Feature: Add interface to produce metrics

[bersler]

Is your feature request related to a problem? Please describe.
Add ability to probe OpenLogReplicator process to provide statistics about processed work.

Describe the solution you'd like
Introduce a service which would provide monitoring statistics like number of processed transactions, used memory, biggest transaction, etc.

Describe alternatives you've considered
Track messages from the error log. But the provided information is not sufficient.

Additional context
Monitoring would allow to provide faster way of detecting potential errors and troubleshooting.

[bersler]

This feature is complicated to implement.. If there is a demand from users more focus could be given here.

[sonnguyen-dba]

Hi Adam,
I hope this so long time. :)

Regards,
Son

[bersler]

fixed by last commit in master branch