/// <summary>
/// Gets the expiration timeout for a given command definition.
/// </summary>
/// <param name="cachingCommandDefinition">The command definition.</param>
/// <param name="slidingExpiration">The sliding expiration time.</param>
/// <param name="absoluteExpiration">The absolute expiration time.</param>
protected internal virtual void GetExpirationTimeout(
CachingCommandDefinition cachingCommandDefinition,
out TimeSpan slidingExpiration,
out DateTime absoluteExpiration)
{
slidingExpiration = TimeSpan.Zero;
absoluteExpiration = DateTime.MaxValue;
}
/// <summary>
/// Determines whether the specified command definition can be cached.
/// </summary>
/// <param name="commandDefinition">The command definition.</param>
/// <returns>
/// A value of <c>true</c> if the specified command definition can be cached; otherwise, <c>false</c>.
/// </returns>
protected internal override bool CanBeCached(CachingCommandDefinition commandDefinition)
{
if (commandDefinition == null)
{
throw new ArgumentNullException("commandDefinition");
}
// check if we have any non-cacheable tables in the query
if (NonCacheableTables.Count > 0)
{
if (commandDefinition.AffectedEntitySets.Any(esb => NonCacheableTables.Contains(esb.Name)))
{
return false;
}
}
// by default everything is cacheable
return
CacheableTables.Count == 0 ||
commandDefinition.AffectedEntitySets.All(esb => CacheableTables.Contains(esb.Name));
// unless the user has explicitly specified which tables to cache
}
/// <summary> /// Gets the minimum and maximum number cacheable rows for a given command definition. /// </summary> /// <param name="cachingCommandDefinition">The command definition.</param> /// <param name="minCacheableRows">The minimum number of cacheable rows.</param> /// <param name="maxCacheableRows">The maximum number of cacheable rows.</param> protected internal abstract void GetCacheableRows( CachingCommandDefinition cachingCommandDefinition, out int minCacheableRows, out int maxCacheableRows);
/// <summary> /// Determines whether the specified command definition can be cached. /// </summary> /// <param name="commandDefinition">The command definition.</param> /// <returns> /// A value of <c>true</c> if the specified command definition can be cached; otherwise, <c>false</c>. /// </returns> protected internal abstract bool CanBeCached(CachingCommandDefinition commandDefinition);
/// <summary>
/// Gets the minimum and maximum number cacheable rows for a given command definition.
/// </summary>
/// <param name="cachingCommandDefinition">The command definition.</param>
/// <param name="minCacheableRows">The minimum number of cacheable rows.</param>
/// <param name="maxCacheableRows">The maximum number of cacheable rows.</param>
protected internal override void GetCacheableRows(
CachingCommandDefinition cachingCommandDefinition,
out int minCacheableRows,
out int maxCacheableRows)
{
minCacheableRows = MinCacheableRows;
maxCacheableRows = MaxCacheableRows;
}