content: /**
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * <p>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
   *
   * <p>http://www.apache.org/licenses/LICENSE-2.0
   *
   * <p>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 com.alibaba.graphscope.groot.frontend;
  
  import com.alibaba.graphscope.groot.frontend.write.IngestCallback;
  import com.alibaba.graphscope.groot.frontend.write.KafkaAppender;
  import com.alibaba.graphscope.groot.operation.OperationBatch;
  import com.alibaba.graphscope.proto.groot.*;
  
  import io.grpc.stub.StreamObserver;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class IngestorWriteService extends IngestorWriteGrpc.IngestorWriteImplBase {
      private static final Logger logger = LoggerFactory.getLogger(KafkaAppender.class);
  
      private final KafkaAppender kafkaAppender;
  
      public IngestorWriteService(KafkaAppender kafkaAppender) {
          this.kafkaAppender = kafkaAppender;
      }
  
      @Override
      public void writeIngestor(
              WriteIngestorRequest request, StreamObserver<WriteIngestorResponse> responseObserver) {
          try {
              String requestId = request.getRequestId();
              OperationBatch operationBatch = OperationBatch.parseProto(request.getOperationBatch());
              this.kafkaAppender.ingestBatch(
                      requestId,
                      operationBatch,
                      new IngestCallback() {
                          @Override
                          public void onSuccess(long snapshotId) {
                              WriteIngestorResponse response =
                                      WriteIngestorResponse.newBuilder()
                                              .setSnapshotId(snapshotId)
                                              .build();
                              responseObserver.onNext(response);
                              responseObserver.onCompleted();
                          }
  
                          @Override
                          public void onFailure(Exception e) {
                              responseObserver.onError(e);
                          }
                      });
          } catch (Exception e) {
              responseObserver.onError(e);
          }
      }
  }
  