org.slf4j.plus.ExceptionLoggerFactory Maven / Gradle / Ivy

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/*
 * Copyright 2015-2016 the original author or authors.
 *
 * Licensed 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.slf4j.plus;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

import org.slf4j.Logger;

import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import lombok.NonNull;
import lombok.Setter;

/**
 * {@link LoggerFactory} for {@link ExceptionLogger}
 */
@NoArgsConstructor(access = AccessLevel.PROTECTED) // @checkstyle:ok
public class ExceptionLoggerFactory {
	
	/**
	 * The {@link ExceptionLogger} class
	 */
	@Setter
	@NonNull
	private static Class loggerClass = ExceptionLogger.class;
	
	/**
	 * The max frame length
	 */
	@Setter
	private static int maxFrameLength = 3;
	
	/**
	 * Get a new {@link ExceptionLogger} instance.
	 * 
	 * @param clazz the log class
	 * @return {@link ExceptionLogger}
	 */
	public static ExceptionLogger getLogger(Class clazz) {
		
		return getLogger(LoggerFactory.getLogger(clazz));
	}
	
	/**
	 * Get a new {@link ExceptionLogger} instance.
	 * 
	 * @param name the log name
	 * @return {@link ExceptionLogger}
	 */
	public static ExceptionLogger getLogger(String name) {
		
		return getLogger(LoggerFactory.getLogger(name));
	}
	
	/**
	 * Get a new {@link ExceptionLogger} instance.
	 * 
	 * @param delegate {@link Logger}
	 * @return {@link ExceptionLogger}
	 */
	public static ExceptionLogger getLogger(Logger delegate) {
		
		try {
			
			Constructor constructor = loggerClass.getDeclaredConstructor(Logger.class,
				int.class);
			
			constructor.setAccessible(true);
			
			return constructor.newInstance(delegate, maxFrameLength);
		}
		catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException
			| NoSuchMethodException | SecurityException e) {
			
			throw new IllegalStateException("Failed to create logger instance", e);
		}
	}
	
	/**
	 * Get a new {@link ExceptionLogger} instance. Note: This method uses {@link Throwable#getStackTrace()} to get the
	 * class name.
	 * 
	 * @return {@link ExceptionLogger}
	 */
	public static ExceptionLogger currentClass() {
		
		return getLogger(new Throwable().getStackTrace()[1].getClassName());
	}
}