com.kenlin.awsec2offering.Offering.java Source code

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Here is the source code for com.kenlin.awsec2offering.Offering.java

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/*
 * Copyright 2014 Ken K. Lin. All Rights Reserved.
 * 
 * Licensed 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.kenlin.awsec2offering;

import java.io.IOException;

import com.amazonaws.services.ec2.model.ReservedInstancesOffering;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * @todo Revisit the JSON schema by comparing the current output to
 * aws ec2 describe-reserved-instances-offerings
 *      --no-include-marketplace
 *      --availability-zone us-east-1a
 *      --product-description "Linux/UNIX"
 *      --offering-type "heavy utilization"
 *      --instance-type t1.micro
 */
@JsonAutoDetect
public class Offering {
    public final static String AVAILABILITYZONE = "availabilityZone";
    public final static String OFFERINGTYPE = "offeringType";
    public final static String INSTANCETYPE = "instanceType";
    public final static String PRODUCTDESCRIPTION = "productDescription";
    public final static String DURATION = "duration";
    public final static String CURRENCYCODE = "currencyCode";
    public final static String FIXEDPRICE = "fixedPrice";
    public final static String HOURLYPRICE = "hourlyPrice";

    public final static long SECONDS_IN_YEAR = 31536000;
    public final static long SECONDS_IN_3_YEARS = 94608000;
    public final static long SECONDS_IN_MONTH = SECONDS_IN_YEAR / 12; // 2628000
    public final static int HOURS_IN_MONTH = 365 * 24 / 12; // 730

    private static ObjectMapper mapper = new ObjectMapper();

    @JsonProperty
    public String availabilityZone = null; // e.g., "us-east-1a"
    @JsonProperty
    public String offeringType = null; // e.g., "Heavy Utilization"
    @JsonProperty
    public String instanceType = null; // e.g., "m1.small"
    @JsonProperty
    public String productDescription = null; // e.g., "Linux/UNIX (Amazon VPC)"
    @JsonProperty
    public String currencyCode = null; // e.g., "USD"
    @JsonProperty
    public Long duration = null; // e.g., YEAR1 or YEAR3
    @JsonProperty
    public Float fixedPrice = null; // e.g., 169.0
    @JsonProperty
    public Double hourlyPrice = null; // e.g., 0.014

    /* totalMonthlyCost functionality has been offloaded to the client-side
        
       private float totalMonthlyCost[] = null;   // Where [0..36]
        
       // Create and populate totalMonthlyCost[1 + 36].
       private static float[] calculateTotalCost(long duration, float fixedPrice, double hourlyPrice) {
          float totalMonthlyCost[] = null;
          if (fixedPrice > 0 && hourlyPrice > 0) {
     final double monthlyPrice = hourlyPrice * HOURS_IN_MONTH;
     long durationInMonths = duration / SECONDS_IN_MONTH;
        
     totalMonthlyCost = new float[1 + 36];
     totalMonthlyCost[0] = fixedPrice;
     for (int month = 1; month <= 36; month++) {
        long terms = ((month - 1) / durationInMonths) + 1;   // 1 year term 1 = months 0-12, 1 year term 2 = months 13-24
        totalMonthlyCost[month] = (float)(terms * fixedPrice);
        totalMonthlyCost[month] += (float)(month * monthlyPrice);
     }
          }
          return totalMonthlyCost;
       }
    */

    public Offering() {
    }

    public Offering(ReservedInstancesOffering offering) {
        availabilityZone = offering.getAvailabilityZone();
        offeringType = offering.getOfferingType();
        instanceType = offering.getInstanceType();
        productDescription = offering.getProductDescription();
        currencyCode = offering.getCurrencyCode();
        duration = offering.getDuration();
        fixedPrice = offering.getFixedPrice();
        try {
            hourlyPrice = offering.getRecurringCharges().get(0).getAmount();
        } catch (IndexOutOfBoundsException e) {
            hourlyPrice = offering.getUsagePrice().doubleValue(); // e.g., c1.medium
        }
        /* totalMonthlyCost functionality has been offloaded to the client-side         
              totalMonthlyCost   = calculateTotalCost(duration, fixedPrice, hourlyPrice);
        */
    }

    @Override
    public String toString() {
        try {
            JsonNode json = toJsonNode();
            return json.toString();
        } catch (JsonProcessingException e1) {
            e1.printStackTrace();
            return null;
        } catch (IOException e1) {
            e1.printStackTrace();
            return null;
        }
    }

    public JsonNode toJsonNode() throws JsonProcessingException, IOException {
        ObjectNode json = mapper.createObjectNode();
        if (availabilityZone != null)
            json.put(AVAILABILITYZONE, availabilityZone);
        if (offeringType != null)
            json.put(OFFERINGTYPE, offeringType);
        if (instanceType != null)
            json.put(INSTANCETYPE, instanceType);
        if (productDescription != null)
            json.put(PRODUCTDESCRIPTION, productDescription);
        if (duration != null)
            json.put(DURATION, duration);
        if (currencyCode != null)
            json.put(CURRENCYCODE, currencyCode);
        if (fixedPrice != null)
            json.put(FIXEDPRICE, fixedPrice);
        if (hourlyPrice != null)
            json.put(HOURLYPRICE, hourlyPrice);
        return json;
    }
}