Clients of ValueStore subscribe to particular Properties of particular Ids, and values and validation errors are pushed into them asynchronously as they become available. Typically the code to set up these subscriptions is generated around UiBinder templates.
Contents contributed and discussions participated by Esfand S
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In a nutshell: RequestFactory is a scheme for referring to server side entities via Id and Property objects. It relies upon ValueStore, which is a more general system for dealing with data binding and client side validation in general.
GWT and Spring - with Spring Web MVC or without it? - Google Web Toolkit | Google Groups - 0 views
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MVC implies that the server handles much of the view - with a GWT application the server is reduced to a glorified DAO. All you really need is integrate services from the backend into the frontend. What we really missing is something like RMI for the browser - GWT's RPC is as good as it gests for this purpose and and libraries like the GWT-SL allow you to directly publish Spring managed POJOs as services over RPC into the client.
What's Coming in GWT 2.1? - Google Web Toolkit - Google Code - 0 views
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The MVP Framework is an app framework that makes it easy for you to connect Data Presentation Widgets with backend data. Using this framework you create views that are focused on displaying data, Activities and an ActivityManager which are the "presenters", responsible for handling self-contained actions, and RequestFactories that fetch and propagate model changes throughout your app. To make developing apps of this style easier, the 1.1 M1 release of Spring Roo, can generate and maintain the boilerplate code associated with connecting your app's components with GWT's MVP Framework.
MKDev » Blog Archive » Comments on GWT MVP - Technical yabberings from me to you - 1 views
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keeping History management abstracted in it’s own right
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the need for Presenters to be capable of responding to History tokens
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Presenters are decoupled from token managemen
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Feedback on "Large scale app development MVP article" - Google Web Toolkit | Google Groups - 0 views
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It however clarify things about how Google sees MVP in GWT. They're even adding some MVP "framework" to GWT 2.1 (IsWidget and Activities, where an Activity is more or less your presenter, from what I understood).
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RequestFactory on the other hand is a new thing for efficient CRUD operations on entity objects, which plugs more-or-less directly into the new Data widgets. Those widgets do blur the line a bit, but they're not really about presentation "logic", and they're somehow MVP- based themselves.
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Feedback on "Large scale app development MVP article" - Google Web Toolkit | Google Groups - 1 views
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There are a few things that you should keep in mind before you try to understand the MVP pattern 1. You don't have reflection or observer/observable pattern on the client side. 2. Views depend on DOM and GWT UI Libraries, and are difficult to mock/emulate in a pure java test case Now, to answer some of your questions
Feedback on "Large scale app development MVP article" - Google Web Toolkit | Google Groups - 0 views
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There are a few things that you should keep in mind before you try to understand the MVP pattern 1. You don't have reflection or observer/observable pattern on the client side. 2. Views depend on DOM and GWT UI Libraries, and are difficult to mock/emulate in a pure java test case Now, to answer some of your questions
Overview (Google Web Toolkit Javadoc) - 1 views
Google integrating MVP tools in GWT 2.1 M1... - GWTP | Google Groups - 1 views
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from what it seems to me the GWT 2.1 MVP is quite different than GWTP (and from GWT-MVP), and is not targeted to the same audience. I would say it is targeted to developers who want to develop Spring-GWT applications in a Grails/RoR way.
What's Coming in GWT 2.1? - Google Web Toolkit - Google Code - 1 views
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the data presentation widgets use a 'flyweight' design. Rather than being a container of other widgets, which can tend to be heavy, they build up chunks of HTML that is injected into the DOM. This not only speeds up initialization, but also reduces the event handling overhead that can slow down user experience when there are hundreds of widgets within a view.
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The MVP Framework is an app framework that makes it easy for you to connect Data Presentation Widgets with backend data. Using this framework you create views that are focused on displaying data, Activities and an AcivityManager which are the "presenters", responsible for handling self-contained actions, and RequestFactories that fetch and propagate model changes throughout your app.
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To make developing apps of this style easier, the 1.1 M1 release of Spring Roo, can generate and maintain the boilerplate code associated with connecting your app's components with GWT's MVP Framework.
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ValueStoreAndRequestFactory - google-web-toolkit - Discussion of ValueStore and Request... - 1 views
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Databinding is about making two properties in sync. The target property could be a JPA entity, but also another widget property. From a Databinding framework perspective, a JPA entity object of any RPC interface should not be tied to the framework.
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The intent is that ValueBox? would also be useful for data binding of plain old client side JavaBeans?, without any need for the Id and Property classes. I can define a ValueBox? interface tied to a set of bean classes and have it move their fields to and from HasValue? instances, enforcing validations in the process. I can set up this binding myself via calls like valueBox.setSubcription(bean, fieldNameString). Or I can GWT.create an EditorSupport? object to make those calls for me (which is why they didn't appear in the sketch).
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Re: why re-invent a wheel, we want our new data backed widgets to play very nice in an asynchronous world — I'll tell you what values I want, you push them into me when they show up, and as they get updated. My impression of the existing frameworks is that they don't play naturally in that world.
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Esfand S