content: /*
   * Copyright 2024-2025 the original author or authors.
   *
   * 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
   *
   *      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 com.alibaba.cloud.ai.graph.scheduling;
  
  import java.util.function.Supplier;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Factory for creating and managing ScheduledAgentManager instances.
   *
   * @author yaohui
   * @since 1.0.0
   */
  public class ScheduledAgentManagerFactory {
  
  	private static final Logger log = LoggerFactory.getLogger(ScheduledAgentManagerFactory.class);
  
  	private static volatile ScheduledAgentManagerFactory instance;
  
  	private volatile ScheduledAgentManager activeManager;
  
  	private ScheduledAgentManagerFactory() {
  		initializeDefaultProviders();
  	}
  
  	/**
  	 * Get the singleton factory instance
  	 */
  	public static ScheduledAgentManagerFactory getInstance() {
  		if (instance == null) {
  			synchronized (ScheduledAgentManagerFactory.class) {
  				if (instance == null) {
  					instance = new ScheduledAgentManagerFactory();
  				}
  			}
  		}
  		return instance;
  	}
  
  	/**
  	 * Get the current active manager
  	 */
  	public ScheduledAgentManager getManager() {
  		return activeManager;
  	}
  
  	/**
  	 * Register a simple custom manager provider (backward compatibility)
  	 * @param provider the provider function
  	 */
  	public void registerProvider(Supplier<ScheduledAgentManager> provider) {
  		activeManager = provider.get();
  		log.info("Registered ScheduledAgentManager provider for type: {}", activeManager.getClass().getName());
  	}
  
  	private void initializeDefaultProviders() {
  		registerProvider(DefaultScheduledAgentManager::getInstance);
  	}
  
  }
  