1. The Ptolemy Project Closing Remarks
Edward A. Lee
Robert S. Pepper Distinguished Professor
Tenth Biennial Ptolemy Miniconference
October 16, 2015
Berkeley, CA, USA

2. Accessors
An accessor is a local proxy for a (possibly) remote device or service.
It has an actor interface with (possibly time-stamped) streaming inputs and outputs

3. Accessors in the RoboCafe at the DARPA Wait, What? Demo
[Brad, Pat, UMich]
Swarmlet host (in this case, CapeCode, based on Ptolemy II) integrates multiple accessors and distributed swarmlets under an actor model, which emphasizes streaming data.
Task 2.2: Programming Models and Modeling Formalisms
TerraSwarm

4. Accessors in the RoboCafe at the DARPA Wait, What? Demo
Battery Monitor
Lucy
Task 2.2: Programming Models and Modeling Formalisms
Wait, What? exhibit floor, St. Louis, MO, September, 2015
Customer
Obstacle
TerraSwarm

5. Accessors in the RoboCafe at the DARPA Wait, What? Demo
Integration of swarmlets with other networked swarmlets (in this case, a battery-state monitor) is handled by network interface accessors (in this case, a WebSocketServer).
Integration of swarmlets with foreign services (in this case, ALPS localization from a mobile phone) is handled by network interface accessors (also a WebSocketServer in this case).
Task 2.2: Programming Models and Modeling Formalisms
Orchestration of accessors is governed by a timed discrete-event (DE) model of computation with strong formal properties.
TerraSwarm

6. Accessor Architecture Today Version 0.1a
Edward A. Lee
6/27/2018
Accessor Architecture Today Version 0.1a
Accessor Interface
Accessor Interface
These hosts are functional, but diverging. Effort is needed to bring them back into alignment.
implements
requires
Accessor
Interface + JavaScript
implements
Module API Definition
CommonJS + Text
runs in
Accessor Host
Nashorn + Ptolemy II
runs in
Give demo of random image filter.
Accessor Host
Nashorn + Java
Module Implementation
JavaScript + Java (Nashorn)
Accessor Host
Node.js
Module Implementation
JavaScript (Node.js)
Accessor Host
Browser
Module Implementation
JavaScript
TerraSwarm

7. ON TO 2017! AND BEYOND!