org.elasticsearch.common.logging.ESLoggerFactory Maven / Gradle / Ivy
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.common.logging;
import org.elasticsearch.common.logging.jdk.JdkESLoggerFactory;
import org.elasticsearch.common.logging.log4j.Log4jESLoggerFactory;
import org.elasticsearch.common.logging.slf4j.Slf4jESLoggerFactory;
/**
*
*/
public abstract class ESLoggerFactory {
private static volatile ESLoggerFactory defaultFactory = new JdkESLoggerFactory();
static {
try {
Class loggerClazz = Class.forName("org.apache.log4j.Logger");
// below will throw a NoSuchMethod failure with using slf4j log4j bridge
loggerClazz.getMethod("setLevel", Class.forName("org.apache.log4j.Level"));
defaultFactory = new Log4jESLoggerFactory();
} catch (Throwable e) {
// no log4j
try {
Class.forName("org.slf4j.Logger");
defaultFactory = new Slf4jESLoggerFactory();
} catch (Throwable e1) {
// no slf4j
}
}
}
/**
* Changes the default factory.
*/
public static void setDefaultFactory(ESLoggerFactory defaultFactory) {
if (defaultFactory == null) {
throw new NullPointerException("defaultFactory");
}
ESLoggerFactory.defaultFactory = defaultFactory;
}
public static ESLogger getLogger(String prefix, String name) {
return defaultFactory.newInstance(prefix == null ? null : prefix.intern(), name.intern());
}
public static ESLogger getLogger(String name) {
return defaultFactory.newInstance(name.intern());
}
public static ESLogger getRootLogger() {
return defaultFactory.rootLogger();
}
public ESLogger newInstance(String name) {
return newInstance(null, name);
}
protected abstract ESLogger rootLogger();
protected abstract ESLogger newInstance(String prefix, String name);
}