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robe-mail.md

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robe-mail

This module handles mail template creation, mail queue operations and mail authentication etc. These operations are handled in a developer friendly approach.

Motivation

Creating a mail bundle which can provide following points.

  • easy to understand
  • configurable
  • templating solution included (Freemarker)
  • queue support included.

Getting Started

You have to complete 4 steps in order to start mail bundle

  • Add dependency (Maven sample)
<dependency>
  <groupId>io.robe</groupId>
  <artifactId>robe-mail</artifactId>
  <version>0.5.0</version>
</dependency>
  • Decide the properties. It is directly matching with java Mail API.
mail:
 host: smtp.gmail.com
 port: 587
 auth: true
 username: [email protected]
 password: password
 tlsssl: true
  • Add bundle to the bootstrap at you Aplication
bootstrap.addBundle(new MailBundle<T>());
  • Use MailSender class whenever you want to send mail
MailItem mailItem = new MailItem();
mailItem.setBody("Some mail content");
mailItem.setReceivers(entity.getUsername());
mailItem.setTitle("Robe.io Password Change Request");
MailManager.sendMail(mailItem);
  • Or use mail templates to set mail body. (Freemarker)
Template template = null;
Map<String, Object> parameter = new HashMap<String, Object>();
Writer out = new StringWriter();
String body = mailTemplateOptional.get().getTemplate();
template = new Template("robeTemplate", body, cfg);
parameter.put("name", entity.getName());
parameter.put("surname", entity.getSurname());
template.process(parameter, out);
mailItem.setBody(out.toString());

Now it is ready for send mail.

Details

Mail Sending Operation

Here what happens at Queue and consumer thread implementation when you call MailManager.sendMail(mailItem);

  • Sender thread wakes up on every item insert and works until queue goes empty.
  • Every item in queue will be consumed only once.
  • If any error occurs it is the developers responsibility to handle it. {@link io.robe.mail.MailEvent}.