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

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Here is the source code for io.hops.transaction.lock.IndividualBlockLock.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 io.hops.metadata.hdfs.entity.INodeIdentifier;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.namenode.INode;

import java.io.IOException;

class IndividualBlockLock extends BaseIndividualBlockLock {

    private final static long NON_EXISTING_BLOCK = Long.MIN_VALUE;
    protected final long blockId;
    private final int inodeId;

    public IndividualBlockLock() {
        this.blockId = NON_EXISTING_BLOCK;
        this.inodeId = INode.NON_EXISTING_ID;
    }

    IndividualBlockLock(long blockId, INodeIdentifier inode) {
        this.blockId = blockId;
        this.inodeId = inode == null ? INode.NON_EXISTING_ID : inode.getInodeId();
    }

    @Override
    protected void acquire(TransactionLocks locks) throws IOException {
        if (blockId != NON_EXISTING_BLOCK) {
            BlockInfo result = acquireLock(DEFAULT_LOCK_TYPE, BlockInfo.Finder.ByBlockIdAndINodeId, blockId,
                    inodeId);
            if (result != null) {
                blocks.add(result);
            } else {
                //TODO fix this add a method to bring null in the others caches 
                BlockInfo dummy = new BlockInfo();
                dummy.setINodeIdNoPersistance(inodeId);
                dummy.setBlockIdNoPersistance(blockId);
                blocks.add(dummy);
            }
        }
    }
}