[wildfly-dev] Subsystems changing their own configuration model

[Tristan Tarrant]

We would like to allow a subsystem to modify its configuration model by 
itself at runtime. The use case for this is that we would like to let a 
remote Hot Rod client create a cache on an Infinispan server and making 
that configuration persistent across restarts. I understand this is 
creating management ops which are orthogonal to the server's.

I guess that in standalone mode this wouldn't be too much of an issue, 
with two caveats:
- all nodes in a cluster should apply the changes to their own 
configuration, leveraging the model rollback mechanism to handle 
failures on other nodes
- new nodes joining the cluster (and therefore with a possibly outdated 
configuration) would receive the configuration of caches already running 
in the cluster and applying them locally

The real tricky bit is obviously domain mode. The server receiving the 
cache creation request would need to delegate it to the DC who would 
then apply it across the profile. However this clashes with the fact 
that, as far as I know, there is no way for a server to communicate with 
its DC. Is this type of functionality planned ?

I have created a document which describes what we'd like to do at [1]

Tristan


[1] https://github.com/infinispan/infinispan/wiki/Create-Cache-over-HotRod

-- 
Tristan Tarrant
Infinispan Lead
JBoss, a division of Red Hat