Getting Started

with Spring 3

By Josh Long

Agenda

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who am I?

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overview of the latest and greatest in Spring 3

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why should you care?

Who am I?

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Lead Author

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“Spring Enterprise Recipes”

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“Spring Recipes, 2nd Edition”

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Editor on Infoq.com

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Blogger on Artima.com

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JCP member

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International speaker / authority on all things Spring-y

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(and bouncy)

Who am I?

Most notably, I’m very fortunate
and proud to be a fellow…

… employee:

[e-mail]

Java 5: Generics

ApplicationContext

Java 5: Generics

ApplicationContext

Java 5: Generics

ApplicationContext

Java 5: Generics

ApplicationContext Events

Java 5: Generics

ApplicationContext Events

...

Java 5: Executors

Java

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j.u.concurrent.AbstractExecutorService

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j.u.concurrent.DelegatedExecutorService

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j.u.concurrent.DelegatedScheduledExecutorService

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j.u.concurrent.FinalizableDelegatedExecutorService

Java 5: Executors

Spring

o.s.core.task.support.

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ConcurrentExecutorAdapter

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o.s.scheduling.concurrent.

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ConcurrentTaskScheduler

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o.s.core.task.support.

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ExecutorServiceAdapter

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o.s.jca.work.glassfish.

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GlassFishWorkManagerTaskExecutor

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o.s.jca.work.jboss.

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JBossWorkManagerTaskExecutor

Java 5: Scheduled Methods

Java 5: Scheduled Methods

...

Java 5: Async Methods

SpEL

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History in Spring Batch Step Scope

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History in Spring.NET

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…

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Andy Clement’s a rockstar

SpEL: what can it do?

'Hello Shopzilla!'
'ceci n''est pas une String'
1
true

{

Literal values:

SpEL: what can it do?

new String(
'Hello Shopzilla, again!')

new com.shopzilla.Cat(
'Felix')

{

construction

SpEL: what can it do?

'felix'.toUpperCase()

T(java.lang.Math).random()

{

method invocation

SpEL: what can it do?

1 > 2

T(java.lang.Math).random() > .5 ?
'She loves Me' :
'She loves me not'

{

Relational operators

SpEL: what can it do?

myArray[1]

myCollection[1]

MyMap['Shopzilla']

{

collections

SpEL: what can it do?

myArray.?[#this < 10]

myMap.?[value.equals('brie')]

{

selection

SpEL: what can it do?

collectionOfCats.![name]

mapOfProducts.![value.id]

{

projection

SpEL: what can it do?

systemProperties['user.home']

service.client.soTimeout

{

references

SpEL: what can it do?

SpEL: what can it do?

SpEL: what can it do?

SpEL: what can it do?

Annotations

Choices, Choices...

Annotations:

Pros:

Compact, where they apply
Type safe

Cons:

Not always applicable
Not self documenting because the annotations

are interspersed in your code

Choices, Choices...

XML:

Pros:

Compact, where schema applies
Self documenting (one artifact to rule them all)

Cons:

Spring XML support isn't particularly good unless

you're using IntelliJ, Netbeans, Vi, Emacs, JEdit,
Butterflies, JDeveloper, older builds of JBuilder...

Configuration is harder to unit test

(and definitely a place where you should
unit test)

Java Config

Java Config

Java Config

Java Config

My Code Doesn’t Compile!

There is no more spring.jar.

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(use spring-core.jar, spring-context.jar, etc..)

There is no more spring-agent.jar

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(use spring-instrument.jar)

Spring MVC

Spring MVC

Pretty Annotations for General MVC Goodness

Spring MVC

JSR 303 Validation API

(spearheaded by that other middleware

company, whose name rhymes with “JToss”)

Spring MVC : REST Remix

Spring MVC

<filter>
<filter-name>etagFilter</filter-name>
<filter-class>org.springframework.web.filter.ShallowEtagHeaderFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>etagFilter</filter-name>
<servlet-name>petclinic</servlet-name>
</filter-mapping>

Other Niceties

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Embedded Database Support:

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o.s.jdbc.datasource.embedded

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XPathTemplate

Deprecated

Very little, actually…

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Apache OJB support (awww.)

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Native Toplink Support (The JPA provider’s still supported)

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Spring MVC base controllers

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Junit 3 Testing support

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Commons Attributes Support

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WebLogic 8.1 and WebSphere 5.1

Summary

Spring 3 is an easy upgrade

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Simplifies Component code even further

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Spring 3 is the baseline for other projects going forward:

Spring BlazeDS
Spring Security
Spring Batch
Spring Integration
Spring MVC

Spring 3 is an evolution,

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not a revolution – it's 99% backwards compatible