This is the manual for older MicroStream versions (Version < 5.0).
The new documentation (Version >= 5.0) is located at:
Another predefined logic layer is for logging purposes. Since there is a myriad of loggers out there, MicroStream doesn't provide any special adapter, but a generic type which can be used to adapt to the logging framework of your choice.
Just create a class and implement EntityLogger, and you are good to go.
public class JulLogger implements EntityLogger
public void afterUpdate(
final Entity identity,
final Entity data,
final boolean successful)
.info("Entity updated");
Additional to afterUpdate there are further hooks:
  • entityCreated
  • afterRead
  • beforeUpdate
Now just add the logger when creating entities:
JulLogger logger = new JulLogger();
Person john = PersonCreator.New()
When you call
PersonUpdater.setLastName(john, "Smith");
the logger's output is
Oct 15, 2019 11:17:53 AM JulLogger afterUpdate
INFO: Entity updated