1. IBM Software Group
1
http://tuscany.apache.org
Luciano Resende
lresende@apache.org
http://lresende.blogspot.com
Jean-Sebastien Delfino
jsdelfino@apache.org
http://jsdelfino.blogspot.com
SCA Reaches the Cloud
Developing Composite Applications for the
Cloud with Apache Tuscany

2. IBM Software Group
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http://tuscany.apache.org
Agenda
 Cloud Computing – Goals and Challenges
 SCA – Goals and Overview
 SCA – Typical Scenarios
 Apache Tuscany
 Tuscany Demo – Rewiring Components in the Cloud
 Apache Nuvem
 Nuvem Demo – Cloud friendly Components
 Your Wish list?
 Getting Involved

3. IBM Software Group
3
http://tuscany.apache.org
Cloud Computing

4. IBM Software Group
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http://tuscany.apache.org
Cloud Computing – Some Goals
 Up and running in seconds
 Cheap
 Scale up and down
 Agile, reconfigure applications
as business evolves

5. IBM Software Group
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Cloud Computing – Not so easy?
 Different platforms and APIs (even languages) to learn... does my
business logic need to know?
 Am I getting OS images on demand? Infrastructure? an application
platform?
 Changing pricing models?
 How do I integrate hybrid clouds, on premise + public cloud?
 How do the various parts of my app communicate? Which protocols am I
using?
 How do I assemble / integrate them?
 How do I configure the QOS I need?
 How do I automate deployment?
 Can I move some parts from one cloud to another?

6. IBM Software Group
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http://tuscany.apache.org
What is SCA ?

7. IBM Software Group
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http://tuscany.apache.org
SCA - Goals
 Abstract out technical APIs, protocols, QOS
 Allow me to focus on my business logic
 Give me a structure for componentizing my app
 Help me assemble, wire, rewire, move parts around
 OASIS Standard (in progress)
 Open Source implementations
 Apache Tuscany
 Fabric3
 a few others
 Product implementations
 Initial target: SOA, Web Services, multi-language apps, application
integration

8. IBM Software Group
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http://tuscany.apache.org
Can SCA components help you in the cloud?
 We've been using different clouds in our Apache Tuscany work and are
starting to realize that SCA components can help there too!
 Components that easily communicate over a network
 Components that shield you from different infrastructures
 A way to describe your app and how it's assembled / wired
 and can be distributed in a cloud or multiple clouds
 Move components around clouds and rewire your app

9. IBM Software Group
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http://tuscany.apache.org
SCA – Assembly Model
Composite A
Component
AService
Service Binding
- Web Service
- JMS
- JCA
- SLSB
- HTTP
- JSONRPC
- ATOM
- …
Reference Binding
Component
B
Service Interface
- Java
- WSDL
Reference Interface
- Java interface
- WSDL PortType
Reference
property setting
Property
promotepromote wire
Implementation
- Web Service
- JMS
- JCA
- SLSB
- HTTP
- JSONRPC
- ATOM
- …
- Java
- BPEL
- SCA Composite
- Spring
- JEE
- Scripting: Groovy, JScript, PHP, Python, Ruby, …
- XQuery
- …

10. IBM Software Group
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SCA – Example assembly
Store
Catalog
Currency
Converter
http
currencyCode=USD
jsonrpc
ShoppingCart
atom
jsonrpc
Collection
Total
<composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
xmlns:t="http://tuscany.apache.org/xmlns/sca/1.1"
targetNamespace="http://store"
name="store">
<component name="Store">
<t:implementation.widget location="uiservices/store.html"/>
<service name="Widget">
<t:binding.http uri="/store"/>
</service>
<reference name="catalog" target="Catalog"/>
<reference name="shoppingCart" target="ShoppingCart/Cart"/>
<reference name="shoppingTotal" target="ShoppingCart/Total"/>
</component>
<component name="Catalog">
<implementation.java class="services.FruitsCatalogImpl"/>
<property name="currencyCode">USD</property>
<service name="Catalog">
<t:binding.jsonrpc/>
</service>
<reference name="currencyConverter" target="CurrencyConverter"/>
</component>
<component name="ShoppingCart">
<implementation.java class="services.ShoppingCartImpl"/>
<service name="Cart">
<t:binding.atom uri="/ShoppingCart/Cart"/>
</service>
<service name="Total">
<t:binding.jsonrpc/>
</service>
</component>
<component name="CurrencyConverter">
<implementation.java class="services.CurrencyConverterImpl"/>
</component>
</composite>

11. IBM Software Group
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SCA – if you don't like XML
final Composite comp =
build(composite("http://sample", "test",
component("client-test",
implementation(ClientTest.class,
service(Client.class),
reference("jello", Hello.class),
reference("wello", Hello_wsdl)),
reference("jello", "jello-test"),
reference("wello", "wello-test")),
component("wello-test",
implementation(WelloTest.class,
service(Hello_wsdl),
reference("upper", Upper_wsdl)),
reference("upper", "upper-test")),
component("jello-test",
implementation(JelloTest.class,
service(Hello.class),
reference("upper", Upper.class)),
reference("upper", "upper-test")),
component("upper-test",
implementation(UpperTest.class,
service(Upper.class)))), ec);

12. IBM Software Group
12
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SCA – if you like Java annotations
Component
Account
Service
implmentation
@Remotable
public interface AccountService {
AccountReport getAccountReport(String customerID);
}
public class AccountServiceImpl implements AccountService {
…
@Reference
public void setAccountDataService(AccountDataService value) {
accountDataService = value;
}
@Reference
public void setStockQuoteService(StockQuoteService value) {
stockQuoteService = value;
}
@Property
public void setCurrency(String value) {
currency = value;
}
…
}

13. IBM Software Group
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SCA – if you like to click around
• Eclipse STP Tools project provides SCA tooling

14. IBM Software Group
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http://tuscany.apache.org
SCA – Typical Scenarios

15. IBM Software Group
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Online Store
<composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
xmlns:t="http://tuscany.apache.org/xmlns/sca/1.1"
targetNamespace="http://store"
name="store">
<component name="Store">
<t:implementation.widget location="uiservices/store.html"/>
<service name="Widget">
<t:binding.http uri="/store"/>
</service>
<reference name="catalog" target="Catalog"/>
<reference name="shoppingCart" target="ShoppingCart/Cart"/>
<reference name="shoppingTotal" target="ShoppingCart/Total"/>
</component>
<component name="Catalog">
<implementation.java class="services.FruitsCatalogImpl"/>
<property name="currencyCode">USD</property>
<service name="Catalog">
<t:binding.jsonrpc/>
</service>
<reference name="currencyConverter" target="CurrencyConverter"/>
</component>
<component name="ShoppingCart">
<implementation.java class="services.ShoppingCartImpl"/>
<service name="Cart">
<t:binding.atom uri="/ShoppingCart/Cart"/>
</service>
<service name="Total">
<t:binding.jsonrpc/>
</service>
</component>
<component name="CurrencyConverter">
<implementation.java class="services.CurrencyConverterImpl"/>
</component>
</composite>
Store
Catalog
Currency
Converter
currencyCode=USD
jsonrpc
ShoppingCart
atom
jsonrpc
Collection
Total

16. IBM Software Group
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Gateway / Mediation
Gateway
jsonrpc
Service
<composite xmlns=http://docs.oasis-
open.org/ns/opencsa/sca/200903
xmlns:t=http://tuscany.apache.org/xmlns/sca/1.1
targetNamespace=http://store name=”gateway">
<component name=”Gateway">
<implementation.java class="services.GatewayImpl"/>
<service name=”A">
<t:binding.jsonrpc/>
</service>
<reference name=”refService”>
<binding.x uri=“http://domain:8080/atomService”>
</reference>
</component>
</composite>
Service
ShoppingCart

17. IBM Software Group
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http://tuscany.apache.org
Feed Aggregator / Converter
ATOM
Aggregator
Sort
RSS
Aggregator
RSS
ATOM
RSS
ATOM
<composite xmlns=http://docs.oasis-open.org/ns/opencsa/sca/200903
xmlns:t=http://tuscany.apache.org/xmlns/sca/1.1
targetNamespace=http://store name=”feedAgregator">
<component name="AtomAggregator">
<implementation.java class="feed.AggregatorImpl"/>
<reference name="sort" target="Sort"/>
<reference name="atomFeed1">
<tuscany:binding.atom
uri="http://apache-tuscany.blogspot.com/feeds/posts/default"/>
</reference>
<reference name="atomFeed2">
<tuscany:binding.atom
uri="http://feeds.feedburner.com/blogspot/Dcni?format=xml"/>
</reference>
<property name="feedTitle">Atom Aggregator Sample</property>
</component>
<component name="Sort">
<implementation.java class="feed.SortImpl"/>
<property name="newFirst">true</property>
</component>
</composite>

18. IBM Software Group
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http://tuscany.apache.org
Business Integration – Travel Booking Process
JEE Components
POJOs
Spring Assemblies
Scripting Components
BPEL Processes
T u s c a n y S C A
T o u r s U I
T r a v e l C a t a l o g
T r i p B o o k i n g
H o t e l
P a r t n e r
F l i g h t
P a r t n e r
C a r
P a r t n e r
C u r r e n c y
C o n v e r t e r
T r i p
P a r t n e r
J a v a
J a v a
J a v a
J a v a
W i d g e t
f u l l a p p - u i ( 8 0 8 0 ) f u l l a p p - f r o n t e n d ( 8 0 8 4 )f u l l a p p - p a c k a g e d t r i p ( 8 0 8 5 )
f u l l a p p - b e s p o k e t r i p ( 8 0 8 6 )
f u l l a p p - c u r r e n c y ( 8 0 8 3 )
E J B
J a v a
J a v a
> l s - l s a
S C A T o u r s
J a v a
1 2 3
4 5 6
7 8 9

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Apache Tuscany

20. IBM Software Group
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http://tuscany.apache.org
Apache Tuscany
 Lightweight SCA runtimes
 Leverage and integrate with the Apache platform
 Active Open-Source community, started in 2005
 “Release early release often”, many releases
 Two release streams, 1.x (stable), 2.x (trunk)
 Working on OASIS SCA compliance
 Innovations beyond the SCA spec (JSON, REST, ATOM, Comet etc)
 SCA Java runtime, standalone or on Google AppEngine / Java, supports
Java, scripting, BPEL, Spring components, and many protocol bindings
 SCA Python runtime on Google AppEngine / Python
 SCA Native, supports C++ and Python components

21. IBM Software Group
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http://tuscany.apache.org
Tuscany Demo – SCA Component Rewiring
 SCA Java Application on EC2
 Push one component out to Google AppEngine / Java
 Rewrite it in Python and move it Google AppEngine / Python
 Move it to a native SCA runtime on EC2
 Easy runtime reconfiguration as you rewire the app
 You've got choices, and can be agile!

22. IBM Software Group
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http://tuscany.apache.org
Tuscany Demo – SCA Component Wiring
Currency
Converter
currencyCode=USD
jsonrpc
Catalog
Fruit
Catalog
((Python))
Fruit
Catalog
(Java)
store
Configuration Repository
Fruit
Catalog
((Native))
Tuscany
Runtime
Shell

23. IBM Software Group
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http://tuscany.apache.org
Apache Nuvem
Components for the Cloud

24. IBM Software Group
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http://tuscany.apache.org
Apache Nuvem - Overview
 New project in the Apache incubator
 Initial code contribution from Apache Tuscany
 A few technical components already there
 Running on Google AppEngine, today's demo also on EC2
 Project is just starting so there's a lot of room for innovation!

25. IBM Software Group
25
http://tuscany.apache.org
Nuvem, REST, and Cloud friendly Components
 With REST, components get a simple GET/POST/PUT/DELETE interface
 More importantly it's a fixed interface
 Making components easier to assemble and compose
 Like Lego blocks!
 Web apps are starting to favor a protocol short list
 HTTP verbs with some format variations (XML, ATOM, RSS, JSON)
 That helps too!
 What if you had a palette of Cloud friendly components?
 Accessible through a simple REST interface
 To help simplify your apps and enable them to work on different clouds?

26. IBM Software Group
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Nuvem Demo – Technical Components
 SCA Java runtime on Google AppEngine / Java
 Using different implementations of a simple datastore component
 First using a HashMap
 Second using Google's Memcached

27. IBM Software Group
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Nuvem Demo – Technical Components
Currency
Converter
currencyCode=USD
jsonrpc
Catalog
Vegetables
Catalog
store
ShoppingCart
Manager
User
MapDocument
Service
MapDocument
Service

28. IBM Software Group
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Nuvem Components – Wish list
 Simple data store cache
 Hierarchical cache, which can delegate to another cache
 Invocation cache, which caches responses to requests
 Key/value datastore
 Simple (S)QL datastore
 Datastore that understands master/slave replication and sharding
 XMPP chat
 Message queue
 Oauth 1.0/2.0 + OpenID
 User profile

29. IBM Software Group
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Cloud Components
 What's your wish list?

30. IBM Software Group
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Getting Involved
with Apache Tuscany

31. IBM Software Group
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SCA - Resources
 Good introduction to SCA
 http://www.davidchappell.com/articles/Introducing_SCA.pdf
 OASIS Open CSA – http://www.oasis-opencsa.org
 V1.1 level specs
 http://www.oasis-opencsa.org/sca
 Open CSA Technical Committees
 http://www.oasis-opencsa.org/committees
 OSOA
 http://osoa.org/display/Main/Home
 More information on that site
 http://osoa.org/display/Main/SCA+Resources

32. IBM Software Group
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http://tuscany.apache.org
Apache Tuscany Resources
 Apache Tuscany
 http://tuscany.apache.org
 Getting Involved
 http://tuscany.apache.org/getting-involved.html
 Tuscany SCA Java Releases
 http://tuscany.apache.org/sca-java-2x-releases.html
 http://tuscany.apache.org/sca-java-releases.html
 Tuscany SCA Java Documentation
 http://tuscany.apache.org/java-sca-documentation-menu.html
 Tuscany Dashboard
 http://tuscany.apache.org/tuscany-dashboard.html

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Getting Involved
with Apache Nuvem

34. IBM Software Group
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Apache Nuvem Resources
 Apache Nuvem
 http://incubator.apache.org/nuvem/
 Getting Involved
 http://incubator.apache.org/nuvem/nuvem-getting-involved.html

35. IBM Software Group
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http://tuscany.apache.org
Thank You !!!