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.bifromq.basekv;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  public class InProcStores {
      private static final Map<String, Set<String>> IN_PROC_STORES = new ConcurrentHashMap<>();
  
      public static void regInProcStore(String clusterId, String storeId) {
          IN_PROC_STORES.compute(clusterId, (k, v) -> {
              if (v == null) {
                  v = new HashSet<>();
              }
              v.add(storeId);
              return v;
          });
      }
  
      public static Set<String> getInProcStores(String clusterId) {
          return IN_PROC_STORES.getOrDefault(clusterId, Collections.emptySet());
      }
  }
  