TimeStampExtractor.java

/*
 * #!
 * %
 * Copyright (C) 2014 - 2016 Humboldt-Universität zu Berlin
 * %
 * Licensed 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 de.hub.cs.dbis.aeolus.utils;

import java.io.Serializable;

import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;





/**
 * {@link TimeStampExtractor} extract the timestamp from a given {@link Tuple} or {@link Values}. (Type {@code T} is
 * expected to be either {@link Tuple} (for usage in bolts) or {@link Values} (for usage in spouts).)
 * 
 * @author mjsax
 */
public interface TimeStampExtractor<T> extends Serializable {
	
	public long getTs(T tuple);
	
}