Logging is a very common feature for all applications. ES4X does not implement a logger, instead it just uses the logger
from the JDK, also known as java util logging or JUL. Even the
console object is linked to it, so you can disable
console from logging at a specific level at runtime just by using configuration.
In order to customize the logging, create a file
logging.properties with the configuration as you like. The default
handlers=java.util.logging.ConsoleHandler java.util.logging.ConsoleHandler.formatter=io.reactiverse.es4x.jul.ES4XFormatter java.util.logging.ConsoleHandler.level=FINEST .level=INFO io.reactiverse.level=INFO io.vertx.level=INFO com.hazelcast.level=INFO io.netty.util.internal.PlatformDependent.level=SEVERE
You can see that there is a custom formatter, this is to offer you a
ANSI color logger. If the formatter is disabled all
logs will be in plain text without
To only log warning and errors at runtime, including from the
console object, just level up the level on the console
You can even ship the logs to other locations by adding more handlers.