Jan 29, 2011 the book then kicks off the bookshelf project, a case study that will be used to progressively explain the important concepts around osgi using the felix framework the bookshelf project feature trail will set the context to explain osgi headers, the bundle activator, the bundle context and so on. Originally intended to bring java into embedded systems. Apache felix is a community effort to implement the osgi framework and service platform and other interesting osgi related technologies under the apache license. Introduction the osgi compendium specification has now standardized the annotation usage for declarative services. The way bnd works is by treating your project as a big collection of classes e.
Osgi and spring, part 1, build and deploy osgi bundles using apache felix. A recent post about managed services reminded me of a feature in apache felix file install that i found worth mentioning. So how would you really use it to practical modular applications. The java annotations of the apache felix scr plugin were one of the first options to use annotations to create the descriptors for osgi declarative services components and osgi metatype descriptions for the configuration of such components. Migrating from the apache felix scr annotations to the osgi. Implementation of the declarative services specification 1. If you are interested to know more about the technology, or would like to meet up with some of the people involved with creating and using the specifications be sure to visit one of the conferences or meetups that the osgi alliance participates in. Use features like bookmarks, note taking and highlighting while reading osgi and apache felix 3. Pdf the idea behind cloud computing is to deliverinfrastructure, platform. As part of the ongoing osgi specification process, there is a movement to standardize the api for launching and embedding osgi framework implementations. Dec 10, 2007 felix is the apache implementation of osgi release 4 specification. A stepbystep beginners guide to implementing a reallife osgi application, with the apache felix 3. A contract between the container and the application the latest osgi specification is osgi service platform release 4. Apache felix apache felix framework usage documentation.
The open source options include apache felix, eclipse concierge, eclipse equinox, knopflerfish. Make sure your manifest file ends in a trailing carriage return or else the last line will be ignored. Osgi lets you install, start, stop, update, or uninstall modules at execution time without taking down your entire system. For example, apache felix osgi management console has the persistent identity. Apache felix apache felix framework launching and embedding. For firsttime users, here are a few links that might get you started more quickly. Felix has an implementation for it that is based around jetty 4. Apache felix manifest generator mangen apache felix.
To compile our source code, we need to have the felix. This post is part of a series of posts on java modularity with osgi and declarative services please follow the previous parts first part 1, part 2, part 3summary. The purpose of this page is to record progress in commons of osgienabled releases and any notes on specific issues with configuration of the osgi manifest entries the apache felix project an osgi implementation have requested that commons components include osgi meta data in their jars so that they are readytouse in an osgi environment. A set of services an osgi container must implement 2.
Felix5431 tutorial about osgi with apache felix asf jira. The apache felix project an osgi implementation have requested that commons components include osgi meta data in their jars so that they are readytouse in an osgi environment. Using annotations with osgi declarative services kishanthan. It also monitors configuration files and updates managed services when their respective configuration changes. For merging pdf files, ill be using a java pdf library pdfbox. Learn everything needed about the felix framework and get familiar with gogo, its commandline shell to start developing your osgi applications. The felix class also includes the following three additional public methods. This book introduces osgi on the simple and extensible felix framework and guides you from the development environment setup to the troubleshooting of potential issues, walking you through the development of an osgibased application and explaining. Felix is the apache implementation of osgi release 4 specification. Once called the open services gateway initiative, the osgi alliance now refers to the framework specification as osgi or the osgi service platform. There are number of open source osgi container implementations such as equinox knoplerfish apache felix. I hope you will find this information as well as the content useful. Finally, the book describes some of the common pitfalls during bundle development, and gives hints on troubleshooting them in felix. Eclipse equinox and apache felix also supported the osgi.
Configuration of the apache felix osgi management console. Apache felix is an open source implementation of the osgi core release 6 framework specification. Apache felix is one of the most famous implementations of the osgi framework specification. Annotations for generating osgi service descriptors.
Apache felix karaf works outofthebox with felix and equinox osgi platform for any application web, enterprise, desktop almost complete pdf manual available in karaf 1. The author assumes the reader knows nothing about osgi, apache felix, or the development environment so its good for any competent java developer. Second, you will create your first osgi bundle and deploy it in this framework. The approach is to have the framework implement the org. This presentation introduces the android platform, osgi, and demonstrates how to run apache felix on android. Using the osgi bundle repository in osgi and apache felix 3. The osgi bundle repository obr is a draft specification from the osgi alliance for a service that would allow getting access to a set of remote bundle repositories. Is the open source osgi container from the apache software foundation. Richard hall, a project committer, did a presentation on felix at apachecon last month. Commonsosgi apache commons apache software foundation. The osgi framework will automatically handle the details of resolving import packages. Osgi is a set of specifications, which are developed and released by an industry consortium called the osgi alliance apache felix is a project in which several of the osgi specifications are implemented. In the case of assignment or simple forms, the path parameter can point to a file or directory.
Issue with aem assemblerservice not able to assemble 2 or more. I had devoted the second chapter of the book to osgi with apache felix. Its the backbone of the eclipse plugin system, as well as many java ee containers, such as glassfish, geronimo, and websphere. This section describes the differences from older versions of the framework. Hall has already explained how apache felix works and what osgi is so i wont be. There are number of open source osgi container implementations such as. It is the modular java runtime at the heart of the eclipse ide, knopflerfish, is an open source implementation of the osgi r3 and osgi r4 specifications. Apache felix application demonstration this document is a work in progress. Simplify your osgi development experience by learning about felix ipojo. Download it once and read it on your kindle device, pc, phones or tablets. A stepbystep guide for developers to build java components and package them as osgi bundles using apache felix, an open source osgi container. In this tutorial, the declarative services are implemented using the apache felix maven scr plugin.
If you still have questions you can ask them on the felix user list. The start method is used to start the framework instance, while the stop method is used to asynchronously stop the framework instance. The people from packt publishing contacted me based. This page presents an example application to demonstrate the various approaches to consider when creating a osgi felix based application. Using the osgi bundle repository in osgi and apache felix. Apache karaf european meetup on april 30th 2020 the first apache karaf european meetup will be on april 30th 2020, online, free to join karaf runtime 4. With the osgi r6 release from 2015, the annotations of the osgi specifications provide the same functionality and go. This plugin for maven 2 is based on the bnd tool from peter kriens. Mar 29, 2014 a point to note that apache felix project also has its own annotations, based on org. The specification clearly mentions that there should be some tools that are capable of processing these.
Apache felix apache felix application demonstration. To stop the framework type stop 0 to stop the system bundle. We intend to start merging these different libraries. These sources are merged together using the following precedence.
Getting started the openejb eclipse plugin provides the org. This tutorial creates successively more complex osgi bundles to illustrate most of the features and functionality offered by the osgi framework. The osgi specification is a module system and service platform that implements a complete and dynamic component model. For the instruction, actual file paths are relative to the pom. Currently, there are three popular open source osgi containers. The osgi specifications originally targeted embedded devices and home services gateways, but they are ideally suited for any project interested in the principles of modularity, componentorientation, andor. Get yourself acquainted with the osgi concepts, in an easytofollow progressive manner. The bundle repository service provides a shell command, named obr, to access available bundles. This book introduces osgi on the simple and extensible felix framework and guides you from the development environment setup to the troubleshooting of potential issues, walking you through the development of an osgi based application and explaining. Each remote repository, potentially a front for a federation of repositories, provides a list of bundles available for download, along with. The book is accompanied with a full source code available at github see the link to the publishers site. I chose knopflerfish, because it is easy to install and provides a great desktop gui, that will help you to get your first bundles deployed in an osgi framework. Migrating from the apache felix scr annotations to the. Downloads go to the download page and download and extract the felix release launching felix go to the felix usage page to learn how to launch the felix framework osgi tutorial go to the tutorial page to learn some osgi basics osgi faq check out the osgi faq for answers to common.
Configure your osgi services with apache felix file install. This tutorial describes how the netbeans ide can be used to define osgi bundles in maven projects. So whereas osgi gives you a specification essentially a pdf document. This requires manual configuration using crxde lite. The reader is walked through an application buildup, with each chapter presenting just enough overview material to understand why theyre doing what theyre doing the bulk of each chapter is code.
When you instantiate the felix class, the resulting object is actually the system bundle and can be cast to the bundle interface. The developers worked on felix for a full year and have made various improvements while retaining the original footprint and performance. The simple form will place the resource in the bundle jar with only the file name, i. Apache felix provides a foundation for creating modular and dynamically extensible applications. Before installing any bundles, it is important to understand how bundles are manually deployed into the framework. Apache felix osgi tutorial apache felix apache software. D howto package your osgi bundle with dependencies. While working on a project with holger, i learned from him that file install cannot only be used to manage bundles. The initial codebase was donated from the oscar project at objectweb. The purpose of this page is to record progress in commons of osgi enabled releases and any notes on specific issues with configuration of the osgi manifest entries.
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