Expose ES Ping Functionality through EventStoreClient

[NielsPilgaard]

Is your feature request related to a problem? Please describe. I have a hard time validating that my ES connection is healthy without performing an operation that would create a stream. The only reliable method I've found is to briefly subscribe to the All stream: https://github.com/Xabaril/AspNetCore.Diagnostics.HealthChecks/blob/master/src/HealthChecks.EventStore.gRPC/EventStoreHealthCheck.cs#L25

Describe the solution you'd like I would like the ability to ping EventStore through the EventStoreClient, to validate a healthy connection based on the response, or lack of response.

Describe alternatives you've considered I've considered the following:

• Creating a random stream and then tombstoning it, but this leaves behind a trail.
• Subscribing briefly to the all stream (which is what I'm doing at the moment)

Additional context If implemented, I plan to use the Ping functionality in the ES gRPC HealthCheck nuget: https://www.nuget.org/packages/AspNetCore.HealthChecks.EventStore.gRPC

[alexeyzimarev]

You don't necessarily need to subscribe to $all, you can read, for example, the last event from $all

[NielsPilgaard]

Ah right - Is there always at least 1 event in $all?

[alexeyzimarev]

There should be something there as when the server starts it writes something to it. In any case, $all exists unconditionally, so even if you get an empty response (which I doubt), you understand that the call went through. You will never get Stream not found when reading from $all for sure :)

[NielsPilgaard]

That should work nicely then, thank you!