/// <summary>
/// Gets an entitycommanddefinition from cache if a match is found for the given cache key.
/// </summary>
/// <param name="entityCommandDefinition">out param. returns the entitycommanddefinition for a given cache key</param>
/// <returns>true if a match is found in cache, false otherwise</returns>
private bool TryGetEntityCommandDefinitionFromQueryCache(out EntityCommandDefinition entityCommandDefinition)
{
Debug.Assert(null != _connection, "Connection must not be null at this point");
entityCommandDefinition = null;
//
// if EnableQueryCaching is false, then just return to force the CommandDefinition to be created
//
if (!this._enableQueryPlanCaching || string.IsNullOrEmpty(this._esqlCommandText))
{
return(false);
}
//
// Create cache key
//
EntityClientCacheKey queryCacheKey = new EntityClientCacheKey(this);
//
// Try cache lookup
//
QueryCacheManager queryCacheManager = _connection.GetMetadataWorkspace().GetQueryCacheManager();
Debug.Assert(null != queryCacheManager, "QuerycacheManager instance cannot be null");
if (!queryCacheManager.TryCacheLookup(queryCacheKey, out entityCommandDefinition))
{
//
// if not, construct the command definition using no special options;
//
entityCommandDefinition = CreateCommandDefinition();
//
// add to the cache
//
QueryCacheEntry outQueryCacheEntry = null;
if (queryCacheManager.TryLookupAndAdd(new QueryCacheEntry(queryCacheKey, entityCommandDefinition), out outQueryCacheEntry))
{
entityCommandDefinition = (EntityCommandDefinition)outQueryCacheEntry.GetTarget();
}
}
Debug.Assert(null != entityCommandDefinition, "out entityCommandDefinition must not be null");
return(true);
}
private bool TryGetEntityCommandDefinitionFromQueryCache(
out EntityCommandDefinition entityCommandDefinition)
{
entityCommandDefinition = (EntityCommandDefinition)null;
if (!this._enableQueryPlanCaching || string.IsNullOrEmpty(this._esqlCommandText))
{
return(false);
}
EntityClientCacheKey key = new EntityClientCacheKey(this);
QueryCacheManager queryCacheManager = this._connection.GetMetadataWorkspace().GetQueryCacheManager();
if (!queryCacheManager.TryCacheLookup <EntityClientCacheKey, EntityCommandDefinition>(key, out entityCommandDefinition))
{
entityCommandDefinition = this.CreateCommandDefinition();
QueryCacheEntry outQueryCacheEntry = (QueryCacheEntry)null;
if (queryCacheManager.TryLookupAndAdd(new QueryCacheEntry((QueryCacheKey)key, (object)entityCommandDefinition), out outQueryCacheEntry))
{
entityCommandDefinition = (EntityCommandDefinition)outQueryCacheEntry.GetTarget();
}
}
return(true);
}
