Yaler WoT V20100325b
•Als PPT, PDF herunterladen•
2 gefällt mir•1,702 views
Yaler is a simple, open, and scalable relay infrastructure that allows monitoring and remote control of thousands of embedded devices from any web browser. It works by publishing devices using HTTP/1.1 POST requests and accessing them with GET requests through a relay server. The relay server reverses and forwards the connection to allow communication between devices and browsers while addressing challenges around scalability, availability, and accessibility.
Empfohlen
Empfohlen
Weitere ähnliche Inhalte
Ähnlich wie Yaler WoT V20100325b
Ähnlich wie Yaler WoT V20100325b (20)
Kürzlich hochgeladen
Kürzlich hochgeladen (20)
Yaler WoT V20100325b
- 1. Yaler – a simple, open and scalable relay infrastructure WoT 2010 Oberon microsystems Thomas (tamberg@oberon.ch)
- 2. HTTP/1.1
- 3. Enable monitoring and remote control from any Web browser https://...
- 4. … of thousands * of embedded devices. *) Customer requirement: 500’000; work in progress https://...
- 5. Ideally that just works. https://...
- 6. But in reality, the challenges are…
- 9. Yaler is a simple relay infrastructure based on Linden Lab’s Reverse HTTP.
- 10. Devices are published with HTTP/1.1 POST /device-id Upgrade: PTTH/1.0 Connection: Upgrade Host: yaler.net
- 11. … and accessed with HTTP/1.1 GET /device-id/resource Host: yaler.net
- 12. Yaler reverses the connection HTTP/1.1 101 Switching Protocols Upgrade: PTTH/1.0 Connection: Upgrade
- 13. … and forwards the request . GET /device-id/resource Host: yaler.net
- 14. The device responds with HTTP/1.1 HTTP/1.1 200 OK { "feed": [ { "entry": ...
- 15. Yaler returns the response HTTP/1.1 200 OK { "feed": [ { "entry": ...
- 16. But this poses two new challenges…
- 17. Scalability
- 18. Availability
- 19. Yaler is engineered for high performance, maintainability, robustness.
- 20. Yaler is implemented with Java’s non-blocking sockets, hierarchical state machines, and Design by Contract.
- 21. Scalability and availability can be achieved by coordinating relays with consistent hashing and a group membership service (work in progress)
- 22. Yaler is available as open source software at http://yaler.org/
- 23. This presentation is online at http://goo.gl/4uaD Thanks for your time.