org.apache.hadoop.io.erasurecode.ECBlockGroup Maven / Gradle / Ivy
/**
* 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.io.erasurecode;
import org.apache.hadoop.classification.InterfaceAudience;
/**
* A group of blocks or {@link ECBlock} incurred in an erasure coding task.
*/
@InterfaceAudience.Private
public class ECBlockGroup {
private ECBlock[] dataBlocks;
private ECBlock[] parityBlocks;
/**
* A constructor specifying data blocks and parity blocks.
* @param dataBlocks data blocks in the group
* @param parityBlocks parity blocks in the group
*/
public ECBlockGroup(ECBlock[] dataBlocks, ECBlock[] parityBlocks) {
this.dataBlocks = dataBlocks;
this.parityBlocks = parityBlocks;
}
/**
* Get data blocks
* @return data blocks
*/
public ECBlock[] getDataBlocks() {
return dataBlocks;
}
/**
* Get parity blocks
* @return parity blocks
*/
public ECBlock[] getParityBlocks() {
return parityBlocks;
}
/**
* Any erased data block?
* @return true if any erased data block, false otherwise
*/
public boolean anyErasedDataBlock() {
for (int i = 0; i < dataBlocks.length; ++i) {
if (dataBlocks[i].isErased()) {
return true;
}
}
return false;
}
/**
* Any erased parity block?
* @return true if any erased parity block, false otherwise
*/
public boolean anyErasedParityBlock() {
for (int i = 0; i < parityBlocks.length; ++i) {
if (parityBlocks[i].isErased()) {
return true;
}
}
return false;
}
/**
* Get erased blocks count
* @return erased count of blocks
*/
public int getErasedCount() {
int erasedCount = 0;
for (ECBlock dataBlock : dataBlocks) {
if (dataBlock.isErased()) erasedCount++;
}
for (ECBlock parityBlock : parityBlocks) {
if (parityBlock.isErased()) erasedCount++;
}
return erasedCount;
}
}