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.beam.runners.flink.streaming;
  
  import java.util.Collection;
  import org.apache.flink.api.common.JobID;
  import org.apache.flink.api.common.typeutils.TypeSerializer;
  import org.apache.flink.core.fs.CloseableRegistry;
  import org.apache.flink.metrics.MetricGroup;
  import org.apache.flink.runtime.execution.Environment;
  import org.apache.flink.runtime.query.TaskKvStateRegistry;
  import org.apache.flink.runtime.state.AbstractKeyedStateBackend;
  import org.apache.flink.runtime.state.BackendBuildingException;
  import org.apache.flink.runtime.state.KeyGroupRange;
  import org.apache.flink.runtime.state.KeyedStateHandle;
  import org.apache.flink.runtime.state.OperatorStateBackend;
  import org.apache.flink.runtime.state.OperatorStateHandle;
  import org.apache.flink.runtime.state.memory.MemoryStateBackend;
  import org.apache.flink.runtime.state.ttl.TtlTimeProvider;
  
  class MemoryStateBackendWrapper {
    static <K> AbstractKeyedStateBackend<K> createKeyedStateBackend(
        Environment env,
        JobID jobID,
        String operatorIdentifier,
        TypeSerializer<K> keySerializer,
        int numberOfKeyGroups,
        KeyGroupRange keyGroupRange,
        TaskKvStateRegistry kvStateRegistry,
        TtlTimeProvider ttlTimeProvider,
        MetricGroup metricGroup,
        Collection<KeyedStateHandle> stateHandles,
        CloseableRegistry cancelStreamRegistry)
        throws BackendBuildingException {
  
      MemoryStateBackend backend = new MemoryStateBackend();
      return backend.createKeyedStateBackend(
          env,
          jobID,
          operatorIdentifier,
          keySerializer,
          numberOfKeyGroups,
          keyGroupRange,
          kvStateRegistry,
          ttlTimeProvider,
          metricGroup,
          stateHandles,
          cancelStreamRegistry);
    }
  
    static OperatorStateBackend createOperatorStateBackend(
        Environment env,
        String operatorIdentifier,
        Collection<OperatorStateHandle> stateHandles,
        CloseableRegistry cancelStreamRegistry)
        throws Exception {
      MemoryStateBackend backend = new MemoryStateBackend();
      return backend.createOperatorStateBackend(
          env, operatorIdentifier, stateHandles, cancelStreamRegistry);
    }
  }
  