�??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#31881;&#23273;&#31934;&#21697;&#19968;&#21306;&#20108;&#21306;&#19977;&#21306;&#22312;&#32447;&#35266;&#30475;&#44;&#22269;&#20135;&#19968;&#21306;&#20108;&#21306;&#19977;&#21306;&#20813;&#36153;&#44;&#27431;&#32654;&#35270;&#39057;&#31119;&#21033;</title><link>http://www.aygfsteel.com/yangbutao/</link><description /><language>zh-cn</language><lastBuildDate>Sun, 18 May 2025 23:34:12 GMT</lastBuildDate><pubDate>Sun, 18 May 2025 23:34:12 GMT</pubDate><ttl>60</ttl><item><title>���析扩展点（Extension Point�Q?/title><link>http://www.aygfsteel.com/yangbutao/archive/2007/09/27/148500.html</link><dc:creator>阿不</dc:creator><author>阿不</author><pubDate>Thu, 27 Sep 2007 01:09:00 GMT</pubDate><guid>http://www.aygfsteel.com/yangbutao/archive/2007/09/27/148500.html</guid><wfw:comment>http://www.aygfsteel.com/yangbutao/comments/148500.html</wfw:comment><comments>http://www.aygfsteel.com/yangbutao/archive/2007/09/27/148500.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/yangbutao/comments/commentRss/148500.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/yangbutao/services/trackbacks/148500.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 扩展�Q�Extension�Q�是很多可扩展项目中一个关键的机制�Q�可以利用扩展向�q�_����d��新功能。但是扩展不能随意地创徏�Q�必���L��照扩展点�Q�Extension Point�Q�定义的规范�q�行明确的声明，�q�_��才能识别�����些扩展。所谓扩展点�Q�就是系�l�定义出来可以让你扩展的地方�Q�可以认为是一些扩展的契约�Q�而扩展，�q�是你对�q�些扩展点的实现�Q�当然你自己的插件也可以定义扩展点供别的开发�h员扩展�?nbsp;&nbsp;<a href='http://www.aygfsteel.com/yangbutao/archive/2007/09/27/148500.html'>阅读全文</a><img src ="http://www.aygfsteel.com/yangbutao/aggbug/148500.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/yangbutao/" target="_blank">阿不</a> 2007-09-27 09:09 <a href="http://www.aygfsteel.com/yangbutao/archive/2007/09/27/148500.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>OSGI Module&amp;lifecycle</title><link>http://www.aygfsteel.com/yangbutao/archive/2007/09/24/147771.html</link><dc:creator>阿不</dc:creator><author>阿不</author><pubDate>Mon, 24 Sep 2007 05:26:00 GMT</pubDate><guid>http://www.aygfsteel.com/yangbutao/archive/2007/09/24/147771.html</guid><wfw:comment>http://www.aygfsteel.com/yangbutao/comments/147771.html</wfw:comment><comments>http://www.aygfsteel.com/yangbutao/archive/2007/09/24/147771.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/yangbutao/comments/commentRss/147771.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/yangbutao/services/trackbacks/147771.html</trackback:ping><description><![CDATA[<div style="text-indent: 36.75pt"><strong><span style="font-size: 14pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; OSGI Module&amp;lifecycle</span></strong></div>
<div style="text-indent: 139.15pt"><strong>&nbsp;</strong></div>
<div style="text-indent: 36.75pt">OSGI概念中主要分��Z��Bundle和Service�Q�可以认为Bundle是一个模块的���理器，主要是通过BundleActivator���理模块的生命周期，而Service则是�q�个模块可暴露对外的服务对象�Q�这里体��C��OSGI和传�l�的Plugin Framework不同的一个地方，���理和静态结构分开�Q�在OSGI中通过在manifest.mf文�g中增加一些内�Ҏ��发布Bundle�Q�在其中描述了Bundle的提供商、版本、唯一ID、classpath、暴露对外的包、所依赖的包�Q�每个Bundle拥有自己的ClassLoader以及context�Q�通过context可进行服务的注册、卸载等�Q�这些操作都会通过事�g机制�q�播�l�相应的其他的Bundle�Q�一般来说都为通过在Bundle中编写初始需要注册的服务的方法来完成Bundle可供外部使用的服务的暴露功能�Q�如需要调用其他Plugin提供的服务可通过context的getServiceReference先获取Service的句柄，再通过context.getService(ServiceReference)的方法获取Service的实体�?/div>
<div style="text-indent: 15.75pt">前一�D�|��间对osgi的service层做了介�l�，下面介绍module和lifecycle层，在这里主要介�l�lifecycle</div>
<div>�pȝ��框架对bundle的生命周期进行了���理�?/div>
<div>osgi生命周期的管理，覆盖到bundle的安装，启动�Q�停止，更新�Q�卸载，和监控这么一个过�E��?/div>
<div style="margin: 13pt 0cm"><strong><font size="5"><span style="font-weight: normal; font-size: 10.5pt; line-height: 173%">Bundle</span><span style="font-weight: normal; font-size: 10.5pt; line-height: 173%">的生命周�?/span></font></strong></div>
<div>下面是bundle的lifecycle的类�?/div>
<div><img height="512" alt="" src="http://gocom.primeton.com/uploads/FCKUserFiles/Image/www.GIF" width="640" /></div>
<div>下面详细介绍bundle的几个对�?/div>
<div align="right">&nbsp;</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: -21pt"><span>l<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bunlde 标识</div>
<div>&nbsp;Identifier</div>
<div>&nbsp;Location</div>
<div>&nbsp;symbolicName</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: -21pt"><span>l<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>bundle的状�?/div>
<div><span>&nbsp; </span>状态�{换图</div>
<div><img alt="" src="http://gocom.primeton.com/uploads/FCKUserFiles/Image/eee.GIF" /></div>
<div style="margin: 0cm 0cm 0pt 26.25pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>bundle的安装一般有两种方式�Q?/div>
<div style="text-indent: 15.75pt">通过另外一个bundle的bundlecontext来完�?/div>
<div style="text-indent: 15.75pt">通过命��o行的形式�Q�比如系�l�bundle一般是�q�样的）来完成的</div>
<div style="margin: 0cm 0cm 0pt 26.25pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bundle的解析（一般是在启动过�E�中完成的）</div>
<div style="margin: 0cm 0cm 0pt 15.75pt">�Ҏ��bundle的定义，创徏��Z��版本的module�Q?span style="font-size: 10pt; color: black">ModuleDefinition</span><span style="font-size: 10pt; color: black">�Q?/span><span style="font-size: 10pt; color: black">ContentLoader</span><span style="font-size: 10pt; color: black">�Q?/span><span style="font-size: 10pt; color: black">Wire</span>�Q?/div>
<div style="margin: 0cm 0cm 0pt 26.25pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bundle的启动，��p��bundle的调用start api来完成的</div>
<div style="text-indent: 5.25pt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>�q�里包含创徏该bundle的上下文�Q�BundleContext�Q?/div>
<div style="margin: 0cm 0cm 0pt 47.25pt; text-indent: -42pt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>创徏该bundle的activator�Q�可以在activator里进行与该bundle相关的service的注册，bundlelistener�Q�servicelistener ,frameworklistener的注册以及安装其他的bundle.�{?</div>
<div style="margin: 0cm 0cm 0pt 47.25pt; text-indent: -42pt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>是否要立卌���发该activator�Q�需要根据该bundle的activator policy来决定；在用bundle获取resource的时候，采取解析bundle�Q�才创徏该bundle的classloader和activate该bundle。这栯���节省启动的时��_��实现了懒加蝲�?/div>
<div style="margin: 0cm 0cm 0pt 47.25pt; text-indent: -42pt">下图描述了bundle的启动过�E�中的状态变�?/div>
<div style="margin: 0cm 0cm 0pt 47.25pt; text-indent: -42pt"><img height="512" alt="" src="http://gocom.primeton.com/uploads/FCKUserFiles/Image/qq.GIF" width="640" /></div>
<div style="margin: 0cm 0cm 0pt 26.25pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bundle的更�?/div>
<div style="margin: 0cm 0cm 0pt 5.25pt">Bundle的更斎ͼ�是从一个版本到另一个版本的�q�移�q�程</div>
<div style="margin: 0cm 0cm 0pt 5.25pt">���程如下�Q?/div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>1�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>���查bundle的状�?/div>
<div style="margin: 0cm 0cm 0pt 18pt">如果是uninsalled�Q�抛出异�?/div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>2�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font>�Q�但是不改变持久化的状�?/span></span>Stop bundle</div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>3�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>版本的修�?/div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>4�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>更改bundle的时间戳�Q�状态设�|�成installed</div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>5�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>发送unresolved事�g�l�bundle</div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>6�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>把该bundle的老的module做一个removal标记�Q�表�C�Z��可用</div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>7�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>发送updated事�g�l�bundle</div>
<div style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt"><span>8�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>启动�Q�start�Q�bundle</div>
<div><span>&nbsp;&nbsp;&nbsp; </span></div>
<div style="margin: 0cm 0cm 0pt 26.25pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bundle的停�?/div>
<div style="margin: 0cm 0cm 0pt 27pt; text-indent: -18pt"><span>1�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>把bundle的持久化状态设�|�成inactive</div>
<div style="margin: 0cm 0cm 0pt 27pt; text-indent: -18pt"><span>2�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>���查bundle的状�?/div>
<div style="margin: 0cm 0cm 0pt 18pt">如果状态是Installed�Q�Resolved�Q�就�q�回</div>
<div style="margin: 0cm 0cm 0pt 18pt">如果是uninstalled�Q�抛出异�?/div>
<div style="margin: 0cm 0cm 0pt 18pt">如果是starting�Q�stopping�Q�抛异常</div>
<div style="margin: 0cm 0cm 0pt 18pt">如果ACTIVE�Q�把bundle的状态设�|�成stopping�Q�发stopping事�g跟响应的bundle</div>
<div style="margin: 0cm 0cm 0pt 27pt; text-indent: -18pt"><span>3�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>调用该bundle的activator的stop操作�Q�清理分配的资源</div>
<div style="margin: 0cm 0cm 0pt 27pt; text-indent: -18pt"><span>4�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>清除bundle的上下文</div>
<div style="margin: 0cm 0cm 0pt 27pt"><span style="font-size: 10pt; color: black">清理�?/span><span style="font-size: 10pt; color: black">bundle</span><span style="font-size: 10pt; color: black">注册�?/span><span style="font-size: 10pt; color: black">service</span></div>
<div style="margin: 0cm 0cm 0pt 27pt"><span style="font-size: 10pt; color: black">释放�?/span><span style="font-size: 10pt; color: black">bundle</span><span style="font-size: 10pt; color: black">用到�?/span><span style="font-size: 10pt; color: black">service</span></div>
<div style="margin: 0cm 0cm 0pt 27pt"><span style="font-size: 10pt; color: black">删除�?/span><span style="font-size: 10pt; color: black">bundle</span><span style="font-size: 10pt; color: black">注册�?/span><span style="font-size: 10pt; color: black">listener&nbsp;&nbsp; </span></div>
<div style="margin: 0cm 0cm 0pt 27pt; text-indent: -18pt"><span>5�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>该bundle的状态返回到resolved状�?/div>
<div style="margin: 0cm 0cm 0pt 27pt; text-indent: -18pt"><span>6�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>发stopped事�g�l�该bundle</div>
<div style="margin: 0cm 0cm 0pt 5.25pt">&nbsp;</div>
<div style="margin: 0cm 0cm 0pt 26.25pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bundle的卸�?/div>
<div style="margin: 0cm 0cm 0pt 23.25pt; text-indent: -18pt"><span>1�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>Stop bundle</div>
<div style="margin: 0cm 0cm 0pt 23.25pt; text-indent: -18pt"><span>2�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>把该bundle从缓存中删除</div>
<div style="margin: 0cm 0cm 0pt 23.25pt; text-indent: -18pt"><span>3�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>把该bundle攑օ�uninstall �c�d���?/div>
<div style="margin: 0cm 0cm 0pt 23.25pt; text-indent: -18pt"><span>4�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>该bundle状态设�|�成uninstalled</div>
<div style="margin: 0cm 0cm 0pt 23.25pt; text-indent: -18pt"><span>5�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>触发bundle的uninstall事�g</div>
<div style="margin: 0cm 0cm 0pt 23.25pt; text-indent: -18pt"><span>6�Q?span style="font: 7pt 'Times New Roman'"><font size="3">&nbsp; </font></span></span>看是否有以来该bundle的module�Q�如果没有则垃圾回收</div>
<div style="margin: 13pt 0cm"><strong><font size="5">Listener和事件机�?span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></font></strong></div>
<div>关于�q�一部分功能和用法已在上一���service层里已经做了介绍�Q�这里只做一下简单的�|�列</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Framework</div>
<div style="margin: 0cm 0cm 0pt 21pt">FrameworkListener�Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt">注册旉����Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt">触发旉����Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt">作用�Q�OSGI environment</div>
<div style="text-indent: 10.5pt">&nbsp;FrameworkEvent: type�Q�bundle�Q�throwable</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Bundle</div>
<div style="text-indent: 21.75pt"><span style="font-size: 10pt; color: black">BundleListener</span></div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">注册旉����Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">触发旉����Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">作用�Q?span style="font-size: 10pt; color: black">a bundle lifecycle change.</span></div>
<div style="text-indent: 21.75pt">BundleEvent: Bundle,type</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: -21pt"><span>&#252;<span style="font: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>Service</div>
<div style="margin: 0cm 0cm 0pt 21pt">ServiceListener</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">注册旉����Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">触发旉����Q?/div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">作用�Q�a service lifecycle change.</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">ServiceEvent:serviceReference ,type</div>
<div style="margin: 0cm 0cm 0pt 21pt; text-indent: 5.25pt">&nbsp;</div>
<table style="border-right: medium none; border-top: medium none; border-left: medium none; width: 464.4pt; border-bottom: medium none; border-collapse: collapse" cellspacing="0" cellpadding="0" width="619" border="1">
    <tbody>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 113.25pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="151">
            <div>资源</div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div>事�g�c�d��</div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; border-top: windowtext 1pt solid; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div>触发时机</div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 113.25pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="151" rowspan="6">
            <div>Framework</div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: black">STARTED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div><span style="font-size: 10pt; color: black">Framework</span><span style="font-size: 10pt; color: black">启动完成</span></div>
            <div><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Framework has started after all installed bundles that are marked to be started have been started and the Framework has reached the intitial start level.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: #0000c0">ERROR</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">There was an error associated with a bundle.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: #0000c0">PACKAGES_REFRESHED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf">
            <div><span style="font-size: 10pt; color: black">Framework has completed the refresh &nbsp;packages operation initiated by a call to the</span></div>
            <span style="font-size: 10pt; color: black">PackageAdmin.refreshPackages method.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: #0000c0">STARTLEVEL_CHANGED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf">
            <div><span style="font-size: 10pt; color: black">the Framework has completed changing the active start level initiated by a call to the StartLevel.setStartLevel</span></div>
            <span style="font-size: 10pt; color: black">method.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: #0000c0">WARNING</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">There was a warning associated with a bundle.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">INFO</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">There was an informational event associated with a bundle.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 113.25pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="151" rowspan="8">
            <div>Bundle</div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: #0000c0">INSTALLED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle has been installed.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">STARTED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle has been started.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">STOPPED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle has been stopped.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">UNINSTALLED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle has been uninstalled.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">RESOLVED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle has been resolved.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">UNRESOLVED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle has been unresolved.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">STARTING</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle is about to start.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">STOPPING</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The bundle is about to stop.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; padding-bottom: 0cm; border-left: windowtext 1pt solid; width: 113.25pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="151" rowspan="4">
            <div>Service</div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; background: silver; color: #0000c0">REGISTERED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">This service has been registered.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">MODIFIED</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf"><span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">The properties of a registered service have been modified.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div><em><span style="font-size: 10pt; color: #0000c0">UNREGISTERING</span></em></div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left"><span style="font-size: 10pt; color: #3f5fbf">&nbsp;<span lang="EN-US" style="font-size: 10pt; color: black; font-family: 'Courier New'; mso-font-kerning: 0pt">This service is in the process of being unregistered.<O:P></O:P></span></span></div>
            <div align="left">&nbsp;</div>
            <div align="left"><span style="font-size: 10pt; color: black">
            <div><span style="font-size: 10pt; color: black">If a bundle is using a service that is &lt;code&gt;UNREGISTERING&lt;/code&gt;, the</span></div>
            <div><span style="font-size: 10pt; color: black">&nbsp;&nbsp;&nbsp; &nbsp;bundle should release its use of the service when it receives this event.</span></div>
            <div><span style="font-size: 10pt; color: black">&nbsp;&nbsp;&nbsp; &nbsp;If the bundle does not release its use of the service when it receives</span></div>
            <div><span style="font-size: 10pt; color: black">&nbsp;&nbsp;&nbsp; &nbsp;this event, the Framework will automatically release the bundle's use of</span></div>
            <span style="font-size: 10pt; color: black">&nbsp;&nbsp;&nbsp; &nbsp;the service while completing the service unregistration operation.</span></span></div>
            </td>
        </tr>
        <tr>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 134pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="179">
            <div>&nbsp;</div>
            </td>
            <td style="border-right: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; border-left-color: #ece9d8; padding-bottom: 0cm; width: 217.15pt; border-top-color: #ece9d8; padding-top: 0cm; border-bottom: windowtext 1pt solid; background-color: transparent" valign="top" width="290">
            <div align="left">&nbsp;</div>
            </td>
        </tr>
    </tbody>
</table>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div><span>&nbsp;&nbsp; </span></div>
<div style="margin: 13pt 0cm"><strong><font size="5">资源的查�?/font></strong></div>
<div>几点说明<br />
�pȝ��启动时候，会把所有职责的兌���关系wire��h��</div>
<div>�q�且创徏核心的查找资源policy</div>
<div>�q�有���是有的module可以攑֜�resolve阶段可以攑ֈ�查找资源的时候进行，实现懒加载的功能</div>
<div>&nbsp;</div>
<div>1.查找资源的核心类�Q�分发中心，所有的调度逻辑都在�q�里</div>
<div>2.所有的资源查找都代理到该核心类�Q�有点象代理的方�?/div>
<div>3.module的修改，�q�里会实时的得到更新�Q�通过注册listener�Q?/div>
<div>资源的查找：在本bundle的classloader范围内，�q�行class的查找，资源加蝲的顺序可以参见规�?/div>
<div>下面是类查找的类�?/div>
<div><img alt="" src="http://gocom.primeton.com/uploads/FCKUserFiles/Image/ss(1).gif" /></div>
<div>&nbsp;</div>
<div>该bundle的Classloader在bundle的resolve阶段���创建好�?/div>
<div>关于bundle的说明定义中的import export详见规范</div>
<div style="margin: 13pt 0cm"><strong><font size="5">�pȝ��Bundle的启动过�E?/font></strong></div>
<div>1�Q�系�l�bundle由框架启动，�q�且只启动一��?/div>
<div>2�Q?创徏服务的注册中心，该中心作为各�U�事件的分发场所�?/div>
<div>3�Q?创徏核心的查找资源的policy�Q�加入resolver listener到该policy�Q�可以在module解析后，得到通知更新bundle的状�?/div>
<div>4�Q?初始化事件分发器</div>
<div>5. 在加载其他的bundle之前�Q�创建系�l�的bundle负责容器相关的service�Q�resolve�pȝ��bundle�Q�创建系�l�bundle的activator�Q�创建bundle的上下文�Q��ƈ触发activator</div>
<div>6. 安装其他的bundle</div>
<div>7&nbsp;触发�pȝ��bundle的started事�g�Q�标志系�l�bundle启动完成</div>
<div>8. 触发框架的started旉����Q�标志框架启动完�?/div>
<img src ="http://www.aygfsteel.com/yangbutao/aggbug/147771.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/yangbutao/" target="_blank">阿不</a> 2007-09-24 13:26 <a href="http://www.aygfsteel.com/yangbutao/archive/2007/09/24/147771.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>OSGI 服务层探�I?/title><link>http://www.aygfsteel.com/yangbutao/archive/2007/08/14/136620.html</link><dc:creator>阿不</dc:creator><author>阿不</author><pubDate>Tue, 14 Aug 2007 03:51:00 GMT</pubDate><guid>http://www.aygfsteel.com/yangbutao/archive/2007/08/14/136620.html</guid><wfw:comment>http://www.aygfsteel.com/yangbutao/comments/136620.html</wfw:comment><comments>http://www.aygfsteel.com/yangbutao/archive/2007/08/14/136620.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/yangbutao/comments/commentRss/136620.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/yangbutao/services/trackbacks/136620.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: OSGI的框架很好的解决了模块动态的更新�Q�部�|Ԍ��以及解决他们之间的依赖关�p?<br>的问题，更够搭徏动态化的系�l�可以说是OSGI在SCA的部�|�策略上的一�U�很好的参考实现�?<br>&nbsp;&nbsp;<a href='http://www.aygfsteel.com/yangbutao/archive/2007/08/14/136620.html'>阅读全文</a><img src ="http://www.aygfsteel.com/yangbutao/aggbug/136620.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/yangbutao/" target="_blank">阿不</a> 2007-08-14 11:51 <a href="http://www.aygfsteel.com/yangbutao/archive/2007/08/14/136620.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                                                                    <footer>
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