Migrating an application from Sling 3 to Sling 5 - II

By meamitava - JCRLead | Posted on 2009-11-08 21:30

The last post on migration dealt with the basic steps of the transformation process. Next job is to export the data from the existing application on Sling 3 and exporting the same to the one running on Sling5. For import and export of data jcr-explorer may be used. (This is a web-based explorer application to administer and maintain a JSR-170 compliant JCR repository like Apache Jackrabbit. It allows e.g. to browse nodes, edit properties, make queries and use optional features like versioning,

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HTTP Servlet as OSGi Service in Apache Sling Framework

By pulak - JCRDev | Posted on 2009-09-21 03:42

An OSGi (Open Service Gateway Initiative) 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. Generally, services is the preferred method, bundles should use to communicate between each other and the client of a service is always an OSGi bundle (is normal jar components with extra manifest headers). So, you do use java interface mechanism when exposing OSGi Service to be used by other bundles. Here is t

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JCRDev has an edge

By nambuj - JCRLead | Posted on 2009-05-11 05:37

 When I browse through net, I get many articles which talk about JCR, CMIS, Jackrabbit, REST, etc; but when I look for a place where I can get all the information at a single place, I don’t get any. JCRDev provides the only platform where we can get all content under one umbrella. We can read experiences of developers from JCR world in Blog section while we can interact with them in Forums. News section updates on recent developments while Wiki gives an opportunity to create collab

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Jackrabbit Architecture

By bhatasuj - JCRDev | Posted on 2009-04-03 14:26

The general architecture of Jackrabbit can be described in three Layers: A Content Application Layer, an API Layer and a Content Repository Implementation Layer. Content Applications Content Applications interact through the JSR-170 API with the Content Repository Implementation. There are numerous applications that are available for JSR-170 repositories, some of them are very generic (like a WebDAV server) other applications can be very specific and make use of the content repository

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The Apache Sling Framework

By pulak - JCRDev | Posted on 2009-04-02 12:45

Apache Sling is a Web application framework for java platform based on REST principles that provides easy development of content-oriented applications. Sling uses a JSR-170 compliant JCR repository, such as Apache Jackrabbit, to provide storage, presentation, and management of data. Sling started as an internal project at Day Software, and entered the Apache Incubator in September 2007 at The Apache Software Foundation (ASF). Sling is being developed using Apache Felix as the OSGi framework (i

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Introduction to OSGi and Felix

By thaneshk - JCRLead | Posted on 2009-04-01 20:03

What is OSGi?Open Services Gateway Initiative (OSGi) defines architecture for developing and deploying modular applications and libraries. It is also known as the “Dynamic Module System for Java”.OSGi containers allow you to break your application into individual modules and manage the cross-dependencies between them with:• services implemented within the container• a contract between the container and your applicationThese services and contracts provide an architecture which enables ind

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How Sling, OSGi, Felix, REST and Jackrabbit are related with respect to CQ5?

By thaneshk - JCRLead | Posted on 2009-04-01 20:02

Communiqué (CQ) 5 is a modular content management portfolio of products that incorporates Web Content Management, Digital Asset Management, Social Collaboration, Portal Management and Workflow. CQ5 is a product of Day Software. The product has been completely redesigned from Day 4.x.CQ5 is built using Sling, a Web application framework based on REST principles that provides easy development of content-oriented applications. Sling uses a JCR repository, such as Apache Jackrabbit, or Day’s CRX,

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The Journey of JCRDev

By nambuj - JCRLead | Posted on 2009-03-16 16:59

When we started building a web application on Sling framework we had a herculean task in hand. We knew from very first day that it’s not going to be an easy job as there’s not much help available on this. First thing we wanted to do is to understand the overall architecture. We started digging down and we encountered several other new terms like OSGi, Jackrabbit, Felix, etc. Our purpose was to understand each and every terminology used in and around this framework. The process of

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