What is Sling framework?

What is Sling framework?

Apache Sling is an open source Web framework for the Java platform designed to create content-centric applications on top of a JSR-170-compliant (a.k.a. JCR) content repository such as Apache Jackrabbit.

How does Apache Sling work?

Apache Sling™ is a framework for RESTful web-applications based on an extensible content tree. In a nutshell, Sling maps HTTP request URLs to content resources based on the request’s path, extension and selectors. Discussions about Sling happen on our mailing lists, see our Project Information page for more info.

What is Apache Sling in aem?

AEM uses Sling to develop web applications over Java content repository. Apache Sling is a Web framework for development of content-oriented applications.

What are sling models?

Sling Models are annotation driven java bean classes which are mapped automatically with Sling Objects (like Resource, Request….) and allow us to access JCR node property values directly into java classes via annotations. Sling Models supports both class and interface. A Sling Model is implemented as an OSGi bundle.

What is sling resource type?

sling:resourceType: It is a path, which locates the script to be used for rendering the content. Path used can be absolute or relative.

What are sling jobs?

Sling Event has a concept of Job. A Job is also an event that is guaranteed to be executed at least once with the exception being the instance processing the job crashed after the job processing is finished but before the state is persisted. This results in job consumers processing the job twice.

What is the use of Apache Felix?

Apache Felix is a community effort to implement the OSGi Framework and Service platform and other interesting OSGi-related technologies under the Apache license.

What is sling resource resolution?

Sling is a Web application framework based on REST principles. It provides easy development of content-oriented applications. Sling uses a JCR repository as its data store.

What is sling launchpad?

The Sling Launchpad Launcher can be used to embed the OSGi Framework startup in your own Java application. This functionality is implemented in the Sling Launchpad Base project. This project has the following features: Builds three artifacts: A standalone Java Application with the artifact qualifier app; e.g. org.

How does a sling model work?

In simple terms Sling Models are simple POJO classes which are mapped automatically with Sling Objects (resource, request objects..) and allow us to access jcr node property values directly into java classes.

What is sling model exporter?

Sling Model Exporter was introduced in Sling Models v1. 3.0. This new feature allows new annotations to be added to Sling Models that define how the Model an can be exported as a different Java object, or more commonly, serialized into a different format such as JSON.

How to mark Java class as a Sling model?

To mark Java class as a Sling Model use annotation Model for adapting functionality we mark Resource like adaptables from sling resource by specifying property inside Model annotation. It’s also possible to adapt from a SlingRequest. For populating properties of a sling model, we use a Inject annotation. What can be injected?

How to create a Sling model in Adobe AEM?

To create a Sling Model you should mark your class as adaptables from resource & mark fields which should be populated from the resource properties using Inject annotation & don’t forget to create getters for your fields. data-sly-use statement is used to initialize sling model in an HTL template.

Do you need to create bundle for Sling model?

To start using Sling Model you need to create a separate bundle for Sling Models, is not required but recommended & specify Sling-Model-Packages, a header in the bundle manifest. When you use Inject annotation sling will execute all available Injectors into values are set.

When did Israel start using the David’s sling?

The Israeli Air Force took delivery of its first David’s Sling units in 2016. 15 Following its delivery, Israel successfully conducted a fifth test of the system on January 25, 2017, which was successful. 16 Israel formally inducted the David’s Sling system into service in March 2017. 17