statefun-flink/statefun-flink-core/src/main/java/org/apache/flink/statefun/flink/core/logger/CheckpointedStreamOperations.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 org.apache.flink.statefun.flink.core.logger;

import java.io.Closeable;
import java.io.IOException;
import java.io.OutputStream;

public interface CheckpointedStreamOperations {

  void requireKeyedStateCheckpointed(OutputStream keyedStateCheckpointOutputStream);

  Iterable<Integer> keyGroupList(OutputStream stream);

  void startNewKeyGroup(OutputStream stream, int keyGroup) throws IOException;

  Closeable acquireLease(OutputStream keyedStateCheckpointOutputStream);
}