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.raft.utils;
  
  import com.alibaba.nacos.consistency.entity.Response;
  import com.alibaba.nacos.consistency.exception.ConsistencyException;
  import com.alipay.sofa.jraft.Status;
  
  import java.util.Objects;
  import java.util.concurrent.CompletableFuture;
  
  /**
   * Closure with internal retry mechanism.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  public class FailoverClosureImpl implements FailoverClosure {
      
      private final CompletableFuture<Response> future;
      
      private volatile Response data;
      
      private volatile Throwable throwable;
      
      public FailoverClosureImpl(final CompletableFuture<Response> future) {
          this.future = future;
      }
      
      @Override
      public void setResponse(Response data) {
          this.data = data;
      }
      
      @Override
      public void setThrowable(Throwable throwable) {
          this.throwable = throwable;
      }
      
      @Override
      public void run(Status status) {
          if (status.isOk()) {
              future.complete(data);
              return;
          }
          final Throwable throwable = this.throwable;
          future.completeExceptionally(Objects.nonNull(throwable) ? new ConsistencyException(throwable.getMessage())
                  : new ConsistencyException("operation failure"));
      }
      
  }
  