RE: [FR-devel] Problem with RUNNING state

[Rich Kilmer]

> -----Original Message-----
> From: address@hidden [mailto:freeride-
> address@hidden On Behalf Of Laurent Julliard
> Sent: Wednesday, June 26, 2002 11:13 AM
> To: address@hidden
> Subject: Re: [FR-devel] Problem with RUNNING state
> 
> Rich Kilmer wrote:
> > Response is at the bottom of this message.
> 
> >>
> >>[RICH -- we can make a plugin be dependent on a subsystems, right?]
> >
> >
> > Right now a subsystem is just a collection that has no manifestation
in
> > the plugin architecture.  It literally is just a holder of many
plugins
> > that each get loaded and was put in place to simplify grouping
plugin
> > xml data.  Because of this you cannot be dependent on it.
> >
> > Thus (Curt) when you specify:
> >
> > <subsystem name="GuiRenderFox">
> >
> > the name is ignored.
> >
> > So here is the idea.  Register the subsystem as a plugin using the
> > StandardPlugin module as its mixin (and REQUIRE a name be supplied).
> 
> Rich,
> 
> I'm a bit lost (or tired or both :-) ). Could you be more precise on
how
> to register the susbsystem as a plugin? What do you mean exactly by
"and
> REQUIRE a name be supplied".
> 
> Would you be willing to provide some sample code here? That would
help...
>

__example xml__

<subsystem name="GuiCore">

  <plugin name="GuiSetup" version="1.0" autoload="true">
    <require>plugins/System_GuiCore/GuiSetup</require>
    <module>FreeRIDE::GuiSetup</module>
    <properties>properties/GuiCore/GuiSetup.xml</properties>
    <dependency state="LOADED" action="start">
      <when plugin="Logger" version="*" state="RUNNING"/>
      <when plugin="AppFrames" version="*" state="RUNNING"/>
      <when plugin="MenuBars" version="*" state="RUNNING"/>
      <when plugin="MenuPanes" version="*" state="RUNNING"/>
      <when plugin="EditPanes" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

  <plugin name="AppFrames" version="1.0" autoload="true">
    <require>plugins/System_GuiCore/AppFrames</require>
    <module>FreeRIDE::AppFrame</module>
    <properties>properties/GuiCore/AppFrames.xml</properties>
    <dependency state="LOADED" action="start">
      <when plugin="Logger" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

  <plugin name="MenuBars" version="1.0" autoload="true">
    <require>plugins/System_GuiCore/MenuBars</require>
    <module>FreeRIDE::MenuBar</module>
    <properties>properties/GuiCore/MenuBars.xml</properties>
    <dependency state="LOADED" action="start">
      <when plugin="Logger" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

  <plugin name="MenuPanes" version="1.0" autoload="true">
    <require>plugins/System_GuiCore/MenuPanes</require>
    <module>FreeRIDE::MenuPane</module>
    <properties>properties/GuiCore/MenuPanes.xml</properties>
    <dependency state="LOADED" action="start">
      <when plugin="System_Commands" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

  <plugin name="EditPanes" version="1.0" autoload="true">
    <require>plugins/System_GuiCore/EditPanes</require>
    <module>FreeRIDE::EditPane</module>
    <properties>properties/GuiCore/EditPanes.xml</properties>
    <dependency state="LOADED" action="start">
      <when plugin="Logger" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

</subsystem>
__END EXAMPLE__

In this example, the subsystem tag <subsystem name="GuiCore"> is just a
holder of multiple <plugin> tags.  When core.rb parses this file it
merely iterates over the contained <plugin> tags and creates them.  The
subsystem is not represented in the running FreeBASE system and the name
is ignored.  What I propose is that when the core.rb file reads in an
xml file that contains a <subsystem name="..."> tag it creates a plugin
(just like the <plugin> tag does) that is named as specified (GuiCore)
and has a dependency of all the plugins within it.  It would be like
doing this:

  <plugin name="GuiCore" version="1.0" autoload="true">
    <module>FreeBASE::SubsystemPlugin</module>
    <dependency state="LOADED" action="start">
      <when plugin="GuiSetup" version="*" state="RUNNING"/>
      <when plugin="AppFrames" version="*" state="RUNNING"/>
      <when plugin="MenuBars" version="*" state="RUNNING"/>
      <when plugin="MenuPanes" version="*" state="RUNNING"/>
      <when plugin="EditPanes" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

This would allow something that depends on this entire subsystem to be
dependant on it instead of its components.

  <plugin name="FooPlugin" version="1.0" autoload="true">
    <require>...</require>
    <module>...</module>
    <dependency state="LOADED" action="start">
      <when plugin="GuiCore" version="*" state="RUNNING"/>
    </dependency>
  </plugin>

Does this make sense?

-Rich