com.groupbyinc.experimentapi.bucketer.BucketConfiguration Maven / Gradle / Ivy

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package com.groupbyinc.experimentapi.bucketer;

import java.util.stream.IntStream;

public class BucketConfiguration {
    private int[] bucketPercentages = null;
    private int trafficAllocation = -1;
    private int trafficAllocationOffset = -1;

    public BucketConfiguration() throws ConfigurationException{
    }

    public BucketConfiguration(int[] percentages, int allocation, int allocationOffset) throws ConfigurationException{
        bucketPercentages = percentages;
        trafficAllocation = allocation;
        trafficAllocationOffset = allocationOffset;
        init();
    }

    public final BucketConfiguration init() throws ConfigurationException {
        if (bucketPercentages == null){
            throw new ConfigurationException("Bucket percentages can not be null");
        }
        if (IntStream.of(bucketPercentages).sum() != 100) {
            throw new ConfigurationException("Bucket percentages should add to 100");
        }
        if (trafficAllocation <= 0 || trafficAllocation > 100) {
            throw new ConfigurationException("Traffic allocation must be an integer between 1 and 100");
        }
        if (trafficAllocationOffset < 0 || trafficAllocationOffset > 100) {
            throw new ConfigurationException("Traffic allocation offset must be an integer between 0 and 100");
        }
        if (trafficAllocation + trafficAllocationOffset > 100){
            throw new ConfigurationException("Sum of trafficAllocation and trafficAllocationOffset must be less than 100");
        }
        return this;
    }

    public int[] getBucketPercentages() {
        return bucketPercentages;
    }

    public int getTrafficAllocation() {
        return trafficAllocation;
    }

    public int getTrafficAllocationOffset() { return trafficAllocationOffset; }
}