code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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
   *
   *     http://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 org.apache.skywalking.oap.server.configuration.grpc;
  
  import io.grpc.stub.StreamObserver;
  import java.util.UUID;
  import java.util.concurrent.atomic.AtomicInteger;
  import org.apache.skywalking.oap.server.configuration.service.Config;
  import org.apache.skywalking.oap.server.configuration.service.ConfigurationRequest;
  import org.apache.skywalking.oap.server.configuration.service.ConfigurationResponse;
  import org.apache.skywalking.oap.server.configuration.service.ConfigurationServiceGrpc;
  import org.apache.skywalking.oap.server.configuration.service.GroupConfigItems;
  import org.apache.skywalking.oap.server.configuration.service.GroupConfigurationResponse;
  
  public class MockGRPCConfigService extends ConfigurationServiceGrpc.ConfigurationServiceImplBase {
      private final AtomicInteger dataFlag;
  
      /**
       * @param dataFlag 0:init, 1:change, 2:no change, 3:delete
       */
      public MockGRPCConfigService(AtomicInteger dataFlag) {
          this.dataFlag = dataFlag;
      }
  
      @Override
      public void call(ConfigurationRequest request,
                       StreamObserver<ConfigurationResponse> responseObserver) {
          ConfigurationResponse response;
          String uuid = request.getUuid();
          switch (this.dataFlag.get()) {
              case 1:
                  response = ConfigurationResponse
                      .newBuilder().setUuid(UUID.randomUUID().toString())
                      .addConfigTable(Config
                                          .newBuilder()
                                          .setName("test-module.grpc.testKey")
                                          .setValue("300")
                                          .build()).build();
                  responseObserver.onNext(response);
                  break;
              case 2:
                  response = ConfigurationResponse.newBuilder().setUuid(uuid).build();
                  responseObserver.onNext(response);
                  break;
              case 3:
                  response = ConfigurationResponse
                      .newBuilder().setUuid(UUID.randomUUID().toString())
                      .addConfigTable(Config
                                          .newBuilder()
                                          .setName("test-module.grpc.testKey")
                                          .build()).build();
                  responseObserver.onNext(response);
                  break;
              default:
                  response = ConfigurationResponse
                      .newBuilder().setUuid(UUID.randomUUID().toString())
                      .addConfigTable(Config
                                          .newBuilder()
                                          .setName("test-module.grpc.testKey")
                                          .setValue("100")
                                          .build()).build();
                  responseObserver.onNext(response);
          }
          responseObserver.onCompleted();
      }
  
      @Override
      public void callGroup(ConfigurationRequest request,
                            StreamObserver<GroupConfigurationResponse> responseObserver) {
          GroupConfigurationResponse response;
          String uuid = request.getUuid();
          switch (this.dataFlag.get()) {
              case 1:
                  response = GroupConfigurationResponse
                      .newBuilder().setUuid(UUID.randomUUID().toString())
                      .addGroupConfigTable(GroupConfigItems
                                               .newBuilder().setGroupName("test-module.grpc.testKeyGroup")
                                               .addItems(Config
                                                             .newBuilder()
                                                             .setName("item1")
                                                             .setValue("100")
                                                             .build())
                                               .addItems(Config
                                                             .newBuilder()
                                                             .setName("item2")
                                                             .setValue("2000")
                                                             .build()).build()).build();
                  responseObserver.onNext(response);
                  break;
              case 2:
                  response = GroupConfigurationResponse.newBuilder().setUuid(uuid).build();
                  responseObserver.onNext(response);
                  break;
              case 3:
                  response = GroupConfigurationResponse
                      .newBuilder().setUuid(UUID.randomUUID().toString())
                      .addGroupConfigTable(GroupConfigItems
                                               .newBuilder().setGroupName("test-module.grpc.testKeyGroup")
                                               .addItems(Config
                                                             .newBuilder()
                                                             .setName("item2")
                                                             .setValue("2000")
                                                             .build()).build()).build();
                  responseObserver.onNext(response);
                  break;
              default:
                  response = GroupConfigurationResponse
                      .newBuilder().setUuid(UUID.randomUUID().toString())
                      .addGroupConfigTable(GroupConfigItems
                                               .newBuilder().setGroupName("test-module.grpc.testKeyGroup")
                                               .addItems(Config
                                                             .newBuilder()
                                                             .setName("item1")
                                                             .setValue("100")
                                                             .build())
                                               .addItems(Config
                                                             .newBuilder()
                                                             .setName("item2")
                                                             .setValue("200")
                                                             .build()).build()).build();
                  responseObserver.onNext(response);
          }
          responseObserver.onCompleted();
      }
  }
  