Position Manager in EML-CTS

Background:

    
EML-CTS is an open source implementation of the Common
      Transactive Services and is at
      https://github.com/EnergyMashupLab/eml-cts .

    
 The code may be viewed as an application profile, guiding
      definition and evolution of CTS message-based interactions.

    
The Position Manager is described in the project wiki at
      https://github.com/EnergyMashupLab/eml-cts/wiki/Position-Manager :

    

      
        Position Manager
        
See packages org.theenergymashuplab.cts.controller.payloads,
          .model, .dao, and .repository for details.

        
The Position Manager uses JPA to store its information. The
          REST API for the PositionManager RestController is

        
          
POST: /position/{positionParty}/add adds a position for a
            particular Party and time interval, creating a database row
            if not present.

          
GET: /position/{positionParty}/getPosition retrieves the
            position for a specific Party and time interval

        
        
          
        Position Manager Model
        
PositionManagerModel represents the database table.

        
          
        Position Repository
        
PositionRepository contains all the native SQL queries.

      
      The notion is that previous purchases and sales are reflected in
      summary in the position for a particular instrument (time
      interval, implicit product) and can be used to determine what's
      already committed and compare to what's needed.

    
In other words, the user/building/controller using the position
      manager can say "I need 20 kWh in this time period" and the User
      Agent could say "you already have bought 30, so I'll sell 10", or
      "you have 10, so I'll buy another 10".

    
This is not presently used in the EML-CTS implementation (source
      code at https://github.com/EnergyMashupLab/eml-cts) but is planned
      for optional future use.

    
Thanks!

    
bill cox

    

    
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William CoxÂ

      
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