content: /*
   * 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
   *
   *    https://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.bigtop.manager.server.config;
  
  import org.apache.bigtop.manager.server.holder.SessionUserHolder;
  
  import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
  import org.springframework.aop.interceptor.SimpleAsyncUncaughtExceptionHandler;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.core.task.TaskDecorator;
  import org.springframework.scheduling.annotation.AsyncConfigurer;
  import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
  
  import lombok.extern.slf4j.Slf4j;
  
  import jakarta.annotation.Nonnull;
  import java.util.concurrent.Executor;
  import java.util.concurrent.ThreadPoolExecutor;
  
  @Configuration
  public class AsyncThreadPoolConfig implements AsyncConfigurer {
  
      @Override
      public Executor getAsyncExecutor() {
          ThreadPoolTaskExecutor threadPoolTaskExecutor = new ThreadPoolTaskExecutor();
          threadPoolTaskExecutor.setCorePoolSize(5);
          threadPoolTaskExecutor.setAllowCoreThreadTimeOut(true);
          threadPoolTaskExecutor.setMaxPoolSize(10);
          threadPoolTaskExecutor.setQueueCapacity(300);
          threadPoolTaskExecutor.setTaskDecorator(new ContextCopyingDecorator());
          threadPoolTaskExecutor.setThreadNamePrefix("AsyncTask-");
          threadPoolTaskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
          threadPoolTaskExecutor.initialize();
          return threadPoolTaskExecutor;
      }
  
      @Override
      public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
          return new SimpleAsyncUncaughtExceptionHandler();
      }
  
      @Slf4j
      static class ContextCopyingDecorator implements TaskDecorator {
  
          @Nonnull
          @Override
          public Runnable decorate(@Nonnull Runnable runnable) {
              Long userId = SessionUserHolder.getUserId();
              return () -> {
                  try {
                      SessionUserHolder.setUserId(userId);
                      runnable.run();
                  } finally {
                      SessionUserHolder.clear();
                  }
              };
          }
      }
  }
  