LogSaverTableUtil.java

/*
 * Copyright © 2014-2015 Cask Data, 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 co.cask.cdap.logging.save;

import co.cask.cdap.api.dataset.DatasetManagementException;
import co.cask.cdap.api.dataset.DatasetProperties;
import co.cask.cdap.api.dataset.table.Table;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.data2.dataset2.DatasetFramework;
import co.cask.cdap.data2.dataset2.lib.table.MetaTableUtil;
import co.cask.cdap.logging.LoggingConfiguration;
import co.cask.cdap.proto.Id;
import com.google.inject.Inject;

import java.io.IOException;

/**
 * Helper class for working with the dataset table used by {@link LogSaver}.
 */
public class LogSaverTableUtil extends MetaTableUtil {
  private static final String TABLE_NAME = LoggingConfiguration.LOG_META_DATA_TABLE;

  @Inject
  public LogSaverTableUtil(DatasetFramework framework, CConfiguration conf) {
    super(framework, conf);
  }

  @Override
  public String getMetaTableName() {
    return TABLE_NAME;
  }

  /**
   * Adds datasets and types to the given {@link DatasetFramework} used by logging system mds.
   *
   * @param datasetFramework framework to add types and datasets to
   */
  public static void setupDatasets(DatasetFramework datasetFramework) throws IOException, DatasetManagementException {
    Id.DatasetInstance logMetaDatasetInstance = Id.DatasetInstance.from(Id.Namespace.SYSTEM, TABLE_NAME);
    datasetFramework.addInstance(Table.class.getName(), logMetaDatasetInstance, DatasetProperties.EMPTY);
  }
}