content: /*
   * 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.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 java.io.IOException;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Marks a path in Alluxio as needing metadata synchronization with the UFS.
   * The next time the path or any child path is accessed a metadata sync for
   * that path will be performed.
   */
  @ThreadSafe
  @PublicApi
  public class NeedsSyncCommand extends AbstractFileSystemCommand {
  
    /**
     * Constructs a new instance of a needsSync command for the given Alluxio path.
     *
     * @param fsContext the filesystem of Alluxio
     */
    public NeedsSyncCommand(FileSystemContext fsContext) {
      super(fsContext);
    }
  
    @Override
    public String getCommandName() {
      return "needsSync";
    }
  
    @Override
    protected void runPlainPath(AlluxioURI plainPath, CommandLine cl)
        throws AlluxioException, IOException {
      needsSync(plainPath);
    }
  
    @Override
    public int run(CommandLine cl) throws AlluxioException, IOException {
      String[] args = cl.getArgs();
      AlluxioURI path = new AlluxioURI(args[0]);
      runWildCardCmd(path, cl);
  
      return 0;
    }
  
    private void needsSync(AlluxioURI path) throws IOException {
      try {
        mFileSystem.needsSync(path);
      } catch (AlluxioException e) {
        throw new IOException(e.getMessage());
      }
    }
  
    @Override
    public String getUsage() {
      return "needsSync <path>";
    }
  
    @Override
    public String getDescription() {
      return "Marks the path in Alluxio as needing synchronization with the under file system. "
          + "The next time the path or any of its children are accessed a metadata synchronization"
          + " will be performed.";
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      CommandUtils.checkNumOfArgsEquals(this, cl, 1);
    }
  }
  