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
   *
   *   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.bifromq.baseenv;
  
  import java.util.concurrent.ThreadFactory;
  
  /**
   * This is a service provider interface(SPI) for customizing the thread running environment.
   */
  public interface IEnvProvider {
      /**
       * Get current available processors number
       *
       * @return the available processors number
       */
      int availableProcessors();
  
      /**
       * Create a thread factory with given parameters
       *
       * @param name     the name of the created thread
       * @param daemon   if created thread is daemon thread
       * @param priority the priority of created thread
       * @return the created thread
       */
      ThreadFactory newThreadFactory(String name, boolean daemon, int priority);
  
      /**
       * Create a thread factory which creating thread with normal priority
       *
       * @param name   the name of the created thread
       * @param daemon if created thread is daemon thread
       * @return the created thread
       */
      default ThreadFactory newThreadFactory(String name, boolean daemon) {
          return newThreadFactory(name, daemon, Thread.NORM_PRIORITY);
      }
  
      /**
       * Create a thread factory which creating non-daemon thread with normal priority
       *
       * @param name the name of the created thread
       * @return the created thread
       */
      default ThreadFactory newThreadFactory(String name) {
          return newThreadFactory(name, false);
      }
  }
  