Caitie McCaffrey!
Distributed Systems Engineer
@CaitieM20
CaitieM.com
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Orleans
“Orleans is a runtime and
programming model for
building distributed systems,
based on the actor model”
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Overview
• The Actor Model
• Orleans Core Concepts
• Build A System
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The Actor Model
A framework & basis for reasoning about concurrency
A Universal Modular Actor Formalism for Artificial Intelligence !
Carl Hewitt, Peter Bishop, Richard Steiger (1973)
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“An actor is an entity that
encapsulates data & computation”
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Orleans Actors
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Single Threaded Code
Execution
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Virtual Actors
“An Orleans actor always exists, virtually. It
cannot be explicitly created or destroyed”
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Virtual Actors
• Perpetual Existence
• Automatic Instantiation
• Location Transparency
• Automatic Scale out
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Orleans Runtime
• Messaging
• Hosting
• Execution
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Reliability
“Orleans manages all aspects of reliability automatically”
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TOO!
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TOO!
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TOO!
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CAP Theorem
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Orleans is AP
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At Least Once
Messaging
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Let’s Build Something
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Smart Homes
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System Primitives
• Home
• Rooms
• Sensors
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Programming Model
• .NET Framework!
• Actor Interfaces!
• Promises!
• Actor References
• Turns
• Persistence
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Programming Model
• .NET Framework
• Actor Interfaces
• Promises
• Actor References!
• Turns
• Persistence
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Programming Model
• .NET Framework
• Actor Interfaces
• Promises
• Actor References
• Turns!
• Persistence
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Messaging Patterns
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Deadlocks
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Temp Sensor Grain
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Isolation
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Immutable
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IRoomGrain
Room Grain
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Timers
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RoomGrain
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RoomGrain
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Observers
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Summary
• Actor Model
• Orleans is a Framework & Runtime for building
distributed systems using the Actor Model
• Orleans Solves hard Distributed Systems Problems
for You
• Developer Productivity
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Get Orleans
!
download & samples:!
https://orleans.codeplex.com/
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@CaitieM20
Questions?
Thursday Nov 6th 2014,16:40
Building the Halo 4 Services w/
Orleans