danveloper

public class Product {
    enum ProductType {
        PRODUCT, SERVICE
    }
    String name;
    ProductType type;
    BigDecimal cost;
}

danveloper

public class Coupon {
    String id;
    double discountRate;
    List<Product.ProductType> appliesTo;
}

danveloper

public interface ProductOrderRulesEngine {
    boolean apply(ProductOrder order);
}

danveloper

public enum ProductOrderRules implements ProductOrderRulesEngine {
    /**
     * If no shipping address was explicitly selected, then we'll ship to the billing address of the payment method.
     * If the payment method doesn't have a billing address (gift card), then this rule will fail
     */
    ShippingAddressRule {
        public boolean apply(ProductOrder order) {
            // check if the shipping address is null
            if (order.shippingAddress == null && order.paymentMethod.getType() == PaymentMethod.PaymentMethodType.CREDIT_CARD) {
                // if so, find the first credit card and use its billing address as the shipping address

danveloper

/** Addresses **/
def billingAddress1        = new Address(street: "1 Main ST", unit: "7a", city: "Chicago", state: "IL", zip: 60652)
def billingAddress2        = new Address(street: "75 Dr Dre Rd.", city: "Compton", state: "CA", zip: 90220)

/** Payment Methods **/
def giftCard               = new GiftCard(number: "0000000001", balance: 50.00)
def creditCard             = new CreditCard(number: "4111111111111111", expiration: new Date(year: 2013, month: 1, date: 31), billingAddress: billingAddress1)

/** Account **/
def account                = new Account(email: "daniel.p.woods@gmail.com", orderCount: 0)

danveloper

List.metaClass.collapse = {->
    def start,end
    def reverse = delegate[0]?.getAt(0)-delegate[0]?.getAt(-1) > 0
    def expanded = delegate.flatten().unique().sort()

    def result = (reverse ? expanded.reverse() : expanded).inject([]) { l, n ->
        start = start == null ? n : start
        end = end == null ? n : end
        if ((reverse?n+1:n-1)==end) {
          end = n

danveloper

class Destructurable<E> {
    E obj
    Boolean result
    
    def getAt(idx) {
        if (idx == 0) return obj
        if (idx == 1) return result
        throw new RuntimeException("Only two parameters are returnable")
    }
}

danveloper

public class EnhancedJMSAppender extends JMSAppender {
    private String appName;

    /**
     * Method enriches the headers so that JMS consumers know who you are
     */
    @Override
    public void append(LoggingEvent event) {
        if(!checkEntryConditions()) {
            return;

danveloper

log4j.rootLogger=INFO, stdout, jms

## Be sure that ActiveMQ messages are not logged to 'jms' appender
log4j.logger.org.apache.activemq=INFO, stdout

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %-5p %c - %m%n

## Configure 'jms' appender. You'll also need jndi.properties file in order to make it work

danveloper

// If you prefer Gradle
compile 'com.danveloper.log4j:enhanced-log4j-appender:0.1-SNAPSHOT'