io.druid.cli.convert.DatabasePropertiesConverter Maven / Gradle / Ivy

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * 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 io.druid.cli.convert;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;

/**
 */
public class DatabasePropertiesConverter implements PropertyConverter
{

  private final List tableProperties = Lists.newArrayList(
      "druid.database.segmentTable",
      "druid.database.configTable",
      "druid.database.ruleTable",
      "druid.database.taskLockTable",
      "druid.database.taskLogTable",
      "druid.database.taskTable"
  );
  private AtomicBoolean ran = new AtomicBoolean(false);

  @Override
  public boolean canHandle(String property)
  {
    return tableProperties.contains(property) && !ran.get();
  }

  @Override
  public Map convert(Properties properties)
  {
    if (!ran.getAndSet(true)) {
      String tablePrefix = properties.getProperty("druid.database.segmentTable");

      if (tablePrefix == null) {
        tablePrefix = "druid";
      }
      else {
        tablePrefix = tablePrefix.split("_")[0];
      }

      Map retVal = Maps.newLinkedHashMap();

      retVal.put("druid.db.tables.base", tablePrefix);

      addIfNotDefault(properties, tablePrefix, retVal, "druid.database.segmentTable", "segments");
      addIfNotDefault(properties, tablePrefix, retVal, "druid.database.configTable", "config");
      addIfNotDefault(properties, tablePrefix, retVal, "druid.database.ruleTable", "rules");
      addIfNotDefault(properties, tablePrefix, retVal, "druid.database.taskTable", "tasks");
      addIfNotDefault(properties, tablePrefix, retVal, "druid.database.taskLockTable", "taskLock");
      addIfNotDefault(properties, tablePrefix, retVal, "druid.database.taskLogTable", "taskLog");

      return retVal;
    }
    return ImmutableMap.of();
  }

  private void addIfNotDefault(
      Properties properties,
      String tablePrefix,
      Map retVal,
      String property,
      String tablename
  )
  {
    final String value = properties.getProperty(property);
    if (value != null) {
      if (!value.equals(String.format("%s_%s", tablePrefix, tablename))) {
        retVal.put(String.format("druid.db.tables.%s", tablename), value);
      }
    }
  }
}