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Transactions as a Service
Technical IntroductionTechnical Introduction
APIAPI
ManagerManager
TransactionTransaction
ManagerManager
SteroidsSteroids
+ + =
Cloud-Based Time-Limited Transactions
Just think...
To watch And feelThere are moments You enjoy
Did you ever think what happens
‘behind the scenes’?
The World could be easier!
The current world
The better world
face this, to get this, and feel like this.You arrive here, to use this,
authenticate at the entrance,You buy your ticket from where you are, and enjoy the game going through zero stress
Let’s build this together!
Tickeeeeeets!!!!
Tens of
Thousands of
fans
Many requests over a very
short period
Many servers
and services
involved
Denial of Service Attacks
Lost connections
Incomplete Transactions
Customer Churn
Bank Servers
Credit Card
Servers
Stadium
Servers
Others
Challenges
Backend Servers
VersaCloud
Architecture Overview
Cloud-Based
Transaction Manager
Back-end Servers
Computer Programs
Browsers & IoT Gadgets
Mobile Devices
Real-world Transaction Requirements
You check for
ticket availability
Stadium
ServerStadium
App
Credit
Card
Server
Bank
Server
You buy your
ticket
Your bank or
CC gets
charged Stadium
bank balance
is credited
Stadium
confirms
your seat
Stadium
locks your
seat
You enter
through the
ticket gate
Stadium
server
notifies your
smartphone
You ignore it,
because you’re
already happily
watching the
game
You ignore it,
because you’re
already happily
watching the
game
Transactions: Relational x Cloud
Cloud
• Sequence of individual operations
consisting of calls into
various back-end servers
Relational
• Sequence of individual operations
that apply changes to a SINGLE
database, to be applied only if all
of them produce no errors
Time-Limited Transactions
Unstable
Connections
Battery-
based devices
Incomplete Transactions
Solved by Time Limitation
‘Timeout’
concept
‘Timeout’
concept
Applied to
Transactions
Applied to
Transactions
Maximum
Running
Time
Maximum
Running
Time
The latest at transaction execution request
(MethodInvokeAllow)
The latest at transaction execution request
(MethodInvokeAllow)
Data
Every 'write'
handled
as a
transaction
…SetAllow
...SetCommit
…Get
UserUntilGet
UserSinceGet
ErrorDocumentationGet
SolutionUntilGet
PropertyValueGet
ErrorDocumentationSetCommit
UserSinceSetCommit
UserUntilSetCommit
PropertyValueSetCommit
SolutionUntilSetCommit
UserUntilSetAllow
UserSinceSetAllow
ErrorDocumentationSetAllow
PropertyValueSetAllow
SolutionUntilSetAllow
?
Inspired by OOP
We created…
Powered
Encapsulation
Get SetAllow SetCommit
Safer Faster AuditableInput handled as a transaction
From OOP to Cloud Transactions
Each Solution is composed
by a set of Methods
SolutionSolution
MethodMethod
MethodMethod
MethodMethod
MethodMethod
MethodMethod
......
BackendBackend
Callback
Callback
Callback
Callback
Callback
Callback
Callback
Callback
BackendBackend
Transaction #1Transaction #1
Transaction #4Transaction #4
Transaction #6Transaction #6
Transaction #7Transaction #7
Transaction #...Transaction #...
Transaction #2Transaction #2
Transaction #3Transaction #3
Transaction #5Transaction #5
• Transactions are instances of running methods
• Need to be specified by developers beforehand
• Each individual method can call into various back-end servers
Defining Transaction
Traditional Transactions
Begin Transaction
If IsError(Operation1)
Then Rollback : Exit
If IsError(Operation2)
Then Rollback : Exit
…
If IsError(Operationn)
Then Rollback : Exit
Commit Transaction
Allow Transaction MaxRunTime
Operation1
Operation2
…
Operationn
Commit Transaction
Time-Limited Transactions
Server rollbacks automatically upon expiration
Unless Commit received in less than MaxRunTime
Simplified Contract & Coding
VersaCloud'sBoundary
Transaction Execution
Backend ServerBackend Server
Up to 14
parameters
Front-end connector
API CallAPI Call
111
VersaCloud’s Transaction EngineVersaCloud’s Transaction Engine
User App/DeviceUser App/Device
Subset of API parameters
222
Front-end Boundary
Back-end Boundary
WebServiceWebService
Stored ProcedureStored Procedure
JSON
Other Protocols
SameSubset of API parameters
One Return Value
Backend ConnectorBackend Connector
One Return Value
One Return Value
Can be
333444
555
666
Transaction Parameters
For more details see: https://www.mbi.com.br/mbi/english/versacloud/type-index/
Strongly-typedStrongly-typed
ERRORERROR
detected
refused
reported
Back-end servers
totally shielded
from errors
Global Recalling Limitations
By limiting its
availability to
cloud
applications
Manage Backend Server CapacityManage Backend Server Capacity
User Recalling Limitations
By specifying a minimum
interval between
consecutive calls
Limit Consecutive User RequestsLimit Consecutive User Requests
Semantic Recalling Limitation
Additional transaction(s) with
same key values gets refused
until previous one completes or times out
Additional transaction(s) with
same key values gets refused
until previous one completes or times out
Set of 'key parameters' called
'Reentrancy Lock Key'
Set of 'key parameters' called
'Reentrancy Lock Key'
FromFrom ToTo AmountAmount
TransactionTransaction
A B 500
TransactionTransaction
F G 200
TransactionTransaction
C Z 350
TransactionTransaction
D A 1200
Active Transactions Queue
partial representation
A B 600
Additional TransactionAdditional Transaction
Reliable Transactions
Stadium
App
MethodInvokeAllow
Normal Callback #1
Normal Callback #2
time
Callback #3 Error!
Transaction enters RollBack state
Rollback Callback #2
Rollback Callback #1
Optional Rollback Callbacks
notify back-end servers about cancelled transactions
Optional Rollback Callbacks
notify back-end servers about cancelled transactions
Auditable Transactions
Measure
Performance
Reliable and precise
Indicators for SLA
Semantics
TimeFirst
Shield
First
Shield
Internal
Algorythm
Second
Shield
Second
Shield
Invalid API Calls
DDoS shielding
Current Risks
Monetizable Transactions
• User accounts have an associated credit balance
• Can be charged to run specific transactions
• Transactions will not be 'Allow'-ed if not enough balance available
• Transaction costs automatically returned to user account in case of
rollbacked transactions
• Users can obtain credits through:
• On-line purchase
• Managed user groups they are part of
Balance
3,799
Reload
Very Small
Charges
per transaction
Very Small
Charges
per transaction
Overcoming costs
of current
payment systems
Developer Friendly Environment
Strong Type System
Strict ChecksStrict Checks
API
Parameters
API
Parameters Return
Values
Return
Values
Frontend BackendBackend&
Detailed Feedback to ERRORSDetailed Feedback to ERRORS
Almost 1.000 detailed error
messages
Extensible by your Solutions
Currently available in English,
Spanish and Brazilian Portuguese
Extensible into as many
languages as required
Both for native and your APIs
Multilingual DocumentationMultilingual Documentation
VersaCloud API Overview
UsersUsers SolutionsSolutions
MethodsMethods
ErrorCodesErrorCodes
ParametersParameters
MethodRightsMethodRightsUserRightsUserRights
Call LogCall Log
UpgradesUpgrades
GroupsGroups
PropertiesProperties
CallbacksCallbacks
RightsRights
SolutionTokensSolutionTokens
M
embersof
Own
Members of
Require
Define
Customize
Need
to
have
Secured by
Every CallEvery Call
Members of
Receive 
Invoke
Return 
Receive 
Explore the right balance!
Innovate – or leave the game Better usage of existing resources
Join us NOW!
Complete documentation,
tutorials and case studies
available at
www.versacloud.technology
Get in touch!
mailto:mac@matza.group
whatsapp: +55 11 98281-2442
mailto:rocmayer@mbi.com.br
whatsapp: +55 11 99216 9776
callto:+55 11 3230 6850

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Versa cloud slide-deck-02-technical-introduction

  • 1. Transactions as a Service Technical IntroductionTechnical Introduction
  • 3. Just think... To watch And feelThere are moments You enjoy Did you ever think what happens ‘behind the scenes’?
  • 4. The World could be easier! The current world The better world face this, to get this, and feel like this.You arrive here, to use this, authenticate at the entrance,You buy your ticket from where you are, and enjoy the game going through zero stress Let’s build this together!
  • 5. Tickeeeeeets!!!! Tens of Thousands of fans Many requests over a very short period Many servers and services involved Denial of Service Attacks Lost connections Incomplete Transactions Customer Churn Bank Servers Credit Card Servers Stadium Servers Others Challenges
  • 7. Architecture Overview Cloud-Based Transaction Manager Back-end Servers Computer Programs Browsers & IoT Gadgets Mobile Devices
  • 8. Real-world Transaction Requirements You check for ticket availability Stadium ServerStadium App Credit Card Server Bank Server You buy your ticket Your bank or CC gets charged Stadium bank balance is credited Stadium confirms your seat Stadium locks your seat You enter through the ticket gate Stadium server notifies your smartphone You ignore it, because you’re already happily watching the game You ignore it, because you’re already happily watching the game
  • 9. Transactions: Relational x Cloud Cloud • Sequence of individual operations consisting of calls into various back-end servers Relational • Sequence of individual operations that apply changes to a SINGLE database, to be applied only if all of them produce no errors
  • 10. Time-Limited Transactions Unstable Connections Battery- based devices Incomplete Transactions Solved by Time Limitation ‘Timeout’ concept ‘Timeout’ concept Applied to Transactions Applied to Transactions Maximum Running Time Maximum Running Time The latest at transaction execution request (MethodInvokeAllow) The latest at transaction execution request (MethodInvokeAllow)
  • 12. Each Solution is composed by a set of Methods SolutionSolution MethodMethod MethodMethod MethodMethod MethodMethod MethodMethod ...... BackendBackend Callback Callback Callback Callback Callback Callback Callback Callback BackendBackend Transaction #1Transaction #1 Transaction #4Transaction #4 Transaction #6Transaction #6 Transaction #7Transaction #7 Transaction #...Transaction #... Transaction #2Transaction #2 Transaction #3Transaction #3 Transaction #5Transaction #5 • Transactions are instances of running methods • Need to be specified by developers beforehand • Each individual method can call into various back-end servers Defining Transaction
  • 13. Traditional Transactions Begin Transaction If IsError(Operation1) Then Rollback : Exit If IsError(Operation2) Then Rollback : Exit … If IsError(Operationn) Then Rollback : Exit Commit Transaction Allow Transaction MaxRunTime Operation1 Operation2 … Operationn Commit Transaction Time-Limited Transactions Server rollbacks automatically upon expiration Unless Commit received in less than MaxRunTime Simplified Contract & Coding
  • 14. VersaCloud'sBoundary Transaction Execution Backend ServerBackend Server Up to 14 parameters Front-end connector API CallAPI Call 111 VersaCloud’s Transaction EngineVersaCloud’s Transaction Engine User App/DeviceUser App/Device Subset of API parameters 222 Front-end Boundary Back-end Boundary WebServiceWebService Stored ProcedureStored Procedure JSON Other Protocols SameSubset of API parameters One Return Value Backend ConnectorBackend Connector One Return Value One Return Value Can be 333444 555 666
  • 15. Transaction Parameters For more details see: https://www.mbi.com.br/mbi/english/versacloud/type-index/ Strongly-typedStrongly-typed ERRORERROR detected refused reported Back-end servers totally shielded from errors
  • 16. Global Recalling Limitations By limiting its availability to cloud applications Manage Backend Server CapacityManage Backend Server Capacity
  • 17. User Recalling Limitations By specifying a minimum interval between consecutive calls Limit Consecutive User RequestsLimit Consecutive User Requests
  • 18. Semantic Recalling Limitation Additional transaction(s) with same key values gets refused until previous one completes or times out Additional transaction(s) with same key values gets refused until previous one completes or times out Set of 'key parameters' called 'Reentrancy Lock Key' Set of 'key parameters' called 'Reentrancy Lock Key' FromFrom ToTo AmountAmount TransactionTransaction A B 500 TransactionTransaction F G 200 TransactionTransaction C Z 350 TransactionTransaction D A 1200 Active Transactions Queue partial representation A B 600 Additional TransactionAdditional Transaction
  • 19. Reliable Transactions Stadium App MethodInvokeAllow Normal Callback #1 Normal Callback #2 time Callback #3 Error! Transaction enters RollBack state Rollback Callback #2 Rollback Callback #1 Optional Rollback Callbacks notify back-end servers about cancelled transactions Optional Rollback Callbacks notify back-end servers about cancelled transactions
  • 22. Monetizable Transactions • User accounts have an associated credit balance • Can be charged to run specific transactions • Transactions will not be 'Allow'-ed if not enough balance available • Transaction costs automatically returned to user account in case of rollbacked transactions • Users can obtain credits through: • On-line purchase • Managed user groups they are part of Balance 3,799 Reload Very Small Charges per transaction Very Small Charges per transaction Overcoming costs of current payment systems
  • 23. Developer Friendly Environment Strong Type System Strict ChecksStrict Checks API Parameters API Parameters Return Values Return Values Frontend BackendBackend& Detailed Feedback to ERRORSDetailed Feedback to ERRORS Almost 1.000 detailed error messages Extensible by your Solutions Currently available in English, Spanish and Brazilian Portuguese Extensible into as many languages as required Both for native and your APIs Multilingual DocumentationMultilingual Documentation
  • 24. VersaCloud API Overview UsersUsers SolutionsSolutions MethodsMethods ErrorCodesErrorCodes ParametersParameters MethodRightsMethodRightsUserRightsUserRights Call LogCall Log UpgradesUpgrades GroupsGroups PropertiesProperties CallbacksCallbacks RightsRights SolutionTokensSolutionTokens M embersof Own Members of Require Define Customize Need to have Secured by Every CallEvery Call Members of Receive  Invoke Return  Receive 
  • 25. Explore the right balance! Innovate – or leave the game Better usage of existing resources
  • 26. Join us NOW! Complete documentation, tutorials and case studies available at www.versacloud.technology Get in touch! mailto:mac@matza.group whatsapp: +55 11 98281-2442 mailto:rocmayer@mbi.com.br whatsapp: +55 11 99216 9776 callto:+55 11 3230 6850