Example usage for org.apache.hadoop.hdfs DFSClient getLocatedBlocks

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs DFSClient getLocatedBlocks.

Prototype

@VisibleForTesting
    public LocatedBlocks getLocatedBlocks(String src, long start, long length) throws IOException 

Source Link

Usage

From source file:backup.namenode.NameNodeBackupBlockCheckProcessor.java

License:Apache License

private void addExtendedBlocksFromNameNode(BackupReportWriter writer,
        ExternalExtendedBlockSort<Addresses> nameNodeBlocks, DFSClient client, FileStatus fs,
        Set<Path> pathSetToIgnore) throws IOException {
    Path qualifiedPath = fileSystem.makeQualified(fs.getPath());
    if (shouldIgnore(pathSetToIgnore, qualifiedPath)) {
        return;// www  .  ja v  a 2s  .  c  om
    }

    String src = qualifiedPath.toUri().getPath();
    long start = 0;
    long length = fs.getLen();

    LocatedBlocks locatedBlocks = client.getLocatedBlocks(src, start, length);
    for (LocatedBlock locatedBlock : locatedBlocks.getLocatedBlocks()) {
        DatanodeInfo[] locations = locatedBlock.getLocations();
        ExtendedBlock extendedBlock = BackupUtil.fromHadoop(locatedBlock.getBlock());
        Addresses addresses = new Addresses(locations);
        nameNodeBlocks.add(extendedBlock, addresses);
        writer.statusExtendedBlocksFromNameNode(src, extendedBlock, locations);
    }
}

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