HdfsController.java

// Copyright 2016 Twitter. All rights reserved.
//
// 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 com.twitter.heron.uploader.hdfs;

import com.twitter.heron.spi.utils.ShellUtils;

public class HdfsController {
  private final String configDir;
  private final boolean isVerbose;

  public HdfsController(String configDir, boolean isVerbose) {
    this.configDir = configDir;
    this.isVerbose = isVerbose;
  }

  public boolean exists(String filePath) {
    String command = String.format("hadoop --config %s fs -test -e %s", configDir, filePath);
    return 0 == ShellUtils.runProcess(command, null);
  }

  public boolean mkdirs(String dir) {
    String command = String.format("hadoop --config %s fs -mkdir -p %s", configDir, dir);
    return 0 == ShellUtils.runProcess(command, null);
  }

  public boolean copyFromLocalFile(String source, String destination) {
    String command = String.format("hadoop --config %s fs -copyFromLocal -f %s %s",
        configDir, source, destination);
    return 0 == ShellUtils.runProcess(command, null);
  }

  public boolean delete(String filePath) {
    String command = String.format("hadoop --config %s fs -rm %s", configDir, filePath);
    return 0 == ShellUtils.runProcess(command, null);
  }
}