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.topology;
  
  import java.io.Serializable;
  import java.util.Map;
  
  /**
   * Common methods for all possible components in a topology. This interface is used when defining topologies using the Java API.
   */
  public interface IComponent extends Serializable {
  
      /**
       * Declare the output schema for all the streams of this topology.
       *
       * @param declarer this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream
       */
      void declareOutputFields(OutputFieldsDeclarer declarer);
  
      /**
       * Declare configuration specific to this component. Only a subset of the "topology.*" configs can be overridden. The component configuration can be further
       * overridden when constructing the topology using {@link TopologyBuilder}
       */
      Map<String, Object> getComponentConfiguration();
  
  }
  