alluxio-master-2.x/shell/src/main/java/alluxio/cli/fs/command/DistributedLoadCommand.java
/*
 * 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.annotation.PublicApi;
import alluxio.cli.CommandUtils;
import alluxio.client.file.FileSystemContext;
import alluxio.exception.AlluxioException;
import alluxio.exception.status.InvalidArgumentException;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Options;

import java.io.IOException;
import javax.annotation.concurrent.ThreadSafe;

/**
 * Loads a file or directory in Alluxio space, makes it resident in memory.
 */
@ThreadSafe
@PublicApi
public final class DistributedLoadCommand extends AbstractDistributedJobCommand {

  /**
   * Constructs a new instance to load a file or directory in Alluxio space.
   *
   * @param fsContext the filesystem of Alluxio
   */
  public DistributedLoadCommand(FileSystemContext fsContext) {
    super(fsContext);
  }

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

  @Override
  public Options getOptions() {
    return DistributedLoadUtils.getDistLoadFileSemanticsOptions();
  }

  @Override
  public void validateArgs(CommandLine cl) throws InvalidArgumentException {
    CommandUtils.checkNumOfArgsEquals(this, cl, 1);
  }

  @Override
  public String getUsage() {
    return "distributedLoad "
        + DistributedLoadUtils.getDistLoadFileSemanticsUsage()
        + "<path>";
  }

  @Override
  public String getDescription() {
    return "Loads a file or all files in a directory into Alluxio space.";
  }

  @Override
  public int run(CommandLine cl) throws AlluxioException, IOException {
    String[] args = cl.getArgs();
    return DistributedLoadUtils.distributedLoad(this, cl, args[0]);
  }

  @Override
  public void close() throws IOException {
    mClient.close();
  }
}
