com.nextbreakpoint.flink.dummies.TemperatureAccumulator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of com.nextbreakpoint.flink.dummies Show documentation

Collection of dummy jobs for Apache Flink

The newest version!

/*
 * This file is part of Flink Dummies
 * https://github.com/nextbreakpoint/flink-dummies
 */
package com.nextbreakpoint.flink.dummies;

import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.math.BigDecimal;
import java.math.RoundingMode;

@Data
@Builder(toBuilder = true, setterPrefix = "with")
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class TemperatureAccumulator {
    private BigDecimal maximumTemperature;
    private BigDecimal temperature;
    private int count;

    public TemperatureAccumulator add(BigDecimal element) {
        return this.toBuilder()
                .withMaximumTemperature(this.maximumTemperature.max(element))
                .withTemperature(this.temperature.add(element))
                .withCount(this.count + 1)
                .build();
    }

    public TemperatureAccumulator add(TemperatureAccumulator otherAccumulator) {
        return this.toBuilder()
                .withTemperature(this.maximumTemperature.max(otherAccumulator.maximumTemperature))
                .withTemperature(this.temperature.add(otherAccumulator.temperature))
                .withCount(this.count + otherAccumulator.count)
                .build();
    }

    public BigDecimal getAverageTemperature() {
        return temperature.divide(BigDecimal.valueOf(count), 2, RoundingMode.HALF_DOWN);
    }
}