/*
* Copyright (c) 2009 Red Hat, Inc.
* -------------------------------------
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package io.vertx.core.logging.impl;
import io.vertx.core.logging.Logger;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* @author <a href="http://tfox.org">Tim Fox</a>
*/
public class LoggerFactory {
public static final String LOGGER_DELEGATE_FACTORY_CLASS_NAME = "vertx.logger-delegate-factory-class-name";
private static volatile LogDelegateFactory delegateFactory;
private static final ConcurrentMap<String, Logger> loggers = new ConcurrentHashMap<>();
static {
initialise();
}
public static synchronized void initialise() {
LogDelegateFactory delegateFactory;
// If a system property is specified then this overrides any delegate factory which is set
// programmatically - this is primarily of use so we can configure the logger delegate on the client side.
// call to System.getProperty is wrapped in a try block as it will fail if the client runs in a secured
// environment
String className = JULLogDelegateFactory.class.getName();
try {
className = System.getProperty(LOGGER_DELEGATE_FACTORY_CLASS_NAME);
} catch (Exception e) {
}
if (className != null) {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
try {
Class<?> clz = loader.loadClass(className);
delegateFactory = (LogDelegateFactory) clz.newInstance();
} catch (Exception e) {
throw new IllegalArgumentException("Error instantiating transformer class \"" + className + "\"", e);
}
} else {
delegateFactory = new JULLogDelegateFactory();
}
LoggerFactory.delegateFactory = delegateFactory;
}
public static Logger getLogger(final Class<?> clazz) {
return getLogger(clazz.getCanonicalName());
}
public static Logger getLogger(final String name) {
Logger logger = loggers.get(name);
if (logger == null) {
LogDelegate delegate = delegateFactory.createDelegate(name);
logger = new Logger(delegate);
Logger oldLogger = loggers.putIfAbsent(name, logger);
if (oldLogger != null) {
logger = oldLogger;
}
}
return logger;
}
public static void removeLogger(String name) {
loggers.remove(name);
}
}