public bool SaveObject(string persistenceId, string persistenceContext, string objectContent)
{
bool retVal = false;
try
{
if (string.IsNullOrEmpty(persistenceContext))
{
persistenceContext = "*";
}
string key = BuildCacheKey(persistenceId, persistenceContext);
bool foundInCache = false;
lock (_cachePollerLock)
{
// Is the requested object in the cache ?
if (_cache.ContainsKey(key))
{
Logger.LogTrace("SaveObject: Object with key {0} was found and updated in cache.", key);
// If it is, update it in the cache.
_cache[key].Value = objectContent;
foundInCache = true;
retVal = true;
}
}
// We need to update in DB anyways and also make sure it is in the cache.
if (foundInCache == false)
{
CacheItem ci = new CacheItem(key, objectContent);
lock (_cachePollerLock)
{
Logger.LogTrace("SaveObject: Object with key {0} was not found cache => adding it now", key);
_cache.Add(key, ci);
retVal = true;
}
}
ThreadPool.QueueUserWorkItem((c) =>
{
Logger.LogTrace("SaveObject: Object with key {0} is now saved also in DB.", key);
DbStore.SaveObject(persistenceId, persistenceContext, objectContent);
});
}
catch
{
retVal = false;
}
return(retVal);
}
public string ReadObject(string persistenceId, string persistenceContext)
{
if (string.IsNullOrEmpty(persistenceContext))
{
persistenceContext = "*";
}
string key = BuildCacheKey(persistenceId, persistenceContext);
lock (_cachePollerLock)
{
// Is the requested object in the cache ?
if (_cache.ContainsKey(key))
{
Logger.LogTrace("ReadObject: Object with key {0} was found in cache.", key);
// If it is, return it from the cache.
return(_cache[key].Value);
}
}
Logger.LogTrace("ReadObject: Object with key {0} was not found in cache.", key);
// If it is not, get it from the persistence DB and also add it in the cache.
string s = DbStore.ReadObject(persistenceId, persistenceContext);
if (s != null)
{
Logger.LogTrace("ReadObject: Object with key {0} was found in DB.", key);
CacheItem ci = new CacheItem(key, s);
lock (_cachePollerLock)
{
Logger.LogTrace("ReadObject: Object with key {0} was added to cache with a TTL of 5 sec", key);
_cache.Add(key, ci);
}
return(ci.Value);
}
Logger.LogTrace("ReadObject: Object with key {0} was not found in DB also.", key);
return(null);
}
public bool DeleteObject(string persistenceId, string persistenceContext)
{
bool retVal = false;
try
{
if (string.IsNullOrEmpty(persistenceContext))
{
persistenceContext = "*";
}
string key = BuildCacheKey(persistenceId, persistenceContext);
lock (_cachePollerLock)
{
if (_cache.ContainsKey(key))
{
Logger.LogTrace("DeleteObject: Object with key {0} was found in cache and removed.", key);
_cache.Remove(key);
retVal = true;
}
}
ThreadPool.QueueUserWorkItem((c) =>
{
Logger.LogTrace("DeleteObject: Object with key {0} is now removed also from the DB.", key);
DbStore.DeleteObject(persistenceId, persistenceContext);
});
}
catch
{
retVal = false;
}
return(retVal);
}