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REST based web applications with Spring 3

Oliver Gierke - Senior Consultant

Agenda

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Intro

What is REST all about?

Recap: @Controller

What‘s new in Spring MVC 3.0?

What‘s beyond Spring MVC

Demo

About

Oliver Gierke - Senior Consultant

OpenSource enthusiast

(OR)Persistence, Web, Integration

ogierke@vmware.com

http://www.olivergierke.de / olivergierke

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Hi! My name is...

SpringSource - a division of VMware

Spring Framework• exhaustive ecosystem

Roo

Groovy / Grails

Tomcat / tc Server / Hyperic

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REST

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The architecture of the web

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Resources

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IdentifiersVerbs

RepresentationsHypermedia

Spring MVC

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Spring MVC

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Model View Controller

Recap: Spring MVC 2.5

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@Controller@Controller@RequestMapping(„/addresses“)public class AddressController {

@RequestMapping(value=“/address“, method = GET) public String showAddress( @RequestParam Long id, Model model) {…}

}

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Other special types

Strongly typed request parameterView name

Strongly typed methods

@RequestMapping(value=“/address“, method = GET)public String showAddress( @RequestParam Long id, Model model) {…}

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What‘s new in Spring MVC 3.0

@PathVariable

Content negotiation

ResponseBody / RequestBody / ResponseStatus

Declarative validation (JSR-303)

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@PathVariable

@RequestMapping(value=“/addresses/{id}“, method = GET)public String showAddress( @PathVariable Long id, Model model) {…}

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Content negotiation

http://myapp.com/addresses/1.xmlhttp://myapp.com/addresses/1.jsonhttp://myapp.com/addresses/1.html

Accept: application/xmlAccept: application/jsonAccept: application/html

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@ResposeBody

@RequestMapping(value=“/addresses/{id}“, method = GET)@ResponseBodypublic Address showAddress( @PathVariable Long id, Model model) {…}

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@ResponseStatus

@ResponseStatus(NOT_FOUND)public class MyException extends RuntimeException {…}

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@ResponseStatus

@RequestMapping(value=“/addresses/{id}“, method = GET)public String showAddress( @PathVariable Long id, Model model) {

if (id == null) throw new MyException(); …}

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@RequestBody

@RequestMapping(value=“/addresses“, method = POST)@ResponseStatus(CREATED)public void createAddress( @RequestBody Address address) {…}

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Declarative Validation

@RequestMapping(value=“/addresses“, method = POST)@ResponseStatus(CREATED)public void createAddress( @RequestBody @Valid Address address) {…}

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What‘s new in Spring MVC 3.0

New data binding and type conversion service

Object-XML-Mapping

HiddenHttpMethodFilter

XML namespace

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Demo

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Where do wego from here?

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Spring Ecosystem

Spring WebFlowSpring Integration

Spring BatchSpring Roo

Spring Security

Spring WebServices

Demo

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Questions

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Resources

Sample: http://github.com/olivergierke/spring-rest

Petcare: http://src.springsource.org/svn/spring-samples/petcare/trunk

Photos: http://www.sxc.hu/

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