private bool LoadMessagesIntoCache(string langtag)
{
lock (Sync)
{
// It is possible for multiple threads to race to this method. The first to
// enter the above lock will insert the messages into the cache.
// If we lost the race...no need to duplicate the work of the winning thread.
if (System.Web.HttpRuntime.Cache[GetCacheKey(langtag)] != null)
{
return(true);
}
Translation t = _translationRepository.GetTranslation(langtag);
// Cache messages.
// · In order to facilitate dynamic refreshing of translations during runtime
// (without restarting the server instance) we first establish something upon
// which the cache entry will be dependent: that is a 'cache dependency' object
// which essentially triggers an event if/when the entry is to be considered
// as 'dirty' and whihc is listened to by the cache.
// In our case, we want this 'dirty' event to be triggered if/when the
// translation's source PO file is updated.
// NB: it is possible for GetCacheDependencyForSingleLanguage to return null in the
// case of the default language where it is added to AppLanguages yet there
// doesn't actually exist an underlying PO file. This is perfectly valid when
// LocalizedApplication.MessageKeyIsValueInDefaultLanguage == true (default setting).
// In this case the cache entry is associated with the null CacheDependency instance
// which means the cache entry is effectively permanent for this server instance.
System.Web.Caching.CacheDependency cd = _translationRepository.GetCacheDependencyForSingleLanguage(langtag);
// · Insert translation into cache associating it with any CacheDependency.
System.Web.HttpRuntime.Cache.Insert(GetCacheKey(langtag), t.Items, cd);
}
return(true);
}
private bool LoadMessagesIntoCache(string langtag)
{
lock (Sync)
{
// It is possible for multiple threads to race to this method. The first to
// enter the above lock will insert the messages into the cache.
// If we lost the race...no need to duplicate the work of the winning thread.
if (System.Web.HttpRuntime.Cache[GetCacheKey(langtag)] != null)
{
return(true);
}
Translation t = _translationRepository.GetTranslation(langtag);
// Cache messages.
// NB: if the file changes we want to be able to rebuild the index without recompiling.
// NB: it is possible for GetCacheDependencyForSingleLanguage to return null in the
// case of the default language where it is added to AppLanguages yet doesn't actually exist.
// See MessageKeyIsValueInDefaultLanguage.
var cd = _translationRepository.GetCacheDependencyForSingleLanguage(langtag);
if (cd != null)
{
System.Web.HttpRuntime.Cache.Insert(GetCacheKey(langtag), t.Items, cd);
}
}
return(true);
}
