io.netty.util.internal.logging.Slf4JLoggerFactory Maven / Gradle / Ivy
/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.util.internal.logging;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.helpers.NOPLoggerFactory;
import org.slf4j.spi.LocationAwareLogger;
/**
* Logger factory which creates a SLF4J
* logger.
*/
public class Slf4JLoggerFactory extends InternalLoggerFactory {
@SuppressWarnings("deprecation")
public static final InternalLoggerFactory INSTANCE = new Slf4JLoggerFactory();
/**
* @deprecated Use {@link #INSTANCE} instead.
*/
@Deprecated
public Slf4JLoggerFactory() {
}
Slf4JLoggerFactory(boolean failIfNOP) {
assert failIfNOP; // Should be always called with true.
if (LoggerFactory.getILoggerFactory() instanceof NOPLoggerFactory) {
throw new NoClassDefFoundError("NOPLoggerFactory not supported");
}
}
@Override
public InternalLogger newInstance(String name) {
return wrapLogger(LoggerFactory.getLogger(name));
}
// package-private for testing.
static InternalLogger wrapLogger(Logger logger) {
return logger instanceof LocationAwareLogger ?
new LocationAwareSlf4JLogger((LocationAwareLogger) logger) : new Slf4JLogger(logger);
}
static InternalLoggerFactory getInstanceWithNopCheck() {
return NopInstanceHolder.INSTANCE_WITH_NOP_CHECK;
}
private static final class NopInstanceHolder {
private static final InternalLoggerFactory INSTANCE_WITH_NOP_CHECK = new Slf4JLoggerFactory(true);
}
}