The core osgi service platform has a layered architecture, and is designed to run on a variety of standard java profiles. An extended distributed osgi architecture for implementation. Apache cxfs distributed osgi framework, cxfdosgi, will be used with eclipses equinox osgi framework for developing and deploying the service bundles. Soa, java, tomcat, spring framework, oracle, mysql, servlets, jsp, graph, osgi. Feb 16, 2009 the claim we are making is that carbon goes beyond just the plain osgi plug model and defines important models for soa, just as eclipse defines how to plug components into a tool architecture. Serviceoriented architecture is a clientserver design approach in which an application consists of software services and software service consumers also known as. Liferay architecture understanding the inside of liferay jorge ferrer vice president engineering. Both implementations are followed the osgi standard specification. What aspects of osgi make it suitable for serviceoriented.
Service oriented architecture soa refers to building systems that offer applications as a set of independent services that communicate and interoperate with each other effectively. This article introduces you to the basic concepts behind the software framework specified by the osgi alliance. And this time again, very small and clean implementation with two injectable dependencies,org. The osgi specification describes a modular system and a service platform for the java programming language that implements a complete and dynamic component model, something that does not exist in standalone javavm environments. The goal of the swordfish project is to provide an extensible soa framework based on the proven eclipse equinox runtime technology. Soda is an adaptation of a serviceoriented architecture soa which integrates business systems through a set of services that can be reused and combined to address changing business priorities. Fremantle and weerawarana on wso2s new osgibased soa.
A set of components which can be invoked, and whose interface description can be published and discovered w3c. Service layer osgi services and the service registry osgi services enable a singlejvm service oriented architecture osgi services follow a publish, find and bind paradigm. Fremantle and weerawarana on wso2s new osgibased soa platform. Open source frameworks such as hibernate, spring and the alfresco content management system are presented, too.
Its a good match for many systems but the book implies at least thats my inference it should always be your goal. A closer look reveals that you can break this service down into smaller chunks. Osgi specification implemented by several vendors popular vendors equinox and apache felix. The osgiopen services gateway initiative framework provides a dynamic modular architecture which has been used in many applications such as eclipse equinox, apache felix, etc. The following is a short list of highlights of sling. You do not need to dynamically load code because all those yesterdays components that have b.
Prior to wide industry acceptance, osgi had a previous life as the open services gateway initiative a software library specifically designed for devices with embedded java engines. Separation of business logic from the details of its service implementation. Java application architecture is not only about isolated work, it is a complete and constant effort to guide teams. Osgi the sling application is built as a series of osgi bundles and makes heavy use of a number of osgi core and compendium services sling api to implement content based web applications with sling, an api has been defined, this extends the servlet api and provides more functionality to work on the content. Todays approach of small services being deployed in containers makes the classic soaosgi approach pretty much obsolete imho. Serviceoriented architecture for home networks citeseerx.
Osgi introduces the notion of a bundle as a modular unit, and the platform architecture is based upon bundles as the unit of deployment. Osgibased smart home architecture for heterogeneous. Access rights manager can enable it and security admins to quickly analyze user authorizations and access permissions to systems, data, and files, and help them protect their organizations from the potential risks of data loss and data breaches. Serviceoriented architecture is a clientserver design. To me, serviceoriented architecture is not just about sticking an esb in the center of your organization. Executing operations atomically service methods happen within a transaction based on spring servicebuilder generates annotations. Sca can be used to describe a larger soa design across multiple nodes. Components communicate locally and across the network through services an application in this context represents the functionality desired by the organization.
Before it walks you through eighteen patterns that will help you architect modular software, it lays a solid foundation that shows you why modularity is a critical weapon in your arsenal of design tools. Isolation total control over the packages you expose and consume dynamism bundles have a life cycle independent of the virtual machine dependency management. This article describes a stepbystep approach to developing and deploying web service components as osgi bundles. We propose a service resolving bundle to complement. The main contribution of this paper is the establishment of a middleware solution incorporating osgi into android software development platform, which provides a servicearchitecture for androidbased applications. Each bundle is a tightly coupled, dynamically loadable collection of classes, jars, and configuration files that explicitly declare their external dependencies if any. Such applications may originate from different vendor, platform, and programming language backgrounds, making successful integration a challenging task. Todays approach of small services being deployed in containers makes the classic soa osgi approach pretty much obsolete imho.
Pdf service oriented framework for industrial automation systems. Challenges growing engineering team on a monolithic. Osgi technology is a set of specifications that define a dynamic component system for java. Component based architecture helmut petritsch 314 introduction soa is a buzzword and topic for many discussions in nearly every professional journal and conference. I am currently working on a pretty large java 6 application where we are looking to split some of our functionality out into a service oriented architecture.
Serviceoriented architecture soa architectural style focus on how different business functions of a system work with each other. Kai hackbarth osgi defines a javabased modular software architecture that follows the principles of a serviceoriented architecture soa. It utilizes apache cxf and osgi to achieve this goal. Applications or components, coming in the form of bundles for deployment, can be remotely installed, started, stopped, updated, and uninstalled without requiring a. Highlights with the development of home network and service applications, different protocols and transmission modes are proposed. Nine years ago, when we started working on the osgi specifications, we used the word service to describe the object that acted as a conduit between bundles. Their decision to use osgi to create a rich client platform that supports plugin architecture was the first step toward the resulting ecosystem we know today.
Osgi framework architecture three conceptual layers. However, osgi, a middleware technology with its original purpose is to build service gateways in the servercentric architecture 2, that provides the ability to. Java application architecture lays the foundation youll need to incorporate modular design thinking into your development initiatives. There may be few features vendor specific but most of the implementation as per osgi specification. Basically, a bundle is just a plain old jar file, whose manifest. It seems that the primary soa framework for the application space is osgi and i have been looking into felix and knopplerfish but i wanted to make sure that this isnt my only option. An introduction to osgi architecture tutorial developer. We can develop osgi application which target to anyone of these implementations. Osgi technology is a component integration platform with a serviceoriented architecture and lifecycle capabilities that enable dynamic delivery of services.
Pdf serviceoriented smarthome architecture based on osgi. Osgi iot expert group and osgi architecture may 2018 osgi services using services is a powerful way for bundles to collaborate services advertise their public interfaces this provides a typesafe way to identify what a service does services can be registered and unregistered dynamically clients can be noti. The framework is designed to be complemented by additional open source components such as a service registry, a messaging system, a process engine etc. Today, service oriented architectures soa are hot and every software vendor seems intent on confusing a muddy picture even further by bringing their products under this wide umbrella. Osgi problems osgi is quite low level but there is some work to hide the complexity spring dm spring dynamic module multiple vendors containers spring dm server, glass. An osgibased semantic serviceoriented device architecture. The prentice hall serviceoriented computing series from thomas erl aims to provide the it industry with a consistent level of unbiased, practical, and comprehensive guidance and instruction in the areas of serviceoriented architecture, serviceorientation, and the expanding landscape that is shaping the realworld serviceoriented computing. Osgi open service gateway initiative is a java framework for developing and deploying modular software programs and libraries. Architect and developer in soa business integration organisation at sun.
You need a gps service that tells you where the car is located. Service component architecture sca is a software technology used for composing applications that follow service oriented architecture soa principles. Development of a low cost industrial automation and control system framework based on serviceoriented architecture soa using osgi framework for. These capabilities greatly increase the value of a wide range of computers and devices that use the java platform. If you want to know more on osgi, it is not exactly the book youre looking for except that the examples are presented with osgi osgi in action is the reference. Architecture, java, soa, osgi the main subject of these entries is the service oriented architecture soa using jee, web services and osgi. Osgi technology open services gateway initiative obsolete set of speci. So use ds for osgi services when using osgi as an implementation type for sca. Osgi is a java framework for developing and deploying modular software programs and libraries. Business process server no gimmicks gotchas full 24x7 support training and consultancy hear. A simple web application client is developed to access the distributed service bundles.
Csci 5828 spring 2010 foundations of software engineering. The second part of this tutorial covers the service oriented architecture soa in osgi and service bundle development. The osgi framework is made up of three layers module, lifecycle, and services that define how extensible applications are built and deployed. The osgi open services gateway initiative framework provides a dynamic modular architecture which has been used in many applications such as eclipse equinox, apache felix, etc. Request pdf an extended distributed osgi architecture for implementation of soa with the development of modern network technology, the distributed construction is considered to represent the. Three soa case studies software architecture conference. These specifications enable a development model where an application is composed of several components which are packaged in bundles. Module defines how a module, or a bundle in osgispeak, is defined. Developing serviceoriented architecture applications with osgi dr mark little, kevin conner red hat, keith babo sun, alexandre alves bea. Architecture, java, soa, osgi a soa journey with java and.
Sep 04, 2007 nine years ago, when we started working on the osgi specifications, we used the word service to describe the object that acted as a conduit between bundles. The claim we are making is that carbon goes beyond just the plain osgi plug model and defines important models for soa, just as eclipse defines how to plug components into a. There are more digital devices and home appliances which compliance to the protocols. Richard nicholson, paremus ceo, president of the osgi alliance in writing this book, kirk has done the software community a. Application provides a manual control for igss station 5. Pdf an osgibased semantic serviceoriented device architecture. Osgibased smart home architecture for heterogeneous network. Oracle eventdriven architecture suite, cep, soa, and web 2. It is a development model that comes with many advantages including. Understanding how osgi framework works is useful for developing eclipse plugins and many other molecularity applications.
Osgi open system gateway initiative named, versioned bundles dependency management explicit importsexports builtin security dynamic independent industry standard has become popular in cell phone system management and other areas these are exactly the. It promotes a loosely coupled collaboration mechanism between modules, which it calls services. Developing serviceoriented architecture applications with osgi. We design and implement a serviceoriented smarthome architecture to integrate protocols which are popular on osgi framework. Eventdriven architecture suite, cep, soa, and web 2. Developing serviceoriented architecture applications with. Since 2005 a complete soa platform available under the apache license wso2 carbon osgibased runtime including. Architecture, java, soa, osgi a soa journey with java. Opinions differ from some technical rubbish to the technology of the future. On modular architectures on software architecture medium. Soa composable processes cbm component business modeling development infrastructure management service oriented architecture soaservice oriented architecture soa software development integration infrastructure management greater flexibility required from business models and the supporting it architecture flexible business flexible it. The osgi specifications provide the platform for universal middleware and are. Pdf the architecture of a conventional smart home is usually servercentric and thus causes many problems.
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