Having made that change, the agent logs this error:
2010-11-18 16:22:23,961 ERROR [InventoryManager.discovery-1]
(rhq.core.pc.inventory.RuntimeDiscoveryExecutor)- Unable to obtain
discovery component for [ResourceType[id=0, category=Server, name=Initiate
JMX server, plugin=Initiate Hub]]
org.rhq.core.clientapi.agent.PluginContainerException: Plugin class was
'null' using loader
[PluginClassLoader@4b794b79[parent=PluginClassLoader(a)5d2b5d2b[parent=org.r
hq.core.pc.plugin.RootPluginClassLoader@74157415,embedded-dir=[file:/opt/rh
q/rhq-agent/data/tmp/rhq-jmx-plugin-3.0.0.jar28960.classloader/],urls=[file
:/opt/rhq/rhq-agent/plugins/rhq-jmx-plugin-3.0.0.jar,org-mc4j-ems-1.2.11.ja
r28961.tmp]],embedded-dir=[<>],urls=[file:/opt/rhq/rhq-agent/plugins/initia
te-empi.jar]]]
I expected that the "depends " attribute caused this plugin to inherit the
discovery of the JMX plugin.
The <depends> tag says that your plugin depends on the resource types (and
uses classes) of the JMX plugin. But the JMX plugin defines a number of
resource types and discovery and component classes so you still have to
specify the class name of both the discovery (discovery attribute) and
component classes (class attribute) for each resource type you define in your
plugin descriptor.
You can specify ones from the JMX plugin (because you have "useClasses=true"
in the depends tag) or you can specify your own if you have custom discovery
and component classes in your plugin.
The discovery and class attributes aren't required on the <platform>,
<server>
or <service> elements because the resource type can be specified as a copy of
another. Please consult
Here is the descriptor now:
Al Amyot | Consultant
Sierra Systems
(eHealth): 204-926-4257 (T): 204-942-2575 (F): 204-942-2047
444 St. Mary Avenue, Suite 1050
Winnipeg, MB R3C 3T1
Management Consulting | System Integration | Managed Services
website:
www.SierraSystems.com
-----Original Message-----
From: rhq-users-bounces(a)lists.fedorahosted.org
[mailto:rhq-users-bounces@lists.fedorahosted.org] On Behalf Of John
Mazzitelli Sent: Thursday, November 18, 2010 4:07 PM
To: rhq-users(a)lists.fedorahosted.org
Subject: Re: Custom JMX plugin problems
Yeah, but in the custom jmx demo case, that <service> is the top level
resource.
In your case, your top level resource (<server name="Initiate JMX
server">) doesn't have the <runs-inside> in it. But your child service
does
- which doesn't make sense because the child <service> by definition runs
inside the parent <server> where its declared. We should probably spit out
a warning of some sort if we detect this - I don't think it makes sense to
put a <runs-inside> inside of anything other than a top-level resource.
In fact, our documents allude to this - read here:
http://rhq-project.org/display/RHQ/AMPS-Plugin+Extensions#AMPS-PluginExtens
ions-Caveats
where it says
"Injection: A root level <server> or <service> can have a
<runs-inside>
element. "
Also notice the "For the future" yellow box where it asks if we would want
to allow for a non-root-level type to accept runs-inside.
So while not explicitly saying so, they infer that you can't have
runs-inside in anything other than a root-level (aka top-level) type.
On 11/18/2010 04:57 PM, Al Amyot wrote:
> Here's the same section from the Plugin Demo - Writing Custom JMX
>
> Plugin:
> <service name="First Custom Service"
>
> description="Our first MBean custom service whose 'id' is
>
> static"
>
> discovery="org.rhq.plugins.jmx.MBeanResourceDiscoveryComponent"
>
> class="org.rhq.plugins.jmx.MBeanResourceComponent">
>
> <runs-inside>
>
> <parent-resource-type name="JMX Server"
plugin="JMX"/>
> <parent-resource-type name="JBossAS Server"
plugin="JBossAS"/>
>
> </runs-inside>
>
> I just followed the above example.
>
> I did find one error but fixing it had no effect:
>
> <c:simple-property name="descriptionTemplate" default="Initiate
Hub
> {engine} on port {port} Interaction [interaction}"/> should be:
> <c:simple-property name="descriptionTemplate" default="Initiate
Hub
> {engine} on port {port} Interaction {interaction}"/> Notice the
> erroneous "["
>
>
> Al Amyot | Consultant
> Sierra Systems
>
> (eHealth): 204-926-4257 (T): 204-942-2575 (F): 204-942-2047
> 444 St. Mary Avenue, Suite 1050
> Winnipeg, MB R3C 3T1
>
>
>
> Management Consulting | System Integration | Managed Services
> website:
www.SierraSystems.com
>
>
> -----Original Message-----
> From: rhq-users-bounces(a)lists.fedorahosted.org
> [mailto:rhq-users-bounces@lists.fedorahosted.org] On Behalf Of John
> Mazzitelli
> Sent: Thursday, November 18, 2010 3:51 PM
> To: rhq-users(a)lists.fedorahosted.org
> Subject: Re: Custom JMX plugin problems
>
> The runs inside:
>> <runs-inside>
>> <parent-resource-type name="JMX Server"
plugin="JMX"/>
>> </runs-inside>
>
> looks to be out of place no? Shouldn't that be inside the<server>
> element, not inside the child<service> element?
>
> Unsure if that's the cause of your problem, but that's the thing that
> jumped out at me when I looked.
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>
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Ce courriel et tout document dans cette transmission est destiné à la
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