content: /*
   * Licensed 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.bookkeeper.stream.server.grpc;
  
  import com.google.common.annotations.VisibleForTesting;
  import io.grpc.HandlerRegistry;
  import io.grpc.Server;
  import io.grpc.ServerBuilder;
  import io.grpc.ServerInterceptors;
  import io.grpc.ServerServiceDefinition;
  import io.grpc.inprocess.InProcessServerBuilder;
  import java.io.IOException;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bookkeeper.common.component.AbstractLifecycleComponent;
  import org.apache.bookkeeper.common.grpc.proxy.ProxyHandlerRegistry;
  import org.apache.bookkeeper.common.grpc.stats.MonitoringServerInterceptor;
  import org.apache.bookkeeper.stats.StatsLogger;
  import org.apache.bookkeeper.stream.proto.common.Endpoint;
  import org.apache.bookkeeper.stream.server.conf.StorageServerConfiguration;
  import org.apache.bookkeeper.stream.server.exceptions.StorageServerRuntimeException;
  import org.apache.bookkeeper.stream.storage.api.StorageContainerStore;
  import org.apache.bookkeeper.stream.storage.impl.grpc.GrpcServices;
  
  /**
   * KeyRange Server.
   */
  @Slf4j
  public class GrpcServer extends AbstractLifecycleComponent<StorageServerConfiguration> {
  
      public static GrpcServer build(GrpcServerSpec spec) {
          return new GrpcServer(
              spec.storeSupplier().get(),
              spec.storeServerConf(),
              spec.endpoint(),
              spec.localServerName(),
              spec.localHandlerRegistry(),
              spec.statsLogger());
      }
  
      private final Endpoint myEndpoint;
      private final Server grpcServer;
  
      public GrpcServer(StorageContainerStore storageContainerStore,
                        StorageServerConfiguration conf,
                        Endpoint myEndpoint,
                        StatsLogger statsLogger) {
          this(storageContainerStore, conf, myEndpoint, null, null, statsLogger);
      }
  
      @VisibleForTesting
      public GrpcServer(StorageContainerStore storageContainerStore,
                        StorageServerConfiguration conf,
                        Endpoint myEndpoint,
                        String localServerName,
                        HandlerRegistry localHandlerRegistry,
                        StatsLogger statsLogger) {
          super("range-grpc-server", conf, statsLogger);
          this.myEndpoint = myEndpoint;
          if (null != localServerName) {
              InProcessServerBuilder serverBuilder = InProcessServerBuilder
                  .forName(localServerName)
                  .directExecutor();
              if (null != localHandlerRegistry) {
                  serverBuilder = serverBuilder.fallbackHandlerRegistry(localHandlerRegistry);
              }
              this.grpcServer = serverBuilder.build();
          } else {
              MonitoringServerInterceptor monitoringInterceptor =
                  MonitoringServerInterceptor.create(statsLogger.scope("services"), true);
              ProxyHandlerRegistry.Builder proxyRegistryBuilder = ProxyHandlerRegistry.newBuilder()
                  .setChannelFinder(storageContainerStore);
              for (ServerServiceDefinition definition : GrpcServices.create(null)) {
                  ServerServiceDefinition monitoredService = ServerInterceptors.intercept(
                      definition,
                      monitoringInterceptor
                  );
                  proxyRegistryBuilder = proxyRegistryBuilder.addService(monitoredService);
              }
              ServerServiceDefinition locationService = ServerInterceptors.intercept(
                  new GrpcStorageContainerService(storageContainerStore),
                  monitoringInterceptor
              );
              this.grpcServer = ServerBuilder.forPort(this.myEndpoint.getPort())
                  .addService(locationService)
                  .fallbackHandlerRegistry(proxyRegistryBuilder.build())
                  .build();
          }
      }
  
      @VisibleForTesting
      Server getGrpcServer() {
          return grpcServer;
      }
  
      @Override
      protected void doStart() {
          try {
              grpcServer.start();
          } catch (IOException e) {
              log.error("Failed to start grpc server", e);
              throw new StorageServerRuntimeException("Failed to start grpc server", e);
          }
      }
  
      @Override
      protected void doStop() {
          grpcServer.shutdown();
      }
  
      @Override
      protected void doClose() throws IOException {
      }
  
  }
  