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.localengine.memory;
  
  import org.apache.bifromq.basekv.localengine.AbstractKVEngine;
  import java.util.UUID;
  
  abstract class InMemKVEngine<E extends InMemKVEngine<E, T>, T extends InMemKVSpace<E, T>>
      extends AbstractKVEngine<T, InMemKVEngineConfigurator> {
      private final String identity;
  
      public InMemKVEngine(String overrideIdentity, InMemKVEngineConfigurator c) {
          super(overrideIdentity, c);
          if (overrideIdentity != null && !overrideIdentity.trim().isEmpty()) {
              identity = overrideIdentity;
          } else {
              identity = UUID.randomUUID().toString();
          }
      }
  
      @Override
      protected void doStart(String... metricTags) {
  
      }
  
      @Override
      protected void doStop() {
  
      }
  
      @Override
      public String id() {
          return identity;
      }
  }
  