/// <summary>
/// Returns LavaTemplate object from cache. If template does not already exist in cache, it
/// will be read and added to cache
/// </summary>
/// <param name="engine">The key.</param>
/// <param name="key">The key.</param>
/// <param name="content">The content.</param>
/// <returns></returns>
public WebsiteLavaTemplateCache Get(ILavaEngine engine, string key, string content)
{
WebsiteLavaTemplateCache template;
// If cache items need to be serialized, do not cache the template because it isn't serializable.
if (RockCache.IsCacheSerialized)
{
template = Load(engine, content);
}
else
{
var fromCache = true;
template = WebsiteLavaTemplateCache.GetOrAddExisting(key, () =>
{
fromCache = false;
return(Load(engine, content));
});
if (fromCache)
{
Interlocked.Increment(ref _cacheHits);
}
else
{
Interlocked.Increment(ref _cacheMisses);
}
}
return(template);
}
void ILavaTemplateCacheService.ClearCache()
{
WebsiteLavaTemplateCache.Clear();
_cacheHits = 0;
_cacheMisses = 0;
}
void ILavaTemplateCacheService.AddTemplate(ILavaTemplate template, string cacheKey)
{
if (string.IsNullOrWhiteSpace(cacheKey))
{
throw new Exception("WebsiteLavaTemplateCache template add failed. A cache key must be specified.");
}
WebsiteLavaTemplateCache.UpdateCacheItem(cacheKey, new WebsiteLavaTemplateCache()
{
Template = template
});
}
private WebsiteLavaTemplateCache Load(ILavaEngine engine, string content)
{
if (engine == null)
{
throw new Exception("WebsiteLavaTemplateCache template load failed. The cache must be initialized for a specific engine.");
}
var result = engine.ParseTemplate(content);
var cacheEntry = new WebsiteLavaTemplateCache {
Template = result.Template
};
return(cacheEntry);
}
/// <summary>
/// Gets a flag indicating if the cache contains the specified template.
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public bool Contains(string key)
{
if (RockCache.IsCacheSerialized)
{
return(false);
}
bool contains = true;
var template = WebsiteLavaTemplateCache.GetOrAddExisting(key, () =>
{
contains = false;
return(null);
});
return(contains);
}
void ILavaTemplateCacheService.RemoveKey(string key)
{
WebsiteLavaTemplateCache.Remove(key);
}
void ILavaTemplateCacheService.RemoveTemplate(string content)
{
var key = GetTemplateKey(content);
WebsiteLavaTemplateCache.Remove(key);
}