com.ibm.mqlight.api.logging.LoggerFactory Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 com.ibm.mqlight.api.logging;
import java.lang.reflect.Constructor;
/**
* Factory to obtain a {@link Logger} implementation.
*/
public abstract class LoggerFactory {
public static final String LOGGER_FACTORY_IMPL_CLASS_NAME= "com.ibm.mqlight.api.impl.logging.LoggerFactoryImpl";
/** Implementation of a {@link LoggerFactory} */
private static final LoggerFactory impl;
static {
LoggerFactory loggerFactoryImpl;
try {
Class classToInstantiate = Class.forName(LOGGER_FACTORY_IMPL_CLASS_NAME);
Constructor constructor = classToInstantiate.getDeclaredConstructor(new Class[] {});
constructor.setAccessible(true);
loggerFactoryImpl = (LoggerFactory) constructor.newInstance(new Object[] {});
} catch (Exception exception) {
// No FFDC Code Needed.
// We may not have any FFDC instantiated so simply print the stack.
exception.printStackTrace();
// Assume we have no chained exception support.
throw new Error(exception.toString());
}
impl = loggerFactoryImpl;
}
/**
* Obtains a {@link Logger} implementation for the specified class.
*
* @param clazz Class to be associated with the logger instance.
* @return {@link Logger} instance for trace and information logging.
*/
public static Logger getLogger(Class clazz) {
return impl.getLoggerImpl(clazz);
}
/**
* Obtains a {@link Logger} implementation for the specified {@link org.slf4j.Logger}.
*
* @param logger The {@link org.slf4j.Logger} to be associated with the logger instance.
* @return {@link Logger} instance for trace and information logging.
*/
public static Logger getLogger(org.slf4j.Logger logger) {
return impl.getLoggerImpl(logger);
}
/**
* Internal method to obtain the {@link Logger} implementation from the static {@link LoggerFactory} implementation.
*
* @param clazz Class to be associated with the logger instance.
* @return {@link Logger} instance for trace and information logging.
*/
protected abstract Logger getLoggerImpl(Class clazz);
/**
* Internal method to obtain the {@link Logger} implementation from the static {@link LoggerFactory} implementation.
*
* @param logger The SLF4J logger instance.
* @return {@link Logger} instance for trace and information logging.
*/
protected abstract Logger getLoggerImpl(org.slf4j.Logger logger);
}