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.csp.sentinel.concurrent;
  
  import java.util.concurrent.ThreadFactory;
  import java.util.concurrent.atomic.AtomicInteger;
  
  /**
   * Wrapped thread factory for better use.
   */
  public class NamedThreadFactory implements ThreadFactory {
  
      private final ThreadGroup group;
      private final AtomicInteger threadNumber = new AtomicInteger(1);
  
      private final String namePrefix;
      private final boolean daemon;
  
      public NamedThreadFactory(String namePrefix, boolean daemon) {
          this.daemon = daemon;
          SecurityManager s = System.getSecurityManager();
          group = (s != null) ? s.getThreadGroup() :
              Thread.currentThread().getThreadGroup();
          this.namePrefix = namePrefix;
      }
  
      public NamedThreadFactory(String namePrefix) {
          this(namePrefix, false);
      }
  
      @Override
      public Thread newThread(Runnable r) {
          Thread t = new Thread(group, r, namePrefix + "-thread-" + threadNumber.getAndIncrement(), 0);
          t.setDaemon(daemon);
          return t;
      }
  }