[Hawkular-dev] HWKMETRICS-83 Create glue code component to integrate with hawkular-bus

Hi everyone, I sent a pull request to the Metrics repo to implement $subject. https://github.com/hawkular/hawkular-metrics/pull/393 I won't paste here the whole PR description, but the following might be of interest. There is a new "hawkular-metrics-component" WAR module. It is meant to replace "hawkular-metrics-api-jaxrs" module in Hawkular deployments. This new WAR is a "super"-module: it uses Maven WAR plugin overlay mechanism to add extra classes to the standalone metrics web application. The extra classes allow to subscribe to the MetricsService#insertedDataEvents observable and publish messages on the bus. In order to make the migration easy, I have shamelessly copied Alerts' AvailDataMessage and MetricDataMessage classes. Theses messages are posted on to the "HawkularAvailData" and "HawkularMetricData" topics, respectively. After this PR is merged we only need to change the agent code to remove the "double-push" part. And change Hawkular POM to switch to the new Metrics component. That's it. I would like to discuss the JSON payload format later. It might need to be changed, but let's flip this coin first. Thanks, Thomas