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29.4 组件服务管理工具
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C#高级编程（第3版）【全文连载】
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29.4 组件服务管理工具
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2006-10-13 14:41:00
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<div style='float:left;width:49%'>·<a href='100165753.htm'>29.3 部署</a></div><div style='float:right;width:49%'>·<a href='100165754.htm'>29.3.1 自动部署</a></div><div style='float:left;width:49%'>·<a href='100165755.htm'>29.3.2 手工部署</a></div><div style='float:right;width:49%'>·<a href='100165757.htm'>29.5 客户应用程序</a></div><div style='float:left;width:49%'>·<a href='100165758.htm'>29.6 事务处理</a></div><div style='float:right;width:49%'>·<a href='100165759.htm'>29.6.1 ACID属性</a></div></div>
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><h3 style='margin-top:11.4pt;margin-right:0cm;FTEL:11.4pt;margin-left:
0cm'><span lang=EN-US>29.4 </span><span style='font-family:楷体_GB2312'>组件服务管理工具</span></h3>
<p class=MsoNormal><span style='font-family:宋体'>在成功配置后，就可以在树图中看到</span><span
lang=EN-US>Wrox EnterPriseDemo</span><span style='font-family:宋体'>应用程序名。这个名称由属性</span><span
lang=EN-US>[ApplicationMane]</span><span style='font-family:宋体'>设置。选择</span><span
lang=EN-US>Action | Perperties</span><span style='font-family:宋体'>，打开如图</span><span
lang=EN-US>29-3</span><span style='font-family:宋体'>所示的对话框。名称和描述都已使用属性配置了。在选择</span><span
lang=EN-US>Activations</span><span style='font-family:宋体'>标签时，可以看到该应用程序被配置为服务器应用程序，因为它使用</span><span
lang=EN-US>[ApplicationActivation]</span><span style='font-family:宋体'>属性定义，选择</span><span
lang=EN-US>Security</span><span style='font-family:宋体'>标签，其中没有选择</span><span
lang=EN-US>Enforce access checks for this application</span><span
style='font-family:宋体'>选项，因为属性</span><span lang=EN-US>[ApplicationAccessControl]</span><span
style='font-family:宋体'>设置为</span><span lang=EN-US>fasle</span><span
style='font-family:宋体'>。</span></p>
<p align=center><span lang=EN-US><img width=281 height=324
src="29/image003.jpg"></span></p>
<p align=center style='FTEL:8.15pt'><span style='font-family:宋体'>图</span><span
lang=EN-US> 29-3</span></p>
<p class=MsoNormal><span style='font-family:宋体'>这个应用程序还可以设置其他一些选项：</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Security</span><span style='font-family:宋体'>：在安全配置中，可以启用或禁用访问检查。如果启用安全功能，就可以把访问检查设置为应用程序级别、组件级别、接口级别或方法级别。还可以把数据包私密性作为调用的识别级别，加密在网络上的消息。当然，这会降低性能。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Identity</span><span style='font-family:宋体'>：在服务器应用程序中，使用</span><span
lang=EN-US>Identity</span><span style='font-family:宋体'>选项卡可以为驻留应用程序的进程配置要使用的用户账户。在默认情况下这是一个未激活的用户。这个设置在调试应用程序时非常有用，但如果应用程序在服务器上运行，该设置就不能在产品系统上使用，因为没有人能登录。可以为特定的用户改变这个配置。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Activation</span><span style='font-family:宋体'>：</span><span
lang=EN-US>Activation</span><span style='font-family:宋体'>选项卡允许把应用程序配置为库或服务器应用程序。</span><span
lang=EN-US>COM+ 1.5</span><span style='font-family:宋体'>的两个新选项是把应用程序作为</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>服务运行和使用</span><span
lang=EN-US>SOAP</span><span style='font-family:宋体'>访问应用程序。第</span><span
lang=EN-US>33</span><span style='font-family:宋体'>章将讨论</span><span lang=EN-US>Windows</span><span
style='font-family:宋体'>服务。选择</span><span lang=EN-US>SOAP</span><span
style='font-family:宋体'>选项，将在</span><span lang=EN-US>Internet Information Server</span><span
style='font-family:宋体'>中使用</span><span lang=EN-US>.NET Remoting</span><span
style='font-family:宋体'>配置来访问组件。</span><span lang=EN-US>.NET Remoting</span><span
style='font-family:宋体'>已在第</span><span lang=EN-US>16</span><span
style='font-family:宋体'>章讨论过。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Queuing</span><span style='font-family:宋体'>：使用</span><span
lang=EN-US>Message Queuing</span><span style='font-family:宋体'>的服务组件需要</span><span
lang=EN-US>Queuing</span><span style='font-family:宋体'>配置。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Advanced</span><span style='font-family:宋体'>：在</span><span
lang=EN-US>Advanced</span><span style='font-family:宋体'>选项卡中，可以指定应用程序是否应在客户处于未激活状态时的一段时间后停止。还可以指定是否锁定某个配置，这样就不会有人在无意中修改</span><span
lang=EN-US> </span><span style='font-family:宋体'>它了。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Dump</span><span style='font-family:宋体'>：如果应用程序崩溃，就可以指定应把垃圾存储在目录的什么地方。</span><span
lang=EN-US>Dump</span><span style='font-family:宋体'>用于利用</span><span lang=EN-US>C++</span><span
style='font-family:宋体'>开发的组件。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Pooling & Recycling</span><span style='font-family:宋体'>：这是</span><span
lang=EN-US>COM+ 1.5</span><span style='font-family:宋体'>的一个新选项。利用这个选项可以配置应用程序是否根据生存期、需要的内存、调用的次数等重新启动</span><span
lang=EN-US>(</span><span style='font-family:宋体'>循环</span><span lang=EN-US>)</span><span
style='font-family:宋体'>。</span></p>
<p class=MsoNormal><span style='font-family:宋体'>使用组件服务管理工具还可以查看和配置组件本身。在打开应用程序的子元素时，可以查看组件</span><span
lang=EN-US>Wrox.ProCSharp.EnterpriseServices.SimpleComponent</span><span
style='font-family:宋体'>。选择</span><span lang=EN-US>Action | Properties</span><span
style='font-family:宋体'>会打开如图</span><span lang=EN-US>29-4</span><span
style='font-family:宋体'>所示的对话框。</span></p>
<p align=center><span lang=EN-US><img width=278 height=310
src="29/image004.jpg"></span></p>
<p align=center style='FTEL:8.15pt'><span style='font-family:宋体'>图</span><span
lang=EN-US> 29-4</span></p>
<p class=MsoNormal><span style='font-family:宋体'>使用这个对话框，可以配置如下选项：</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Transactions</span><span style='font-family:宋体'>：使用</span><span
lang=EN-US>Transactions</span><span style='font-family:宋体'>选项卡可以指定组件是否需要事务处理。下一个示例将使用这个特性。</span></p>
<p class=1 style='margin-left:37.25pt;FTEL:-15.8pt'><span lang=EN-US
style='letter-spacing:-.1pt'>●<span style='font:7.0pt "Times New Roman"'>
</span></span><span lang=EN-US style='letter-spacing:-.1pt'>Security</span><span
style='font-family:宋体;letter-spacing:-.1pt'>：如果应用程序启用了安全功能，利用这个配置就可以定义允许使用组件的角色。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Activation</span><span style='font-family:宋体'>：</span><span
lang=EN-US>Activation</span><span style='font-family:宋体'>配置允许设置对象池，和指定构造字符串。</span></p>
<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'> </span></span><span
lang=EN-US>Concurrency</span><span style='font-family:宋体'>：如果组件不是线程安全的，</span><span
lang=EN-US>concurrency</span><span style='font-family:宋体'>就可以设置为</span><span
lang=EN-US>Required</span><span style='font-family:宋体'>或</span><span
lang=EN-US>Requires New</span><span style='font-family:宋体'>。这样</span><span
lang=EN-US>COM+</span><span style='font-family:宋体'>运行库就仅允许一个线程访问组件。</span></p>
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