code: /*
   * SPDX-License-Identifier: Apache-2.0
   * Copyright 2018-2020 The Feast Authors
   *
   * 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
   *
   *     https://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 feast.serving.service.config;
  
  import com.google.inject.AbstractModule;
  import com.google.inject.Provides;
  import feast.serving.connectors.OnlineRetriever;
  import feast.serving.connectors.redis.retriever.*;
  import feast.serving.registry.RegistryRepository;
  import feast.serving.service.OnlineServingServiceV2;
  import feast.serving.service.OnlineTransformationService;
  import feast.serving.service.ServingServiceV2;
  import io.opentracing.Tracer;
  import java.util.Optional;
  import org.slf4j.Logger;
  
  public class ServingServiceV2Module extends AbstractModule {
    private static final Logger log = org.slf4j.LoggerFactory.getLogger(ServingServiceV2Module.class);
  
    @Provides
    public ServingServiceV2 registryBasedServingServiceV2(
        ApplicationProperties applicationProperties,
        RegistryRepository registryRepository,
        Tracer tracer) {
      final ServingServiceV2 servingService;
      final ApplicationProperties.Store store = applicationProperties.getFeast().getActiveStore();
  
      OnlineRetriever retriever;
      // TODO: Support more store types, and potentially use a plugin model here.
      switch (store.getType()) {
        case REDIS_CLUSTER:
          RedisClientAdapter redisClusterClient =
              RedisClusterClient.create(store.getRedisClusterConfig());
          retriever =
              new RedisOnlineRetriever(
                  applicationProperties.getFeast().getProject(),
                  redisClusterClient,
                  new EntityKeySerializerV2(
                      applicationProperties.getFeast().getEntityKeySerializationVersion()));
          break;
        case REDIS:
          RedisClientAdapter redisClient = RedisClient.create(store.getRedisConfig());
          log.info("Created EntityKeySerializerV2");
          retriever =
              new RedisOnlineRetriever(
                  applicationProperties.getFeast().getProject(),
                  redisClient,
                  new EntityKeySerializerV2(
                      applicationProperties.getFeast().getEntityKeySerializationVersion()));
          break;
        default:
          throw new RuntimeException(
              String.format(
                  "Unable to identify online store type: %s for Registry Backed Serving Service",
                  store.getType()));
      }
  
      log.info("Working Directory = " + System.getProperty("user.dir"));
  
      final OnlineTransformationService onlineTransformationService =
          new OnlineTransformationService(
              applicationProperties.getFeast().getTransformationServiceEndpoint(),
              registryRepository);
  
      servingService =
          new OnlineServingServiceV2(
              retriever,
              registryRepository,
              onlineTransformationService,
              applicationProperties.getFeast().getProject(),
              Optional.of(tracer));
  
      return servingService;
    }
  }
  