Configure FreemarkerViewRenderer

[JKomoroski]

I haven't been able to find a way to configure the Freemarker feature version freemarker.template.Version and the caching behavior for the FreemarkerViewRenderer.

Since the FreemarkerViewRenderer registers itself via the service loader mechanism, the default no-args constructor appears to be called . This results in the view renderer always having the default version of 2.3.0.

Is there a way to configure that version without extending the class?

Example:

import com.google.auto.service.AutoService;
import freemarker.template.Version;
import io.dropwizard.views.common.ViewRenderer;
import io.dropwizard.views.freemarker.FreemarkerViewRenderer;

@AutoService(ViewRenderer.class)
public class CustomFVR extends FreemarkerViewRenderer implements ViewRenderer {

    public CustomFVR() {
        super(new Version(2, 3, 32));
    }

    @Override
    public String getConfigurationKey() {
        return "customfreemarker";
    }
}

Also, I don't think the caching behavior for FreemarkerViews can be configured as currently designed. The mustashe implementation seems to have special logic for that behavior, but I might have missed a setting for that one.

[joschi]

You can specify the version with the incompatible_improvements configuration setting for Freemarker, see Configuration#setSetting(String, String):

# configuration.yaml
views:
  freemarker:
    incompatible_improvements: "2.3.32"

"incompatible_improvements": See setIncompatibleImprovements(Version).
String value: version number like 2.3.20.

Also, I don't think the caching behavior for FreemarkerViews can be configured as currently designed.

Which behavior do you mean exactly?

"cache_storage": See setCacheStorage(freemarker.cache.CacheStorage).

[JKomoroski]

You can specify the version with the incompatible_improvements configuration setting for Freemarker, see Configuration#setSetting(String, String):

🤣 What a nice way of telling me to RTFM. I totally misunderstood what was in the documentation. Thank you.

As for the caching, I did some debugging now understand the way that the freemarker Configurations are cached per view, and Freemarker Configuration storage cache be disabled with cache_storage: freemarker.cache.NullCacheStorage(). (writing this here so I will find it next time)

Thanks again joschi.