Developing Microservices with Node.js

Learn to develop efficient and scalable microservices for server-side programming in Node.js using this hands-on guideAbout This BookReal world example explained chapter after chapter with code examples. Useful concepts for other languages like Java or PHPEasy to follow by people with little to none experience in Node.jsNode.js Version 0.12.2 and the latest compatible versions of Seneca and PM2Who This Book Is ForNode.js developer with basic server-side development knowledge - but no knowledge of implementing microservices in Node.js applications. Also useful for developers in other languages like Java or C♯. What You Will LearnIdentify where the microservice oriented architectures can tackle the most common problems in the software used by the big organisations. Re-architecture an existing monolithic system into a microservices oriented software. Build robust and scalable microservices using Seneca and Node.js. Testing of the microservices in insolation in order to create a solid system. Deploy and manage microservices using PM2Monitoring the health of a microservice (CPU, memory, I/O ...) and how the degradation of the performance in one microservice could degrade the performance of full system. In DetailMicroservices architecture is a style of software architecture. As the name suggests, microservicess refers to small services. For a large implementation, this means breaking the system into really small, independent services. Alternative to monolithic architecture (where the entire system is considered as a single big, interwoven segment), microservices approach is getting more and more popular with large, complex applications that have a very long lifecycle, which require changes at regular intervals. Microservices approach allows this type of changes with ease as only a part of the system undergoes changes and change control is easy. An example of such large system can be an online store--includes user interface, managing product catalog, processing orders, managing customer's account. In a microservices architecture each of these tasks will be divided and into smaller services. Also, these services will be further broken down into independent services--for user interface, there will be separate services for input, output, search bar management, and so on. Similarly, all other tasks can be divided in very small and simple services. Style and approachThis book is a comprehensive guide to developing production-ready implementation of the microservices architecture with Node.js. Each chapter builds up on the earlier one creating a strong foundation on which you create your own microservice in a distributed environment.

Cover; Copyright; Credits; About the Author; About the Reviewer; www.PacktPub.com; Table of Contents; Preface; Chapter 1: Microservices Architecture; Need for microservices; Monolithic software; Microservices in the real world; Microservice-oriented architectures; How is it better?; Shortcomings; Key design principles; Business units, no components; Smart services, dumb communication pipes; Decentralization; Technology alignment; How small is too small?; Key benefits; Resilience; Scalability; Technology heterogeneity; Replaceability; Independence; Why is replaceability important?

Easy to deploySOA versus microservices; Why Node.js?; API aggregation; The future of Node.js; Summary; Chapter 2: Microservices in Node.js -- Seneca and PM2 Alternatives; Need for Node.js; Installing Node.js, npm, Seneca, and PM2; Learning npm; Our first program -- Hello World; Node.js threading model; Modular organization best practices; Javascript; SOLID design principles; Seneca -- a microservices framework; Inversion of control done right; Pattern matching in Seneca; Patrun -- a pattern-matching library; Reusing patterns; Writing plugins; Web server integration.

PM2 -- a task runner for Node.jsSingl…