org.apache.pulsar.functions.api.examples.WindowDurationFunction Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
*
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package org.apache.pulsar.functions.api.examples;
import java.util.Collection;
/**
* This functions collects the timestamp during the window operation.
*/
public class WindowDurationFunction implements java.util.function.Function, String> {
@Override
public String apply(Collection integers) {
long time = System.currentTimeMillis();
return String.format("%s:%s", String.join(",", integers), time);
}
}