What is JSR 283?

Content Repository API for Java (JCR) is a specification for a Java platform application programming interface (API) to access content repositories in a uniform manner. The specification was developed under the Java Community Process as JSR-170 (Version 1), and as JSR-283 (version 2). The main Java package is javax.

What is Apache Jackrabbit used for?

Apache Jackrabbit is a fully featured content repository that implements the entire JCR API. The Jackrabbit project was started when Day Software, the JSR-170 specification lead, licensed their initial implementation of the JCR reference implementation.

What is JSR-170?

JSR-170 specifies a Level 1, a Level 2 and a set of advanced repository feature blocks. Jackrabbit is fully JSR-170 compliant and therefore supports Level 1, Level 2 and all the optional blocks.

Is Apache Jackrabbit open source?

Apache Jackrabbit is an open source content repository for the Java platform. JCR specifies an API for application developers (and application frameworks) to use for interaction with modern content repositories that provide content services such as searching, versioning, transactions, etc.

What is a Java repo?

Java repositories are commonly known as JPA based repositories used under JAVA spring framework. Repositories define a new elegant method of storing, updating, and extracting the data stored from JAVA applications in the backend. As the name suggests JPA helps in persisting the java objects in relational databases.

What is Oak in AEM?

Apache Jackrabbit Oak is an effort to implement a scalable and performant hierarchical content repository for use as the foundation of modern world-class web sites and other demanding content applications. It is the successor to Jackrabbit 2 and is used by AEM 6 as the default backend for its content repository, CRX.

What is the difference between a jack rabbit and a rabbit?

Learn. Despite the name, jackrabbits are actually hares, not rabbits! Other physical differences are hares are larger in size compared to rabbits as well as have longer ears and hind legs. Hares can jump a distance of about 20 feet in one leap and can run at speeds up to 30 miles an hour.

What is difference between JpaRepository and CrudRepository?

Their main functions are: CrudRepository mainly provides CRUD functions. PagingAndSortingRepository provides methods to do pagination and sorting records. JpaRepository provides some JPA-related methods such as flushing the persistence context and deleting records in a batch.

How do you write a repository?

Create a repository

1. In the upper-right corner of any page, use the drop-down menu, and select New repository.
2. Type a short, memorable name for your repository.
3. Optionally, add a description of your repository.
4. Choose a repository visibility.
5. Select Initialize this repository with a README.
6. Click Create repository.

How do I get rid of the oak index in AEM?

To delete an existing Oak Index, create an Ensure Definition with the same node name as the Oak Index to delete, and add the property @delete=true . If no index can be found to delete, this will note it in the log and continue.

What is sling AEM?

Sling Models are annotation driven Java “POJO’s” (Plain Old Java Objects) that facilitate the mapping of data from the JCR to Java variables, and provide a number of other niceties when developing in the context of AEM.

Which is the best JSR-283 compliant content repository?

ModeShape is another open source JCR implementation that supports JSR-283. Jahia, Hippo CMS and Magnolia are Enterprise Content Management systems built on the JCR API, using Jackrabbit as its repository by default, but able to plug in any other JSR-170 certified repository implementation.

What kind of query language does JSR 283 support?

JSR 283 compliant implementations must support a standardized form of SQL for queries and a query object model QOM. JSR 283 deprecates the XPath query language defined in JSR 170.

Is the Apache Jackrabbit reference implementation compatible with JSR 283?

JSR 283 deprecates the XPath query language defined in JSR 170. The Apache Jackrabbit reference implementation of JCR also supports the integration of the Apache Lucene search engine to give full text searches of data in the repository.

What are the goals of the JSR process?

Since this JSR represents an enhancement of JSR-170, the same general goals apply to this JSR as to JSR-170 (from the JSR-170 proposal): The aim is to produce a content repository API that provides an implementation independent way to access content bi-directionally on a granular level.