Logging

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
{
@Override
public void afterUpdate(
final Entity identity,
final Entity data,
final boolean successful)
{
Logger.getLogger(identity.getClass().getName())
.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();
‚Äč
Person john = PersonCreator.New()
.addLayer(logger)
.firstName("John")
.lastName("Doe")
.create();

When you call

PersonUpdater.setLastName(john, "Smith");

the logger's output is

Oct 15, 2019 11:17:53 AM JulLogger afterUpdate
INFO: Entity updated