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Spring Framework example source code file (CommonsLogFactoryBean.java)

This example Spring Framework source code file (CommonsLogFactoryBean.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

class, commonslogfactorybean, commonslogfactorybean, factorybean, factorybean, illegalargumentexception, initializingbean, initializingbean, log, object, object

The Spring Framework CommonsLogFactoryBean.java source code

 * Copyright 2002-2005 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.springframework.beans.factory.config;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;

 * Factory bean for
 * <a href="http://jakarta.apache.org/commons/logging.html">commons-logging
 * {@link org.apache.commons.logging.Log} instances.
 * <p>Useful for sharing Log instances among multiple beans instead of using
 * one Log instance per class name, e.g. for common log topics.
 * @author Juergen Hoeller
 * @see org.apache.commons.logging.Log
 * @since 16.11.2003
public class CommonsLogFactoryBean implements FactoryBean, InitializingBean {

    private Log log;

     * The name of the log.
     * <p>This property is required.
     * @param logName the name of the log
    public void setLogName(String logName) {
        this.log = LogFactory.getLog(logName);

    public void afterPropertiesSet() {
        if (this.log == null) {
            throw new IllegalArgumentException("logName is required");

    public Object getObject() {
        return log;

    public Class getObjectType() {
        return (this.log != null ? this.log.getClass() : Log.class);

    public boolean isSingleton() {
        return true;


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