What is the use of OSGi in AEM?
OSGi is a fundamental element in the technology stack of AEM. It is used to control the composite bundles of AEM and their configuration. OSGi “provides the standardized primitives that allow applications to be constructed from small, reusable and collaborative components.
How do I install OSGi bundle in AEM?
How to Deploy a Bundle to AEM. Display Data on JSP from OSGI Service….Deploy the Bundle to AEM :
- Click Install/Update on Top-right corner to open bundle upload window.
- Select check box for start bundle, to start bundle immediately.
- Upload the jar file and click install.
What is a service in AEM?
What is a Service? An OSGi service is a java object instance, registered into an OSGi framework with a set of properties. Any java object can be registered as a service, but typically it implements a well-known interface.
What is PID in AEM?
Both data stores and node stores can be configured using OSGi configuration. Each OSGi configuration is referenced using a persistent identifier (PID).
What is OSGi component in AEM?
An OSGi service is a Java class or service interface, along with a number of service properties as name/value pairs. The service properties differentiate among different service providers that provide services with the same service interface.
What is OSGi container in AEM?
OSGi facilitates creating and managing modular Java components (called bundles) that can be deployed in a container. As a developer, you use the OSGi specification and tools to create one or more bundles. OSGi defines the lifecycle for these bundles. It also hosts them and supports their interactions in a container.
What are OSGi bundles in AEM?
OSGi stands for Open Service Gateway initiative. It is a Java framework for developing and deploying modular software programs and libraries. OSGi has two parts. The first part is a specification for modular components called bundles, which are commonly referred to as plug-ins.
What is OSGi framework?
The OSGi (Open Service Gateway Initiative) specification is a Java framework for developing and deploying modular software programs and libraries. The framework was originally managed by the OSGi Alliance, an open standards organization.
What is OSGi?
What does OSGi stand for?
Open Service Gateway Initiative
The OSGi (Open Service Gateway Initiative) specification is a Java framework for developing and deploying modular software programs and libraries.
How use OSGi service in sling model?
A Sling Model is implemented as an OSGi bundle. A Java class located in the OSGi bundle is annotated with @Model and the adaptable class (for example, @Model(adaptables = Resource….Sling Models Annotations:
| Annotation | Description |
|---|---|
| @Model | declares a model class or interface |
| @Inject | marks a field or method as injectable |
Why is OSGi used?
What is difference between jar and OSGi bundle?
There is basically no difference. A JAR is a bundle and a bundle is a JAR, the formats are identical. However, a useful bundle requires OSGi metadata in its manifest so that an OSGi framework can manage the visibility of classes between bundles.
What is the point of OSGi?
OSGi allows for multiple versions of a Java package to be present at runtime simultaneously. This allows scenarios whereby the team working on module A need version x of some library, and the team working on module B need version y of some library (and x and y are incompatible).
What is @model annotation in AEM?
@Model annotation provides ‘defaultInjectionStrategy’ attribute to indicate if the injected fields in a sling model should be required/optional. @Model(adaptables = Resource.class, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
What is OSGi bundles in AEM?
An OSGi bundle is a Java™ archive file that contains Java code, resources, and a manifest that describes the bundle and its dependencies. The bundle is the unit of deployment for an application. This article is meant for developers wanting to create OSGi service or a servlet using AEM Forms 6.4 or 6.5.
Who uses OSGi?
Who uses OSGi? 11 companies reportedly use OSGi in their tech stacks, including Liferay, Business Filemanager, and SYSTHEMIS AG.
Why do we need OSGi?
How use OSGi service in Sling model?
What is the OSGi implementation of AEM?
The components and services can be dynamically installed, activated, deactivated, updated and uninstalled. The OSGi specification has several implementations, for example, Equinox, Knopflerfish, and Apache Felix. AEM uses Apache Felix implementation.
What is an OSGi component?
OSGI components are Java objects managed by the OSGI environment, by its part called Service Component Runtime or SCR. Components are described in the XML descriptors of their bundles. A component can be configured using properties- will review that in next part. In the Java code one uses annotations to declare and describe components.
What is the best way to work with OSGi services?
In general, using a component framework is the easiest way to work with OSGi services because the framework will manage the binding to the services that we want to consume.