content: /*
   * Copyright 1999-2019 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
   *
   *      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.csp.sentinel.adapter.gateway.sc.api;
  
  import com.alibaba.csp.sentinel.adapter.gateway.common.api.ApiDefinition;
  import com.alibaba.csp.sentinel.adapter.gateway.sc.api.matcher.WebExchangeApiMatcher;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  /**
   * @author Eric Zhao
   * @since 1.6.0
   */
  public final class GatewayApiMatcherManager {
  
      private static volatile Map<String, WebExchangeApiMatcher> API_MATCHER_MAP = new HashMap<>();
  
      public static Map<String, WebExchangeApiMatcher> getApiMatcherMap() {
          return Collections.unmodifiableMap(API_MATCHER_MAP);
      }
  
      public static Optional<WebExchangeApiMatcher> getMatcher(final String apiName) {
          return Optional.ofNullable(apiName)
              .map(e -> API_MATCHER_MAP.get(apiName));
      }
  
      public static Set<ApiDefinition> getApiDefinitionSet() {
          return API_MATCHER_MAP.values()
              .stream()
              .map(WebExchangeApiMatcher::getApiDefinition)
              .collect(Collectors.toSet());
      }
  
      static synchronized void loadApiDefinitions(/*@Valid*/ Set<ApiDefinition> definitions) {
          Map<String, WebExchangeApiMatcher> apiMatcherMap = new HashMap<>();
          for (ApiDefinition definition : definitions) {
              apiMatcherMap.put(definition.getApiName(), new WebExchangeApiMatcher(definition));
          }
  
          API_MATCHER_MAP = apiMatcherMap;
      }
  
      private GatewayApiMatcherManager() {}
  }
  