Monday 28 May 2018

JCG Weekly: Java 8 filter & map & collect & Stream, Monitoring a Docker-on-Windows App

[MEGA DEAL] Ethical Hacking A to Z Bundle (96% off)

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Your Weekly Java Code Geeks Dose

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5 Questions You Need to Ask About End-User Monitoring

There are many ways for customers to engage with your business today. Whether it's through a website or mobile app, it's become important for enterprises to raise the bar and provide end users with high-performing and functionally rich applications. To ensure your brand meets customer expectations, it's important to ensure your applications are performing at their optimal level. This requires monitoring how and where customers are connecting with your business. Download this eBook for 5 must-ask questions to ensuring the most effective end-user monitoring.

 
 

Getting Started with Containers & Microservices

Across a variety of large, global companies, DevOps teams are adopting containers and microservices, two of many new tools and practices that are offering solid business benefits. Developers use containers and microservices in many tasks, from app delivery to migration of legacy systems to cloud servers. The increased popularity in containers and microservices can be attributed to their impact on agile cloud environments, with benefits that include increased efficiency, greater speed of delivery, and the ability to do more with existing resources. 

 

Best of the Week from JCG

Every developer wants to build faster and more efficiently, to support scale. Building a microservices architecture with Spring can add resilience and elasticity to your architecture that will enable it to fail gracefully and scale infinitely.
 
[MEGA DEAL] Ethical Hacking A to Z Bundle (96% off) (by Eleftheria Drosopoulou)
Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer.We are offering a massive 96% off on Ethical Hacking A to Z Bundle. Get it now with only $39, instead of the original price of $1273.

Pivotal Cloud Foundry Performance Monitoring (by Appdynamics)
One of the core strengths of Pivotal Cloud Foundry is its well-established, consistent and practical method of deploying applications. PCF provides the same user experience when deployed..
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Java 8 filter & map & collect & Stream Example (by Javin Paul)
Hello guys, many of my readers emailed me to write a post about map and filter function of Java 8 because they found it difficult to understand and use.

 
Speedment is a Java Stream ORM Toolkit and Runtime that allows you to view database tables as standard Java Streams. Because you do not have to mix Java and SQL...

Mega-Deal: Programming Courses from Only $10.99!


We have arranged a mega-deal with Udemy for your eyes only! You can purchase each course from just $10.99. The deal will be available for LIMITED TIME ONLY, so make sure to grab them now!
 

Latest JCG Examples

Servlets are essentially the first and main technology in Java world capable of dynamic page generation, now in its version 4.0 (released on September 2017)... 

Java MongoDB Select Collections Example
Hello readers, in this tutorial, we will show how to select or query the documents of a Mongo collection using the Java driver. 1. Introduction- If you have installed the MongoDB...

Java MongoDB Query Document Example
Hello readers, in this tutorial, we will show readers how to query the documents of a Mongo collection using the Java driver. 1. Introduction- If you have installed the MongoDB application (version 3.6.X) .... Apache Groovy (Groovy) is an object-oriented dynamic programming language for the Java platform. It is dynamically compiled to the Java Virtual Machine (JVM) bytecode....
  Developers using the Java EE platform achieve security through its built-in security APIs. There are two approaches to securing enterprise java applications,...

Best Web Code Geeks Articles


Monitoring a Docker-on-Windows App (by Appdynamics)
Here at AppDynamics, we've developed strong support for .NET, Windows, and Docker users.. But something we haven't spent much time documenting is how to instrument a Docker-on...

AngularJS Uppercase Example (by Yatin Batra)
Hello readers, in this tutorial, developers will learn what AngularJS is and how to use the uppercase filter in the angular applications. 1. Introduction- AngularJS is a JavaScript MVC or Model-View-Controller framework 

AngularJS vs jQuery Example (by Yatin Batra)
Hello readers, in this tutorial, we will understand the differences between the AngularJS and the jQuery libraries. 1. Introduction- For this tutorial, we will be explaining the differences and the important features of both technologies.

Best System Code Geeks Articles


Ubuntu – How do I change my username? (by Ahmad Gohar)
Unix-like operating systems decouple the user name from the user identity, so you may safely change the name without affecting the ID. All permissions, files,...

PostgreSQL: Database Creation and Data Population (by Gabriel Canepa)
With all the Relational Database Management Systems (RDBMs) out there, it may be somewhat difficult to identify the best solution for your needs and to take an informed decision as to which one to choose.
 
How to install the Apache web server (CentOS / Ubuntu Linux Installation) (by Gabriel Canepa)
In this course, we provide a compilation of Apache HTTP Server tutorials that will help you get started with this web server. We cover a wide range of topics, from installing the server and performing a basic configuration, to configuring Virtual Hosts and SSL support.

New and Noteworthy from the Community


Ignoring Exceptions in Java
In this article, I show how to ignore checked exceptions in Java. I will start by describing the rationale behind it and the common pattern to resolve this issue. Then I will present some libraries for that purpose

Guide to Java 8 concurrency using Executors
Working with the Thread class in Java can be very tedious and error-prone. Due to this reason, Concurrency API was introduced back in 2004 with the release of Java 5 and then enhanced...

IntelliJ IDEA 2018.2 Early Access Program is open!
Today we are excited to announce the start of the IntelliJ IDEA 2018.2 Early Access Program! Here are just a few reasons to download the first EAP build:...

Spring Cloud Data Flow 1.5.0 Released
The Spring Cloud Data Flow team is pleased to announce the 1.5.0 GA release. Follow the Getting Started guides for Local Server, Cloud Foundry, and Kubernetes.

Java 9 Flow API vs LMAX Disruptor
Java 9 introduces a new class Flow that allows developers to take advantage of Reactive programming. But far in the past, there was a data structure that could do the same thing: Lmax Disruptor.

Blast from the Past !


Mocking Spring Security Context for Unit Testing
Today, while writing unit test case for one of the Java method which looks like below: I want to mock Spring Security Context to get the Principal, to achieve the same I mocked each level of method calls as follows:

Kotlin and Android: JetBrains and Google Behind One Language
Google I/O 2017 had several major announcements, but one of the most interesting to me is "first-class support for Kotlin" on Android. The Kotlin blog post on this announcement discusses the benefits this brings to Kotlin users:

Running Parallel Tests in Docker
Sometimes when you are running your tests on your CI environment, you want to run tests in parallel. This parallelism is programmed in build tool such as Maven or Gradle...

Featured Mini-Books!


Apache Solr Cookbook
Solr (pronounced "solar") is an open source enterprise search platform, written in Java, from the Apache Lucene project. Its major features include full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features and rich document (e.g., Word, PDF) handling. Providing distributed search and index replication, Solr is designed for scalability and fault tolerance. Solr is the second-most popular enterprise search engine after Elasticsearch. Solr is highly reliable, scalable and fault tolerant, providing distributed indexing, replication and load-balanced querying, automated failover and recovery, centralized configuration and more. Solr powers the search and navigation features of many of the world's largest internet sites.

10 Test Automation Frameworks for Cross-Browser Testing
Get a breakdown of the market's cross-browser testing tools and top 10 test automation frameworks with details on feature sets, as well as the pros and cons of each tool. The goal of this document is to offer web development teams a set of selection criteria for choosing the correct web testing frameworks for each project. The paper provides a market overview of cross-browser testing tools, including a summary of the ten leading web testing frameworks available on the market.
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