caching - Orchard programmatically purge cache

Question

I am caching something with:

var htmlHEAD = _cacheManager.Get(THE_CACHE_KEY, ctx =>
        {
            ctx.Monitor(_clock.When(TimeSpan.FromMinutes(60)));

            return getTenantSpecificHeadHTMLFromDB()
        });

However, I want to be able to hit a URL and purge the cache if a quick change is ever needed.

eg. this is in AdminController.

public ActionResult purgeCache() {
    _cacheMangager.PurgeCache(THE_CACHE_KEY); //this doesn't exist :(

    return Content("OK");
}

How can I do this?

Answer 1

不要只监视基于时间的过期，还要监视命名信号（注入ISignals和 ctx.Monitor(_signals.When("SomeUniqueKeyForYourExpirationSignal"));），然后在您想要清除缓存条目时触发该信号：_signals.Trigger("SomeUniqueKeyForYourExpirationSignal");