Log4jPropertyHelper.java Source code

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Here is the source code for Log4jPropertyHelper.java

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/**
 * 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.
 */

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Map.Entry;
import java.util.Properties;

import org.apache.commons.io.IOUtils;
import org.apache.log4j.LogManager;
import org.apache.log4j.PropertyConfigurator;

public class Log4jPropertyHelper {

    public static void updateLog4jConfiguration(Class<?> targetClass, String log4jPath) throws Exception {
        Properties customProperties = new Properties();
        FileInputStream fs = null;
        InputStream is = null;
        try {
            fs = new FileInputStream(log4jPath);
            is = targetClass.getResourceAsStream("/log4j.properties");
            customProperties.load(fs);
            Properties originalProperties = new Properties();
            originalProperties.load(is);
            for (Entry<Object, Object> entry : customProperties.entrySet()) {
                originalProperties.setProperty(entry.getKey().toString(), entry.getValue().toString());
            }
            LogManager.resetConfiguration();
            PropertyConfigurator.configure(originalProperties);
        } finally {
            IOUtils.closeQuietly(is);
            IOUtils.closeQuietly(fs);
        }
    }
}