org.apache.pulsar.functions.api.examples.window.ContextWindowFunction Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
*
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package org.apache.pulsar.functions.api.examples.window;
import java.util.Collection;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.functions.api.Record;
import org.apache.pulsar.functions.api.WindowContext;
import org.apache.pulsar.functions.api.WindowFunction;
/**
* Example Function that acts on a window of tuples at a time rather than per tuple basis.
*/
@Slf4j
public class ContextWindowFunction implements WindowFunction {
@Override
public Integer process(Collection> integers, WindowContext context) {
Integer retval = 0;
for (Record record : integers) {
retval += record.getValue();
}
return retval;
}
}