The upcoming Java 9 module system will affect existing applications and offer new ways of creating modular and maintainable applications. With this hands-on book, Java developers will learn not only about the joys of modularity, but also about the patterns needed to create truly modular and reliable applications. Authors Sander Mak and Paul Bakker teach you the concepts behind the Java 9 module system, along with the new tools it offers. You'll also gain learn how to modularize existing code and how to build new Java applications in a modular way. Understand Java 9 module system concepts Master the patterns and practices for building truly modular applications Migrate existing applications and libraries to Java 9 modules Use JDK 9 tools for modular development and migration

If you're an experienced Java developer in the enterprise, this practical, hands-on book shows you how to use OSGi to design, develop, and deploy modular cloud applications. You'll quickly learn how to use OSGi, through concise code examples and a set of best practices derived from the authors' experiences with real-world projects.

Through the course of this book, you'll learn to develop modern web applications with tools and techniques such as RESTful Web Services, NoSQL, provisioning, elasticity, Auto Scaling, hotfixes, and automatic failover. Code samples are available from GitHub.Work with dynamic OSGi services to create modular applicationsExplore the basics of OSGi bundles and modular application designLearn advanced topics, including semantic versioning, integration testing, and configuring componentsUnderstand OSGi pitfalls, anti-patterns, and features you should avoidCreate a modular architecture for cloud-based web applicationsDiscover how maintainability, extensibility, scalability, and testability are affected by modular designGet a look at various options for creating web applications with a modular approachInteract with persistent storage services, including relational databases and NoSQLExamine alternatives for deploying modular applications to the cloud