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 storm.trident.operation;
  
  import java.util.List;
  
  
  /**
   * Interface for publishing tuples to a stream and reporting exceptions (to be displayed in Storm UI).
   *
   * Trident components that have the ability to emit tuples to a stream are passed an instance of this
   * interface.
   *
   * For example, to emit a new tuple to a stream, you would do something like the following:
   *
   * ```java
   *      collector.emit(new Values("a", "b", "c"));
   * ```
   * @see org.apache.storm.trident.Stream
   * @see org.apache.storm.tuple.Values
   */
  public interface TridentCollector {
      /**
       * Emits a tuple to a Stream
       * @param values a list of values of which the tuple will be composed
       */
      void emit(List<Object> values);
  
      /**
       * Reports an error. The corresponding stack trace will be visible in the Storm UI.
       *
       * Note that calling this method does not alter the processing of a batch. To explicitly fail a batch and trigger
       * a replay, components should throw {@link org.apache.storm.topology.FailedException}.
       * @param t The instance of the error (Throwable) being reported.
       */
      void reportError(Throwable t);
  }
  