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https://issues.apache.org/jira/browse/OFBIZ-5198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13662805#comment-13662805
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Jacques Le Roux commented on OFBIZ-5198:
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Thanks, I will try that.
Note: I did not store properties settings in *static* final fields.
> Add a mean to collect and show the Requests Events durations using Metrics
> --------------------------------------------------------------------------
>
> Key: OFBIZ-5198
> URL: https://issues.apache.org/jira/browse/OFBIZ-5198
> Project: OFBiz
> Issue Type: New Feature
> Components: framework
> Affects Versions: SVN trunk
> Reporter: Jacques Le Roux
> Priority: Minor
> Fix For: SVN trunk
>
> Attachments: OFBIZ-5198 metrics.patch
>
>
> *Requirements:*
> collect the durations of events (and only events) of a requests. This is
> currently missing for chained requests which are not using a service, either
> in Stats or Metrics. I have not looked into details of the Stats
> implementations but I did in Metrics.
> *What I found:*
> I want to use Metrics because I find its implementation easier to understand
> and modify than Stats. Also its UI is more legible. And I don't mind saving
> in DB, which anyway could always be added as an option from a properties.
> *What I did:*
> I figured out that to get this new measure, I need another column in Metrics
> UI and a related new variable in code. The existing serviceRate varialbe is
> fetched by getAllMetrics service and calculated by recordServiceRate()
> Metrics method. I added the possibility to change the 3 driving parameters
> (estimation size and time and the smoothing factor) with properties.
> *What want and did not want*
> I want to benefit from the existing Metrics framework, making the less
> changes as possible. I did not want to add a new controller element, nor even
> add an attribute to Metric element. Even if in some cases the new column will
> not be populated (services) or will have less interest (not chained
> requests). Luckily, the cost of calculating this new variable is very slow.
> I did not want to interfer with the existing code. Because it's only a
> measure which don't need the threshold feature. The easier way I found was to
> slightly modify the recordServiceRate() method. I introduced a
> requestEventRate variable which is only calculated for request (be chained or
> not). Actually what I call event is more the duration from the beginning of
> RequestHandler until the end of the called event. This is what matters when
> you want to measure the cost of interleaved/chained requests of a global
> request.
> *To test:*
> simply add a metric element to any request-map in a controller
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