public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        Email.builder()
                .from("[email protected]")
                .to("[email protected]", false)
                .subject("Just testing my new library")
                .withRenderer()
                .path("template.txt")
                .bindingObject(new Example("Nijat Asgarzada"))
                .build()
                .withAttachment()
                .file("image.png")
                .build()
                .send(new MultipartMessageSender("email.properties"));
    }

    public static class Example {
        @Bind(key = "user")
        private String fullName;

        public Example(String fullName) {
            this.fullName = fullName;
        }

        public String getFullName() {
            return fullName;
        }

        public void setFullName(String fullName) {
            this.fullName = fullName;
        }

        @Override
        public String toString() {
            return "Example{" +
                    "fullName='" + fullName + '\'' +
                    '}';
        }
    }
}

public class QueueSender 
   implements 
   Sender<Void> {
    
   private 
   final 
   AmqpTemplate amqpTemplate;
    
   private 
   final 
   String queueName;
    
   private 
   final 
   ObjectMapper objectMapper;
    
    
   public 
   QueueSender(
   AmqpTemplate 
   amqpTemplate, 
   String 
   queueName, 
   ObjectMapper 
   objectMapper) {
        
   this
   .amqpTemplate 
   = amqpTemplate;
        
   this
   .queueName 
   = queueName;
        
   this
   .objectMapper 
   = objectMapper;
    }

    
   @Override
    
   public 
   Void 
   send(
   MailEntity 
   mailEntity) {
        
   this
   .amqpTemplate
   .convertAndSend(queueName, objectMapper
   .writeValueAsString(mailEntity));
        
   return 
   null;
    }
}