hadoop FsStatus 源码
haddop FsStatus 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsStatus.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.fs;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.io.Writable;
/** This class is used to represent the capacity, free and used space on a
* {@link FileSystem}.
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public class FsStatus implements Writable {
private long capacity;
private long used;
private long remaining;
/**
* Construct a FsStatus object, using the specified statistics.
*
* @param capacity capacity.
* @param used used.
* @param remaining remaining.
*/
public FsStatus(long capacity, long used, long remaining) {
this.capacity = capacity;
this.used = used;
this.remaining = remaining;
}
/**
* Return the capacity in bytes of the file system.
* @return capacity.
*/
public long getCapacity() {
return capacity;
}
/**
* Return the number of bytes used on the file system.
* @return used.
*/
public long getUsed() {
return used;
}
/**
* Return the number of remaining bytes on the file system.
* @return remaining.
*/
public long getRemaining() {
return remaining;
}
//////////////////////////////////////////////////
// Writable
//////////////////////////////////////////////////
@Override
public void write(DataOutput out) throws IOException {
out.writeLong(capacity);
out.writeLong(used);
out.writeLong(remaining);
}
@Override
public void readFields(DataInput in) throws IOException {
capacity = in.readLong();
used = in.readLong();
remaining = in.readLong();
}
}
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