IControlOutputCollector.java

/**
 * 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 backtype.storm.tuple.Tuple;

import java.util.Collection;
import java.util.List;

/**
 * @author JohnFang (xiaojian.fxj@alibaba-inc.com).
 */
public interface IControlOutputCollector {
    /**
     * emit control message for bolt
     */
    List<Integer> emitCtrl(String streamId, Collection<Tuple> anchors, List<Object> tuple);

    void emitDirectCtrl(int taskId, String streamId, Collection<Tuple> anchors, List<Object> tuple);

}