content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.file;
  
  import alluxio.RpcUtils;
  import alluxio.grpc.FileSystemHeartbeatPOptions;
  import alluxio.grpc.FileSystemHeartbeatPRequest;
  import alluxio.grpc.FileSystemHeartbeatPResponse;
  import alluxio.grpc.FileSystemMasterWorkerServiceGrpc;
  import alluxio.grpc.GetFileInfoPOptions;
  import alluxio.grpc.GetFileInfoPRequest;
  import alluxio.grpc.GetFileInfoPResponse;
  import alluxio.grpc.GetPinnedFileIdsPOptions;
  import alluxio.grpc.GetPinnedFileIdsPRequest;
  import alluxio.grpc.GetPinnedFileIdsPResponse;
  import alluxio.grpc.GetUfsInfoPOptions;
  import alluxio.grpc.GetUfsInfoPRequest;
  import alluxio.grpc.GetUfsInfoPResponse;
  import alluxio.grpc.GrpcUtils;
  import alluxio.master.file.contexts.WorkerHeartbeatContext;
  
  import com.google.common.base.Preconditions;
  import io.grpc.stub.StreamObserver;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.List;
  
  /**
   * This class is a gRPC handler for file system master RPCs invoked by an Alluxio worker.
   */
  public final class FileSystemMasterWorkerServiceHandler
      extends FileSystemMasterWorkerServiceGrpc.FileSystemMasterWorkerServiceImplBase {
    private static final Logger LOG =
        LoggerFactory.getLogger(FileSystemMasterWorkerServiceHandler.class);
  
    private final FileSystemMaster mFileSystemMaster;
  
    /**
     * Creates a new instance of {@link FileSystemMasterWorkerServiceHandler}.
     *
     * @param fileSystemMaster the {@link FileSystemMaster} the handler uses internally
     */
    public FileSystemMasterWorkerServiceHandler(FileSystemMaster fileSystemMaster) {
      Preconditions.checkNotNull(fileSystemMaster, "fileSystemMaster");
      mFileSystemMaster = fileSystemMaster;
    }
  
    @Override
    public void fileSystemHeartbeat(FileSystemHeartbeatPRequest request,
        StreamObserver<FileSystemHeartbeatPResponse> responseObserver) {
  
      final long workerId = request.getWorkerId();
      final List<Long> persistedFiles = request.getPersistedFilesList();
      FileSystemHeartbeatPOptions options = request.getOptions();
  
      RpcUtils.call(LOG,
              () -> FileSystemHeartbeatPResponse
                  .newBuilder()
                  .setCommand(GrpcUtils.toProto(mFileSystemMaster.workerHeartbeat(workerId,
                      persistedFiles, WorkerHeartbeatContext.create(options.toBuilder()))))
                  .build(),
          "workerHeartbeat", "workerId=%s, persistedFiles=%s, options=%s", responseObserver, workerId,
          persistedFiles, options);
    }
  
    @Override
    public void getFileInfo(GetFileInfoPRequest request,
        StreamObserver<GetFileInfoPResponse> responseObserver) {
  
      final long fileId = request.getFileId();
      GetFileInfoPOptions options = request.getOptions();
  
      RpcUtils.call(LOG,
              () -> GetFileInfoPResponse
                  .newBuilder().setFileInfo(GrpcUtils.toProto(mFileSystemMaster.getFileInfo(fileId)))
                  .build(),
          "getFileInfo", "fileId=%s, options=%s", responseObserver, fileId, options);
    }
  
    @Override
    public void getPinnedFileIds(GetPinnedFileIdsPRequest request,
        StreamObserver<GetPinnedFileIdsPResponse> responseObserver) {
  
      GetPinnedFileIdsPOptions options = request.getOptions();
  
      RpcUtils.call(LOG,
              () -> GetPinnedFileIdsPResponse
                  .newBuilder().addAllPinnedFileIds(mFileSystemMaster.getPinIdList()).build(),
          "getPinnedFileIds", "options=%s", responseObserver, options);
    }
  
    @Override
    public void getUfsInfo(GetUfsInfoPRequest request,
        StreamObserver<GetUfsInfoPResponse> responseObserver) {
  
      final long mountId = request.getMountId();
      GetUfsInfoPOptions options = request.getOptions();
  
      RpcUtils.call(LOG,
              () -> GetUfsInfoPResponse
                  .newBuilder().setUfsInfo(GrpcUtils.toProto(mFileSystemMaster.getUfsInfo(mountId)))
                  .build(),
          "getUfsInfo", "mountId=%s, options=%s", responseObserver, mountId, options);
    }
  }
  