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 backtype.storm.security.auth;
  
  import java.util.Map;
  
  /**
   * Nimbus could be configured with an authorization plugin. If not specified, all requests are authorized.
   * 
   * You could specify the authorization plugin via storm parameter. For example: storm -c nimbus.authorization.class=backtype.storm.security.auth.NoopAuthorizer
   * ...
   * 
   * You could also specify it via storm.yaml: nimbus.authorization.class: backtype.storm.security.auth.NoopAuthorizer
   */
  public interface IAuthorizer {
      /**
       * Invoked once immediately after construction
       * 
       * @param conf Storm configuration
       */
      void prepare(Map storm_conf);
  
      /**
       * permit() method is invoked for each incoming Thrift request.
       * 
       * @param context request context includes info about
       * @param operation operation name
       * @param topology_storm configuration of targeted topology
       * @return true if the request is authorized, false if reject
       */
      public boolean permit(ReqContext context, String operation, Map topology_conf);
  }
  