org.apache.storm.topology.TupleFieldTimestampExtractor Maven / Gradle / Ivy
/**
* 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.storm.topology;
import org.apache.storm.tuple.Tuple;
import org.apache.storm.windowing.TimestampExtractor;
/**
* A {@link TimestampExtractor} that extracts timestamp from a specific field in the tuple.
*/
public final class TupleFieldTimestampExtractor implements TimestampExtractor {
private static final long serialVersionUID = 5212225232807940572L;
private final String fieldName;
private TupleFieldTimestampExtractor(String fieldName) {
this.fieldName = fieldName;
}
@Override
public long extractTimestamp(Tuple tuple) {
return tuple.getLongByField(fieldName);
}
public static TupleFieldTimestampExtractor of(String fieldName) {
return new TupleFieldTimestampExtractor(fieldName);
}
@Override
public String toString() {
return "TupleFieldTimestampExtractor{" + "fieldName='" + fieldName + '\'' + '}';
}
}