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.coordinator;
  
  import com.alibaba.graphscope.groot.CompletionCallback;
  import com.alibaba.graphscope.groot.common.exception.DdlException;
  import com.alibaba.graphscope.groot.schema.request.DdlRequestBatch;
  import com.alibaba.graphscope.proto.groot.SchemaGrpc;
  import com.alibaba.graphscope.proto.groot.SubmitBatchDdlRequest;
  import com.alibaba.graphscope.proto.groot.SubmitBatchDdlResponse;
  
  import io.grpc.stub.StreamObserver;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class SchemaService extends SchemaGrpc.SchemaImplBase {
      private static final Logger logger = LoggerFactory.getLogger(SchemaService.class);
  
      private final SchemaManager schemaManager;
  
      public SchemaService(SchemaManager schemaManager) {
          this.schemaManager = schemaManager;
      }
  
      @Override
      public void submitBatchDdl(
              SubmitBatchDdlRequest request,
              StreamObserver<SubmitBatchDdlResponse> responseObserver) {
          String requestId = request.getRequestId();
          String sessionId = request.getSessionId();
          DdlRequestBatch ddlRequestBatch = DdlRequestBatch.parseProto(request.getDdlRequests());
          logger.info("submitBatchDdl {}", ddlRequestBatch.toProto());
          this.schemaManager.submitBatchDdl(
                  requestId,
                  sessionId,
                  ddlRequestBatch,
                  new CompletionCallback<Long>() {
                      @Override
                      public void onCompleted(Long res) {
                          responseObserver.onNext(
                                  SubmitBatchDdlResponse.newBuilder()
                                          .setSuccess(true)
                                          .setDdlSnapshotId(res)
                                          .build());
                          responseObserver.onCompleted();
                      }
  
                      @Override
                      public void onError(Throwable t) {
                          if (t instanceof DdlException) {
                              responseObserver.onNext(
                                      SubmitBatchDdlResponse.newBuilder()
                                              .setSuccess(false)
                                              .setMsg(t.getMessage())
                                              .build());
                              responseObserver.onCompleted();
                          } else {
                              responseObserver.onError(t);
                          }
                      }
                  });
      }
  }
  