hadoop FileRangeImpl 源码
haddop FileRangeImpl 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/FileRangeImpl.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.impl;
import java.nio.ByteBuffer;
import java.util.concurrent.CompletableFuture;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.fs.FileRange;
/**
* A range of bytes from a file with an optional buffer to read those bytes
* for zero copy. This shouldn't be created directly via constructor rather
* factory defined in {@code FileRange#createFileRange} should be used.
*/
@InterfaceAudience.Private
public class FileRangeImpl implements FileRange {
private long offset;
private int length;
private CompletableFuture<ByteBuffer> reader;
public FileRangeImpl(long offset, int length) {
this.offset = offset;
this.length = length;
}
@Override
public String toString() {
return "range[" + offset + "," + (offset + length) + ")";
}
@Override
public long getOffset() {
return offset;
}
@Override
public int getLength() {
return length;
}
public void setOffset(long offset) {
this.offset = offset;
}
public void setLength(int length) {
this.length = length;
}
@Override
public void setData(CompletableFuture<ByteBuffer> pReader) {
this.reader = pReader;
}
@Override
public CompletableFuture<ByteBuffer> getData() {
return reader;
}
}
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