/**
 * 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 org.apache.heron.streamlet;

import java.io.Serializable;

/**
 * Sink is how Streamlet's end. The put method
 * invocation consumes the tuple into say external database/cache, etc.
 * setup/cleanup is where the sink can do any one time setup work, like
 * establishing/closing connection to sources, etc.
 */
public interface Sink<T> extends Serializable {
  void setup(Context context);
  void put(T tuple);
  void cleanup();
}