In these slides I show how to create a simple application where all the components act in a reactive (push/asynchronous) way, including the database. I'll show a preview of a new functionality that is being released in OrientDB: Live Query

1. ROME 27-28 march 2015
Fully Reactive
From Data to UI
with OrientDB + Node.js + Socket.io
Director of Consulting
Orient Technologies LTD
The company behind OrientDB
Twitter: @ldellaquila
Luigi Dell’Aquila

2. ROME 27-28 march 2015 - Luigi Dell’Aquila
From Wikipedia
reactive programming is a
programming paradigm oriented
around data flows and the
propagation of change

3. ROME 27-28 march 2015 - Luigi Dell’Aquila
Propagation of change
A = 1
B = 3
C = A + B // C == 4

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Propagation of change
A = 1
B = 3
C = A + B // C == 4
A = 2

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Propagation of change
A = 1
B = 3
C = A + B // C == 4
A = 2
C == ?

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So it’s about
Programming
Isn’t it…?

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From Reactive Manifesto
Reactive systems are:

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From Reactive Manifesto
Reactive systems are:
UX

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From Reactive Manifesto
Reactive systems are:
Infrastructure

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From Reactive Manifesto
Reactive systems are:
Programming paradigm?

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So it’s about
Systems!

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Application

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UI/UX
Application

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UI/UX
Application
Data(base)

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UI/UX
Application
Data(base)

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UI/UX
Application
Data(base)
UI/UX
Application
Data(base)
UI/UX
Application
Data(base)

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Time to
Code

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Socket.IO enables real-time bidirectional event-based communication.
It works on every platform, browser or device,
focusing equally on reliability and speed.

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Node.js® is a platform built on Chrome's JavaScript runtime
for easily building fast, scalable network applications.
Node.js uses an event-driven, non-blocking I/O model that makes it
lightweight and efficient, perfect for data-intensive real-time applications
that run across distributed devices.

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OrientDB is a 2nd Generation Distributed Graph Database
with the flexibility of Documents in one product
and an Open Source commercial friendly license (Apache 2)

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Let’s Start
(Fully reactive chat in 30 LOC)

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package.json
{
"name": "codemotion",
"version": "1.0.0",
"description": "Here we are",
"dependencies": {
}
}

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> npm install --save express@4.10.2
> npm install --save socket.io

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Live…

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Install OrientDB
(experimental branch, will be released soon)
https://github.com/orientechnologies/orientdb/tree/livequery
> ant clean install

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Install Oriento (OrientDB driver for Node.js)
> npm install git://github.com/luigidellaquila/oriento#livequery
(will be)
> npm install oriento
Please, have a little patience, it’s still bleeding edge ;-)
Everything will be officially released in a few weeks.

30. ROME 27-28 march 2015 - Luigi Dell’Aquila
Execurte live query:
You can provide three callback functions
•One for insert
•One for update
•One for delete
They will be invoked every time an insert/update/delete operation
is executed in the database (push to the application, asynchronous)

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And… elastic, resilient…
Do you remember?

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HAZELCASTHAZELCAST HAZELCASTHAZELCAST
HAZELCASTHAZELCAST
Multi Master

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HAZELCASTHAZELCAST HAZELCASTHAZELCAST
AsyncAsync
Async
Async
Async
Async

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References
Official Website
http://www.orientechnologies.com
Public Repository
http://github.com/orientechnologies/orientdb
Free on-line training
http://www.orientechnologies.com/training/

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Questions?

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