[Jtrix-discussion] Jnode Plugins

[Andrew C. <an...@te...>]

Hi All, 

I would welcome any comments for the following. 

I have added support for plugins to Jnode and moved most of the
additions like clustering and resources as plugins. So if you wanted to
start a node with a Disk Resource then you start Jnode with the
DiskResource plugin. 

The Plugins are similar to beatrix plugins but if the plugin, using
introspection, has a method getParameterBean() : Object 
then the object returned will be used in the plugin init function.
This bean then gets set with parameters given at the command line and so
the above example becomes: 
jnode -plugin org.jtrix.project.jnode.plugins.resource.DiskResource id=0
path=/tmp writable=true ... 

There are some hook plugins like facet support, service support,
resource support. 

An Addition that I have started is the idea of a Jnode Wizard. This
allows the user to create a boot object by selecting plugins and setting
the parameters for them. Once this has been saved then using a command
like Jnode -boot mynode.jwb (Jnode Wizard Bootfile) will start the node
with all the plugins selected. 

The reason for this change would be to allow the hosting service,
hospitality, to be run as a plugin to Jnode.

I have attached a Class Diagram of the above architecture. 

Another point I was wondering, Has the JavaGroups code changed compared
to the main branch on the JavaGroups project? If not can the source for
this not become an external jar in the jnode project instead of the
source itself. 

Andy C