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.inbox.server;
  
  import org.apache.bifromq.baseenv.EnvProvider;
  import org.apache.bifromq.inbox.RPCBluePrint;
  import org.apache.bifromq.inbox.server.scheduler.InboxAttachScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxCheckSubScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxCommitScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxDeleteScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxDetachScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxExistScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxFetchScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxInsertScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxSendLWTScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxSubScheduler;
  import org.apache.bifromq.inbox.server.scheduler.InboxUnSubScheduler;
  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.SneakyThrows;
  import lombok.extern.slf4j.Slf4j;
  
  @Slf4j
  class InboxServer implements IInboxServer {
      private final InboxService inboxService;
      private final ExecutorService rpcExecutor;
  
      InboxServer(InboxServerBuilder builder) {
          this.inboxService = InboxService.builder()
              .inboxClient(builder.inboxClient)
              .distClient(builder.distClient)
              .getScheduler(new InboxExistScheduler(builder.inboxStoreClient))
              .sendLWTScheduler(new InboxSendLWTScheduler(builder.inboxStoreClient))
              .checkSubScheduler(new InboxCheckSubScheduler(builder.inboxStoreClient))
              .fetchScheduler(new InboxFetchScheduler(builder.inboxStoreClient))
              .insertScheduler(new InboxInsertScheduler(builder.inboxStoreClient))
              .commitScheduler(new InboxCommitScheduler(builder.inboxStoreClient))
              .attachScheduler(new InboxAttachScheduler(builder.inboxStoreClient))
              .detachScheduler(new InboxDetachScheduler(builder.inboxStoreClient))
              .deleteScheduler(new InboxDeleteScheduler(builder.inboxStoreClient))
              .subScheduler(new InboxSubScheduler(builder.inboxStoreClient))
              .unsubScheduler(new InboxUnSubScheduler(builder.inboxStoreClient))
              .tenantGCRunner(new TenantGCRunner(builder.inboxStoreClient))
              .build();
          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("inbox-server-executor")), "inbox-server-executor");
          }
          builder.rpcServerBuilder.bindService(inboxService.bindService(),
              RPCBluePrint.INSTANCE,
              builder.attributes,
              builder.defaultGroupTags,
              rpcExecutor);
          start();
      }
  
      private void start() {
          log.debug("Starting inbox service");
          inboxService.start();
      }
  
      @SneakyThrows
      @Override
      public void close() {
          log.info("Stopping InboxService");
          inboxService.stop();
          MoreExecutors.shutdownAndAwaitTermination(rpcExecutor, 5, TimeUnit.SECONDS);
          log.info("InboxService stopped");
      }
  }
  