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 com.alipay.remoting.rpc.protocol;
  
  import java.util.concurrent.ConcurrentHashMap;
  
  import com.alipay.remoting.util.StringUtils;
  
  /**
   * @author muyun.cyt (muyun.cyt@antfin.com)  2018/7/5   11:22 AM
   */
  public class UserProcessorRegisterHelper {
  
      /**
       * Help register single-interest user processor.
       *
       * @param processor  the processor need to be registered
       * @param userProcessors   the map of user processors
       */
      public static void registerUserProcessor(UserProcessor<?> processor,
                                               ConcurrentHashMap<String, UserProcessor<?>> userProcessors) {
          if (null == processor) {
              throw new RuntimeException("User processor should not be null!");
          }
          if (processor instanceof MultiInterestUserProcessor) {
              registerUserProcessor((MultiInterestUserProcessor) processor, userProcessors);
          } else {
              if (StringUtils.isBlank(processor.interest())) {
                  throw new RuntimeException("Processor interest should not be blank!");
              }
              UserProcessor<?> preProcessor = userProcessors.putIfAbsent(processor.interest(),
                  processor);
              if (preProcessor != null) {
                  String errMsg = "Processor with interest key ["
                                  + processor.interest()
                                  + "] has already been registered to rpc server, can not register again!";
                  throw new RuntimeException(errMsg);
              }
          }
  
      }
  
      /**
       * Help register multi-interest user processor.
       *
       * @param processor  the processor with multi-interest need to be registered
       * @param userProcessors    the map of user processors
       */
      private static void registerUserProcessor(MultiInterestUserProcessor<?> processor,
                                                ConcurrentHashMap<String, UserProcessor<?>> userProcessors) {
          if (null == processor.multiInterest() || processor.multiInterest().isEmpty()) {
              throw new RuntimeException("Processor interest should not be blank!");
          }
          for (String interest : processor.multiInterest()) {
              UserProcessor<?> preProcessor = userProcessors.putIfAbsent(interest, processor);
              if (preProcessor != null) {
                  String errMsg = "Processor with interest key ["
                                  + interest
                                  + "] has already been registered to rpc server, can not register again!";
                  throw new RuntimeException(errMsg);
              }
          }
  
      }
  }
  