hopsworks-master/hopsworks-common/src/main/java/io/hops/hopsworks/common/yarn/YarnClientWrapper.java
/*
 * Changes to this file committed after and not including commit-id: ccc0d2c5f9a5ac661e60e6eaf138de7889928b8b
 * are released under the following license:
 *
 * This file is part of Hopsworks
 * Copyright (C) 2018, Logical Clocks AB. All rights reserved
 *
 * Hopsworks is free software: you can redistribute it and/or modify it under the terms of
 * the GNU Affero General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * Hopsworks is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see <https://www.gnu.org/licenses/>.
 *
 * Changes to this file committed before and including commit-id: ccc0d2c5f9a5ac661e60e6eaf138de7889928b8b
 * are released under the following license:
 *
 * Copyright (C) 2013 - 2018, Logical Clocks AB and RISE SICS AB. All rights reserved
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package io.hops.hopsworks.common.yarn;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.client.api.YarnClient;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class YarnClientWrapper {
  private final Logger LOG = Logger.getLogger(YarnClientWrapper.class.getName());
  private final String projectName;
  private final String username;
  private final Configuration conf;
  private YarnClient yarnClient;
  
  public YarnClientWrapper(String projectName, String username,
      Configuration conf) {
    this.projectName = projectName;
    this.username = username;
    this.conf = conf;
  }
  
  public YarnClientWrapper get() {
    if (yarnClient == null) {
      yarnClient = YarnClient.createYarnClient();
      yarnClient.init(conf);
      yarnClient.start();
    }
    
    return this;
  }
  
  public YarnClient getYarnClient() {
    if (yarnClient == null) {
      throw new RuntimeException("YarnClient has not been initialized");
    }
    
    return yarnClient;
  }
  
  public String getProjectName() {
    return projectName;
  }
  
  public String getUsername() {
    return username;
  }
  
  public void close() {
    if (null != yarnClient) {
      try {
        yarnClient.close();
      } catch (IOException ex) {
        LOG.log(Level.WARNING, "Error while closing YarnClient", ex);
      }
    }
  }
}
