code: /*
   * 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.skywalking.oap.server.library.server.pool;
  
  import java.util.concurrent.ThreadFactory;
  import java.util.concurrent.atomic.AtomicInteger;
  
  public class CustomThreadFactory implements ThreadFactory {
      private final AtomicInteger poolNumber = new AtomicInteger(1);
      private final ThreadGroup group;
      private final AtomicInteger threadNumber = new AtomicInteger(1);
      private final String namePrefix;
  
      public CustomThreadFactory(String name) {
          SecurityManager s = System.getSecurityManager();
          group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
          namePrefix = name + "-" + poolNumber.getAndIncrement() + "-thread-";
      }
  
      @Override
      public Thread newThread(Runnable r) {
          Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
          if (t.isDaemon())
              t.setDaemon(false);
          if (t.getPriority() != Thread.NORM_PRIORITY)
              t.setPriority(Thread.NORM_PRIORITY);
          return t;
      }
  }