content: /*
   * Copyright 1999-2023 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.listener.startup;
  
  import com.alibaba.nacos.common.executor.ExecutorFactory;
  import com.alibaba.nacos.common.executor.NameThreadFactory;
  import org.slf4j.Logger;
  import org.springframework.context.ConfigurableApplicationContext;
  
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Abstract Nacos start up.
   *
   * @author xiweng.yy
   */
  public abstract class AbstractNacosStartUp implements NacosStartUp {
      
      private final String phase;
      
      private volatile ScheduledExecutorService startLoggingScheduledExecutor;
      
      private volatile boolean starting;
      
      private volatile long startTimestamp;
      
      protected AbstractNacosStartUp(String phase) {
          this.phase = phase;
      }
      
      @Override
      public String startUpPhase() {
          return phase;
      }
      
      @Override
      public void starting() {
          starting = true;
          startTimestamp = System.currentTimeMillis();
          this.startLoggingScheduledExecutor = ExecutorFactory.newSingleScheduledExecutorService(
                  new NameThreadFactory(String.format("com.alibaba.nacos.%s.nacos-starting", phase)));
      }
      
      @Override
      public void logStartingInfo(Logger logger) {
          startLoggingScheduledExecutor.scheduleWithFixedDelay(() -> {
              if (starting) {
                  logger.info(String.format("%s is starting...", getPhaseNameInStartingInfo()));
              }
          }, 1, 1, TimeUnit.SECONDS);
      }
      
      @Override
      public void started() {
          starting = false;
          closeExecutor();
      }
      
      @Override
      public void failed(Throwable exception, ConfigurableApplicationContext context) {
          starting = false;
          closeExecutor();
          context.close();
      }
      
      protected long getStartTimestamp() {
          return startTimestamp;
      }
      
      /**
       * Get phase name in starting info.
       *
       * @return phase name
       */
      protected abstract String getPhaseNameInStartingInfo();
      
      private void closeExecutor() {
          startLoggingScheduledExecutor.shutdownNow();
      }
  }
  