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.common.exception.DdlException;
  import com.alibaba.graphscope.groot.rpc.RpcChannel;
  import com.alibaba.graphscope.groot.rpc.RpcClient;
  import com.alibaba.graphscope.proto.groot.DdlRequestBatchPb;
  import com.alibaba.graphscope.proto.groot.SchemaGrpc;
  import com.alibaba.graphscope.proto.groot.SubmitBatchDdlRequest;
  import com.alibaba.graphscope.proto.groot.SubmitBatchDdlResponse;
  
  import io.grpc.ManagedChannel;
  
  public class SchemaClient extends RpcClient {
      public SchemaClient(RpcChannel channel) {
          super(channel);
      }
  
      public SchemaClient(SchemaGrpc.SchemaBlockingStub stub) {
          super((ManagedChannel) stub.getChannel());
      }
  
      private SchemaGrpc.SchemaBlockingStub getStub() {
          return SchemaGrpc.newBlockingStub(rpcChannel.getChannel());
      }
  
      public long submitBatchDdl(
              String requestId, String sessionId, DdlRequestBatchPb ddlRequestBatchPb) {
          SubmitBatchDdlRequest request =
                  SubmitBatchDdlRequest.newBuilder()
                          .setRequestId(requestId)
                          .setSessionId(sessionId)
                          .setDdlRequests(ddlRequestBatchPb)
                          .build();
          SubmitBatchDdlResponse submitBatchDdlResponse = getStub().submitBatchDdl(request);
          if (submitBatchDdlResponse.getSuccess()) {
              return submitBatchDdlResponse.getDdlSnapshotId();
          } else {
              throw new DdlException(submitBatchDdlResponse.getMsg());
          }
      }
  }
  