[FLINK-12103] Extend builtin operator metrics with user defined scope and variables

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Abandoned
• Affects Version/s: 1.7.2
• Component/s: Runtime / Metrics
• Assignee: Unassigned
• Reporter: Ben Marini
• Created: 03/Apr/19 16:55
• Updated: 13/Apr/21 20:30
• Resolved: 24/May/19 10:12

Description

I'm looking for a way to extend the builtin throughput and latency metrics for operators with my own metric variables.

My specific use case:

I have a job that defines a list of independent source -> sink streams. I would like to add my own metric variables to each of these independent streams. For example, something like this:

class MyFilter extends RichFilterFunction {
  override def open(parameters: Configuration): Unit = {
    val mg = getRuntimeContext.getMetricGroup // Includes "streamName" -> "A|B"

    // Init some user defined metrics here...
  }
}

// Stream A
// Native operator metrics and user defined metrics in rich operators include "streamName" -> "A"
streamA = env.withMetricGroup((mg) => mg.addGroup("streamName", "A").addSource(...).filter(new MyFilter).addSink(...)

// Stream B
// Native operator metrics and user defined metrics in rich operators include "streamName" -> "B"

streamB = env.withMetricGroup((mg) => mg.addGroup("streamName", "B").addSource(...).filter(new MyFilter).addSink(...)

 
Is this possible? Would a new hook into StreamTransformation have to be added?