Example usage for org.apache.hadoop.fs FileContext util

Introduction

In this page you can find the example usage for org.apache.hadoop.fs FileContext util.

Prototype

Util util

To view the source code for org.apache.hadoop.fs FileContext util.

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Usage

From source file:org.elasticsearch.repositories.hdfs.HdfsBlobContainer.java

License:Apache License

@Override
public boolean blobExists(String blobName) {
    try {// w w w .j a v a2s  .  c  om
        return store.execute(new Operation<Boolean>() {
            @Override
            public Boolean run(FileContext fileContext) throws IOException {
                return fileContext.util().exists(new Path(path, blobName));
            }
        });
    } catch (Exception e) {
        return false;
    }
}

From source file:org.elasticsearch.repositories.hdfs.HdfsBlobContainer.java

License:Apache License

@Override
public Map<String, BlobMetaData> listBlobsByPrefix(@Nullable final String prefix) throws IOException {
    FileStatus[] files = store.execute(new Operation<FileStatus[]>() {
        @Override/*  ww w .j  a  v a 2  s  .  co  m*/
        public FileStatus[] run(FileContext fileContext) throws IOException {
            return (fileContext.util().listStatus(path, new PathFilter() {
                @Override
                public boolean accept(Path path) {
                    return prefix == null || path.getName().startsWith(prefix);
                }
            }));
        }
    });
    Map<String, BlobMetaData> map = new LinkedHashMap<String, BlobMetaData>();
    for (FileStatus file : files) {
        map.put(file.getPath().getName(), new PlainBlobMetaData(file.getPath().getName(), file.getLen()));
    }
    return Collections.unmodifiableMap(map);
}