scala: simplifying development at
TRANSCRIPT
simplifying development at guardian.co.uk
Graham Tackley - @tackersarchitect, guardian.co.uk
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2006-2008: “R2”BackgroundDecisionImpactOutcomes
main java (185k)
main xml (35k)
velocity (72k)
test java (248k)
0 75,000 150,000 225,000 300,000
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main java (185k)
main xml (35k)
velocity (72k)
test java (248k)
0 75,000 150,000 225,000 300,000
BackgroundDecisionImpactOutcomes
main java (185k)
main xml (35k)
velocity (72k)
test java (248k)
0 75,000 150,000 225,000 300,000
BackgroundDecisionImpactOutcomes
main java (185k)
main xml (35k)
velocity (72k)
test java (248k)
0 75,000 150,000 225,000 300,000
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it’s ok, but...
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2009BackgroundDecisionImpactOutcomes
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Small Independent Componentsover
The Monolith
We value
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Clarity of Intentover
Ceremonial Abstraction
We value
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it’s ok, but...
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Architectural Evolutionover
Architectural Revolution
We value
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it’s just bytecode;a war is a war
mixed scala & java projects work
huge drop in verbosityand boilerplate
same infrastructure: toolset, libraries, build, runtime
huge drop in verbosityand boilerplate
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Craftover
Patterns
We value
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http://content.guardianapis.comhttp://www.guardian.co.uk/open-platform
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2010 20112009
Nov
java + guice + guice servlets + apache solr
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2010 20112009
Jan
java + guice + guice servlets + apache solr
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2010 20112009
Jan
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2010 20112009
Jan
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2010 20112009
Feb
scala + guice + guice servlets + apache solr
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2010 20112009
May
scala + guice + guice servlets + apache solr
Live!
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2010 20112009
July
scala + guice + guice servlets + apache solr
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2010 20112009
July
scala + lift + apache solr
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2010 20112009
July
scala + lift + apache solr
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2010 20112009
Now
scala + lift + apache solr
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The roll-it-out-to-everyone plan
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The roll-it-out-to-everyone plan
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How did we learn?
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How did we learn?
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How did we learn?
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How did we learn?
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How did we learn?
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How did we learn?
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Passionate Developersover
Turning the Crank
We value
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Complexity vs Simplicity
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Clarityover
Cleverness
We value
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preference for immutability
scala console encourages viewing code as a living entity
awesome test frameworks
reduced need for complex frameworks
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love-hate relationship with sbt
tool support immature compared with java
compiler is slow
rate of change
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https://github.com/guardian/frontend-article
ClarityoverCleverness
BackgroundDecisionImpact
Outcomes
Small Independent Componentsover
The Monolith
Clarity of IntentoverCeremonial Abstraction
Craftover
Patterns
Passionate Developersover
Turning the Crank
Architectural Evolutionover
Architectural Revolution
ClarityoverCleverness
BackgroundDecisionImpact
Outcomes
Small Independent Componentsover
The Monolith
Clarity of IntentoverCeremonial Abstraction
Craftover
Patterns
Passionate Developersover
Turning the Crank
Architectural Evolutionover
Architectural Revolution
@tackers
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