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.sessiondict.server;
  
  import com.google.common.util.concurrent.MoreExecutors;
  import io.micrometer.core.instrument.Metrics;
  import io.micrometer.core.instrument.binder.jvm.ExecutorServiceMetrics;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.LinkedTransferQueue;
  import java.util.concurrent.ThreadPoolExecutor;
  import java.util.concurrent.TimeUnit;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bifromq.baseenv.EnvProvider;
  import org.apache.bifromq.sessiondict.RPCBluePrint;
  
  @Slf4j
  class SessionDictServer implements ISessionDictServer {
      private final SessionDictService service;
      private final ExecutorService rpcExecutor;
  
  
      SessionDictServer(SessionDictServerBuilder builder) {
          service = new SessionDictService(builder.mqttBrokerClient);
          if (builder.workerThreads == 0) {
              rpcExecutor = MoreExecutors.newDirectExecutorService();
          } else {
              rpcExecutor = ExecutorServiceMetrics.monitor(Metrics.globalRegistry,
                  new ThreadPoolExecutor(builder.workerThreads,
                      builder.workerThreads, 0L,
                      TimeUnit.MILLISECONDS, new LinkedTransferQueue<>(),
                      EnvProvider.INSTANCE.newThreadFactory("dist-server-executor")), "dist-server-executor");
          }
          builder.rpcServerBuilder.bindService(service.bindService(),
              RPCBluePrint.INSTANCE,
              builder.attributes,
              builder.defaultGroupTags,
              rpcExecutor);
      }
  
      @Override
      public void close() {
          log.debug("Closing session dict service");
          MoreExecutors.shutdownAndAwaitTermination(rpcExecutor, 5, TimeUnit.SECONDS);
          service.close();
      }
  }