cl.logging.JavaLog Maven / Gradle / Ivy
package cl.logging;
import java.io.IOException;
import java.io.InputStream;
import java.util.function.Supplier;
import java.util.logging.LogManager;
import java.util.logging.Logger;
/**
* This class is a Java logging's implementation of the {@link Log} interface.
*
*
* The class will attempt to load Java logging configuration from "logging.properties" file first,
* and if not found will use default Java logging configuration.
*/
final class JavaLog implements Log {
private static final String JAVA_LOGGER_CONFIG_FILE = "logging.properties";
private static boolean javaLoggingInitialized;
private final Logger logger;
public JavaLog(String name) {
synchronized (JavaLog.class) {
if (!javaLoggingInitialized) {
initializeJavaLogging();
javaLoggingInitialized = true;
}
}
logger = Logger.getLogger(name);
}
public JavaLog(Class klass) {
this(klass.getName());
}
@Override
public String getName() {
return logger.getName();
}
@Override
public void trace(Supplier message) {
logger.finest(message);
}
@Override
public void debug(Supplier message) {
logger.fine(message);
}
@Override
public void info(Supplier message) {
logger.info(message);
}
@Override
public void warn(Supplier message) {
logger.warning(message);
}
@Override
public void error(Supplier message) {
logger.severe(message);
}
private static void initializeJavaLogging() {
try(InputStream in = JavaLog.class.getResourceAsStream(JAVA_LOGGER_CONFIG_FILE)) {
if(in == null) {
String msg =
"No " + JAVA_LOGGER_CONFIG_FILE + " is found in the classpath. " +
"The default java logging properties file will be used";
java.util.logging.Logger.getLogger(JavaLog.class.getName()).warning(msg);
System.out.println(msg);
} else {
LogManager logManager = LogManager.getLogManager();
logManager.readConfiguration(in);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}