Something to consider (& possibly chime in) for support of future WildFly versions in
the as7 plugin
Anfang der weitergeleiteten Nachricht:
Von: Jeff Mesnil <jmesnil(a)redhat.com>
Datum: 30 Oct 2014 11:40:07 CET
An: Heiko Braun <hbraun(a)redhat.com>
Kopie: WildFly Dev <wildfly-dev(a)lists.jboss.org>
Betreff: Aw: [wildfly-dev] Management Model: Squatter Resources
I’m integrating HornetQ 2.5 in WildFly and I have a new use case for resources that is
related to singleton/squatter resources.
In HornetQ 2.5 they have completely rewritten the HA configuration. Basically, a server
can be configured as live-only, replicated (master, slave, or colocated) or using
shared-store (again as a master, slave or colocated).
To represent this in the management model, I have added several resources under
hornetq-server:
/subsystem=messaging/
hornetq-server=*/
ha-policy=live-only
ha-policy=replicated-master
ha-policy=replicated-slave
ha-policy=replicated-colocated
ha-policy=shared-store-master
ha-policy=shared-store-slave
ha-policy=shared-store-colocated
I have constraints for this ha-policy resource:
* There can at most one child for this type of resource (no child means no HA). This is
enforces during the MODEL stage.
* The child can only be named using one of the 7 values above (i.e. there is no resource
definition for ha-policy=*, using any other name would fail)
Each ha-policy definition has a different set of attributes. Using an attribute group to
represent the HA policy does not seem a good fit as some of them have subresources too.
I wonder if that representation fits with our roadmap and whether it can be considered as
a singleton (as there can only be one resource of that type among). I have the additional
constraints of having only one chile for that type that is not covered by your proposal
though.
I especially wonder how the console (and to a lesser extent the cli) can deal with this
resource.
Heiko, is it something that would make sense for the console based on this resource
description:
[standalone@localhost:9990 hornetq-server=default]
./ha-policy=*:read-resource-description(recursive-depth=1)
{
"outcome" => "success",
"result" => [
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "replication-colocated")
],
"outcome" => "success",
"result" => {
...
}
},
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "replication-master")
],
"outcome" => "success",
"result" => {
...
}
},
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "shared-store-slave")
],
"outcome" => "success",
"result" => {
...
}
},
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "live-only")
],
"outcome" => "success",
"result" => {
...
}
},
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "shared-store-master")
],
"outcome" => "success",
"result" => {
...
}
},
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "replication-slave")
],
"outcome" => "success",
"result" => {
...
}
},
{
"address" => [
("subsystem" => "messaging"),
("hornetq-server" => "default"),
("ha-policy" => "shared-store-colocated")
],
"outcome" => "success",
"result" => {
...
}
}
]
}
jeff
--
Jeff Mesnil
JBoss, a division of Red Hat
http://jmesnil.net/
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