Agile web development Groovy Grails with Netbeans

Agile Web Development with Groovy and Grails Carol McDonald, Java Architect

Objective Overview of the Grails Web Platform

What is Groovy? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Valid Java Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Valid Groovy Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Groovy Way ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is Grails? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Why Grails? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How To Get Started ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],For command line

grails create-app ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],IDE runs the "grails create-app" command Demo

Grails Directory Structure Application name Additional JARs Web application Grail source

Netbeans Grails Project Structure Project name Grail source Additional JARs Web application

Configure for MySQL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MVC and Grails ,[object Object]

grails create-domain-class ,[object Object]

add the domain class attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Groovy with Grails dynamically generates getters and setters and the dynamic methods Item.save(), Item.delete(), Item.list(), Item.get() to retrieve/update data from/to the db table.

Persistence Methods ,[object Object],[object Object],[object Object],[object Object],def item = new Item(name:'Fred') def order = new Order(orderDate: new Date(), item: 'PSP') item. addToOrders (order) item. save ()

Queries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

grails domain class ,[object Object],[object Object],[object Object],Groovy hashmap Address String street String zip static hasMany = [item:Item] 1 M Item String name String description Address address

Scaffolding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Scaffolding ,[object Object],Demo

grails create-controller ,[object Object],[object Object],[object Object],class Item Controller { def index = { redirect(action:list,params:params) } def list = { if(!params.max) params.max = 10 [ itemList: Item.list( params ) ] } def show = {... Actions http://host/catalog/item/list

URL Mappings ,[object Object],[object Object],[object Object],[object Object],static mappings = { "/$controller/$action ? /$id ? " Application Controller Action

grails controller class Item Controller { def index = { redirect(action:list,params:params) } def list = { if(!params.max) params.max = 10 [ itemInstanceList: Item.list ( params ) ] } def show = {... returns an ArrayList of item objects retrieved from the item database table itemInstanceList variable is made available to the view

grails view ,[object Object],<html> <table> <tbody> < g:each in="${ itemInstanceList }" status="i" var=" itemInstance "> <td> ${fieldValue (bean: itemInstance , field:' price ')}</td> </tr> </g:each> </tbody> </table> g:each Groovy Tag loops through each object in the itemInstanceList variable displays the value of the item 's price attribute

grails run-app ,[object Object],[object Object],[object Object],Demo

Summary ,[object Object],[object Object]

http://weblogs.java.net/blog/caroljmcdonald/

Acknowldegement ,[object Object]

[object Object],[object Object],Carol McDonald Java Architect Tech Days 2009

Lots of Books and Online Tutorials

Agile web development Groovy Grails with Netbeans

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