Download - Grails & the World of Tomorrow
Grails & the World of Tomorrow
Peter Ledbrook, Developer [email protected] / @pledbrook
© 2012 SpringOne 2GX. All rights reserved. Do not distribute without permission.
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Cloud
NoSQL
CloudCloud
HTML5.js
Social
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HTML5.js
Web sites Applications
Server-side HTMLLow interactivityNo offline
Client-side HTMLHigh interactivityOffline
Wikipedia
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HTML5.js
Web sites Applications
Server-side HTMLLow interactivityNo offline
Client-side HTMLHigh interactivityOffline
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HTML5.js
Web sites Applications
Server-side HTMLLow interactivityNo offline
Client-side HTMLHigh interactivityOffline
GMail
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HTML5.js
Web sites Applications
Server-side HTMLLow interactivityNo offline
Client-side HTMLHigh interactivityOffline
We’re going this way!
Example:
REST + JSON
Backbone.js + Moustache
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Google I/O 2012
Android activations to date
400 million
Apple WWDC 2012
iOS devices sold to date
365 million
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Is this the end for server-side templates?
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NoSQL / Big Data
Data the way you want it!
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NoSQL / Big Data
Everyone has interesting data
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Cloud
Scaling Reduced capital costs
Easier administration
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Cloud
Ephemeral filesystems
Session management
No Multicast
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A typical Grails app
Controller View
HTTP
Service
GORM/Hibernate
Database
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What do these cars have in common?
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Same platform, different components
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Core Grails == Chassis
Plugins == Components
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How can Grails help - Rich UIs?
URL mappings for REST
JSON & XML converters
Resources (for JS & CSS)
zipping, caching, compression
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Static resource handling
App
Kickstart Bootstrap Plugin Shiro UI Plugin
Twitter Bootstrap Plugin
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Scaffolding libraries
> grails install-plugin jquery-mobile-scaffolding> grails install-mobile-templates> grails create-domain-class org.example.Todo
<edit Book.groovy>
> grails generate-all org.example.Todo> grails run-app
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How can Grails help - Social?
oauth { providers { twitter { api = TwitterApi key = 'my-key' secret = 'my-secret' successUri = '/' failureUri = '/' } }}
Simplified OAuth via OAuth plugin:
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How can Grails help - Social?
<oauth:connect provider="twitter"> Connect to Twitter</oauth:connect>
class MyService { def oauthService
def myMethod() { def twitterUsers = oauthService.getTwitterResource( twitterAccessToken, "http://api.yourprovider.com/users/list") ... }}
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How can Grails help - NoSQL?
Accessible NoSQL via GORM
Domain Model
GORM
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How can Grails help - Cloud?
Cache plugin
RedisEhcache
For HTTP sessions, Database Session plugin
Solve the caching problem with the Cache plugin
Database Session plugin
CookieMongoDB
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PaaS deployment
AppRedis Plugin Rabbitmq Plugin
> grails cf-push
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What about horizontal scalability?
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Introducing CQRS
Updates
Views
Concurrency via event bus
Store changes
Separate data stores for queries
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Event bus (Platform Core plugin)
Event Bus
Plugins ApplicationPluginsPlugins
Save entity IndexUpdate
read DBsCall REST
service
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Event bus (Events SI plugin)
Event Bus (SI)
Plugins ApplicationPluginsPlugins
Save entity IndexUpdate
read DBsCall REST
service
AMQP
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Event bus (Events Push plugin)
Event Bus (SI)
Plugins ApplicationPluginsPlugins
Event Bridge
Browser
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grailsTodos sample
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grailsTodos sample
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grailsTodos sample
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grailsTodos sample
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grailsTodos sample
http://grailstodos.cloudfoundry.com/todos/
Try it:
See the code:
http://github.com/smaldini/grailsTodos
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Enabling plugin authors
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More Platform Core
Security API
Who is the current user?
Does the user have a particular role?
Is user permitted to do something?
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More Platform Core
Navigation API
Menu
Application Plugin
Action
Action
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More Platform Core
Config API
Declare config options
Automatic namespacing
Default values & automatic merging
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More Platform Core
Convention API
static searchable = { ... } @Taggable
Convention overrides!
e.g.
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Platform UI
Themes
+
UI tags
e.g. App Info plugin + Bootstrap Kickstart
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Project archetypes?
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SQL database
CRUD
jQuery
Multi page
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SQL for write
REST endpoints
AngularJS
Redis for read
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Events
Web Sockets (with emulation)
Spring Integration
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Summary
• The way applications are architected will change– Websites will still be built (GSP not gone yet)– Not everyone will need the same architecture– Project archetypes and scaffolding!
• No single framework has everything you need• Pick and choose the appropriate components for your
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More info
• w: http://grails.org/• f: http://grails.org/Mailing+Lists
• e: [email protected]• t: pledbrook• b: http://blog.springsource.com/author/peter-ledbrook/
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Q & A
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