com.aragost.javahg.log.LoggerFactory Maven / Gradle / Ivy
package com.aragost.javahg.log;
import com.aragost.javahg.internals.ServiceLoader;
import com.google.common.base.Strings;
/**
* Factory class to retrieve a {@link Logger} instance. The LoggerFactory
* searches a implementation with the use of {@link ServiceLoader}, if no
* implementation could be found it uses the default implementation
* {@link JULLoggerFactory}.
*/
public abstract class LoggerFactory {
private static LoggerFactory instance;
static {
String loggerFactoryName = System.getProperty( LoggerFactory.class.getName() );
try
{
if ( ! Strings.isNullOrEmpty(loggerFactoryName) ){
instance = (LoggerFactory) Class.forName(loggerFactoryName).newInstance();
} else {
instance = ServiceLoader.loadService(LoggerFactory.class);
}
}
catch (Exception ex)
{
// do nothing
}
if ( instance == null ){
instance = new JULLoggerFactory();
}
}
/**
* Return a logger for the class
*
* @param cls
* @return
*/
public static Logger getLogger(Class cls) {
return instance.getLoggerInstance(cls);
}
protected abstract Logger getLoggerInstance(Class cls);
}