Logging in HERE Anonymizer Self-Hosted

SLF4J

HERE Anonymizer Self-Hosted uses SLF4J for logging.

This is a standard way to implement logging in Java.

The SLF4J (Simple Logging Facade for Java) implements a simple abstraction for different logging frameworks. It allows you to plug in your logging framework of choice at deployment time.

Log4J

Log4J is a logging API for Java.

It implements the actual logging to the configured sink and interfaces with different logging facades, for example SLF4J.

By default, Apache Flink uses Log4J, and so does HERE Anonymizer Self-Hosted which is an Apache Flink application. You can configure Log4J by passing the relevant configuration properties to the HERE Anonymizer Self-Hosted application.

This is an example of a log4j-console.properties file. Note that all parts are optional. If you don't provide any logging configuration, no logs are created.

# This affects logging for both, Anonymization application and Flink
rootLogger.level = INFO
rootLogger.appenderRef.console.ref = ConsoleAppender
rootLogger.appenderRef.rolling.ref = RollingFileAppender

# Uncomment this if you want to change only Flink logging
# logger.flink.name = org.apache.flink
# logger.flink.level = INFO

# Uncomment this if you want to change only Anonymizer logging
# logger.anonymization.name = com.here.anonymization
# logger.anonymization.level = INFO

# Log all info to the console
appender.console.name = ConsoleAppender
appender.console.type = CONSOLE
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n

# Log all info in the given rolling file
appender.rolling.name = RollingFileAppender
appender.rolling.type = RollingFile
appender.rolling.append = false
appender.rolling.fileName = ${sys:log.file}
appender.rolling.filePattern = ${sys:log.file}.%i
appender.rolling.layout.type = PatternLayout
appender.rolling.layout.pattern = %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %-60c %x - %m%n
appender.rolling.policies.type = Policies
appender.rolling.policies.size.type = SizeBasedTriggeringPolicy
appender.rolling.policies.size.size=100MB
appender.rolling.strategy.type = DefaultRolloverStrategy
appender.rolling.strategy.max = 10

# Suppress the irrelevant (wrong) warnings from the Netty channel handler
logger.netty.name = org.jboss.netty.channel.DefaultChannelPipeline
logger.netty.level = OFF