immerse'16 introduction to adobe experience manager back end

© 2016 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.© 2016 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.

A virtual developer conference for Adobe Experience Manager

Introduction to Back End Development in Adobe Experience ManagerVarun Mitra | Partner Training Instructor

© 2016 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential. 3

Maven and Archetypes1. Maven simplifies and provides an uniform build process.2. Maven makes use of a Project Object Model(POM)3. pom.xml file defines Project Information, Build Environment Settings and

Relationships.4. A Maven Archetype is a Project Template5. Maven Archetypes can be used with AEM Sling Plugin for Eclipse.


1. SCR Annotationa. @component: A JAVA class file that can be stopped or started.b. @service: An extesnion of component, can be looked up using its interface name.c. @reference: Defines References to the other services.d. @properties: Defines properties which are made available to the component.

2. All services are components.3. @component annotation is mandatory in order to use the rest.4. Use @component(metatype=true) to create custom OSGI configurations.

Introducing OSGI


Introducing Sling


Sling Servlets Sling Servlet API extends HTTPServlet class Use @slingServlet annotation to define a Sling Servlet Avoid @slingServlet(paths=‘/bin/foo/bar’) Use @slingServlet(resourceTypes=‘/company/foo/bar’, selectors=“{‘foo’,’bar’}”) Default Servlet Execution path - /bin Define additional execution path with the help of Apache Sling Servlet/Script Resolver and

Error Handler


Sling Scheduling Scheduler can implement the Runnable API or make use of the Scheduler Interface. Scheduler make use of a CRON expression to execute periodically.

Sling Models Provides a framework for development Annotation driven POJOs OOTB works with: SlingBindings OSGi services request attributes

Adaptable to multiple objects Resource and SlingHttpServletRequest

Use annotations to handle inputs


Session Management Use loginService(String subServiceName, String workspace) for providing Super User Access

to the repository. Use ResourceResolver API to obtain the logged in user session Do not use repository.loginAdministrative or repository.login(userid, password)


Query Optimization Use sling:Folder or oak:Unstructured when large number of sibling nodes are

expected and ordering is not required. Use nt:unstructured and sling:OrderedFolder otherwise.

Avoid Queries in components. Use node based API’s if the prior knowledge of the location of data is

available. All queries are converted to SQL2 before being run, however the overhead of

query conversion is minimal. Use Explain query tool to understand how a query would be executed. Enable debug on Query API’s to further analyse the Query Performance: org.apache.jackrabbit.oak.plugins.index org.apache.jackrabbit.oak.query com.day.cq.search


Q&A10

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LinkedIn: Varun mitra

immerse'16 introduction to adobe experience manager back end

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