There should be a way to create a synchronous guage.

[ewoolsey]

Basically, there should be a way to create a gauge that doesn't require a callback to be set. Perhaps there is some magic that one can do currently which allows this with ObservableGauge but I have not seen how. There are two main reasons I can think of for this feature.

1. compatibility with the metrics facade. Their implementation uses synchronous gauges so theoretically it would be possible to make a metrics-exporter-opentelemety. This is my current use case, and as far as I can tell this is unsolvable without this feature.
2. You have have a value that you keep track of that only changes during events, think the balance in a wallet. The observable gauge isn't great here since it doesn't update during the event. A counter would also be problematic in this situation for obvious reasons.

[lalitb]

@ewoolsey there is experimental support for Synchronous gauge added as part of #1410, just in case you are looking for this.

[ewoolsey]

@lalitb I swear I did a search for this and somehow didn't find anything. Thanks so much for the link that is exactly what I need to make this work! I'll close with this comment!