hadoop Log4jPropertyHelper 源码
haddop Log4jPropertyHelper 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/src/main/java/org/apache/hadoop/yarn/applications/distributedshell/Log4jPropertyHelper.java
/**
* 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 org.apache.hadoop.yarn.applications.distributedshell;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Map.Entry;
import java.util.Properties;
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();
try (
FileInputStream fs = new FileInputStream(log4jPath);
InputStream 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);
}
}
}
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