Example usage for org.apache.hadoop.hdfs.protocol CacheDirectiveEntry CacheDirectiveEntry

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs.protocol CacheDirectiveEntry CacheDirectiveEntry.

Prototype

public CacheDirectiveEntry(CacheDirectiveInfo info, CacheDirectiveStats stats) 

Source Link

Usage

From source file:com.mellanox.r4h.DistributedFileSystem.java

License:Apache License

/**
 * List cache directives. Incrementally fetches results from the server.
 * /*from   w  ww . j a va2  s. co m*/
 * @param filter
 *            Filter parameters to use when listing the directives, null to
 *            list all directives visible to us.
 * @return A RemoteIterator which returns CacheDirectiveInfo objects.
 */
public RemoteIterator<CacheDirectiveEntry> listCacheDirectives(CacheDirectiveInfo filter) throws IOException {
    if (filter == null) {
        filter = new CacheDirectiveInfo.Builder().build();
    }
    if (filter.getPath() != null) {
        filter = new CacheDirectiveInfo.Builder(filter)
                .setPath(new Path(getPathName(fixRelativePart(filter.getPath())))).build();
    }
    final RemoteIterator<CacheDirectiveEntry> iter = dfs.listCacheDirectives(filter);
    return new RemoteIterator<CacheDirectiveEntry>() {
        @Override
        public boolean hasNext() throws IOException {
            return iter.hasNext();
        }

        @Override
        public CacheDirectiveEntry next() throws IOException {
            // Although the paths we get back from the NameNode should always be
            // absolute, we call makeQualified to add the scheme and authority of
            // this DistributedFilesystem.
            CacheDirectiveEntry desc = iter.next();
            CacheDirectiveInfo info = desc.getInfo();
            Path p = info.getPath().makeQualified(getUri(), getWorkingDirectory());
            return new CacheDirectiveEntry(new CacheDirectiveInfo.Builder(info).setPath(p).build(),
                    desc.getStats());
        }
    };
}

---