Leverage this step-by-step guide to build a highly secure, fault-tolerant, and scalable Cloud environment About This Book ? Learn how to leverage various Amazon Web Services (AWS) components and services to build a secure, reliable, and robust environment to host your applications on. ? Delve into core AWS service offerings with hands-on tutorials, real-world use case scenarios, and best practices. ? A self-paced, systematic, and step-by-step guide to learning and implementing AWS in your own environment. Who This Book Is For This book is for those who want to learn and leverage the rich plethora of services provided by AWS. Although no prior experience with AWS is required, it is recommended that you have some hands-on experience of Linux, Web Services, and basic networking. What You Will Learn ? Take an in-depth look at what's new with AWS, along with how to effectively manage and automate your EC2 infrastructure with AWS Systems Manager ? Deploy and scale your applications with ease using AWS Elastic Beanstalk and Amazon Elastic File System ? Secure and govern your environments using AWS CloudTrail, AWS Config, and AWS Shield ? Learn the DevOps way using a combination of AWS CodeCommit, AWS CodeDeploy, and AWS CodePipeline ? Run big data analytics and workloads using Amazon EMR and Amazon Redshift ? Learn to back up and safeguard your data using AWS Data Pipeline ? Get started with the Internet of Things using AWS IoT and AWS Greengrass In Detail Many businesses are moving from traditional data centers to AWS because of its reliability, vast service offerings, lower costs, and high rate of innovation. AWS can be used to accomplish a variety of both simple and tedious tasks. Whether you are a seasoned system admin or a rookie, this book will help you to learn all the skills you need to work with the AWS cloud. This book guides you through some of the most popular AWS services, such as EC2, Elastic Beanstalk, EFS, CloudTrail, Redshift, EMR, Data Pipeline, and IoT using a simple, real-world, application-hosting example. This book will also enhance your application delivery skills with the latest AWS services, such as CodeCommit, CodeDeploy, and CodePipeline, to provide continuous delivery and deployment, while also securing and monitoring your environment's workflow. Each chapter is designed to provide you with maximal information about each AWS service, coupled with easy to follow, hands-on steps, best practices, tips, and recommendations. By the end of the book, you will be able to create a highly secure, fault-tolerant, and scalable environment for your applications to run on. Style and approach This in-depth and insightful guide is filled with easy-to-follow examples, real-world use cases, best practices, and recommendations that will help you design and leverage some of the most commonly used AWS services.

This book will teach the concepts of test driven development in Java so you can build clean, maintainable and robust code About This Book ? Explore the most popular TDD tools and frameworks and become more proficient in building applications ? Create applications with better code design, fewer bugs, and higher test coverage, enabling you to get them to market quickly ? Implement test-driven programming methods into your development workflows Who This Book Is For If you're an experienced Java developer and want to implement more effective methods of programming systems and applications, then this book is for you. What You Will Learn ? Explore the tools and frameworks required for effective TDD development ? Perform the Red-Green-Refactor process efficiently, the pillar around which all other TDD procedures are based ? Master effective unit testing in isolation from the rest of your code ? Design simple and easily maintainable code by implementing different techniques ? Use mocking frameworks and techniques to easily write and quickly execute tests ? Develop an application to implement behavior-driven development in conjunction with unit testing ? Enable and disable features using feature toggles In Detail Test-driven development (TDD) is a development approach that relies on a test-first procedure that emphasizes writing a test before writing the necessary code, and then refactoring the code to optimize it.The value of performing TDD with Java, one of the longest established programming languages, is to improve the productivity of programmers and the maintainability and performance of code, and develop a deeper understanding of the language and how to employ it effectively. Starting with the basics of TDD and understanding why its adoption is beneficial, this book will take you from the first steps of TDD with Java until you are confident enough to embrace the practice in your day-to-day routine.You'll be guided through setting up tools, frameworks, and the environment you need, and we will dive right into hands-on exercises with the goal of mastering one practice, tool, or framework at a time. You'll learn about the Red-Green-Refactor procedure, how to write unit tests, and how to use them as executable documentation.With this book, you'll also discover how to design simple and easily maintainable code, work with mocks, utilize behavior-driven development, refactor old legacy code, and release a half-finished feature to production with feature toggles.You will finish this book with a deep understanding of the test-driven development methodology and the confidence to apply it to application programming with Java. Style and approach An easy-to-follow, hands-on guide to building applications through effective coding practices. This book covers practical examples by introducing different problems, each one designed as a learning exercise to help you understand each aspect of TDD.

Manage state in Angular to write high performing web apps by combining the power of Flux, RxJS, and NgRx About This Book ? Learn what makes an excellent Angular application architecture ? Use Redux to write performant, consistent Angular applications ? Incorporate Reactive Programming principles and RxJS to make it easier to develop, test, and debug your Angular applications Who This Book Is For If you have been developing Angular applications and want to dive deeper into the Angular architecture with Redux, RxJS, and NgRx to write robust web apps, then this book is for you. What You Will Learn ? Understand the one-way data flow and Flux pattern ? Work with functional programming and asynchronous data streams ? Figure out how RxJS can help us address the flaws in promises ? Set up different versions of cascading calls ? Explore advanced operators ? Get familiar with the Redux pattern and its principles ? Test and debug different features of your application ? Build your own lightweight app using Flux, Redux, and NgRx In Detail Managing the state of large-scale web applications is a highly challenging task with the need to align different components, backends, and web workers harmoniously. When it comes to Angular, you can use NgRx, which combines the simplicity of Redux with the reactive programming power of RxJS to build your application architecture, making your code elegant and easy to reason about, debug, and test. In this book, we start by looking at the different ways of architecting Angular applications and some of the patterns that are involved in it. This will be followed by a discussion on one-way data flow, the Flux pattern, and the origin of Redux. The book introduces you to declarative programming or, more precisely, functional programming and talks about its advantages. We then move on to the reactive programming paradigm. Reactive programming is a concept heavily used in Angular and is at the core of NgRx. Later, we look at RxJS, as a library and master it. We thoroughly describe how Redux works and how to implement it from scratch. The two last chapters of the book cover everything NgRx has to offer in terms of core functionality and supporting libraries, including how to build a micro implementation of NgRx. This book will empower you to not only use Redux and NgRx to the fullest, but also feel confident in building your own version, should you need it. Style and approach This book covers everything there is to know to get well-acquainted with Angular without bogging you down. Everything is neatly laid out under clear headings for quick consultation, giving you the information required to understand a concept immediately.

Design RPA solutions to perform a wide range of transactional tasks with minimal cost and maximum ROI About This Book ? A beginner's guide to learn Robotic Process Automation and its impact on the modern world ? Design, test, and perform enterprise automation task with UiPath ? Create Automation apps and deploy them to all the computers in your department. Who This Book Is For If you would like to pursue a career in Robotic Process Automation or improve the efficiency of your businesses by automating common tasks, then this book is perfect for you. Prior programming knowledge of either Visual Basic or C# will be useful. What You Will Learn ? Understand Robotic Process Automation technology ? Learn UiPath programming techniques to deploy robot configurations ? Explore various data extraction techniques ? Learn about integrations with various popular applications such as SAP and MS Office ? Debug a programmed robot including logging and exception handling ? Maintain code version and source control ? Deploy and control Bots with UiPath Orchestrator In Detail Robotic Process Automation (RPA) enables automating business processes using software robots. Software robots interpret, trigger responses, and communicate with other systems just like humans do. Robotic processes and intelligent automation tools can help businesses improve the effectiveness of services faster and at a lower cost than current methods. This book is the perfect start to your automation journey, with a special focus on one of the most popular RPA tools: UiPath. Learning Robotic Process Automation takes you on a journey from understanding the basics of RPA to advanced implementation techniques. You will become oriented in the UiPath interface and learn about its workflow. Once you are familiar with the environment, we will get hands-on with automating different applications such as Excel, SAP, Windows and web applications, screen and web scraping, working with user events, as well as understanding exceptions and debugging. By the end of the book, you'll not only be able to build your first software bot, but also you'll wire it to perform various automation tasks with the help of best practices for bot deployment. Style and approach This book will help you kick-start your automation journey with a special focus on one of the most popular RPA tools: UiPath.

Enhance your Kotlin programming skills by building 3 real-world applications About This Book ? Build three full-fledged, engaging applications from scratch and learn to deploy them ? Enhance your app development and programming activities with Kotlin’s powerful and intuitive tools and utilities. ? Experience the gentle learning curve, expressiveness, and intuitiveness of Kotlin, as you develop your own applications Who This Book Is For This book is for those who are new to Kotlin or are familiar with the basics, having dabbled with Java until now. Basic programming knowledge is mandatory. What You Will Learn ? Learn the building blocks of the Kotlin programming language ? Develop powerful RESTful microservices for Android applications ? Create reactive Android applications efficiently ? Implement an MVC architecture pattern and dependency management using Kotlin ? Centralize, transform, and stash data with Logstash ? Secure applications using Spring Security ? Deploy Kotlin microservices to AWS and Android applications to the Play Store In Detail Kotlin greatly reduces the verbosity of source code. With Google having announced their support for Kotlin as a first-class language for writing Android apps, now's the time learn how to create apps from scratch with Kotlin Kotlin Programming By Example takes you through the building blocks of Kotlin, such as functions and classes. You’ll explore various features of Kotlin by building three applications of varying complexity. For a quick start to Android development, we look at building a classic game, Tetris, and elaborate on object-oriented programming in Kotlin. Our next application will be a messenger app, a level up in terms of complexity. Before moving onto the third app, we take a look at data persistent methods, helping us learn about the storage and retrieval of useful applications. Our final app is a place reviewer: a web application that will make use of the Google Maps API and Place Picker. By the end of this book, you will have gained experience of of creating and deploying Android applications using Kotlin. Style and approach Here we will build three exciting projects in Kotlin which will demonstrate how to effectively use Kotlin language constructs

Create microservices using Java EE technologies using WildFly Swarm,deploy them in the OpenShift cloud, make them resilient to network failures using Hystrix, configure continuous integration using Jenkins, and security using Keycloak. About This Book ? Create functional microservices with WildFly Swarm ? Use OpenShift to deploy your microservices in the cloud ? Make your application production-ready using Jenkins, Hystrix, and Keycloak Who This Book Is For If you're an experienced developer familiar with Java EE technologies and would like to learn how you can use those technologies in the cloud with WildFly and OpenShift, then this book is for you. What You Will Learn ? Utilize Java EE technology to develop modern cloud-enabled applications ? Easily create microservices with WildFly Swarm using proven Java EE technologies ? See the benefits of OpenShift – easy deployment of your services, out of the box scalability and healing, and integration with Continuous Integration tools ? Integrate the sample application with Jenkins’ Continuous Integration server ? Utilize Netflix OSS to connect your services and provide resilience to your application ? Provide security to your application using Keycloak In Detail The book starts by introducing you to WildFly Swarm—a tool that allows you to create runnable microservices from Java EE components. You’ll learn the basics of Swarm operation—creating a microservice containing only the parts of enterprise runtime needed in a specific case. Later, you’ll learn how to configure and test those services. In order to deploy our services in the cloud, we’ll use OpenShift. You’ll get to know basic information on its architecture, features, and relationship to Docker and Kubernetes. Later, you’ll learn how to deploy and configure your services to run in the OpenShift cloud. In the last part of the book, you’ll see how to make your application production-ready. You’ll find out how to configure continuous integration for your services using Jenkins, make your application resistant to network failures using Hystrix, and how to secure them using Keycloak. By the end of the book, you’ll have a fully functional example application and will have practical knowledge of Java EE cloud development that can be used as a reference in your other projects. Style and approach This example-based tutorial guides you step by step through creating an application based on well-known Java EE technologies (JAX-RS, CDI, JPA, and JSF) and modern architectural patterns.

Discover solutions to all your Tkinter and Python GUI development problems About This Book ? Integrate efficient Python GUI programming techniques with Tkinter ? Efficiently implement advanced MVC architectures in your Python GUI apps ? Solve all your problems related to Tkinter and Python GUI development Who This Book Is For This book is for Python developers who are familiar with the basics of the language syntax, data structures, and OOP. You do not need previous experience with Tkinter or other GUI development libraries. What You Will Learn ? Add widgets and handle user events ? Lay out widgets within windows using frames and the different geometry managers ? Configure widgets so that they have a customized appearance and behavior ? Improve the navigation of your apps with menus and dialogs ? Apply object-oriented programming techniques in Tkinter applications ? Use threads to achieve responsiveness and update the GUI ? Explore the capabilities of the canvas widget and the types of items that can be added to it ? Extend Tkinter applications with the TTK (themed Tkinter) module In Detail As one of the more versatile programming languages, Python is well-known for its batteries-included philosophy, which includes a rich set of modules in its standard library; Tkinter is the library included for building desktop applications. Due to this, Tkinter is a common choice for rapid GUI development, and more complex applications can benefit from the full capabilities of this library. This book covers all of your Tkinter and Python GUI development problems and solutions. Tkinter GUI Application Development Cookbook starts with an overview of Tkinter classes and at the same time provides recipes for basic topics, such as layout patterns and event handling. Next, we cover how to develop common GUI patterns, such as entering and saving data, navigating through menus and dialogs, and performing long-running actions in the background. You will then make your apps leverage network resources effectively, perform 2D and 3D animation-related tasks, create 3D objects, and perform advanced graphical operations. Finally, this book covers using the canvas and themed widgets. By the end of the book, you will have an in-depth knowledge of Tkinter classes, and will know how to use them to build efficient and rich GUI applications. Style and approach A practical recipe-based guide that will help you find solutions to all your Tkinter and Python GUI development-related problems.

The Rancher’s Special Delivery The “package” is addressed to him, but rancher Sterling Blackwell certainly didn’t order a baby! More scandalous still, he and the town’s pretty teacher are named as parents. With gossip running wild, only a marriage of convenience can protect little Gracie and their reputations until her real family is found. Heather O’Connor is content to be Valentine, Montana’s spinster schoolmarm…until Gracie’s arrival stirs her heart. She can’t keep the adorable child without Sterling’s help, though she promises not to interfere with his life. But staying aloof from her handsome husband isn’t easy with a tiny matchmaker in tow. A mistake brought them together, but love might just make them a family by Christmas… Montana Courtships: Romance unfolds under the Big Sky

A Baby for Christmas The only Christmas gift Oscar Rabb’s four-year-old daughter prays for is one the widower can’t provide: a baby sibling. And when his neighbor’s house burns down, he’s willing to open his home to pregnant and widowed Kate Amaker and her in-laws—but not his heart. Even if his little girl’s convinced Kate’s unborn child is the answer to her wish. Kate quickly sees the generous but aloof Oscar has little interest in growing closer to his houseguests. Still, she intends to make the coming Christmas a season to remember for his daughter. And as Oscar starts to open up to her, Kate can’t help picturing just how wonderful the holidays—and a future together—might be.

“DO WHAT WE TELL YOU OR YOUR SON WILL DISAPPEAR…” Master gemstone cutter Carly Rose Kelley will do anything to keep her son safe…but with blackmailers insisting she forge priceless antique stones, she needs help. With Christmas days away, the desperate widow has only one hope—the brother-in-law she never met. Hostage rescue specialist Dallas Morgan never knew about his nephew, or his estranged late brother's wife. Now their lives are in his hands. But the sweet child and vulnerable woman remind Dallas of the family he once had and lost. And he can’t afford distraction. Trapped in the sights of ruthless blackmailers, nowhere is safe…but Dallas won’t let anyone stand in the way of him saving Carly and her little boy. MISSION: RESCUE—No job is too dangerous for these fearless heroes.

UNDER THE RANCHER’S PROTECTION Someone is dead set on stopping Shelby Arroyo from doing her job: assessing mineral rights in a mine in gold country. But after rancher Barrett Thorn rescues her from an attack, the handsome widowed cowboy seems to feel responsible for her. That is, until he discovers she’s from the family that he’ll never forgive for his wife’s death. As the threats against Shelby escalate, cowboy honor and an unexpected attraction keep Barrett by her side, even at his own risk. And since Shelby won’t back down, Barrett must protect the brave, loyal woman he has no business falling for…a woman someone wants to kill by Christmas. Gold Country Cowboys: The code of the west rules the land for these men.

FORGOTTEN MEMORIES None of her training prepares astronaut Natasha Stark for what she wakes up to three weeks after her groundbreaking space voyage: a target on her back—and no memories. But there's something oddly familiar about the FBI agent who rescues her. Christopher Barton can't believe he drew the mission of safeguarding his long-ago fiancée and her daughter—a child he has every reason to believe is his. To learn the truth, though, he has to help Natasha regain her memory. But with threats mounting against the family he hopes to join, Chris is running out of time to take down the assailants before they kill the woman he never forgot and the child he never knew existed.

ONE WILD RIDE After careful planning, Jess Hayward is finally hitting the bull riding circuit to chase his dreams. There’s just one complication—he’s agreed to bring along his late best friend’s little sister, Emma Sullivan. Jess could use a second driver, and after calling off her wedding, Emma needs an escape. It’s a win-win arrangement…in theory. Free-spirited and impulsive, Emma is the exact opposite of Jess—a problem he’s anticipating on the road. Only she’s not the annoying little tag-a-long he remembers. And the intense attraction between them is no childhood crush. If Jess wants to be a champion, he needs to keep his head in the game. But lately all he can think about is Emma…

CHRISTMAS FRAME-UP Nothing will stop Secret Service agent Liberty Westmark from warning her ex-fiancé that he's wanted on a terrorism charge—not even gunmen determined to kill them both. After breaking his heart, she owes Tate Almers that…especially since only she believes his innocence. Partnering with Liberty again is the last thing Tate, a former Secret Service agent, wants for Christmas. But with a mountain of evidence against him and both the feds and a rogue cartel behind him, Tate needs Liberty beside him. They've become the targets of a manhunt with only one ending…and they have only each other to stay alive. Secret Service Agents: Always watching, always ready to protect.

NO EASY ESCAPE Chased across Amsterdam by a human trafficking ring, social advocate Kayla Brooks refuses to help them recapture Mercy, the young girl she rescued from their clutches. Even if they’ve already abducted her father as a hostage…and wouldn’t hesitate to kill her. There’s only one man Kayla can turn to for help: her ex-fiancé’s brooding older brother, Levi Cummings. Though Kayla relies on the handsome former Army Intelligence Officer’s experience, fully trusting Levi seems impossible after she helped send his brother to jail. But as they struggle to save her father, protect Mercy, and outmaneuver the traffickers, Kayla and Levi’s bond transcends pure survival. Armed with only a few clues about her father’s location, though, Kayla and Levi must bring down the crime ring…or lose all their lives.

AMISH COUNTRY SECRETS For reporter Grace Miller, her Amish hometown seems the perfect place to recuperate from surgery—until a tragedy puts her on the trail of her mother's long-unsolved murder. Now someone's set their lethal sights on her, determined to keep the truth behind her mother’s death and a fatal car crash involving local teens hidden. Discovering Grace is in danger, police captain Conner Gates drops everything to protect her…and help solve the cold case his father could not. But as they delve into the past, can they face down the dangerous foe hiding in plain sight, threatening to turn their blossoming love into a deadly trap?

Elephants, blazing skies and her two best friends… Maddie can’t wait to return to Kenya! Until she learns the bill her law firm has sent her to fight is the same one her friend Haki helped write. At first, her work feels disloyal to Haki, but soon the sparks flying between them aren’t anger…but something more. Much more. Which is another kind of betrayal. Her cousin Pippa has been counting on a proposal from Haki for years. But to Maddie, denying her love for Haki also means betraying herself.

If anyone can save him, she's the one Jerrod Walters hopes relocating to the coastal town of Two Moon Bay can be the fresh start he and his young daughter need. But the single dad is caught off guard when a beautiful PR professional offers to promote his diving excursions to legendary shipwreck sites.There’s so much he admires about Dawn Larson, starting with the woman's upbeat, can-do personality. Dawn’s boundless capacity for joy might be the only thing capable of bringing him back to life after his tragic loss…

He’ll always love Miranda Jefferson… But this cop has a job to do. Seeing his high school sweetheart after fourteen years fills Holly River police chief Carter Cahill with so many conflicting emotions. One thing hasn’t changed—the love that brought them together in the first place. But the single mother’s asking something Carter isn’t sure he can give. Is he a man who follows the law… or his heart?

Now that she’s healed… can she heal him? Armed with a clean bill of health, ER doctor April Sprader is ready to check off items on her bucket list. After meeting Zach Harrison, number four–start dating–shoots to the top. But the workaholic sports agent and caregiver has no spare time. Unless April can persuade Zach that this could be a second chance for them both…

Now that she’s healed… can she heal him? Armed with a clean bill of health, ER doctor April Sprader is ready to check off items on her bucket list. After meeting Zach Harrison, number four–start dating–shoots to the top. But the workaholic sports agent and caregiver has no spare time. Unless April can persuade Zach that this could be a second chance for them both…