This module will contain a Complex Observation Handler used to store unstructured data in the form of a complex observation to any storage systems suited for the purpose. The handler will be able to select a storage DAO according to the MIME type of the data that it's passed. So, for instance, a serialized object can be saved to a NoSQL database and large binary data can be saved to a distributed file/storage system.
It should be noted that there is no such thing in OpenMRS-core as a Complex Note as yet. We propose to get a ComplexData field included in the Note object and for the core to provide a ComplexNoteHandler interface. Any note with a non-null ComplexData property will be handled by a complexNoteHandler.
It will also provide an API for other modules to store unstructured data using a DAO that can be implemented to store this data using various storage backends. It will also provide configuration options page allowing the user to select the preferred backend that is used for storage.
Design
Implementing the ComplexObsHandler (and ComplexNoteHandler in the future)
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