struts2, freemarker: load template from memory

1. register in struts.xml


2. Extends FreeMarkerManager
public class FreeMarkerManager extends FreemarkerManager {
    protected TemplateLoader getTemplateLoader(ServletContext servletContext) {
        FormTemplateLoader templateLoader = new FormTemplateLoader();

        return new MultiTemplateLoader(new TemplateLoader[]{
                   templateLoader,
                   new WebappTemplateLoader(servletContext),
                   new StrutsClassTemplateLoader()
                });
    }
}

3. Implement TemplateLoader
public class FormTemplateLoader implements TemplateLoader {
  public Object findTemplateSource(String name) {
    // getTemplates() returns map containing template list with template name as key
    source = (String) getTemplates().get(name);
    lastModified = System.currentTimeMillis();
    return source;
  }

   ...
}