Example usage for org.apache.hadoop.hdfs.server.namenode INodeFile getLastBlock

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs.server.namenode INodeFile getLastBlock.

Prototype

@Override
    public BlockInfo getLastBlock() 

Source Link

Usage

From source file:io.hops.transaction.lock.LastBlockReplicasHashBucketLock.java

License:Apache License

@Override
protected void acquire(TransactionLocks locks) throws IOException {
    BlockLock blockLock = (BlockLock) locks.getLock(Type.Block);
    for (INodeFile iNodeFile : blockLock.getFiles()) {
        Block lastBlock = iNodeFile.getLastBlock();
        if (iNodeFile.getLastBlock() != null) {
            List<Replica> replicas = (List<Replica>) EntityManager.findList(Replica.Finder.ByBlockIdAndINodeId,
                    lastBlock.getBlockId(), iNodeFile.getId());
            if (replicas != null) {
                Collections.sort(replicas, new Comparator<Replica>() {
                    @Override//from  w  ww.  j av a  2s  . c o m
                    public int compare(Replica o1, Replica o2) {
                        return new Integer(o1.getBucketId()).compareTo(o2.getBucketId());
                    }
                });

                //FIXME-BR why lock buckets for all the replicas. Only the last
                // replica should be locked. Am I missing something
                for (Replica replica : replicas) {
                    EntityManager.find(HashBucket.Finder.ByStorageIdAndBucketId, replica.getStorageId(),
                            replica.getBucketId());
                }
            }
        }
    }
}

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