io.ray.streaming.state.backend.OperatorStateBackend Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of streaming-state Show documentation
ray streaming state
There is a newer version: 1.10.0
/*
 * 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.backend;

import io.ray.streaming.state.keystate.desc.ListStateDescriptor;
import io.ray.streaming.state.keystate.state.ListState;
import io.ray.streaming.state.keystate.state.impl.OperatorStateImpl;
import io.ray.streaming.state.keystate.state.proxy.ListStateStoreManagerProxy;

/**
 * OperatorState manager for getting split or union list state.
 */
public class OperatorStateBackend extends AbstractKeyStateBackend {

  public OperatorStateBackend(AbstractStateBackend backend) {
    super(backend);
  }

  @Override
  public void setCurrentKey(Object currentKey) {
    super.currentKey = currentKey;
  }

  protected  ListStateStoreManagerProxy newListStateStoreManagerProxy(
      ListStateDescriptor stateDescriptor) {
    return new ListStateStoreManagerProxy<>(this, stateDescriptor);
  }

  /**
   * get spitted List for different operator instance.
   */
  public  ListState getSplitListState(ListStateDescriptor stateDescriptor) {
    String desc = stateDescriptor.getIdentify();
    if (listManagerProxyHashMap.containsKey(desc)) {
      ListStateStoreManagerProxy listStateProxy = listManagerProxyHashMap.get(desc);
      return listStateProxy.getListState();
    } else {
      ListStateStoreManagerProxy listStateProxy = newListStateStoreManagerProxy(stateDescriptor);
      listManagerProxyHashMap.put(desc, listStateProxy);
      ((OperatorStateImpl) (listStateProxy.getListState())).setSplit(true);
      return listStateProxy.getListState();
    }
  }

  /**
   * get a union List for different operator instance.
   */
  public  ListState getUnionListState(ListStateDescriptor stateDescriptor) {
    String desc = stateDescriptor.getIdentify();
    if (listManagerProxyHashMap.containsKey(desc)) {
      ListStateStoreManagerProxy listStateProxy = listManagerProxyHashMap.get(desc);
      return listStateProxy.getListState();
    } else {
      ListStateStoreManagerProxy listStateProxy = newListStateStoreManagerProxy(stateDescriptor);
      listManagerProxyHashMap.put(desc, listStateProxy);
      ((OperatorStateImpl) (listStateProxy.getListState())).init();
      return listStateProxy.getListState();
    }
  }
}