This following examples guide us how to use FreeMarker template for sending
an email in real time Applications.

In this example we take a scenorio in which a Sales Rep  sending an email to customer after placing the Order.

import java.io.File;
import java.io.IOException;

import freemarker.template.Configuration;
import freemarker.template.Template;

public class FreeMarkerConfig {
 
    private static FreeMarkerConfig freeMarkerConfig = null;
    private static Configuration cfg = null;
   
    private FreeMarkerConfig(ServletContext context){
        cfg = new Configuration();
        cfg.setTemplateLoader(TEMPLATE_PATH, context.getRealPath("/templates/SalesOrderEmailTemplate")));
    }
   
    public static FreeMarkerConfig getInstance(){
        if(freeMarkerConfig == null){

            freeMarkerConfig = new FreeMarkerConfig(null);
            return freeMarkerConfig;
        }
        return freeMarkerConfig;
     }
   
    public static Template getTemplateByName(String fileName){
       try{
           return cfg.getTemplate(fileName);
       }catch(IOException e){
           throw new RuntimeException("Error in loading ftl template: "+e.getMessage());
       }
   }
}

---Template Invoker - which fills the data in Email template

public class EmailTemplateReader () {
 
    public static String getMailBodyBySalesOrderEvent(Opportunity opp, WebUser webuser) throws Exception{
          Template template = FreeMarkerConfig.getTemplateByName("SalesOrder.ftl");
         
          Contact contact = LeadServices.getPrimaryContact(opp.getObjid());
          Site site = LeadServices.getPrimarySite(opp.getObjid());
          Address address = site.getAddressByCustPrimaddr2address();
         
          /* Create a data model */
         Map root = new HashMap();       
         root.put("contact", getContactData(orderId));
         root.put("webuser", getUserData(orderId));
        
         StringWriter strOut = new StringWriter();       
         /* Merge data model with template */       
         return getProcessedTemplate(root, template);
      }    
  
     public static String getProcessedTemplate(Map root, Template template){
         try{
              StringWriter textWriter = new StringWriter();
              template.process(root, textWriter); 
              return textWriter.toString();
         }catch(Exception e){
             throw new RuntimeException("Exception in processing template:"+e.getMessage());
         }
        
       }
}

SalesOrder.ftl (Template) :

${contact},

Thank you for contacting me about Java Book.  Per our discussion I have attached
a sales order for ${contact.address1} ${contact.address2} ${contact.city} ${contact.state} ${contact.zip}.
Please sign where indicated on the last page and fax the entire sales order to me at ${faxNumber}.
Once I have the signed sales order, I will place your order and get your stuff shipped.

Thank you for choosing YYYYOrg. 

Regards,

${user.userFirstName} ${user.userLastName}
${user.userOffice}
${user.userPhone}
${user.userEmail}
 

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