Alfresco Architecture

By : Noushad K [email_address]

Alfresco Architecture Eclipse & Plug-in Development What is Content Management System? Different types of CMS Features of CMS Alfresco Alfresco Architecture Alfresco Web Architecture Components Alfresco Repository Foundation Services API Support bpatech.com | [email_address] | 510-713-1018 What is Eclipse? Plug-in Development in Eclipse – a practical hand

What is Content Management System (CMS)? bpatech.com | [email_address] | 510-713-1018 A Content Management System (CMS) is a computer application used to create, edit, manage, search and publish various kinds of digital media and electronic text. CMSs are frequently used for storing , controlling , versioning , and publishing industry-specific documentation such as news articles, operators' manuals, technical manuals, sales guides, and marketing brochures. The CMS may include following contents to be managed : Computer files Images Audio/Video files Electronic Documents Web Contents

Alfresco bpatech.com | [email_address] | 510-713-1018 What is Alfresco? Alfresco is an open source Enterprise Content Management system. It's primarily implemented in Java , suited to a number of environments including J2EE and brings together the best of other open source projects in order to provide a complete set of Content Management solutions. It is not tied to any particular web browser, operating system, application server or database.

Alfresco bpatech.com | [email_address] | 510-713-1018 Alfresco concentrates on content management in areas like Document Management Records Management Image Management Web Content Management

Alfresco bpatech.com | [email_address] | 510-713-1018 Ease on Alfresco use Deploys as a complete working content management application – Runs like a typical web application ~ Application server ! User interface ! Repository ~ Persistent back-end ! Database ! File system ~ Any number of web browsers ! No client installation costs

Alfresco bpatech.com | [email_address] | 510-713-1018 Alfresco architecture : Based on Java platform (Version 1.5 onwards) Spring framework used for dependency injection & cross cutting aspects Security enforcement Multilingual functionalities on content and metadata. Alfresco has used OSS components and integrated them with Spring Full text indexing ~ Lucene database independence/persistence layer ~ Hibernate Web pages generation and navigation ~ JSF Document transformation, Meta data extraction ~ Imagic , Openoffice Templating ~ FreeMarker , XSLT Workflow ~ JBPM Scripting ~ Rhino Server Side JavaScript, PHP integration on Server side and client side

Alfresco bpatech.com | [email_address] | 510-713-1018 Alfresco Architecture : Internal API structure The API is structured around services Service = lowest API level you should interact with Node Service, FileFolder Service, Authentication Service.

Alfresco bpatech.com | [email_address] | 510-713-1018 Alfresco Web Architecture. Application server houses both the Alfresco Application & Alfresco Repository. Storage of data and content is provided by persistent back-ends such as a database or file system

Alfresco – Web Architecture bpatech.com | [email_address] | 510-713-1018 The Alfresco Repository provides a set of reusable cross-cutting Content Management services such as content storage, query, versioning and content transformation. These services may be utilized by multiple applications Support for DM - Document Management RM - Records Management WCM - Web Content Management ~ Currently only uses subset of repository services ~ Adds complex layering and versioning support for sophisticated web production Alfresco Web Architecture

Alfresco bpatech.com | [email_address] | 510-713-1018 Alfresco Components - Spring Framework

Alfresco – Web Architecture bpatech.com | [email_address] | 510-713-1018 The public interface point is the Alfresco Repository Foundation Services. Each service is exposed as a Java Interface to which a Repository client can bind and invoke without knowledge of its underlying implementation . A Service Registry lists the available services. Behind services are the implementation of components. Each service and component is configured via the Spring framework in XML configuration or 'context' files . These services may be utilized by multiple applications The configuration and binding of the Alfresco Repository Foundation Services are defined in the Spring file 'public-services-context.xml' Spring Framework

Alfresco – Web Architecture bpatech.com | [email_address] | 510-713-1018 <beans>  <bean id="ServiceRegistry" class="org.alfresco.repo.service.ServiceDescriptorRegistry" /> .  <bean id="DescriptorService" class="org.springframework.aop.framework.ProxyFactoryBean"> <property name="proxyInterfaces"> <value>org.alfresco.service.descriptor.DescriptorService</value> </property>…. 'public-services-context.xml'

Alfresco – Web Architecture bpatech.com | [email_address] | 510-713-1018 ! Simplifies architecture implementation ! Core foundation of Alfresco architecture ! Components are – Declaratively configured and bound together ! Spring AOP allows for – No implementation pollution ! Resources are abstracted (e.g. Database) Spring Framework

Alfresco – Repository Foundation Services bpatech.com | [email_address] | 510-713-1018 Alfresco Repository is responsible for the storage and retrieval of content The following 3 services makes the base: Node Service Content Service Search Service Key Foundation Services

Alfresco – Protocol stack bpatech.com | [email_address] | 510-713-1018 Alfresco Repository supports a variety of communication protocols The following 3 services makes the base: CIFS (Common Internet File System) WebDAV(Web based Distributed Authoring and Versioning) FTP Key Protocols – roles.

Alfresco – Embedded API’s bpatech.com | [email_address] | 510-713-1018 Alfresco Repository provides the following APIs. Java Content Repository (JCR) API Web Services Key API.

Application Architecture Existing components can be replaced Better implementation Better integration with existing environment No impact to clients Remove unnecessary features Lighter, possibly faster Alfresco bpatech.com | [email_address] | 510-713-1018

Eclipse bpatech.com | [email_address] | 510-713-1018 Eclipse is an open platform Designed to be easily and infinitely extensible by third parties Eclipse is written in the Java™ programming language… JFace - a UI toolkit that provides helper classes for developing UI features SWT - is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems What is Eclipse? – An Introduction

Eclipse bpatech.com | [email_address] | 510-713-1018 A typical Eclipse screen.

Eclipse bpatech.com | [email_address] | 510-713-1018 The Eclipse platform is structured around the concept of plug-ins . Plug-ins are structured bundles of code and/or data that contribute function to the system The Java development tools (JDT)- implement a full featured Java development environment The Plug-in Developer Environment (PDE)- adds specialized tools that streamline the development of plug-ins and extensions Eclipse and Plug-ins

Eclipse bpatech.com | [email_address] | 510-713-1018 Problem : Lets think we have a plain Java code to say a greeting public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World"); } } Lets delve into plug-ins Solution Tip : Since we want to say hello to the world, we need to figure out how to extend the workbench to include our greeting.

Eclipse bpatech.com | [email_address] | 510-713-1018 Think of the workbench window as a frame that presents various visual parts These parts fall into two major categories: views and editors Views provide information about some object that the user is working with in the workbench. Views often change their content as the user selects different objects in the workbench The plug-in org.eclipse.ui.workbench defines most of the public interfaces that make up the workbench API HelloWorld Plug-in

Eclipse bpatech.com | [email_address] | 510-713-1018 Problem : Lets think we have a plain Java code to say a greeting Open the New Project... wizard ( File > New > Project ... ) and choose Plug-in Project from the Plug-in Development category and click Next. Enter Plug-in details such as Name, Source folder, Plug-in Properties. Creating the plug-in project

Thank You Bpatech.com | [email_address] | 510-713-1018

Alfresco Architecture

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