The Rendering Manager is the core controller between the datastores, context, and renderers.

Functional Requirements

• Obtains DataSource and GridCoverageExchange objects from Layer Manager
• Reads Context and creates Renderers for the entries in the Context
• Creates decoration renderers, ie legend renderers
• Creates functional renderers, ie editing renderers.
• Creates virtual renderers, ie renderers derived from other renderers.
• creates layered renderers, ie renderers that contain multiple renderers that compete to complete a request
• Handles Layer visibility change events
• Handles layer selectability events

Non-functional

• Decide which services to use for rendering and reprojection
  • For example, for display it may be quicker to have a WMS render an image. However, during editing it will likely be more useful to access the WFS and do the rendering on the client.
• Provides low-level interface for plug-ins

Notes

• WMS requests must be batched into one renderer