SIF 3.0 Concepts PowerPoint Presentation, PPT - DocSlides

SIF 3.0 Concepts

Workshop Idea13

Joerg Huber

12 November 2013

SIF3 Workshop Idea2013: SIF 3.0 Concepts

2

Overview

Terms and Concepts of SIF 3.0

REST (what about SOAP), XML, JSON

Direct and Brokered Zones

Immediate and Delayed Responses

Event

Processing (Single Source of Truth

)

Bulk Create, Update & Delete Operations

Reduced ‘

Chatiness

’

SIF 3.0 Infrastructure Documentation

12 November 2013

SIF3 Workshop Idea2013: SIF 3.0 Concepts

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REST, SOAP, XML, JSON

Current SIF 3.0

Release

uses

REST

as transport and

XML

representation of Data Model (infrastructure and data dictionary)

SOAP is planned. SIF Association is looking for volunteers to help on this part.

JSON is planned but not officially supported, yet.

Mapping between XML and JSON required

JSON has ambiguities (i.e. Array or not Array)

JSON is less bound by standards which causes some issues: i.e. Encryption of payload

There is a separate session in the workshops that addresses the JSON issues. See Confluence on this topic:

http

://kb.nsip.edu.au/display/SATWVC/SIF+3.0+and+JSON

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Direct Zone

NEW Concept in SIF 3.0

Peer-To-Peer connection not involving middleware.

Can be used from web-applications to retrieve and persist data directly from/to a given application.

Can be used by mobile applications (most likely using REST) to connect directly to an application.

Sub-Set

of SIF 3.0 Interfaces need to be implemented

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Direct Zone cont.

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Brokered Zone

What was known as a ZONE involving a ZIS in SIF Classic.

The Brokered Zone

securely

connects N clients to a dynamically changing list of M Data Entity and / or Functional Services through a centrally secure, separate and discrete Message Broker.

Clients of a brokered Zone can implement SOAP and/or

REST, depending what the broker supports.

Broker

may implement

SOAP

and/or

REST

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Brokered Zone cont.

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Immediate & Delayed Response

Delayed Response is what is known in SIF 2.x as

asynchronous

response.

This concept remains in SIF 3.0

Immediate Response (

synchronous

) is where the requestor of the data keeps the connection open until a response is available.

Immediate Response is largely a NEW concept in SIF 3.0

Direct Zone: Commonly used

Brokered Zone: Less common when it comes to requesting data through a query

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Service Types

Infrastructure Services

Queues

Alerts

Namespace Registry etc.

Data

Entity Service

is a service for a given SIF Object (i.e.

StudentPersonal

,

SchoolInfo

) => CRUD

C

reate

R

ead (Query)

U

pdate

D

elete

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Service Types cont.

Functional

Services

Execute

Style (Jobs)

:

i.e

. End-of-Year

Rollover.

Student Locator

Report Style

:

Provide a ‘View’ of multiple Entities in one

Object

.

Composite Object Services

Object made of part of other object

Relationship Services?

Next release?

…/

StudentPersonals

/{id}/

TeachingGroups

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Event Processing

Event Processing changes considerably in SIF 3.0

Publishing Events is only allowed for the ‘Source of Truth’

Non-Sources of Truth can only request CRUD operations on the Source of Truth and if accepted the Source of Truth will publish the event to the Zone.

Impacts ‘

RefId

’ allocation

Only Source of Truth will allocate

RefIds

Non-Source of Truth must maintain a link between the Create Request until Source of Truth response with the new

RefId

.

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Event Processing cont.

Time Table App(Subscriber Service)

Attendance Tracking App(Subscriber Service)

SIS App(Provider Service)

Broker

“Source of Truth”

Save new

Student

Request

Create

Request

Create

Accepted

AB12FF5FE20945F12FFE2FF02211FF02

Accepted

AB12FF5FE20945F12FFE2FF02211FF02

Publish Create

Event

Publish Create

Event

LMS

(Subscriber Service)

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Bulk Operations

SIF 3.0 infrastructure enables bulk operations!

Creation of multiple objects in one request

Update

of multiple objects in one request

Deletion

of multiple objects in one request

=> Improves performance

=> Scales better

‘Requestor’ of bulk operation always knows success status of each object in the request.

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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Reduced ‘Chatiness’

Bulk Operations

Usage of standard HTTP Status codes rather than ACK/NAK Messages.

Queues: ‘Get Next Message and Delete Previous’ in one message rather then spread over 4 messages!

=> Improves performance

=> Scales better

=> Easier to implement!

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SIF3 Workshop Idea2013: SIF 3.0 Concepts

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SIF 3.0 Infrastructure Documentation

Confluence

http://kb.nsip.edu.au/display/NSIS/SIF+3.0+Design+Documents

SIF Association Website

https://www.sifassociation.org/Community/Global/Pages/SIF-3.0-Infrastructure-Review.aspx

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Questions

Any Questions?