/// <summary>
/// Execute the given query as an synchronous operation.
/// </summary>
/// <param name="query">The query to be executed</param>
/// <param name="options">Query options to use for this query</param>
/// <returns>The result of the given query</returns>
public TResult QuerySync(TQuery query, EntryOptions options)
{
if ((options.Behaviors & EntryBehaviors.LookupCache) == EntryBehaviors.LookupCache)
{
if ((options.Behaviors & EntryBehaviors.SaveToCache) == EntryBehaviors.SaveToCache)
{
return(m_queryTaskCache.GetOrAdd(query, new Lazy <TResult>(() => DoQuerySync(query)), options).Value);
}
else
{
Lazy <TResult> lazyResult;
if (m_queryTaskCache.TryGet(query, out lazyResult))
{
return(lazyResult.Value);
}
else
{
return(DoQuerySync(query));
}
}
}
else
{
if ((options.Behaviors & EntryBehaviors.SaveToCache) == EntryBehaviors.SaveToCache)
{
var newQueryTask = new Lazy <TResult>(() => DoQuerySync(query));
m_queryTaskCache.Set(query, newQueryTask, options);
return(newQueryTask.Value);
}
else
{
return(DoQuerySync(query));
}
}
}
/// <summary>
/// Execute the given query as an asynchronous operation with a specified cache policy.
/// </summary>
/// <param name="query">The query to be executed</param>
/// <param name="options">The cache policy options.</param>
/// <returns>The task object representing the asynchronous operation</returns>
public Task <TResult> QueryAsync(TQuery query, EntryOptions options)
{
Task <TResult> queryTask = null;
if ((options.Behaviors & EntryBehaviors.LookupCache) == EntryBehaviors.LookupCache)
{
if ((options.Behaviors & EntryBehaviors.SaveToCache) == EntryBehaviors.SaveToCache)
{
queryTask = m_queryTaskCache.GetOrAdd(query, new AsyncLazy <TResult>(() => DoQueryAsync(query)), options).Value;
}
else
{
AsyncLazy <TResult> asyncLazyResult;
if (m_queryTaskCache.TryGet(query, out asyncLazyResult))
{
queryTask = asyncLazyResult.Value;
}
else
{
//no task cached, do it directly
return(DoQueryAsync(query));
}
}
//re-query if the task is canceld or failed.
if ((queryTask.IsFaulted || queryTask.IsCanceled) && (options.Behaviors & EntryBehaviors.ReQueryWhenErrorCached) == EntryBehaviors.ReQueryWhenErrorCached)
{
options.Behaviors ^= EntryBehaviors.LookupCache;
this.QueryAsync(query, options);
}
//query is cached, just await the result
return(queryTask);
}
else
{
if ((options.Behaviors & EntryBehaviors.SaveToCache) == EntryBehaviors.SaveToCache)
{
var newQueryTask = new AsyncLazy <TResult>(() => DoQueryAsync(query));
m_queryTaskCache.Set(query, newQueryTask, options);
return(newQueryTask.Value);
}
else
{
return(DoQueryAsync(query));
}
}
}
