Data Loading for Ext GWT

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2 likes•1,474 views

This document discusses loading data in Ext GWT applications. It provides an overview of models, loaders, data proxies, and data readers used to load data from remote sources. Examples are given of using different data proxies like ScriptTagProxy, HttpProxy and RpcProxy. It also shows a paging loader example to load data from the server using paging. The presentation aims to explain the key components and patterns involved in loading and managing remote data in Ext GWT applications.

Ext GWT
Data Loading

DARRELL MEYER, SENCHA
SVEN BRUNKEN, SENCHA

Monday, November 29, 2010

Overview
Conference App
Models
Loaders
Loading Examples
Questions

Monday, November 29, 2010

Conference App

Monday, November 29, 2010

Technology Stack
Ext GWT 2.2.1
GWT 2.1

Java Persistence API (JPA)
Google App Engine (GAE)

RequestFactory
GWT MVP
Dependency Injection with Gin

Download at http://dev.sencha.com/playpen/gxt/conference-app.zip

Monday, November 29, 2010

IDE & Plugins
Eclipse IDE for Java EE Developers (Helios 3.6.1)
http://www.eclipse.org/downloads/

Plugins
Maven Integration for Eclipse
http://m2eclipse.sonatype.org/sites/m2e

Maven Integration for Eclipse WTP Integration
http://m2eclipse.sonatype.org/sites/m2e-extras

Google Eclipse
http://code.google.com/eclipse/

Monday, November 29, 2010

Models & ModelData
Generic data type used throughout Ext GWT
Allows form of introspection
Interface based with default implementation

Monday, November 29, 2010

Change Events & Listeners
Implement ChangeEventSource
Model implements ChangeEventSource
ChangeListeners added to Models
Models Events
Update
Add, Remove, Update TreeModel

Monday, November 29, 2010

BeanModel
Create Model instances from POJOs
Use GWT RPC with non-models
POJOs need to be marked
BeanModelMarker (indirect)
BeanModelTag (direct)
BeanModelLookup & BeanModelFactory
BeanModelReader

Monday, November 29, 2010

Loader DataProxy DataReader

Responsible for loading remote data
Delegates work to DataProxy & DataReader
Interface based with default impls Loader
Supports 3 events
BeforeLoad
Load
LoadException Loader

ListLoader TreeLoader

RemoteSort
PagingLoader
TreeLoader

Monday, November 29, 2010

DataProxy
Retrieve remote content
Any data type supported

DataProxy

HttpProxy MemoryProxy RpcProxy ScriptTagProxy

PagingModel
MemoryProxy

Monday, November 29, 2010

DataReader
Coverts raw data to ModelData instances

DataReader

BeanModel TreeBean TreeModel
JsonReader ModelReader XmlReader
Reader ModelReader Reader

JsonLoad XmlLoad
ResultReader ResultReader

Monday, November 29, 2010

Loading Examples

Monday, November 29, 2010

DataProxy Example
Example uses ScriptTagProxy, HttpProxy, & RpcProxy

Monday, November 29, 2010

DataProxy Example
Deﬁne the data with ModelType
Create DataProxy
Create DataReader
Create Loader

Monday, November 29, 2010

Paging Loader Example
Server implementation using
FilterPagingLoadConﬁg
PagingLoadResult

Monday, November 29, 2010

Thanks!
Twitter @darrellmeyer

Portions of this presentation from the GWT documentation licensed under the Creative Commons Attribution 3.0 License

Monday, November 29, 2010

JohnさんはJRubyおよびApp Engineに関連するオープンソース開発プロジェクトで積極的な活動を進めており、日本国内におけるSlim3（App Engine対応フレームワーク）の急速な普及に注目しています。そこでイベントの第一部では、Google社員の方々や一般の方に向けてSlim3をより知ってもらうため、Slim3の開発者であるひがやすをさんを招いて解説していただきます。さらに今回はJRubyの開発者Charles Nutterさんを招き、同氏が開発を進めている新しい言語Mirahについて解説いただくほか、Johnさんが開発するMirahベースのApp Engine対応WebフレームワークDubiousについて紹介します。

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Data Loading for Ext GWT

1. Ext GWT Data Loading DARRELL MEYER, SENCHA SVEN BRUNKEN, SENCHA Monday, November 29, 2010

2. Overview Conference App Models Loaders Loading Examples Questions Monday, November 29, 2010

3. Conference App Monday, November 29, 2010

4. Technology Stack Ext GWT 2.2.1 GWT 2.1 Java Persistence API (JPA) Google App Engine (GAE) RequestFactory GWT MVP Dependency Injection with Gin Download at http://dev.sencha.com/playpen/gxt/conference-app.zip Monday, November 29, 2010

5. IDE & Plugins Eclipse IDE for Java EE Developers (Helios 3.6.1) http://www.eclipse.org/downloads/ Plugins Maven Integration for Eclipse http://m2eclipse.sonatype.org/sites/m2e Maven Integration for Eclipse WTP Integration http://m2eclipse.sonatype.org/sites/m2e-extras Google Eclipse http://code.google.com/eclipse/ Monday, November 29, 2010

6. Models Monday, November 29, 2010

7. Models & ModelData Generic data type used throughout Ext GWT Allows form of introspection Interface based with default implementation Monday, November 29, 2010

8. Change Events & Listeners Implement ChangeEventSource Model implements ChangeEventSource ChangeListeners added to Models Models Events Update Add, Remove, Update TreeModel Monday, November 29, 2010

9. BeanModel Create Model instances from POJOs Use GWT RPC with non-models POJOs need to be marked BeanModelMarker (indirect) BeanModelTag (direct) BeanModelLookup & BeanModelFactory BeanModelReader Monday, November 29, 2010

10. Loaders Monday, November 29, 2010

11. Loader DataProxy DataReader Responsible for loading remote data Delegates work to DataProxy & DataReader Interface based with default impls Loader Supports 3 events BeforeLoad Load LoadException Loader ListLoader TreeLoader RemoteSort PagingLoader TreeLoader Monday, November 29, 2010

12. DataProxy Retrieve remote content Any data type supported DataProxy HttpProxy MemoryProxy RpcProxy ScriptTagProxy PagingModel MemoryProxy Monday, November 29, 2010

13. DataReader Coverts raw data to ModelData instances DataReader BeanModel TreeBean TreeModel JsonReader ModelReader XmlReader Reader ModelReader Reader JsonLoad XmlLoad ResultReader ResultReader Monday, November 29, 2010

14. Loading Examples Monday, November 29, 2010

15. DataProxy Example Example uses ScriptTagProxy, HttpProxy, & RpcProxy Monday, November 29, 2010

16. DataProxy Example Deﬁne the data with ModelType Create DataProxy Create DataReader Create Loader Monday, November 29, 2010

17. Paging Loader Example Server implementation using FilterPagingLoadConﬁg PagingLoadResult Monday, November 29, 2010

18. Questions? Monday, November 29, 2010

19. Thanks! Twitter @darrellmeyer Portions of this presentation from the GWT documentation licensed under the Creative Commons Attribution 3.0 License Monday, November 29, 2010

Data Loading for Ext GWT

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