com.amazon.proposalcalculator.reader.StandByInstances.java Source code

Introduction

Here is the source code for com.amazon.proposalcalculator.reader.StandByInstances.java

Source

package com.amazon.proposalcalculator.reader;

import com.amazon.proposalcalculator.bean.Price;
import com.amazon.proposalcalculator.utils.Constants;
import org.apache.commons.beanutils.BeanUtils;

import javax.xml.bind.DatatypeConverter;
import java.lang.reflect.InvocationTargetException;
import java.security.MessageDigest;
import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;

public class StandByInstances {

    public static List<Price> generate(List<Price> beanList) throws NoSuchMethodException, InstantiationException,
            IllegalAccessException, InvocationTargetException {

        Predicate<Price> predicate = c4LargeToBeCloned();

        List<Price> t2NanoToBeClonedList = beanList.stream().filter(predicate).collect(Collectors.toList());

        beanList = cloneT2Nano(beanList, t2NanoToBeClonedList);

        return beanList;
    }

    private static List<Price> cloneT2Nano(List<Price> beanList, List<Price> t2NanoToBeClonedList)
            throws InvocationTargetException, NoSuchMethodException, InstantiationException,
            IllegalAccessException {

        for (Price t2Nano : t2NanoToBeClonedList) {

            Price newPrice = (Price) BeanUtils.cloneBean(t2Nano);

            Price standbyInstance = convertToDR(newPrice);

            beanList.add(standbyInstance);

        }

        return beanList;

    }

    private static Price convertToDR(Price newPrice) {
        newPrice.setPricePerUnit(0);
        newPrice.setInstanceType(Constants.STAND_BY_INSTANCE_TYPE);
        newPrice.setvCPU(0);
        newPrice.setMemory(0);

        String sku = newPrice.getInstanceType() + newPrice.getLocation() + newPrice.getOperatingSystem()
                + newPrice.getLicenseModel();
        //        String offerTermCode = sku + newPrice.getLeaseContractLength()+newPrice.getPurchaseOption()+newPrice
        //                .getOfferingClass();
        //        String rateCodeSufix = sku + newPrice.getPriceDescription();

        String skuHash = getMD5Hash(sku, 16);

        newPrice.setSku(skuHash);

        return newPrice;

    }

    private static Predicate<Price> c4LargeToBeCloned() {
        return p -> (p.getInstanceType() != null
                && p.getInstanceType().equalsIgnoreCase(Constants.STAND_BY_INSTANCE_TYPE_TEMPLATE)
                && p.getTenancy() != null
                && p.getTenancy().equalsIgnoreCase(Constants.STAND_BY_INSTANCE_TENANCY_TEMPLATE));
    }

    /**
     * Returns a hexadecimal encoded MD5 hash for the input String.
     */
    private static String getMD5Hash(String data, int size) {
        String result = null;
        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");

            byte[] hash = digest.digest(data.getBytes("UTF-8"));

            return bytesToHex(hash, size); // make it printable

        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return result;
    }

    private static String bytesToHex(byte[] hash, int size) {
        return DatatypeConverter.printHexBinary(hash).substring(0, size);
    }

}