Email Configuration

Basic Configuration

Broadleaf has a flexible engine for sending template-driven emails to your customers. These emails may be configured to be sent out as part of a workflow step (i.e. order confirmation email at the end of the checkout workflow), or sent out as part of a Quartz scheduled job (i.e. weekly customer newsletter). The appearance of emails may be text only, or may be based on an exotic Thymeleaf template that you create - the choice is yours. Let's start by looking at the default definition of Thymeleaf email templates:

<bean id="blEmailTemplateResolver" class="org.thymeleaf.templateresolver.ClassLoaderTemplateResolver">
    <property name="prefix" value="emailTemplates/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5" />
    <property name="cacheable" value="false"/>
    <property name="characterEncoding" value="UTF-8" />
</bean>

<bean id="blEmailTemplateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine">
    <property name="templateResolvers">
        <set>
            <ref bean="blEmailTemplateResolver" />
        </set>
    </property>
    <property name="dialects">
        <set>
            <ref bean="thymeleafSpringStandardDialect" />
            <ref bean="blDialect" />
        </set>
    </property>
</bean>

Note: We are choosing to use Thymeleaf as the default email templating engine -- you could, of course, use any engine you like (such as JSP or Velocity).

Next, let's examine a part of the default applicationContext-email.xml file bundled in the starter project.

<bean id="blMessageCreator" class="org.broadleafcommerce.common.email.service.message.NullMessageCreator">
    <constructor-arg ref="blMailSender"/>
</bean>

Notice that although we define a default blMessageCreator, it is pointing to a NullMessageCreator. Let's change this definition to a real implementation and set up an email bean.

<bean id="blMessageCreator" class="org.broadleafcommerce.common.email.service.message.ThymeleafMessageCreator">
    <constructor-arg ref="blEmailTemplateEngine"/>
    <constructor-arg ref="mailSender"/>
</bean>

<bean id="orderConfirmationEmailInfo" parent="blEmailInfo">
    <property name="subject" value="Order Confirmation"/>
    <property name="emailTemplate" value="order_confirmation_email"/>
    <property name="emailType" value="ORDER_CONFIRMATION"/>
</bean>

Now that our tempaltes are set up properly, we need to define an actual mail server to use. The default mail server defined in Broadleaf is as follows:

<bean id="blMailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
    <property name="host"><value>localhost</value></property>
    <property name="port"><value>25</value></property>
    <property name="protocol"><value>smtp</value></property>
    <property name="javaMailProperties">
        <props>
            <prop key="mail.smtp.starttls.enable">true</prop>
            <prop key="mail.smtp.timeout">25000</prop>
        </props>
    </property>
</bean>

You will want to define a blMailSender bean in your application context that points to your own SMTP server, which will override the default Broadleaf definition.

Pretty easy! We now have a orderConfirmationEmailInfo bean that points to the order_confirmation_email template. Based on the resolver definition we showed above, we can expect to find this template in site/src/main/resources/emailTemplates/order_confirmation_email.html.

Note: A list of all possible properties can be found at the bottom of this page

Preparing the Code to Send Emails

You'll likely want to establish your own service class that's responsible for sending out emails. Let's take a look at an example interface for a service capable of sending our order confirmation email:

public interface MyEmailWebService {
void sendOrderConfirmation(String orderNumber, String emailAddress) throws IOException, ServiceException;
}

and an implementation:

@Service("myEmailService")
public class MyEmailServiceImpl implements MyEmailWebService {

    @Autowired
    @Qualifier("blNotificationDispatcher")
    protected NotificationDispatcher notificationDispatcher;

    @Autowired
    @Qualifier("blOrderService")
    protected OrderService orderService;

    public void sendOrderConfirmation(String orderNumber, String emailAddress) throws IOException, ServiceException {
        Order order = orderService.findOrderByOrderNumber(orderNumber);
        HashMap<String, Object> props = new HashMap<String, Object>();
        props.put("orderNumber", orderNumber);
        props.put("order", order);
        props.put("customer", order.getCustomer());
        notificationDispatcher.dispatchNotification(new EmailNotification(emailAddress, NotificationEventType.ORDER_CONFIRMATION, props));
    }

}

Our service has only one major method called sendOrderConfirmation. This method accepts the order number and the customer email address. For this email, the order date and order id are important variables for the content of the email. We create a HashMap to hold these variables and pass them to the NotificationDispatcher dispatchNotification method along with the email address and the NotificationEventType.

Now that you have a service to initiate the sending of your email, you'll want to add code to call it. For an order confirmation email, it makes the most sense to send the email in the last step of the checkout workflow. To achieve this end, we'll override the last activity in the checkout flow with a custom activity.

<bean id="blCheckoutWorkflow" class="org.broadleafcommerce.core.workflow.SequenceProcessor">
<property name="processContextFactory">
    <bean class="org.broadleafcommerce.core.checkout.service.workflow.CheckoutProcessContextFactory"/>
</property>
<property name="activities">
    <list>
        <bean class="org.broadleafcommerce.core.offer.service.workflow.VerifyCustomerMaxOfferUsesActivity"/>
        <bean class="org.broadleafcommerce.core.checkout.service.workflow.PaymentServiceActivity"/>
        <bean class="org.broadleafcommerce.core.offer.service.workflow.RecordOfferUsageActivity"/>
        <bean class="com.mycompany.checkout.service.workflow.MyCompleteOrderActivity"/>
    </list>
</property>
<property name="defaultErrorHandler" ref="blDefaultErrorHandler"/>
</bean>

In this workflow configuration, we've changed the last activity to a new custom activity we've developed.

Please refer to the [[checkout workflow configuration | Checkout Workflow]] guide and the general [[workflow and activities | Workflow and Activities]] guide for more information.

We'll also need to implement our new custom activity:

public class MyCompleteOrderActivity extends CompleteOrderActivity {

@Resource(name="myEmailService")
MyEmailService myEmailService;

@Override
public ProcessContext execute(ProcessContext context) throws Exception {
    CheckoutSeed seed = ((CheckoutContext) context).getSeedData();
    Order order = seed.getOrder();
    myEmailService.sendOrderConfirmation(order.getOrderNumber(), order.getCustomer().getEmailAddress());
    return super.execute(context);
}
}

This activity utilizes the Order instance in the CheckoutContext passed into the execute method to harvest the necessary information to send the email through injected MyEmailService instance. Once this goal is achieved, the call is passed off to the superclass for normal handling.

Preparing the Template

We also need a Thymeleaf template for our order confirmation email. Thymeleaf templates provide you a rich mechanism for creating and formatting elaborate emails with dynamic content. Let's take a look at a simple template for our order confirmation email:

<html>
  <head><title>Order Confirmation Email</title></head>
  <body background="#FFFFFF">
    <h1>Thank You For Your Order!</h1>
    <table>
      <tr><td>Order Number:</td><td th:text="${order.orderNumber}"></td></tr>
    </table>
  </body>
</html>

This template (order_confirmation_email.html) formats a simple HTML email with several items of dynamic content. You'll notice that we specify the orderDate and orderId variables in the template. These variables will be inserted dynamically by the Thymeleaf engine when the template is parsed.

Note, if you wish to use the serverinfo variable, you should override the bean definition for "blServerInfo" and provide your own configuration. Something like the following is in order:

<bean id="blServerInfo" class="org.broadleafcommerce.email.service.info.ServerInfo">
    <property name="serverName" value="myHost.com"/>
    <property name="serverPort" value="80"/>
</bean>

Asynchronous Distribution

Many users will wish to employ asynchronous sending for Broadleaf Commerce emails. Asynchronous emails have the following advantages:

Client thread is not blocked while email is sent
Better utilization of customer handling resources
Guaranteed delivery

Broadleaf Commerce achieves asynchronous sending via a JMS (Java Message Service) compliant message broker. We suggest Apache ActiveMQ for an open-source, high-performance message broker, although most JMS message brokers should work. Once your message broker is installed and operational, you'll need to configure Broadleaf Commerce to post and consume messages.

<bean id="jmsFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
    <property name="brokerURL" value="failover:(tcp://localhost:61616)?randomize=false"/>
</bean>

<bean id="jmsDestination" class="org.springframework.jndi.JndiObjectFactoryBean" abstract="true">
    <property name="jndiEnvironment">
        <props>
            <prop key="java.naming.factory.initial">
                org.apache.activemq.jndi.ActiveMQInitialContextFactory
            </prop>
            <prop key="java.naming.provider.url">
                failover:(tcp://localhost:61616)?randomize=false
            </prop>
        </props>
    </property>
</bean>

<bean id="emailServiceQueue" parent="jmsDestination">
    <property name="jndiName" value="EmailServiceQueue"/>
    <property name="jndiEnvironment">
        <props merge="true">
            <prop key="queue.EmailServiceQueue">
                my.queue.EmailService
            </prop>
        </props>
    </property>
</bean>

<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
    <property name="connectionFactory" ref="jmsFactory"/>
</bean>

<bean id="redeliveryPolicy" class="org.apache.activemq.RedeliveryPolicy">
    <property name="maximumRedeliveries" value="2"/>
    <property name="initialRedeliveryDelay" value="1000"/>
</bean>

<bean id="consumerConnection" class="org.springframework.jms.connection.SingleConnectionFactory">
    <property name="targetConnectionFactory">
        <bean class="org.apache.activemq.ActiveMQConnectionFactory">
            <property name="brokerURL" value="failover:(tcp://localhost:61616)?randomize=false"/>
            <property name="redeliveryPolicy" ref="redeliveryPolicy"/>
        </bean>
    </property>
</bean>

<bean id="emailServiceContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer">
    <property name="connectionFactory" ref="consumerConnection"/>
    <property name="destination" ref="emailServiceQueue"/>
    <property name="messageListener" ref="emailServiceMessageListener"/>
    <property name="pubSubNoLocal" value="true"/>
    <property name="sessionTransacted" value="true"/>
    <!-- control the consumption load -->
    <property name="concurrentConsumers" value="2"/>
    <property name="maxConcurrentConsumers" value="2"/>
    <property name="cacheLevelName" value="CACHE_CONSUMER"/>
    <property name="acceptMessagesWhileStopping" value="false"/>
</bean>

<bean id="emailServiceProducer" class="org.broadleafcommerce.common.email.service.jms.JMSEmailServiceProducerImpl">
    <property name="emailServiceTemplate" ref="jmsTemplate"/>
    <property name="emailServiceDestination" ref="emailServiceQueue"/>
</bean>

<bean id="emailServiceMessageListener" class="org.broadleafcommerce.common.email.service.jms.EmailServiceMDP"/>

<bean id="blEmailService" class="org.broadleafcommerce.common.email.service.EmailServiceImpl">
    <property name="emailServiceProducer" ref="emailServiceProducer"/>
</bean>

Most of the items exhibited here are boilerplate configuration for Spring and JMS/ActiveMQ. We configure the connection factory, queue and listener container much like any other Spring JMS configuration. The key configuration items from a Broadleaf Commerce perspective are the emailServiceProducer, emailServiceMessageListener and blEmailService beans. These beans are primarily responsible for posting messages to and reading messages from a queue. The configuration for the emailServiceProducer beans requires a org.springframework.jms.core.JmsTemplate and a javax.jms.Destination (provided by the JndiObjectFactoryBean) instance. The emailServiceMessageListener bean has no direct requirements and should be set to org.broadleafcommerce.common.email.service.jms.EmailServiceMDP, unless additional behavior is required at the moment of delivery, which would require an override or new version of EmailServiceMDP. Finally, for asynchronous configuration, the key bean id must be overridden with an instance of EmailServiceImpl providing our EmailServiceProducer instance to the emailServiceProducer property.

Synchronous Distribution

Some users will not require asynchronous email sending. If time spent sending an email is not important to your process and if guaranteed delivery is not a requirement, then synchronous email is the right choice for you. Synchronous sending does not require the presence or configuration for a JMS message broker. Instead, only a simple alteration to our earlier configuration is required. Recall our configuration for baseEmailInfo:

<bean id="baseEmailInfo" abstract="true">
    <property name="sendEmailReliableAsync" value="true"/>
    <property name="fromAddress" value="My Store &lt;contact@mystore.com&gt;"/>
    <property name="sendAsyncPriority" value="8"/>
</bean>

The following converts our baseEmailInfo bean into a synchronous email:

<bean id="baseEmailInfo" abstract="true">
    <property name="sendEmailReliableAsync" value="false"/>
    <property name="fromAddress" value="My Store &lt;contact@mystore.com&gt;"/>
</bean>

Non-Template Emails

Some users will prefer not to use a Thymeleaf template to drive the formatting and presentation of their emails. In fact, some of your email needs may be very simplistic and creation of a Thymeleaf template is overkill. In these cases, you'll want to simply supply the body content for your email as a simple string. Let review how we would configure this type of email:

<bean id="orderConfirmationEmailInfo" class="org.broadleafcommerce.common.email.service.info.EmailInfo" parent="baseEmailInfo" scope="prototype">
    <property name="messageBody" value="This is a test email!"/>
    <property name="emailType" value="ORDER_CONFIRMATION"/>
    <property name="subject" value="Thank You For Your Order!"/>
</bean>

Here, we've altered the configuration for our orderConfirmationEmailInfo bean, removing the emailTemplate property and replacing it with the messageBody property. If you recall, the messageBody field of the EmailInfo class allows the programmer to supply the specific text that will be included in the body of the email.

Adding File Attachments

You may also create emails with Broadleaf Commerce that contain file attachments. Let's revisit our basic email example from above and add a few attachments:

public void sendOrderConfirmation(String orderNumber, String emailAddress) throws IOException, ServiceException {
        Order order = orderService.findOrderByOrderNumber(orderNumber);
        HashMap<String, Object> props = new HashMap<String, Object>();
        props.put("orderNumber", orderNumber);
        props.put("order", order);
        props.put("customer", order.getCustomer());

        StringBuffer file = new StringBuffer();
        file.append("name,address,city,state,zip\n");
        file.append("john,123 test road,dallas,tx,75240\n");
        file.append("jess,546 test road,dallas,tx,75244\n");

        Attachment attachment = new Attachment();
        attachment.setData(file.toString().getBytes());
        attachment.setMimeType("text/plain");
        attachment.setFilename("OrderMembers.txt");

        EmailNotification notification = new EmailNotification(emailAddress, NotificationEventType.ORDER_CONFIRMATION, props);
        notification.getAttachments().add(attachment);
        notificationDispatcher.dispatchNotification(notification);
}

In this example, we've created a theoretical CSV file attachment by building a properly formatted String instance and then creating an Attachment instance using the bytes from that String and the proper MIME type. One could also retrieve the bytes from a local file, or any other source you can convert to a byte array.

Email Property Reference

Property	Description	Java / XML config
emailType	Type of the email, corresponds with the enumeration NotificationEventType	Both
emailTemplate	Path to a Thymeleaf template used to generate the email presentation	Both
subject	The subject for the email	Both
fromAddress	The fromAddress for the email	Both
messageBody	Set messageBody for emails that are not template driven.	Both
attachments	File attachments associated with the email	Programmatic
sendEmailReliableAsync	Use JMS to execute the distribution of this email. Otherwise, emails are sent in the calling thread.	Both
sendAsyncPriority	Assign the relative JMS priority for this email. Applies only to asynchronous email distribution.	Both