Seam in the Clouds

Pete MuirPrincipal Software Engineer, JBoss7th October 2010

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Pete Muir

Seam’s Mission

“To provide a fully integrated development platform for building rich Internet applications based upon standards and supporting cloud environments”

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Pete Muir

Java EE 6

•The EE 6 web profile removes most of the “cruft” that has developed over the years•mainly totally useless stuff like web services, EJB 2 entity beans etc.•some useful stuff (e.g. JMS) is missing, but vendors can include it

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CDI

•CDI defines a unifying dependency injection and contextual lifecycle model for Java EE 6 •a completely new, richer dependency management model •designed for use with stateful objects •integrates the “web” and “transactional” tiers •makes it much easier to build applications using JSF and EJB together •includes a complete SPI allowing third-party frameworks to integrate cleanly in the EE 6 environment

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The Seam Stack

•A complete solution for developing applications based upon Java EE standards•Integrating technologies is a framework concern

•The stack consists of...•Java EE integration within the platform•Declarative security•Extension of CDI programming model to GWT•JavaScript remoting•Infinispan support•Drools support

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Getting started with Seam...is easy!

•Focus on delivering useful functionality to users early on, then repeat•Eclipse tooling – JBoss Developer Studio (JBDS)•Deploy apps to the cloud from JBDS

•Incremental hot deployment•To your local server or remote cloud server

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Evolution of Seam

•What does Seam 3 look like?•Core Services provided by CDI•A set of modules for addressing needs of developer•Development environment and tooling•Based around Java EE 6 APIs (JSF 2, JPA 2, EJB 3.1)•But runs on other platforms

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Runtime environments

•Any Java EE 6 container•JBoss AS 6•GlassFish V3

•Weld also supports•Tomcat•Jetty•Java SE support

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Runtime Environments

•EC2•JBoss AS / EAP•Tomcat

•Google App Engine

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Deltacloud

•Abstraction over cloud providers

•REST based API•Query for instances, images, basic metadata

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Tools

•SteamCannon•Stand up PaaS based on Java EE / JBoss AS•Many cloud providers•Focus on developing apps, not infrastructure

•Web Interface or Remote API•Clustering•Easily add nodes to the cluster•Load balancing

•Monitoring•Integration with JON

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Tools

•JBoss Tools•Supports CDI (refactoring, quick links etc.)•Support for integrated frameworks•No special support needed normally for Seam integration modules•Visual editors for configuration files•Incremental deployment to any cloud provider via deltacloud

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Ticket Monster

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Persistence

•Conversation Scoped Persistence Context (SMPC)

•Support for JPA and JTA in non EE 6 environments

•Integration with Hibernate Search

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•AJAX via a component-centric approach

•Interact with the server-side object model, within a conversation/transaction

•Model can be dynamically expanded•Simple to use client-side JavaScript API

Pete Muir

JavaScript Remoting

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Cloud support

•Infinispan•Injection and configuration of Infinispan caches•Transaction integration

•JClouds support•Abstraction over compute (e.g. EC2) and storage (e.g. S3)

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Seam 3

Runtime

Weld

Java EE

6

JBoss AS 6

GlassFish V3

Servlet

Tomcat

Jetty

Java SE

Security

Wicket

Remoting

Mail

DroolsServlet

JPA/JTA

JMS

GWT

Faces

i8ln/l10nXML ConfigJBoss ESB

jBPM

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Modules

•Modules:•Contain standalone docs•Have examples•Use only the CDI API, no internal APIs•Are released on an independent cycle

•Sandbox:•Area for people to try out new ideas

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Independent Module Releases

Sea

m 3

.1

Sea

m 3

.2

Seam Security 3.0.7

Seam Mail3.0.0

Seam Security3.0.7

Seam GWT3.0.0

Seam Security3.0.8

Time boxed: 6 monthsSimultaneous Releases

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Simultaneous Releases

Seam Security

Documentation Examples API

Seam Framework

Seam Mail

Drools5 support

JBoss ESB

Wicketsupport

XML Config-uration

Documentation

Examples

Tooling

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Tools

•Seam Forge -- RAD command line tool•bash-style auto-complete•pluggable•allow any server to be supported•allow any view layer to be supported

•canonical source of new project definition•all tools use these (e.g. JBoss Tools)•Freemarker templates•POMs for dependency definition

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Testing

•Shrinkwrap•declarative definitions of deployment archives•uses a fluid API

•Arquillian•run the same test in any supported container•(Re) uses JUnit/TestNG - works with existing tools•injection into test cases

•Various testing strategies•Weld in SE mode (test your POJO based logic)•Using Embedded JBoss (test your persistence)•Inside a real container (test your views)

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Recap

•Programming model•Injection, Producers, Events, EJB Services

•Seam modules•Seam Persistence•Validation, Messages, Components, View Actions

•Seam Remoting•Infinispan

•Tools•JBoss Tools•Arquillian•SteamCannon

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Status

•Java EE 6 is final•JBoss AS 6 M5 available

•Seam Alphas available•Faces•Remoting•JMS•i8ln•XML

•http://seamframework.org/Seam3

•Aiming for release later this year

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Q&A