Day CQ5?

What is Day CQ?

      Day's CQ4 platform allows you to build compelling content-centric application that combine Web Content Management, Workflow Management, Digital Asset Management and Social Collaboration.


Prerequisites for Developing with CQ:
    

The following skills are recommended before starting with CQ:
1. Basic knowledge of web application techniques, including:
       a. The request-response cycle
       b. HTML
      c. CSS
      d. JavaScript
 2. Working knowledge of CRX(Content Repository Extreme); including the content explorer
 3. Basic knowledge of JSP (Java Server Pages), with the ability to understand and modify simple JSP example.

CQ5 Platform Architecture:


CQSE - CQ Servlet Engine
a. J2EE Servlet engine
b. 3 Webapps loaded
CRXDE Lite
Browser-based IDE
Launchpad
Sling application framework
Provides access to the Websites, Digital Assets, Inbox, tools, Packages and so on..

CRX
JCR
     Servlet Engine: Acts as the server within which each CQ instance runs as a web application.
     Any servlet Engine supporting the servlet API 2.4 can be used.


CRX:
1. General purpose repository
2. Allows for separation of application and content
3. content is available through a standardized API
a. JCR 283
b. JCR API
Node node.addNode("JCR");
Node node.getnode("JCR");
Node node.setProperty("opinion","excellent and recommended");
Node node.getProperty("opinion").getString();



JCR:
1. JSR 283
2. Key principles
a. Common programmatic interface to content repositories
b. API not tied directly to underlying architecture, data source, or protocol
c. Content organization in repository model
Hierarchical modeling
3. Reference implementations
a. Apache Jackrabbit
c. Jackrabbit.apache.org
4. Content Repository Extreme (CRX)
Day implementaion of JSR 283


Apache Sling:
==========
Apache sling is a content access framework providing a RESTful way to access and manage data stored in a
JCR (CRX/Jackrabbit/other).

Apache Sling is not specific to any JCR implementaion and has been tested with various JCR implementaions.
Sling provides a Resource API to make it easier to work within a JCR and manage resources.

Key principles:
a. Web application framework
b. Content-oriented (JCR-based) application development
c. REST-based


Sling:
1. Maps content objects to components
2. Server-side and AJAX scripting support
3. Can be used with a range of scripting languages
JSP, ESP, Ruby, Scala
========================================================================
CMS application - enables the creation, management, and control of content.

Workflow engine - controls the processing of workflow instances
-- Workflow instances often control the process of generating and publishing content


WCM Application:
1. Components - independent, reusable pieces of content rendering logic (code)
2. Widgets - basic elements that implement a specific user function
oftern manifested as a dialog box that enables entering or editing of a piece of content
3. sling - component framework that provides the underlying mechanisms for rendering content.



Author Vs Publish Instances:
------------------------------
  Authors: Developers create Templates & pages
Publish: Visitors request Pages

Available Interfaces:
====================
1. CQSE Administration Interface
2. CRX Interfaces
3. Apache Felix Interface


CQSE:  http://localhost:4502/admin
CQSE Administration:
1. Used for stand-alone installation
Default CQ5/CRx installation uses CQSE
2. Used to manage:
a. web applications
b. Connectors
c. Password
d. System information