/*
    * 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.shardingsphere.infra.instance;
  
  import lombok.Getter;
  import lombok.RequiredArgsConstructor;
  import lombok.Setter;
  import org.apache.shardingsphere.infra.instance.metadata.InstanceMetaData;
  import org.apache.shardingsphere.infra.state.instance.InstanceState;
  import org.apache.shardingsphere.infra.state.instance.InstanceStateContext;
  
  import com.google.errorprone.annotations.ThreadSafe;
  import java.util.Collection;
  import java.util.concurrent.CopyOnWriteArrayList;
  
  /**
   * Instance of compute node.
   */
  @RequiredArgsConstructor
  @Getter
  @ThreadSafe
  public final class ComputeNodeInstance {
      
      private final InstanceMetaData metaData;
      
      private final InstanceStateContext state = new InstanceStateContext();
      
      private final Collection<String> labels = new CopyOnWriteArrayList<>();
      
      @Setter
      private volatile int workerId = -1;
      
      public ComputeNodeInstance(final InstanceMetaData metaData, final Collection<String> labels) {
          this.metaData = metaData;
          this.labels.addAll(labels);
      }
      
      /**
       * Switch state.
       *
       * @param state instance state
       */
      public void switchState(final InstanceState state) {
          if (InstanceState.CIRCUIT_BREAK == state) {
              this.state.switchState(state);
          } else {
              this.state.recoverState(InstanceState.CIRCUIT_BREAK);
          }
      }
  }