pnowojski commented on issue #10247: [FLINK-14813][runtime]Expose the new 
mechanism implemented in FLINK-1…
URL: https://github.com/apache/flink/pull/10247#issuecomment-559746061
 
 
   I'm only not sure how to register a new Task `Gauge` `isBackPressured` in 
the `TaskIOMetricGroup`. I think this needs some refactoring in the future, but 
for now could you register the metric in the following way inside the `Task` 
constructor:
   ```
                this.metrics = metricGroup;
                metricGroup.gauge("isBackPressured", new 
BackPressureGauge(this));
   ```
   
   Follow up work would be to introduce `TaskIOMetricGroupBuilder`, created in 
the `TaskExecutor`, which is passed to the `Task`. `Task` would  add, the 
backpressure gauge to the builder and final `TaskIOMetricGroup` would be 
constructed/built in the `TaskExecutor` after constructing the `Task`.

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