How to properly chain template resolvers in thymeleaf?

Question

Java

I'm setting up email templates. faced such a problem.
I declare a bin.

@Bean
  public TemplateResolver mailTemplateResolver() {
    TemplateResolver templateResolver = new ClassLoaderTemplateResolver();
    templateResolver.setPrefix(MAIL);
    templateResolver.setSuffix(".html");
    templateResolver.setOrder(1);
    templateResolver.setCharacterEncoding("UTF-8");
    templateResolver.setTemplateMode("HTML5");
    templateResolver.setCacheable(false);
    return templateResolver;
  }

  @Bean
  public TemplateResolver webTemplateResolver() {
    TemplateResolver templateResolver = new ServletContextTemplateResolver();
    templateResolver.setPrefix(VIEWS);
    templateResolver.setSuffix(".html");
    templateResolver.setCharacterEncoding("UTF-8");
    templateResolver.setOrder(2);
    templateResolver.setTemplateMode("HTML5");
    templateResolver.setCacheable(false);
    return templateResolver;
  }

  @Bean
  public SpringTemplateEngine templateEngine() {
    SpringTemplateEngine templateEngine = new SpringTemplateEngine();
    templateEngine.addTemplateResolver(mailTemplateResolver());
    templateEngine.addTemplateResolver(webTemplateResolver());
    templateEngine.addDialect(new SpringSecurityDialect());
    return templateEngine;
  }

  @Bean
  public AjaxThymeleafViewResolver viewResolver() {
    AjaxThymeleafViewResolver thymeleafViewResolver = new AjaxThymeleafViewResolver();
    thymeleafViewResolver.setTemplateEngine(templateEngine());
    thymeleafViewResolver.setViewClass(FlowAjaxThymeleafView.class);
    thymeleafViewResolver.setCharacterEncoding("UTF-8");
    thymeleafViewResolver.setContentType("text/html; charset=UTF-8");
    return thymeleafViewResolver;
  }

Nothing seems to portend trouble. Both beans are declared sequentially. mail is the first, mailResolver's setOrder is the first. It is added to the set of resolvers - the first one. But when I try to call

final Context ctx = new Context(LocaleContextHolder.getLocale());
          ctx.setVariable("name", "name");
          ctx.setVariable("subscriptionDate", LocalDate.now());
          ctx.setVariable("hobbies", Arrays.asList("Cinema", "Sports", "Music"));

          final String htmlContent = templateEngine.process("welcomeEmail", ctx);

It substitutes exactly ServletContextTemplateResolver. And accordingly, quite deservedly gives me

org.thymeleaf.exceptions.TemplateProcessingException: Resource resolution by ServletContext with org.thymeleaf.resourceresolver.ServletContextResourceResolver can only be performed when context implements org.thymeleaf.context.IWebContext [current context: org.thymeleaf.context.Context]

How to be and how to properly set up this shaitan machine?

Answer 1

You need to put the letter template files in the src/main/resources/mail folder and the bin configuration looks like this

@Bean
    public ClassLoaderTemplateResolver emailTemplateResolver() {
        ClassLoaderTemplateResolver resolver = new ClassLoaderTemplateResolver();
        resolver.setPrefix("mail/");
        resolver.setSuffix(".html");
        resolver.setTemplateMode("HTML5");
        resolver.setCacheable(false);
        resolver.setCharacterEncoding("UTF-8");
        resolver.setOrder(1);
        return resolver;
    }

Carefully set the resolver.setPrefix prefix...