1. LitwareHR v2: an S+S reference application
1/16/2019
LitwareHR v2: an S+S reference application
Gianpaolo Carraro
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The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2. “S+S World”
Build

3. Why LitwareHR? Architecture Guidance (whitepapers)
Bits (code) for a common application scenario
Meant to be:
Reference for ISVs wanting to move to S+S
Reference for Hoster to host an S+S solution
Reference for Enterprise to consume an S+S solution

4. S+S Architecture: Build
Application Architecture
Designing a “back end as a service”
Multi-tenancy vs. Isolation
Customization: Metadata - Templatized
Service Layer design
Scale & Performance
Self Service / Try before you buy
Designing the “right” front end
Disconnected experience
Smart Client tenant customization
Office as UI
Taking advantage of “Cloud Services”
Silverlight Streaming
(Future) additional cloud infrastructure
SilverLight Streaming
LitwareHR

5. LitwareHR Overview Rich Client Secure Web Client Web Client Network
Rich Client
Offline Support
Rich Visualization
Batch Entry
Office Integration
Secure Web Client
Private admin site
Authentication
Authorization
Web Client
Public Web site
Apply for jobs
Network
HR Application (job site)
Single instance multi-tenant

6. LitwareHR Demo

7. High Level Architecture
Private
Website
Functional
Services
Web Client
Multi-Tenant Data Access
Internet
Public
Website
Metadata
Services
SQL Server
Smart Client
WCF WF
ASP.NET
REST/
SOAP APIs

8. Database Extensibility Patterns
Extension Table
Xml Columns
Fixed Columns

9. Multi-Tenant DB Performance Testing
SQL Server 2005:
HP Proliant DL 380
1 Dual Core Proc (1.8 Ghz)
4 GB Memory
3 spindles SCSI RPM

10. Extension Table Shared table with schema common to all tenants
Shared extension table that contains one row for each field unique to a tenant

11. Extension Table – View (one join per table)
Shared fields
A view is created for each tenant
Custom fields

12. Test Retrieve a random page of records from a random tenant view
SELECT *, ROW_NUMBER() OVER (ORDER BY Id) as RowNumber
FROM entity_tenant(x)
WHERE RowNumber >= (#y) and RowNumber <= (#z)
Notes: (#y) and (#z) are random values based on the number of records
Page Size = (#z) - (#y)
Randomization

13. How Does it Scale?
9 Extension Fields

14. How Does it Scale? Tx/sec, CPU use and memory (with side effect of I/O activity)
Memory pressure
&
I/O Activity
No relevant
I/O Activity
25 concurrent users

15. “Theory behind this”
MSDN Article:

16. Metadata Driven Architecture
Application Configuration and Designer Tools
User Interface
Workflow and Rules
Entity Model
“Polymorphic” Runtime
Meta Data Service
Tenant Profile
and
Configuration Data

17. UI and Workflow configuration
UI config
CSS upload too permissive?
What is safe to replace?
Workflow config
Runtime behavioral checking
Model validation
Workflow too restrictive?

18. Templatized Configuration
Policies
Security, Fairness and Halting Policies
Design Time
Metadata
Designer Policy Enforcement Engine
Runtime Policy Enforcement Engine
Runtime
Standard Customers
Runtime Metadata
Runtime Metadata
Trusted Partners
Application Instance
Premium Customers
Runtime Metadata
Templatized Designers

19. Software + Services Blueprints Architecture Assumptions Overview
Configuring Data Access
Adding Optional Projects

20. Entity Definition Blueprint
Software + Services
Blueprints
Entity Definition Blueprint
Work done so far
Extract data model code & scripts from LitwareHR
Unit Tests for data model base code
Entity Wizard User Experience