/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.iotdb.db.conf;

import org.apache.iotdb.commons.file.SystemPropertiesHandler;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;

import static org.apache.iotdb.db.conf.IoTDBStartCheck.PROPERTIES_FILE_NAME;

public class DataNodeSystemPropertiesHandler extends SystemPropertiesHandler {
  private static final Logger LOGGER =
      LoggerFactory.getLogger(DataNodeSystemPropertiesHandler.class);

  private static DataNodeSystemPropertiesHandler INSTANCE;

  private DataNodeSystemPropertiesHandler(String filePath) {
    super(filePath);
  }

  public static SystemPropertiesHandler getInstance() {
    if (INSTANCE == null) {
      synchronized (DataNodeSystemPropertiesHandler.class) {
        INSTANCE =
            new DataNodeSystemPropertiesHandler(
                IoTDBDescriptor.getInstance().getConfig().getSystemDir()
                    + File.separator
                    + PROPERTIES_FILE_NAME);
        INSTANCE.init();
      }
    }
    return INSTANCE;
  }
}
