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Work
Pulling
Pa-ern
with
Akka
Chris
Cundill
#SSDC
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About
Me
-‐
Chris
Cundill
Java
&
Scala
lead
dev
Worked
on
exciAng
high-‐scale
projects
with
• InternaAonal
Baccalaureate
• Friends
Life
Insurance
• Money
Supermarket
• DVLA!
Community
stuff
• Open
Source
commi-er
• Organiser
at
local
Tech
Meetup:
#SSDC
• Speaker;
Scaladays,
Swanseacon
• Blogger
-‐
#ThisWeekInScala
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Contents
• Akka
– Intro
– Tour
of
sample
of
projects
• Work
Pulling
Pa-ern
– The
what
and
why
• Real
world
applicaAon
– Driver
Data
Batch
Service
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ObjecAves
• Put
Akka
on
your
radar
• Encourage
use
of
Actor
model
for
concurrency
• New
pa-ern
for
your
repertoire
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Intro
to
Akka
• Started
by
Jonas
Boner
• Named
aVer
Swedish
mountain
• Adopted
by
MarAn
Odersky
&
Typesafe
• First
release
July
2009
• Latest
release
January
2015
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Intro
to
Akka
• What?
“Toolkit
and
run.me
for
building
highly
concurrent,
distributed,
and
resilient
message-‐driven
applica.ons
on
the
JVM.”
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Intro
to
Akka
• Why?
– Building
highly
concurrent
systems
is
hard
with
exisAng
languages
and
tools
– Default
paradigm
of
threads
and
locks
too
primiAve
• Too
low
level
for
solving
day-‐to-‐day
business
problems
– Provides
high-‐level
programming
model
to
build
highly
scalable
and
fault-‐tolerant
systems
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Intro
to
Akka
ReacAve
Manifesto
Responsive
Resilient
ElasAc
Message
Driven
reacAvemanifesto.org
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Intro
to
Akka
Manage
overload
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Intro
to
Akka
Scale
up
and
out
Burj
Khalifa,
Dubai
New
Century
Global
Centre,
Chengdu,
China
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Actor
Model
Intro
to
Akka
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Actor
Model
Intro
to
Akka
“…actors…
view
them
as
persons
…envision
a
group
of
people
and
assign
sub-‐tasks
to
them…all
with
the
benefit
of
not
actually
dealing
with
people,
which
means
that
we
need
not
concern
ourselves
with
their
emo9onal
state
or
moral
issues.”
Akka
DocumentaAon
Chapter
2
Paragraph
2
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JVM
Concurrency
Intro
to
Akka
X
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JVM
Concurrency
Intro
to
Akka
X
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JVM
Concurrency
Intro
to
Akka
X
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Actor
Concurrency
Intro
to
Akka
J
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Intro
to
Akka
• The
Actor
Model
State
Behaviour
Actor
Mailbox
Akka runtime enforces
that an Actor only
processes one message
at a time
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Intro
to
Akka
ActorRef
LocaAon
transparency;
fundamental
to
scalability
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Intro
to
Akka
ActorRef
Local
Remote
Routed
…
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Intro
to
Akka
Tour
Sample
Projects
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Intro
to
Akka
typesafe.com/get-‐started
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Work
Pulling
Pa-ern
michaelpollmeier.com/akka-‐work-‐pulling-‐pa-ern
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Work
Pulling
Pa-ern
• Modern
management
style
• Laissez-‐faire
(lit.
“Leave
do”)
• Empowering
• LiberaAng
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Work
Pulling
Pa-ern
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Work
Pulling
Pa-ern
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Driver
Data
Batch
Service
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No content
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Show
me
the
code
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Q&A