REST IN BRAZILSERVICES AND ISSUES TO BE FOUGHTGuilherme de Azevedo Silveira

Tuesday, May 14, 13

BRAZIL

• huge

• huge custom software development market

• huge software integration issues

• huge cobol, vb, delphi, java, c# legacy systems

• software development and educational revolution

Tuesday, May 14, 13

GUILHERME SILVEIRA

• Caelum CTO

• Software Development Education

• http://www.caelum.com.br

• http://www.casadocodigo.com.br

• guilherme.silveira@caelum.com.br

Tuesday, May 14, 13

GUILHERME SILVEIRA

• Applied Math (Discrete Dynamic Systems)

• REST (in practice)

•고려사이버대학교 컴퓨터정보통신학과 (Cyber Korea University)

Tuesday, May 14, 13

AGENDA

• brazilian projects

• industry

• industry issues

• adoption issues

• educational issues

Tuesday, May 14, 13

ALEXANDRIA• engineering.abril.com.br

• Abril Midia

• graphic

• distributor

• education

• CMS

• Luis Cipriani

Tuesday, May 14, 13

ALEXANDRIA: CONTENT

• 3 languages types

• 7 databases types

• 9 frameworks

• 207 machines

• 12.5 million pageview/month

Tuesday, May 14, 13

ALEXANDRIA: APPROACH

• Layered System

• Stateless

• Cache

• Code-on-demand

• ...

Tuesday, May 14, 13

ALEXANDRIA: CONCLUSIONS

• Long term needs

• Documentation need++

• Focus on protocol improvements later

Tuesday, May 14, 13

ALEXANDRIA

• REST: Advanced Research Topics and Practical Applications, Springer

Tuesday, May 14, 13

CAELUM

• live learning

• enrollments, payments

• alumni

• job postings

Tuesday, May 14, 13

trainingjava + vraptor

one systemalumni.caelum.com.br

RoR

ondetrabalhar.comruby

mysqlmysql

solr

Tuesday, May 14, 13

CAELUM ONLINE

• online: learning environment

• training

• exercises

• videos

• explanations

• experience exchange

• paymentsTuesday, May 14, 13

trainingjava + vraptor

one systemalumni.caelum.com.br

RoR

ondetrabalhar.comruby

gnarusscala + vraptor

casa do códigojava + RoR

paymentsjava

metricsjava + octave

interestiesinatra + sequel

sugestjava

promoRoR

analyser 1sinatra

analyser 2java

exercisesRoR

badgesruby + rails mountable engine

RoR + 6 projectsRoR

+ 1 ‘pages’jsaws tickets

RoR

bookssinatra + sequel

mysqlmysql

mysql

mysql

mysql

redis

redis

solr

github

postgresql postgresql

postgresql

postgresql

postgresql

postgresql

Tuesday, May 14, 13

CAELUM ONLINE

• > 18 systems

• 4 language types

• 5 frameworks

• 5 database types

• < 20 developers

Tuesday, May 14, 13

trainingjava + vraptor

one systemalumni.caelum.com.br

RoR

ondetrabalhar.comruby

gnarusjava + vraptor

casa do códigojava + RoR

paymentsjava

metricsjava + octave

interestiesinatra + sequel

sugestjava

promoRoR

analyser 1sinatra

analyser 2java

exercisesRoR

badgesruby + rails mountable engine

RoR + 6 projectsRoR

+ 1 ‘pages’jsaws tickets

RoR

bookssinatra + sequel

mysqlmysql

mysql

mysql

mysql

redis

redis

solr

github

postgresql postgresql

postgresql

postgresql

postgresql

postgresql

Tuesday, May 14, 13

WE STUDY

• advantages

• disadvantages

Tuesday, May 14, 13

WHAT ABOUT OTHERS?

• people

• companies

• projects

• schools

Tuesday, May 14, 13

DEVELOPERS

• know

• GET, POST

• html

• js

Tuesday, May 14, 13

DEVELOPERS• know

• GET, POST

• html

• js

• no idea

• http

• hypermedia

Tuesday, May 14, 13

COMPANIES

• know

• GET, POST

• html

• js

Tuesday, May 14, 13

COMPANIES• know

• GET, POST

• html

• js

• no idea

• http

• hypermedia

Tuesday, May 14, 13

SCHOOLS

• teach

• GET, POST

• html

• js

Tuesday, May 14, 13

SCHOOLS• know

• GET, POST

• html

• js

• no idea

• http

• hypermedia

Tuesday, May 14, 13

companieslooking ahead

academia

the rest of the industry

Tuesday, May 14, 13

GAP

ourstudy

everyone’spractice

Tuesday, May 14, 13

I FEEL LOST

as industry

Tuesday, May 14, 13

as a client

Tuesday, May 14, 13

AS A CLIENT, HOW DO I?• service discovery

• in an android environment

• google intents; web intents

• on the web?

• web intents?

• richer? standards? good practices?

• “A Framework for Self-Descriptive RESTful Services”

Tuesday, May 14, 13

as a client, i know my providers

Tuesday, May 14, 13

# OF ACTIONS SUPPORTED?

• web intents scales on providers

• what about # of actions?

• “Distributed Affordance: an Open-world Assumption for Hypermedia”

Tuesday, May 14, 13

as a company

Tuesday, May 14, 13

AN EXISTING SERVICE

• migration costs x no costs

• how do I publish my service?

• where do I publish my service?

• “A Concept for Generating Simplified RESTful Interfaces”

Tuesday, May 14, 13

AS A NEW SERVICE

• design?

• json?

• rdf?

• “Model Your Application Domain, Not Your JSON Structures”

Tuesday, May 14, 13

as a hammer

Tuesday, May 14, 13

we see everything as nails

Tuesday, May 14, 13

as a learning environment

Tuesday, May 14, 13

we see the problem as an human issue

Tuesday, May 14, 13

we see the problem asan human issue

Tuesday, May 14, 13

we see the problem as an human issue

• TDD

• test first

• + other software engineering practices

• Mauricio Aniche’s research

• http://www.aniche.com.br/publications

Tuesday, May 14, 13

we see the problem as an human issue

• developers

• solve problems with and without TDD

• analyze the solutions

Tuesday, May 14, 13

we see the problem as an human issue

• “No difference between TDD and no TDD.”

• “Experience and wisdom makes the difference.”

Tuesday, May 14, 13

we see the problem as an human issue

• Lutz Prechelt

• An empirical comparison of C, C++, Java, Perl, Python, Rexx, and Tcl

• http://page.mi.fu-berlin.de/prechelt/Biblio/jccpprt_computer2000.pdf

Tuesday, May 14, 13

we see the problem as an human issue

• developers

• solve a problem in different languages

Tuesday, May 14, 13

we see the problem as an human issue

• “the differences between languages tend to be smaller than the typical differences due to different programmers within the same language”

Tuesday, May 14, 13

as a learning environment

Tuesday, May 14, 13

we see the problem as an educational issue

Tuesday, May 14, 13

we see the problem asan educational issue

Tuesday, May 14, 13

SERVICE PRODUCTION CHAIN

school

graduation

industry

academia

we see the problem as an educational issue

Tuesday, May 14, 13

academia & industry

• try to bring every company and developer closer to research ?

• if not researching, trying in practice and analyzing its results?

Tuesday, May 14, 13

question:how can we make others think about

REST?

Tuesday, May 14, 13

how can we make others think about REST?

Guilherme Silveiraguilherme.silveira@caelum.com.br

THANK YOU

Tuesday, May 14, 13