io.webfolder.ui4j.api.util.LoggerFactory Maven / Gradle / Ivy
package io.webfolder.ui4j.api.util;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import static java.lang.Thread.currentThread;
/**
* A factory from which {@link Logger} instances can be obtained.
*
* All of this class's public methods are thread-safe.
*/
public class LoggerFactory {
private static Class SLF4J_LOGGER_CLASS;
static {
try {
SLF4J_LOGGER_CLASS = currentThread().
getContextClassLoader().
loadClass("org.slf4j.LoggerFactory");
} catch (ClassNotFoundException e) {
// ignore
}
}
/**
*
* @param klass the returned logger will be named after klass.
* @return logger
*/
public static synchronized Logger getLogger(Class klass) {
boolean foundSlf4j = SLF4J_LOGGER_CLASS != null;
if (foundSlf4j) {
Method getLoggerMethod = null;
try {
getLoggerMethod = SLF4J_LOGGER_CLASS.getMethod("getLogger", Class.class);
} catch (NoSuchMethodException | SecurityException e) {
throw new Ui4jException(e);
}
Object slf4jLogger = null;
try {
slf4jLogger = getLoggerMethod.invoke(null, klass);
} catch (IllegalAccessException | IllegalArgumentException
| InvocationTargetException e) {
throw new Ui4jException(e);
}
return new Slf4jLogger(slf4jLogger);
} else {
return new JulLogger(klass);
}
}
}