almira.sample.util.LogPostProcessor.java Source code

Introduction

Here is the source code for almira.sample.util.LogPostProcessor.java

Source

/*
 * Copyright 2008-2012 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 almira.sample.util;

import java.lang.reflect.Field;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.ReflectionUtils.FieldCallback;

/**
 * Injects slf4J logger into Spring Beans with Log annotation.
 * See: http://www.javacodegeeks.com/2011/12/configure-logback-logging-with-spring.html
 */

@Component
public class LogPostProcessor implements BeanPostProcessor {

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) {
        return bean;
    }

    @Override
    public Object postProcessBeforeInitialization(final Object bean, String beanName) {
        ReflectionUtils.doWithFields(bean.getClass(), new FieldCallback() {
            @Override
            public void doWith(Field field) throws IllegalAccessException {
                ReflectionUtils.makeAccessible(field);
                if (field.getAnnotation(Log.class) != null) {
                    Logger logger = LoggerFactory.getLogger(bean.getClass().getName());
                    field.set(bean, logger);
                }
            }
        });
        return bean;
    }
}