/*
    * 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.shardingsphere.globalclock.rule;
  
  import lombok.Getter;
  import org.apache.shardingsphere.globalclock.config.GlobalClockRuleConfiguration;
  import org.apache.shardingsphere.globalclock.provider.GlobalClockProvider;
  import org.apache.shardingsphere.globalclock.rule.constant.GlobalClockOrder;
  import org.apache.shardingsphere.infra.rule.scope.GlobalRule;
  import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
  
  import java.util.Optional;
  
  /**
   * Global clock rule.
   */
  @Getter
  public final class GlobalClockRule implements GlobalRule {
      
      private final GlobalClockRuleConfiguration configuration;
      
      private final GlobalClockProvider globalClockProvider;
      
      public GlobalClockRule(final GlobalClockRuleConfiguration ruleConfig) {
          configuration = ruleConfig;
          globalClockProvider = ruleConfig.isEnabled()
                  ? TypedSPILoader.getService(GlobalClockProvider.class, String.join(".", ruleConfig.getType(), ruleConfig.getProvider()), configuration.getProps())
                  : null;
      }
      
      /**
       * Get global clock provider.
       *
       * @return global clock provider
       */
      public Optional<GlobalClockProvider> getGlobalClockProvider() {
          return Optional.ofNullable(globalClockProvider);
      }
      
      @Override
      public int getOrder() {
          return GlobalClockOrder.ORDER;
      }
  }