This is an example of how to check if a message is loggable. We are going to use a Logger with logging.Level set to WARNING and then log messages in different levels, in order to check if they are loggable. To do so, we have to:
- Create an instance of Logger, with the
getLogger(String name)API method, using as parameter the name of Class that uses the Logger. - Set the logging level to
Level.WARNING, with thesetLevel(Level newLevel)API method of the Logger. In this case logging at WARNING and all higher levels is enabled. - Use the
isLoggable(Level level)API method of the Logger for different levels, such asINFO,WARNING,SEVERE, and use the corresponding methods of the logger,info(String msg),warning(String msg),severe(String msg)to log a message in different levels. Since the level is set to WARNING in this example, only the messages that are logged to WARNING and above will be logged.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.logging.Logger;
import java.util.logging.Level;
public class LoggingLevelCheckExample {
public static void main(String[] args) {
// Create an instance of Logger and set the logging level to Level.WARNING.
Logger log = Logger.getLogger(LoggingLevelCheckExample.class.getName());
log.setLevel(Level.WARNING);
// Log INFO level message
if (log.isLoggable(Level.INFO)) {
log.info("Application Info Message");
}
// Log WARNING level message when Level.WARNING is loggable.
if (log.isLoggable(Level.WARNING)) {
log.warning("Application Warning Information");
}
// Log SEVERE level message when Level.SEVERE is loggable.
if (log.isLoggable(Level.SEVERE)) {
log.severe("Info Severe Information");
}
}
}
Output:
Αυγ 12, 2012 2:01:54 ΜΜ com.javacodegeeks.snippets.core.LoggingLevelCheckExample main
WARNING: Application Warning Information
Αυγ 12, 2012 2:01:54 ΜΜ com.javacodegeeks.snippets.core.LoggingLevelCheckExample main
SEVERE: Info Severe Information
This was an example of how to check if a message is loggable in Java.
