public static QueryResults GetQueryResults(Query q, bool aggressiveCaching, out string cacheKey)
{
int startIndex = q.StartResultIndex;
int endIndex = q.EndResultIndex;
if (endIndex < 50 && aggressiveCaching)
{
q.StartResultIndex = 0;
q.EndResultIndex = 50;
}
int hashCode = q.GetHashCode();
cacheKey = CacheKey(q);
QueryResults finalResults = null;
Cacheable results = null;
try
{
using (queryLock.Lock(cacheKey, defaultTimeout))
{
results = HttpRuntime.Cache[cacheKey] as Cacheable;
if (results == null)
{
results = RunQueryAndCache(q, cacheKey);
}
}
}
catch (NamedLock<Query>.TimeoutException timeout)
{
throw new QueryBrokerException(
string.Format("The timeout period expired when trying to retrieve query results: {0}", hashCode),
timeout
);
}
if (results == null || results.Results == null)
{
throw new QueryBrokerException("Unable to retrieve query results");
}
if (results.LastRunTime < lastIndexUpdate)
{
QueueQuery(q, cacheKey, results);
}
finalResults = QueryResults.BuildFromRawQuery(results.Results, CachedQueryObjectLoader);
if (startIndex != finalResults.FirstIndex || endIndex != finalResults.LastIndex)
{
finalResults = finalResults.GetRange(startIndex, endIndex);
}
return finalResults;
}
static string CacheKey(Query q)
{
return string.Concat("Query[", q.GetHashCode(), "]");
}