15-iotivity notification service - tizen wiki...tizen/artik iot lecture chapter 15. iotivity...

Embedded Software Lab. @ SKKU

19

1

Sungkyunkwan University

Tizen/Artik IoT Lecture Chapter 15.IoTivity Notification Service

Embedded Software Lab. @ SKKU

19

2

• Notification Service– Revisit the Observe Usage in Simple Server– Scenario– Architecture

• Operations– Start or Stop Notification service– Discovery of Notification Resource– Subscription to Notification Resource– Sending Notify– Synchronization of Notification Message

• Sample

Contents

Embedded Software Lab. @ SKKU

19

3

• Observe Registration and notify

Revisit the Usage of OBSERVE in Simple Server

Create Light Value changed Watcher Thread

CheckObserverList

Send Notify

Entity Handler check observe message & push observer into observer list

1

2

3

4

Embedded Software Lab. @ SKKU

19

4

• It is possible to make notification service only with IoTivity Base API. However...– Notification service can utilize caching and monitoring features– Can configure the access policy– Topic-based Subscribe and Publish – Supports platform independent features– Prioritizes the notification– Makes fully use of IoTivity Cloud Server– etc..

Notification Service

Embedded Software Lab. @ SKKU

19

5

• D2D Notification - Consumer and Providers are in Local Area Network• D2S Notification - Consumer and Providers are connected via IoTivity

cloud

Notification Service Scenario

Embedded Software Lab. @ SKKU

19

6Notification Service Architecture

IoTivity Base

Service Components

Embedded Software Lab. @ SKKU

19

7Start or Stop Notification service

Embedded Software Lab. @ SKKU

19

8Start or Stop - Notification Provider

Callback Register

Network Monitoring Start

Consumer, Topic List Setup

Scheduler Methods Register

DiscoveryScheduler

SubscriptionScheduler

NotificationScheduler

TopicScheduler

Start Presence

Register Presence

Embedded Software Lab. @ SKKU

19

9Start or Stop - Notification Consumer

Callback Register

Network Monitoring Start

Discovery

Is provider presence

Yes

Embedded Software Lab. @ SKKU

19

10Discovery of Notification Resource

Publish Resource to Cloud

1. Access Policy2. Notification Resource URI3. Notification Message(Topic) URI4. Notification Sync URI

1. Access_all ( Accept all subscriptions )

2. Access_Check (Accept or Deny subscriptions)

Embedded Software Lab. @ SKKU

19

11

• Why the subscription message contains 3 distinct URI?

Resource Model

• Notification Message : GET (CRUDN)• Notification Sync : PUT (CRUDN)• Notification Topic : PUT (CRUDN)

Embedded Software Lab. @ SKKU

19

12Subscription to Notification Resource

If Access_all Policy, then notification subscription success

If Access_check Policy, server handle whether the consumer is subscribed

Observe !!!

Subscription Done

Embedded Software Lab. @ SKKU

19

13Sending Notify

1. Access Policy2. Notification Resource URI3. Notification Message URI4. Notification Sync URI

Embedded Software Lab. @ SKKU

19

14

• Sometimes consumer wants to read the resource synchronously

Synchronization of Notification Message

1. Access Policy2. Notification Resource URI3. Notification Message URI4. Notification Sync URI

Embedded Software Lab. @ SKKU

19

15Start & Discovery Code Sample

Access_check

Access_all

<provider>

<Consumer>

Embedded Software Lab. @ SKKU

19

16First Notify Message Sending

<provider>

1. Access Policy2. Notification Resource URI3. Notification Message(Topic) URI4. Notification Sync URINotify

<Consumer>1

2

3

4 Update Topic List and Subscription

Embedded Software Lab. @ SKKU

19

17IoTivity Cloud Connection - Provider

1

2

Request Access_Token to

Github Auth code

Auth Code String

Github send Access_Token to

Application

Using Access_Token the Application can

access the server

Embedded Software Lab. @ SKKU

19

18IoTivity Cloud Notification Service Register - Provider

1

<Resource Handle Register>

<Discovery Scheduler>

<Notification Resource Handler Register>

Embedded Software Lab. @ SKKU

19

19IoTivity Cloud Notification Service Register - Consumer

Server Discover