hadoop OutputUtil 源码
haddop OutputUtil 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/main/java/org/apache/hadoop/mapred/nativetask/util/OutputUtil.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.mapred.nativetask.util;
import java.lang.reflect.Constructor;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@InterfaceAudience.Private
public class OutputUtil {
private static final Logger LOG = LoggerFactory.getLogger(OutputUtil.class);
public static final String NATIVE_TASK_OUTPUT_MANAGER = "nativetask.output.manager";
public static NativeTaskOutput createNativeTaskOutput(Configuration conf, String id) {
Class<?> clazz = conf.getClass(OutputUtil.NATIVE_TASK_OUTPUT_MANAGER,
NativeTaskOutputFiles.class);
LOG.info(OutputUtil.NATIVE_TASK_OUTPUT_MANAGER + " = " + clazz.getName());
try {
Constructor<?> ctor = clazz.getConstructor(Configuration.class, String.class);
ctor.setAccessible(true);
NativeTaskOutput instance = (NativeTaskOutput) ctor.newInstance(conf, id);
return instance;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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