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 org.apache.kafka.streams.processor.internals;
  
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.streams.errors.StreamsException;
  import org.apache.kafka.streams.processor.CommitCallback;
  import org.apache.kafka.streams.processor.StateRestoreCallback;
  import org.apache.kafka.streams.processor.StateStore;
  import org.apache.kafka.streams.processor.internals.Task.TaskType;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Map;
  
  public interface StateManager {
      File baseDir();
  
      /**
       * @throws IllegalArgumentException if the store name has already been registered or if it is not a valid name
       * (e.g., when it conflicts with the names of internal topics, like the checkpoint file name)
       * @throws StreamsException if the store's change log does not contain the partition
       */
      void registerStore(final StateStore store,
                         final StateRestoreCallback stateRestoreCallback,
                         final CommitCallback checkpoint);
  
      StateStore store(final String name);
  
      void flush();
  
      void updateChangelogOffsets(final Map<TopicPartition, Long> writtenOffsets);
  
      void checkpoint();
  
      Map<TopicPartition, Long> changelogOffsets();
  
      void close() throws IOException;
  
      TaskType taskType();
  
      String changelogFor(final String storeName);
  
      // TODO: we can remove this when consolidating global state manager into processor state manager
      StateStore globalStore(final String name);
  }
  