cascading.tap.hadoop.io.StreamedFileSystem.java Source code

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

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/*
 * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved.
 *
 * Project and contact information: http://www.cascading.org/
 *
 * This file is part of the Cascading project.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cascading.tap.hadoop.io;

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);
    }
}