[jboss-jira] [JBoss JIRA] (AS7-5905) Use ServiceLoader to locate mod_cluster custom load metrics

[Radoslav Husar (JIRA)]

    [ https://issues.jboss.org/browse/AS7-5905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739036#comment-12739036 ] 

Radoslav Husar commented on AS7-5905:
-------------------------------------

@[~brian.stansberry]

{quote}
It may help, but for custom metrics, unless the user edits module.xml (bad!!!!) to add a dependency there needs to a mechanism to identify the module of the metric. Otherwise there is no way to access the module. What's there now seems to be wrong in this respect.
{quote}

I totally agree it's bad. AFAIK there isn't another reasonable mechanism to do it, is there? Just dropping a JAR somewhere would be much more usable.

{quote}
If more than one metric is available via ServiceLoader, how will the desired one be identified?
{quote}

The idea here is that ServiceLoader will load all factory classes for a load metrics. Each factory is identifiable by String name ( say something like String getId(); ). Factory knows how to constract that particular LoadMetric class and users don't have to specify FQCN in the AS configuration. WDYT?
                
> Use ServiceLoader to locate mod_cluster custom load metrics
> -----------------------------------------------------------
>
>                 Key: AS7-5905
>                 URL: https://issues.jboss.org/browse/AS7-5905
>             Project: Application Server 7
>          Issue Type: Feature Request
>          Components: Clustering
>            Reporter: Radoslav Husar
>            Assignee: Radoslav Husar
>             Fix For: 7.2.0.Alpha1
>
>
> Solves the problem of having to identify load metrics by class names.

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