code: /*
   * SPDX-License-Identifier: Apache-2.0
   * Copyright 2018-2021 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.amazonaws.services.s3.AmazonS3;
  import com.amazonaws.services.s3.AmazonS3ClientBuilder;
  import com.google.cloud.storage.Storage;
  import com.google.cloud.storage.StorageOptions;
  import com.google.inject.AbstractModule;
  import com.google.inject.Provider;
  import com.google.inject.Provides;
  import feast.serving.registry.*;
  import java.net.URI;
  import java.util.Optional;
  
  public class RegistryConfigModule extends AbstractModule {
    @Provides
    Storage googleStorage(ApplicationProperties applicationProperties) {
      return StorageOptions.newBuilder()
          .setProjectId(applicationProperties.getFeast().getGcpProject())
          .build()
          .getService();
    }
  
    @Provides
    public AmazonS3 awsStorage(ApplicationProperties applicationProperties) {
      return AmazonS3ClientBuilder.standard()
          .withRegion(applicationProperties.getFeast().getAwsRegion())
          .build();
    }
  
    @Provides
    RegistryFile registryFile(
        ApplicationProperties applicationProperties,
        Provider<Storage> storageProvider,
        Provider<AmazonS3> amazonS3Provider) {
  
      String registryPath = applicationProperties.getFeast().getRegistry();
      Optional<String> scheme = Optional.ofNullable(URI.create(registryPath).getScheme());
  
      switch (scheme.orElse("")) {
        case "gs":
          return new GSRegistryFile(storageProvider.get(), registryPath);
        case "s3":
          return new S3RegistryFile(amazonS3Provider.get(), registryPath);
        case "":
        case "file":
          return new LocalRegistryFile(registryPath);
        default:
          throw new RuntimeException(
              String.format("Registry storage %s is unsupported", scheme.get()));
      }
    }
  
    @Provides
    RegistryRepository registryRepository(
        RegistryFile registryFile, ApplicationProperties applicationProperties) {
      return new RegistryRepository(
          registryFile, applicationProperties.getFeast().getRegistryRefreshInterval());
    }
  }
  