Enabling debug logging
While developing a software application, having a simple way to enable logging for debugging purposes is often required. In this short article, we explain how to set up and activate the built-in SLF4J (Simple Logging Facade for Java) module in the Radix Java client library.
To enable the SLF4J logging module, you need to create a simplelogger.properties file in the root of your project's resources bundle. Typically this would be in the following path:
src/main/resources/simplelogger.properties
In the new simplelogger.properties file you need to add at least one line with the desired log level, e.g.:
# My SLF4J configuration# Must be one of ("trace", "debug", "info", "warn", or "error")org.slf4j.simpleLogger.defaultLogLevel=error
For quick reference, here's a table with additional settings and their possible values:
Property | Values |
org.slf4j.simpleLogger.defaultLogLevel | trace, debug, info, warn, error |
org.slf4j.simpleLogger.showDateTime | true, false |
org.slf4j.simpleLogger.dateTimeFormat | string (Simple Date Format) |
org.slf4j.simpleLogger.showThreadName | true, false |
org.slf4j.simpleLogger.showLogName | true, false |
org.slf4j.simpleLogger.showShortLogName | true, false |
Note: please refer to the SLF4J documentation for further options and detailed information.
For your convinience, we include a sample simplelogger.properties file with extensive debug logging enabled:
simplelogger.properties# SLF4J's SimpleLogger configuration file# Simple implementation of Logger that sends all enabled log messages, for all defined loggers, to System.err.​# Default logging detail level for all instances of SimpleLogger.# Must be one of ("trace", "debug", "info", "warn", or "error").# If not specified, defaults to "info".org.slf4j.simpleLogger.defaultLogLevel=debug​# Set to true if you want the current date and time to be included in output messages.# Default is false, and will output the number of milliseconds elapsed since startup.org.slf4j.simpleLogger.showDateTime=true​# The date and time format to be used in the output messages.# The pattern describing the date and time format is the same that is used in java.text.SimpleDateFormat.# If the format is not specified or is invalid, the default format is used.# The default format is yyyy-MM-dd HH:mm:ss:SSS Z.org.slf4j.simpleLogger.dateTimeFormat=yyyyMMdd HH:mm:ss.SSS Z​# Set to true if you want to output the current thread name.# Defaults to true.org.slf4j.simpleLogger.showThreadName=true​# Set to true if you want the Logger instance name to be included in output messages.# Defaults to true.org.slf4j.simpleLogger.showLogName=true​# Set to true if you want the last component of the name to be included in output messages.# Defaults to false.org.slf4j.simpleLogger.showShortLogName=true
