content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      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 com.alibaba.nacos.core.distributed.distro.task.execute;
  
  import com.alibaba.nacos.consistency.DataOperation;
  import com.alibaba.nacos.core.distributed.distro.component.DistroCallback;
  import com.alibaba.nacos.core.distributed.distro.component.DistroComponentHolder;
  import com.alibaba.nacos.core.distributed.distro.entity.DistroData;
  import com.alibaba.nacos.core.distributed.distro.entity.DistroKey;
  import com.alibaba.nacos.core.utils.Loggers;
  
  /**
   * Distro sync change task.
   *
   * @author xiweng.yy
   */
  public class DistroSyncChangeTask extends AbstractDistroExecuteTask {
      
      private static final DataOperation OPERATION = DataOperation.CHANGE;
      
      public DistroSyncChangeTask(DistroKey distroKey, DistroComponentHolder distroComponentHolder) {
          super(distroKey, distroComponentHolder);
      }
      
      @Override
      protected DataOperation getDataOperation() {
          return OPERATION;
      }
      
      @Override
      protected boolean doExecute() {
          String type = getDistroKey().getResourceType();
          DistroData distroData = getDistroData(type);
          if (null == distroData) {
              Loggers.DISTRO.warn("[DISTRO] {} with null data to sync, skip", toString());
              return true;
          }
          return getDistroComponentHolder().findTransportAgent(type)
                  .syncData(distroData, getDistroKey().getTargetServer());
      }
      
      @Override
      protected void doExecuteWithCallback(DistroCallback callback) {
          String type = getDistroKey().getResourceType();
          DistroData distroData = getDistroData(type);
          if (null == distroData) {
              Loggers.DISTRO.warn("[DISTRO] {} with null data to sync, skip", toString());
              return;
          }
          getDistroComponentHolder().findTransportAgent(type)
                  .syncData(distroData, getDistroKey().getTargetServer(), callback);
      }
      
      @Override
      public String toString() {
          return "DistroSyncChangeTask for " + getDistroKey().toString();
      }
      
      private DistroData getDistroData(String type) {
          DistroData result = getDistroComponentHolder().findDataStorage(type).getDistroData(getDistroKey());
          if (null != result) {
              result.setType(OPERATION);
          }
          return result;
      }
  }
  