hadoop HdfsPartialListing 源码
haddop HdfsPartialListing 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/HdfsPartialListing.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.hdfs.protocol;
import org.apache.hadoop.util.Preconditions;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.ipc.RemoteException;
import java.util.List;
/**
* A partial listing returned by the batched listing API. This is used
* internally by the HDFS client and namenode and is not meant for public
* consumption.
*/
@InterfaceAudience.Private
public class HdfsPartialListing {
private final List<HdfsFileStatus> partialListing;
private final int parentIdx;
private final RemoteException exception;
public HdfsPartialListing(
int parentIdx,
List<HdfsFileStatus> partialListing) {
this(parentIdx, partialListing, null);
}
public HdfsPartialListing(
int parentIdx,
RemoteException exception) {
this(parentIdx, null, exception);
}
private HdfsPartialListing(
int parentIdx,
List<HdfsFileStatus> partialListing,
RemoteException exception) {
Preconditions.checkArgument(partialListing == null ^ exception == null);
this.parentIdx = parentIdx;
this.partialListing = partialListing;
this.exception = exception;
}
public int getParentIdx() {
return parentIdx;
}
public List<HdfsFileStatus> getPartialListing() {
return partialListing;
}
public RemoteException getException() {
return exception;
}
@Override
public String toString() {
return new ToStringBuilder(this)
.append("partialListing", partialListing)
.append("parentIdx", parentIdx)
.append("exception", exception)
.toString();
}
}
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