cascading.tap.hadoop.StreamedFileSystem.java Source code

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Here is the source code for cascading.tap.hadoop.StreamedFileSystem.java

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/*
 * Copyright (c) 2007-2010 Concurrent, Inc. All Rights Reserved.
 *
 * Project and contact information: http://www.cascading.org/
 *
 * This file is part of the Cascading project.
 *
 * Cascading is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Cascading is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cascading.  If not, see <http://www.gnu.org/licenses/>.
 */

package cascading.tap.hadoop;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.util.Progressable;

/** Class StreamedFileSystem is a base class for {@link FileSystem} implementations that manage remote resources. */
public abstract class StreamedFileSystem extends FileSystem {
    @Override
    public FSDataOutputStream create(Path path, FsPermission permission, boolean overwrite, int bufferSize,
            short replication, long blockSize, Progressable progress) throws IOException {
        throw new UnsupportedOperationException("not supported");
    }

    @Override
    public boolean rename(Path path, Path path1) throws IOException {
        throw new UnsupportedOperationException("not supported");
    }

    @Deprecated
    @Override
    public boolean delete(Path path) throws IOException {
        throw new UnsupportedOperationException("not supported");
    }

    @Override
    public boolean delete(Path path, boolean b) throws IOException {
        throw new UnsupportedOperationException("not supported");
    }

    @Override
    public Path getWorkingDirectory() {
        return new Path("/").makeQualified(this);
    }

    @Override
    public void setWorkingDirectory(Path f) {
    }

    @Override
    public boolean mkdirs(Path path, FsPermission fsPermission) throws IOException {
        throw new UnsupportedOperationException("not supported");
    }

    @Override
    public FileStatus[] listStatus(Path path) throws IOException {
        return new FileStatus[] { getFileStatus(path) };
    }

    public FSDataOutputStream append(Path f, int bufferSize, Progressable progress) throws IOException {
        throw new UnsupportedOperationException("not supported");
    }

    public static String getMD5SumFor(Configuration conf, Path path) {
        return getMD5SumFor(conf, path.toString());
    }

    public static String getMD5SumFor(Configuration conf, String path) {
        return conf.get(path + ".md5");
    }

    public static void setMD5SumFor(Configuration conf, Path path, String md5Hex) {
        setMD5SumFor(conf, path.toString(), md5Hex);
    }

    public static void setMD5SumFor(Configuration conf, String path, String md5Hex) {
        if (md5Hex == null || md5Hex.length() == 0)
            return;

        conf.set(path + ".md5", md5Hex);
    }
}