library/src/main/java/com/datatorrent/lib/db/TransactionableStore.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 com.datatorrent.lib.db;

/**
 * This interface is for a store that supports transactions
 *
 * @since 0.9.3
 */
public interface TransactionableStore extends Transactionable, Connectable
{
  /**
   * Gets the committed window id from a persistent store.
   *
   * @param appId      application id
   * @param operatorId operator id
   * @return the committed window id
   */
  public long getCommittedWindowId(String appId, int operatorId);

  /**
   * Stores the committed window id to a persistent store.
   *
   * @param appId      application id
   * @param operatorId operator id
   * @param windowId   window id
   */
  public void storeCommittedWindowId(String appId, int operatorId, long windowId);

  /**
   * Removes the committed window id from a persistent store.
   *
   * @param appId
   * @param operatorId
   */
  public void removeCommittedWindowId(String appId, int operatorId);
}