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.cluster.registry;
  
  import com.alibaba.csp.sentinel.log.RecordLog;
  import com.alibaba.csp.sentinel.util.AppNameUtil;
  import com.alibaba.csp.sentinel.util.AssertUtil;
  import com.alibaba.csp.sentinel.util.function.Supplier;
  
  /**
   * @author Eric Zhao
   * @since 1.4.0
   */
  public final class ConfigSupplierRegistry {
  
      /**
       * The default namespace supplier provides appName as namespace.
       */
      private static final Supplier<String> DEFAULT_APP_NAME_SUPPLIER = new Supplier<String>() {
          @Override
          public String get() {
              return AppNameUtil.getAppName();
          }
      };
      /**
       * Registered namespace supplier.
       */
      private static Supplier<String> namespaceSupplier = DEFAULT_APP_NAME_SUPPLIER;
  
      /**
       * Get the registered namespace supplier.
       *
       * @return the registered namespace supplier
       */
      public static Supplier<String> getNamespaceSupplier() {
          return namespaceSupplier;
      }
  
      public static void setNamespaceSupplier(Supplier<String> namespaceSupplier) {
          AssertUtil.notNull(namespaceSupplier, "namespaceSupplier cannot be null");
          ConfigSupplierRegistry.namespaceSupplier = namespaceSupplier;
          RecordLog.info("[ConfigSupplierRegistry] New namespace supplier provided, current supplied: {}",
              namespaceSupplier.get());
      }
  
      private ConfigSupplierRegistry() {}
  }
  