content: /*
   * 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 io.ray.streaming.state;
  
  /**
   * TransactionState interface.
   *
   * <p>Streaming State should implement transaction in case of failure, which in our case is four
   * default method, finish, commit, ackCommit, rollback.
   */
  public interface StateStoreManager {
  
    /**
     * The finish method is used when the batched data is all saved in state. Normally, serialization
     * job is done here.
     */
    void finish(long checkpointId);
  
    /**
     * The commit method is used for persistent, and can be used in another thread to reach async
     * state commit. Normally, data persistent is done here.
     */
    void commit(long checkpointId);
  
    /**
     * The ackCommit method is used for cleaning the last checkpoint, and must be called after commit
     * in the same thread.
     */
    void ackCommit(long checkpointId, long timeStamp);
  
    /** The rollback method is used for recovering the checkpoint. */
    void rollBack(long checkpointId);
  }
  