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.adapter.dubbo;
  
  import com.alibaba.dubbo.rpc.Invocation;
  
  /**
   * @author Eric Zhao
   */
  public final class DubboUtils {
  
      public static final String DUBBO_APPLICATION_KEY = "dubboApplication";
  
      public static String getApplication(Invocation invocation, String defaultValue) {
          if (invocation == null || invocation.getAttachments() == null) {
              throw new IllegalArgumentException("Bad invocation instance");
          }
          return invocation.getAttachment(DUBBO_APPLICATION_KEY, defaultValue);
      }
  
      private DubboUtils() {}
  }
  