alluxio.cli.fs.command.DistributedMvCommand.java Source code

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Here is the source code for alluxio.cli.fs.command.DistributedMvCommand.java

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/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.cli.fs.command;

import alluxio.AlluxioURI;
import alluxio.Constants;
import alluxio.cli.CommandUtils;
import alluxio.client.file.FileSystem;
import alluxio.client.job.JobThriftClientUtils;
import alluxio.exception.AlluxioException;
import alluxio.exception.status.InvalidArgumentException;
import alluxio.job.move.MoveConfig;

import org.apache.commons.cli.CommandLine;

import java.io.IOException;

import javax.annotation.concurrent.ThreadSafe;

/**
 * Renames a file or directory specified by args. Will fail if the new path name already exists.
 */
@ThreadSafe
public final class DistributedMvCommand extends AbstractFileSystemCommand {

    /**
     * @param fs the filesystem of Alluxio
     */
    public DistributedMvCommand(FileSystem fs) {
        super(fs);
    }

    @Override
    public String getCommandName() {
        return "distributedMv";
    }

    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
        CommandUtils.checkNumOfArgsEquals(this, cl, 2);
    }

    @Override
    public int run(CommandLine cl) throws AlluxioException, IOException {
        String[] args = cl.getArgs();
        AlluxioURI srcPath = new AlluxioURI(args[0]);
        AlluxioURI dstPath = new AlluxioURI(args[1]);
        if (mFileSystem.exists(dstPath)) {
            throw new RuntimeException(dstPath + " already exists");
        }
        Thread thread = JobThriftClientUtils.createProgressThread(2 * Constants.SECOND_MS, System.out);
        thread.start();
        try {
            JobThriftClientUtils.run(new MoveConfig(srcPath.getPath(), dstPath.getPath(), null, true), 3);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            return -1;
        } finally {
            thread.interrupt();
        }
        System.out.println("Moved " + srcPath + " to " + dstPath);
        return 0;
    }

    @Override
    public String getUsage() {
        return "distributedMv <src> <dst>";
    }

    @Override
    public String getDescription() {
        return "Moves a file or directory.";
    }
}