect their Reddit account and schedule their posts to Reddit. How JVM Memory Works... (more)

Fifteen Metrics for DevOps Success | @DevOpsSummit #DevOps #Serverless

Fifteen Metrics for DevOps Success By Matt Watson How is DevOps going within your organization? If you need some help measuring just how well it is going, we have prepared a list of some key DevOps metrics to track. These metrics can help you understand how your team is doing over time. Define what DevOps means to your organization The word DevOps means different things to different people. Some say it a culture and every vendor in the industry claims that their tools help with DevOps. Depending on how you define DevOps, some of these metrics may matter more or less to you and yo... (more)

The Top 21 Cloud Monitoring Tools for 2018 | @CloudExpo #Cloud #APM #Monitoring

The Top 21 Cloud Monitoring Tools for 2018 By Ben Putano Let's do a visualization exercise. Imagine it's December 31, 2018, and you're ringing in the New Year with your friends and family. You think back on everything that you accomplished in the last year: your company's revenue is through the roof thanks to the success of your product, and you were promoted to Lead Developer. 2019 is poised to be an even bigger year for your company because you have the tools and insight to scale as quickly as demand requires. You're a happy human, and it's not just because of the bubbly in yo... (more)

Build It, Buy It, or Open Source: The Software Dilemma | @DevOpsSummit #DevOps #OpenSource

Build It, Buy It, or Open Source: The Software Dilemma By Matt Watson One problem that all developers and companies struggle with is trying to decide if they should "build it" or "buy it". Software developers love to build things. That is what we do! Their natural reaction tends to lean towards building things. We are also always up for a new challenge. How do you know when you should build software or buy it? There are very good reasons for building or buying software. There are also good reasons to use open source projects, which is a third option! Some things you never want to b... (more)