Ext GWT Data Loading Models Loaders Examples
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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.
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Ext GWT Data Loading Models Loaders Examples
- 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