初篇学习potomac-framework

于 2011-01-22 01:19:02 发布 · 233 阅读

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#Flex #UI #Eclipse #OSGI #企业应用

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本文介绍Potomac框架的基础知识及其开发环境搭建流程。Potomac框架借鉴了OSGI和Eclipse RCP技术，适用于企业级Flex模块开发。文中详细说明了安装配置步骤，并提供了创建项目的示例。

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注：本文只作本人记录，不作为技术分享。

固定链接： http://www.nethref.com/?p=281

官方网址：http://www.potomacframework.org/

下载地址：http://www.potomacframework.org/downloads/

论坛讨论：http://forum.potomacframework.org/

API文档：http://www.potomacframework.org/1.0beta/asdoc

学习文档：http://www.potomacframework.org/documentation/

potomac-framework源于目前多种技术的设计思想，类似于OSGI和Eclipse RCP技术，适合做企业级Flex模块块的开发，但目前最新版是Beta 0.8版，只建议学习研究，不做实际项目应用。

第一、Flex的potomac-framework中一个模块化的框架，参考OSGI的原理，而其构建成用户的UI界面，则是由”parts(组件)“拼装而成。这点相信有Eclipse的使用经验的朋友都明白。

第二、potomac-framework是一种通用的商用应用Flex程序框架，拥有框架的依赖注入及支持反射和可扩展机制。

第三、总体来说,potomac的设计思想是很优秀的，是值得推荐理由。但目前其拥的多种机制都还不成熟。如果企业或团体需要应用，则需要自己实现他的扩展机制。

如何搭建potomac的开发环境，在官网上已有详细的文档体现。具体页面为：http://www.potomacframework.org/documentation/getting-started/，但我还是把内容再贴出来吧。

1、做好环境搭建准备

安装Java SDK

下载 Potomac 立即下载

安装好Flash Builder4或Eclipse

安装Potomac基于Eclipse的插件，老版本Eclise放在Plugins中而新版本的放在Dropins，插件在下载好的PhotoMac包中有为”com.elementriver.potomac.sdk_1.0.0_vXXXXXX.jar“

2、然后配制PhotoMac的开发平台

在Window下的Perferences中,指定Potomac解压位置中的targetPlatform目录。

不清楚可参考：http://www.potomacframework.org/documentation/modularity/about-the-target-platform/

接下来就是创建应用了，这里我就不多说了，英语不难，大家都看的懂。把这例子跑起来后再细读官方文档和API吧。

Create a Bundle
Potomac projects are composed of bundles (i.e. Potomac modules). Bundles are hosted within Flex Library Projects.

Create a new Flex Library Project.

Once the library project is created, you need to add the Potomac Bundle Nature to it.

Right-click on the project and select the new “Add Potomac Bundle Nature”.

When that is complete, you should notice that Potomac created a new file named “bundle.xml” in the project’s root folder.

Configure the Bundle
Now you’ll need to perform some standard configuration to the bundle. Open the bundle.xml file.

In the Bundle XML Editor, add the two Potomac bundles, potomac_core and potomac_ui, to the dependencies list. Click save.

Add a Sample Component
You’ll need to add at least on UI component to see anything on screen. Here’s a simple one you can cut-n-paste in called MyComponent.mxml:

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300">
	<mx:Metadata>
		[Page(id="hellopage",title="Hello World")]
		[Part(id="hellopart",page="hellopage",
		      folder="default",title="Hello World")]		
	</mx:Metadata>
	<mx:Label x="10" y="10" text="Hello World"/>
</mx:Canvas>

Create an Application
A Potomac application is a normal Flex Project with the Potomac Application Nature. Create a Flex Project, then right-click on the project and select “Add Potomac Application Nature”.

Configure the Application
Open the newly created appManifest.xml. This file is used to configure your Potomac application.

Add potomac_ui, potomac_ui_templates_dark, and your newly created bundle to the manifest’s bundle list.

Set potomac_ui and potomac_ui_templates_dark to load as RSLs.

Now select the potomac_dark template (it became available after we included the potomac_ui_templates_dark bundle). Click save.

Lastly, you’ll need one Potomac stub to the application’s main mxml file. Simply add an instance of the PotomacInitializer like:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
	layout="absolute" xmlns:derived="potomac.derived.*">
	<derived:PotomacInitializer/>
</mx:Application>