/*
* Copyright (C) 2015 hops.io.
*
* Licensed 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 io.hops.transaction.lock;
import io.hops.metadata.hdfs.entity.LeasePath;
import org.apache.hadoop.hdfs.server.namenode.INode;
import java.io.IOException;
import java.util.Collection;
final class LastTwoBlocksLock extends IndividualBlockLock{
private final String path;
public LastTwoBlocksLock(String src){
super();
this.path = src;
}
@Override
protected void acquire(TransactionLocks locks) throws IOException {
INodeLock iNodeLock = (INodeLock) locks.getLock(Type.INode);
LeasePathLock leasePathLock = (LeasePathLock) locks.getLock(Type.LeasePath);
Collection<LeasePath> lps = leasePathLock.getLeasePaths();
for(LeasePath lp : lps){
if(lp.getPath().equals(path)){
INode targetInode = iNodeLock.getTargetINode(path);
readBlock(lp.getLastBlockId(), targetInode.getId());
readBlock(lp.getPenultimateBlockId(), targetInode.getId());
if(getBlocks() == null || getBlocks().isEmpty()){
announceEmptyFile(targetInode.getId());
}
break;
}
}
}
}