Presentations text content in SIF 3.0 Concepts
Slide1
SIF 3.0 Concepts
Workshop Idea13
Joerg Huber
Slide212 November 2013
SIF3 Workshop Idea2013: SIF 3.0 Concepts
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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
Slide312 November 2013
SIF3 Workshop Idea2013: SIF 3.0 Concepts
3
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
Slide412 November 2013
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
Slide512 November 2013
SIF3 Workshop Idea2013: SIF 3.0 Concepts
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Direct Zone cont.
Slide612 November 2013
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
Slide712 November 2013
SIF3 Workshop Idea2013: SIF 3.0 Concepts
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Brokered Zone cont.
Slide812 November 2013
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
Slide912 November 2013
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
Slide1012 November 2013
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
Slide1112 November 2013
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
.
Slide1212 November 2013
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)
Slide1312 November 2013
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.
Slide1412 November 2013
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!
Slide1512 November 2013
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
Slide1612 November 2013
SIF3 Workshop Idea2013: SIF 3.0 Concepts
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Questions
Any Questions?
SIF 3.0 Concepts
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