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.samza.util;
  
  import java.util.Set;
  
  /**
   * This class encapsulates the logic to generate unique store id. For unique state ids across the
   * Beam pipeline, store id is the same as the state id. For non-unique state ids, join the state id
   * with an escaped transform name to generate a unique store id.
   */
  public class StoreIdGenerator {
  
    private final Set<String> nonUniqueStateIds;
  
    public StoreIdGenerator(Set<String> nonUniqueStateId) {
      this.nonUniqueStateIds = nonUniqueStateId;
    }
  
    public String getId(String stateId, String transformFullName) {
      String storeId = stateId;
      if (nonUniqueStateIds.contains(stateId)) {
        final String escapedName = SamzaPipelineTranslatorUtils.escape(transformFullName);
        storeId = toUniqueStoreId(stateId, escapedName);
      }
      return storeId;
    }
  
    /** Join state id and escaped PTransform name to uniquify store id. */
    private static String toUniqueStoreId(String stateId, String escapedPTransformName) {
      return String.join("-", stateId, escapedPTransformName);
    }
  }
  