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