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Multitenancy Status Quo (August 2014)

Resources and discussion on MultiTenancy in Sling from the last months:

Definition of terms

Definition of terms used in this wiki page

  • Multitenancy
    • The generic description is found in Wikipedia: http://en.wikipedia.org/wiki/Multitenancy
    • The main question is: what exactly is a "Tenant" in context of Sling, and what are the requirements for customization etc. This wiki page should help to shape the answers.
  • Content
    • Content accessible via Resources in the Resource Hierarchy (in most cases in a JCR content repository) which belongs to each tenant
    • Is stored by convention below /content/*, but this is not mandatory
    • May be associated via resource types with scripts and components globally available, or tenant-specific custom scripts
  • Configuration
    • Configuration that customizes the system and application behavior
    • Either globally, or on a more fine-granular level (e.g. per tenant)
    • OSGi configurations are part of it, but there may be other configuration as well
  • Scripts
    • Scripts like JSP/ESP/Sightly/Java files stored as resources in the resource hierarchy that are used by Sling to render the views of the resources
    • Ca be both globally available (stored in /libs or /apps), or tenant-specifc
  • Bundles
    • Java bundles containing services deployed to the OSGI runtime
    • Usually bundles are always global, not tenant-specific. But configuration may be needed to be tenant-specific as well, which is currently only possible if the bundle implementation supports it.
  • Site
    • A site is a collection/subtree of resources of the content that forms a logical unit used to publish a CMS-based site
    • The root of the subtree may be the homepage, with the subnodes forming the content hierarchy of the site
    • Usually there is a need for site-specific configuration

Scenarios

After reviewing the discussions in the mailing lists there seem to be two major usecases that have the need for a Multitenancy support. Although there have some shared requirements, both have a set of special requirements with some complexity to implement that are not so relevant for the other.

// TODO

Usecases

// TODO

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