hadoop SpillCallBackInjector 源码
haddop SpillCallBackInjector 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/security/SpillCallBackInjector.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.mapreduce.security;
import java.io.IOException;
import java.io.InputStream;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.classification.VisibleForTesting;
/**
* Used for injecting callbacks while spilling files.
* Calls into this are a no-op in production code.
*/
@VisibleForTesting
@InterfaceAudience.Private
public class SpillCallBackInjector {
private static SpillCallBackInjector instance = new SpillCallBackInjector();
public static SpillCallBackInjector get() {
return instance;
}
/**
* Sets the global SpillFilesCBInjector to the new value, returning the old
* value.
*
* @param spillInjector the new implementation for the spill injector.
* @return the previous implementation.
*/
public static SpillCallBackInjector getAndSet(
SpillCallBackInjector spillInjector) {
SpillCallBackInjector prev = instance;
instance = spillInjector;
return prev;
}
public void writeSpillIndexFileCB(Path path) {
// do nothing
}
public void writeSpillFileCB(Path path, FSDataOutputStream out,
Configuration conf) {
// do nothing
}
public void getSpillFileCB(Path path, InputStream is, Configuration conf) {
// do nothing
}
public String getSpilledFileReport() {
return null;
}
public void handleErrorInSpillFill(Path path, Exception e) {
// do nothing
}
public void corruptSpilledFile(Path fileName) throws IOException {
// do nothing
}
public void addSpillIndexFileCB(Path path, Configuration conf) {
// do nothing
}
public void validateSpillIndexFileCB(Path path, Configuration conf) {
// do nothing
}
}
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