JdbcSpecificLayer.java

/*
 * 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 gobblin.source.extractor.extract.jdbc;

/**
 * Interface for JDBC sources
 *
 * @author nveeramr
 */
public interface JdbcSpecificLayer {
  /**
   * Url for JDBC connection
   *
   * @return url
   */
  public String getConnectionUrl();

  /**
   * Sample record count specified in input query
   *
   * @param query
   * @return record count
   */
  public long exractSampleRecordCountFromQuery(String query);

  /**
   * Remove sample clause in input query
   *
   * @param query
   * @return query
   */
  public String removeSampleClauseFromQuery(String query);

  /**
   * Remove sample clause
   *
   * @return sample clause
   */
  public String constructSampleClause();
}