io.hops.transaction.lock.CachedBlockLock.java Source code

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Here is the source code for io.hops.transaction.lock.CachedBlockLock.java

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/*
 * 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 com.google.common.primitives.Longs;
import io.hops.common.INodeUtil;
import io.hops.metadata.hdfs.entity.CachedBlock;
import java.io.IOException;
import java.util.Collection;
import java.util.List;
import org.apache.hadoop.hdfs.protocol.DatanodeID;

public class CachedBlockLock extends Lock {

    private long[] blockIds;
    private DatanodeID datanodeId;
    private Collection<CachedBlock> cachedBlocks;

    public CachedBlockLock(List<Long> blockIds, DatanodeID datanodeId) {
        this.blockIds = Longs.toArray(blockIds);
        this.datanodeId = datanodeId;
    }

    public CachedBlockLock(DatanodeID datanodeId) {
        this.datanodeId = datanodeId;
    }

    @Override
    protected void acquire(TransactionLocks locks) throws IOException {
        cachedBlocks = acquireLockList(TransactionLockTypes.LockType.WRITE, CachedBlock.Finder.ByDatanodeId,
                datanodeId);
        if (blockIds != null) {
            long[] inodeIds = INodeUtil.resolveINodesFromBlockIds(blockIds);
            cachedBlocks.addAll(acquireLockList(TransactionLockTypes.LockType.WRITE,
                    CachedBlock.Finder.ByBlockIdsAndINodeIds, blockIds, inodeIds, datanodeId));
        }

    }

    @Override
    protected Lock.Type getType() {
        return Lock.Type.CachedBlock;
    }

    public Collection<CachedBlock> getAllResolvedCachedBlock() {
        return cachedBlocks;
    }
}