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diff --git a/CIAO/docs/RT-Extension.html b/CIAO/docs/RT-Extension.html deleted file mode 100644 index 3414a30b78e..00000000000 --- a/CIAO/docs/RT-Extension.html +++ /dev/null @@ -1,132 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> -<!-- $Id$ --> -<html> <head> -<title>Using the Real-time Extension in CIAO</title> -</head> - -<body> -<h1>Using the Real-time Extension in CIAO</h1> - -<!-- ============================================================ --> -<h3>Abstract</H3> - -The real-time extension support in CIAO enables application developers -to deploy real-time applications by specifying real-time -configurations as XML descriptors without modifying the component -implementation. In fact, embedding the real-time configuration -policies in component implementations decrease the reusability of the -software components. - -Different types of real-time policy can be applied at different -stage of the component development lifecycle, e.g., -<ul> - <li>Component implementation - <li>Component packaging - <li>Application composition - <li>Target platform configuration - <li>Deployment configuration -</ul> - -Real-time policies can also be applied to various scope in an -applications, e.g., many real-time policies can be associate with some -or all of the following ORB mechanisms: -<ul> - <li>ORBs - <li>POAs - <li>Threads - <li>Object references -</ul> - -<!-- ============================================================ --> -<h3>CIAO's Real-time Extension</h3> - -CIAO extends CCM's assembly descriptor to support the specifications -of real-time policies. This mechanism allows you to allocate -resources that are global to a RTComponentServer and to define real-time -policies required by a component installation. Currently, CIAO -support configuration of certain real-time policies at the POA level, -i.e., in CCM's terminology, the container level. These policies -include: - -<ol> - <li>Priority Model Policy - <li>Threadpool Policy - <li>Banded Connection Policy -</ol> - -The kind of resources that are global to a RT component server that CIAO -real-time extension specifies include: - -<ol> - <li>Threadpool - <li>Threadpool with lanes - <li>Connection bands -</ol> - -<!-- ============================================================ --> -<h3>Using the CIAO Real-time Extension</h3> - -Application developers can define the aforementioned Real-Time -extension Descriptor (.rtd file) that CIAO defines to allocate -resources and specify real-time policies. The Document Type -Definition (DTD) for the real-time extension description is defined in -this <a href="XML/ciao_rt_cad_ext.dtd">file</a>. Each .RTD file -specifies the required resources and the policy definitions within a -RTComponentServer. - -A RTComponentServer can be associated to a .RTD file. This is done by -using the "extension" element with "class" attributed set to -"RT-CAD-EXT", within a processcollocation or hostcollocation element. -Here is an example: -<code><pre> - - <processcollocation> - . - . - . - <extension class="RT-CAD-EXT" origin="CIAO">somefile.rtd</extension> - . - </processcollocation> -</pre></code> - -Each .RTD file contains the two major subelements: -<ul> - <li><rtresources>: defines all the RT resources the assciating - RTComponentServer should provide. - <li><rtpolicysets>: defines named collections of policies - (<rtpolicyset>) that apply to component installations in - the RTComponentServer. -</ul> - -The <rtpolicyset>'s defined in the .RTD file can be associated -to a component installation, i.e., a component placement within the -RTComponentServer to which the .RTD file is associated. For example, - -<code><pre> - <homeplacement> - . - . - , - <extension class="RT-POLICY-SET" - origin="CIAO">A_POLICY_NAME</extension> - . - </homeplacement> -</pre></code> - -<h3>Future Addition</h3> - -As mentioned earlier, RT policies can be applied at various stages of -component-based deployment lifecycle and at different scope. For -example, applying RTpolicies at the ORB level, or at the object -reference level of a component receptacle. These extensions involve -at least, extending the "appropriate" XML descriptor definition and -extending the CIAO runtime, including core and/or the CIDL generated -code to configure the policies. How other RT-related policies can be -added will be reviewed in my thesis available shortly. - -<hr> -<address>Nanbor Wang</address> -<!-- hhmts start --> -Last modified: Sun Nov 30 19:23:25 Mountain Standard Time 2003 -<!-- hhmts end --> -</body> </html> |