alluxio.shell.command.MountCommand Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of alluxio-shell Show documentation

A Linux shell-like interface to interact with Alluxio

There is a newer version: 1.8.1

/*
 * 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.shell.command;

import alluxio.AlluxioURI;
import alluxio.Configuration;
import alluxio.client.file.FileSystem;
import alluxio.exception.AlluxioException;

import org.apache.commons.cli.CommandLine;

import java.io.IOException;

import javax.annotation.concurrent.ThreadSafe;

/**
 * Mounts a UFS path onto an Alluxio path.
 */
@ThreadSafe
public final class MountCommand extends AbstractShellCommand {

  /**
   * @param conf the configuration for Alluxio
   * @param fs the filesystem of Alluxio
   */
  public MountCommand(Configuration conf, FileSystem fs) {
    super(conf, fs);
  }

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

  @Override
  protected int getNumOfArgs() {
    return 2;
  }

  @Override
  public void run(CommandLine cl) throws IOException {
    String[] args = cl.getArgs();
    AlluxioURI alluxioPath = new AlluxioURI(args[0]);
    AlluxioURI ufsPath = new AlluxioURI(args[1]);
    try {
      mFileSystem.mount(alluxioPath, ufsPath);
      System.out.println("Mounted " + ufsPath + " at " + alluxioPath);
    } catch (AlluxioException e) {
      throw new IOException(e.getMessage());
    }
  }

  @Override
  public String getUsage() {
    return "mount  ";
  }

  @Override
  public String getDescription() {
    return "Mounts a UFS path onto an Alluxio path.";
  }
}