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.authorizer;
  
  import java.util.Map;
  
  import backtype.storm.Config;
  import backtype.storm.security.auth.IAuthorizer;
  import backtype.storm.security.auth.ReqContext;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * An authorization implementation that denies everything, for testing purposes
   */
  public class DenyAuthorizer implements IAuthorizer {
      private static final Logger LOG = LoggerFactory.getLogger(DenyAuthorizer.class);
  
      /**
       * Invoked once immediately after construction
       *
       * @param conf Storm configuration
       */
      public void prepare(Map conf) {
      }
  
      /**
       * permit() method is invoked for each incoming Thrift request
       *
       * @param context       request context
       * @param operation     operation name
       * @param topology_conf configuration of targeted topology
       * @return true if the request is authorized, false if reject
       */
      public boolean permit(ReqContext context, String operation, Map topology_conf) {
          LOG.info("[req " + context.requestID() + "] Access " + " from: " +
                  (context.remoteAddress() == null ? "null" : context.remoteAddress().toString())
                  + (context.principal() == null ? "" : (" principal:" + context.principal())) + " op:" + operation
                  + (topology_conf == null ? "" : (" topoology:" + topology_conf.get(Config.TOPOLOGY_NAME))));
          return false;
      }
  }
  