What is OSGi? Simply put, OSGi is a standardized technology that allowsdevelopers to create the highly modular Java applications that are required forenterprise development. OSGi lets you install, start, stop, update, or uninstallcomponents without taking down your entire system. The interest in OSGi basedapplications has exploded since major vendors like Sun, Spring, Oracle,BEA, and IBM have gotten behind the standard. OSGi in Action is a comprehensive guide to OSGi with two primary goals.First, it provides a clear introduction to OSGi concepts with examples that arerelevant both for architects and developers. Then, it explores numerous practicalscenarios and techniques, answering questions like: How much of OSGi doyou actually need? How do you embed OSGi inside other containers? What arethe best practices for moving legacy systems to OSGi? Purchase of the print book comes with an offer of a free PDF, ePub, and Kindle eBook from Manning. Also available is all code from the book.

Summary Enterprise OSGI in Action is a hands-on guide for developers using OSGi to build the next generation of enterprise Java applications. By presenting relevant examples and case studies, this book guides the reader through the maze of new standards and projects. About This Book Enterprise OSGi is a set of standards for building modular Java applications which integrate seamlessly with existing Java EE technologies. It extends the OSGi component framework to distributed systems. Enterprise OSGi in Action is a hands-on guide for developers using OSGi to build enterprise Java applications. Many examples and case studies show you how to build, test, and deploy modular web applications. The book explains how to take advantage of dynamism, distribution, and automatic dependency provisioning, while still integrating with existing Java EE applications. The book is written for Java EE developers. No prior experience with OSGi is required. What's Inside Build modular applications using servlets, JSPs, WARs, and JPA Better component reuse and robustness Expert tips for Apache Aries Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. About the Authors Holly Cummins and Tim Ward are lead engineers who regularlyspeak at developerWorks, Devoxx, JavaZone, and EclipseCon. Tim has written standards in both the OSGi Core and Enterprise Specifications and both authors are active Apache Aries committers. Table of Contents PART 1 PROGRAMMING BEYOND HELLO WORLD OSGi and the enterprise—why now? Developing a simple OSGi-based web application Persistence pays off Packaging your enterprise OSGi applications PART 2 BUILDING BETTER ENTERPRISE OSGI APPLICATIONS Best practices for enterprise applications Building dynamic applications with OSGi services Provisioning and resolution Tools for building and testing IDE development tools PART 3 INTEGRATING ENTERPRISE OSGI WITH EVERYTHING ELSE Hooking up remote systems with distributed OSGi Migration and integration Coping with the non-OSGi world Choosing a stack

A Hands-On Guide to Equinox and the OSGi Framework In OSGI and Equinox: Creating Highly Modular JavaTM Systems, three leading experts show developers—for the first time—exactly how to make the most of these breakthrough technologies for building highly modular dynamic systems. You’ll quickly get started with Eclipse bundle tooling, create your first OSGi-based system, and move rapidly to sophisticated production development. Next, you’ll master best practices and techniques for creating systems with exceptional modularity and maintainability. You’ll learn all about OSGi’s Declarative Services and how to use them to solve a wide variety of real-world problems. Finally, you’ll see everything that you’ve learned implemented in a complete case study project that takes you from early prototype through application delivery. For every Eclipse developer, regardless of previous experience, this book Combines a complete hands-on tutorial, online sample code at every step, and deep technical dives for working developers Covers the OSGi programming model, component development, OSGi services, Eclipse bundle tooling, server-side Equinox, and much more Offers knowledge, guidance, and best practices for overcoming the complexities of building modular systems Addresses practical issues ranging from integrating third-party code libraries to server-side programming Includes a comprehensive case study that goes beyond prototyping to deliver a fully refined and refactored production system Whatever your application, industry, or problem domain, if you want to build state-of-the-art software systems with OSGi and Equinox, you will find this book to be an essential resource.

Summary OSGi in Depth shows Java developers how to develop to the OSGi Service Platform Enterprise specification, an emerging Java-based technology for developing modular enterprise applications. About the Technology OSGi is a mature framework for developing modular Java applications. Because of its unique architecture, you can modify, add, remove, start, and stop parts of an application without taking down the whole system. You get a lot of benefit by mastering the basics, but OSGi really pays off when you dig in a little deeper. About this Book OSGi in Depth presents practical techniques for implementing OSGi, including enterprise services such as management, configuration, event handling, and software component models. You'll learn to custom-tailor the OSGi platform, which is itself modular, and discover how to pick and choose services to create domain-specific frameworks for your business. Also, this book shows how you can use OSGi with existing JEE services, such as JNDI and JTA. Written for Java developers who already know the basics, OSGi in Depth picks up where OSGi in Action leaves off. Purchase of the print book comes with an offer of a free PDF, ePub, and Kindle eBook from Manning. Also available is all code from the book. What's Inside Deep dives into modularization, implementation decoupling, and class-loading Practical techniques for using JEE services Customizing OSGi for specific business domains ========================================​===== Table of Contents OSGi as a new platform for application development An OSGi framework primer The auction application: an OSGi case study In-depth look at bundles and services Configuring OSGi applications A world of events The persistence bundle Transactions and containers Blending OSGi and Java EE using JNDI Remote services and the cloud Launching OSGi using start levels Managing with JMX Putting it all together by extending Blueprint

Java EE developers increasingly want to utilize OSGi to develop modular applications for component and service-based architectures. But tools required for OSGi implementation have been slow to develop. Spring Dynamic Modules (Spring DM) is a framework that simplifies the creation of component and service-oriented architectures with OSGi, to build modular Java applications using the powerful Spring framework. Spring Dynamic Modules in Action presents the fundamental concepts of OSGi-basedapps and maps them to the familiar ideas of the Spring framework. Then, it teaches the techniques and concepts required to develop stable, flexible enterprise apps. Along the way, readers will learn to incorporate other topics including dependency injection and unit testing in an OSGi-based environment. Purchase of the print book comes with an offer of a free PDF, ePub, and Kindle eBook from Manning. Also available is all code from the book.

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 applications Explore the basics of OSGi bundles and modular application design Learn advanced topics, including semantic versioning, integration testing, and configuring components Understand OSGi pitfalls, anti-patterns, and features you should avoid Create a modular architecture for cloud-based web applications Discover how maintainability, extensibility, scalability, and testability are affected by modular design Get a look at various options for creating web applications with a modular approach Interact with persistent storage services, including relational databases and NoSQL Examine alternatives for deploying modular applications to the cloud

"Modular Java" is a pragmatic guide to developing modular applications using OSGi, the framework for dynamic modularity in Java, and Spring Dynamic Modules, an OSGi extension to the Spring Framework.