[jboss-jira] [JBoss JIRA] (AS7-4091) Optimize organization and management of the JGroups subsystem

Optimize organization and management of the JGroups subsystem ------------------------------------------------------------- Key: AS7-4091 URL: https://issues.jboss.org/browse/AS7-4091 Project: Application Server 7 Issue Type: Task Components: Clustering, Domain Management Affects Versions: 7.1.0.Final Reporter: Richard Achmatowicz Assignee: Richard Achmatowicz Fix For: 7.2.0.Alpha1 There are a number of areas where the JGroups subsystem is organizationally deficient: - does not make use of ResourceDefinitions to (i) simplify the generation of DescriptionProviders and (ii) localize the definition of AttributeDefinitions - handlers are in some cases written from scratch rather than subclassing helper handlers such as AbstractWriteAttributeHandler, AbstractAddStepHandler, AbstractRemoveStepHandler, etc. - collections of services are defined monolithically, rather than in distinct units which makes stopping/restarting them error prone (c.f. CacheContainerAdd, CacheAdd install three or four services each with complex processing - stopping and restarting this in another handler is next to impossible) - ServiceNames are not always easy to reconstruct These issues make maintenance of the subsystem hard. These matters can be helped by: - making use of ResourceDefinitions - defining for each service X a static method installX(context, operation, model) and removeX(context, operation, model) which can be made use of in installServices(context, operation, model) and removeServices(operation, context, model) - define the static method populate(), used to populate a model from an operation, which can be reused in populateModel(), creating describe operations, as well as other contexts - define a static method installServices(context, operation, model) which can be used in performRuntime(), and in contexts where all services for a resource need to be stopped and restarted; similarly define removeServices(context, operation, model) - make sure each ServiceName can be regenerated easily (c.f. regenerating JNDI names can involve model processing)