public virtual async Task <FindResults <TResult> > FindAsAsync <TResult>(IRepositoryQuery query, ICommandOptions options = null) where TResult : class, new()
{
options = ConfigureOptions(options.As <T>());
bool useSnapshotPaging = options.ShouldUseSnapshotPaging();
// don't use caching with snapshot paging.
bool allowCaching = IsCacheEnabled && useSnapshotPaging == false;
await OnBeforeQueryAsync(query, options, typeof(TResult)).AnyContext();
await RefreshForConsistency(query, options).AnyContext();
async Task <FindResults <TResult> > GetNextPageFunc(FindResults <TResult> r)
{
var previousResults = r;
if (previousResults == null)
{
throw new ArgumentException(nameof(r));
}
string scrollId = previousResults.GetScrollId();
if (!String.IsNullOrEmpty(scrollId))
{
var scrollResponse = await _client.ScrollAsync <TResult>(options.GetSnapshotLifetime(), scrollId).AnyContext();
_logger.LogRequest(scrollResponse, options.GetQueryLogLevel());
var results = scrollResponse.ToFindResults();
results.Page = previousResults.Page + 1;
results.HasMore = scrollResponse.Hits.Count >= options.GetLimit() || scrollResponse.Hits.Count >= options.GetMaxLimit();
// clear the scroll
if (!results.HasMore)
{
await _client.ClearScrollAsync(s => s.ScrollId(scrollId));
}
return(results);
}
if (options.ShouldUseSearchAfterPaging())
{
options.SearchAfterToken(previousResults.GetSearchAfterToken());
}
if (options == null)
{
return(new FindResults <TResult>());
}
options?.PageNumber(!options.HasPageNumber() ? 2 : options.GetPage() + 1);
return(await FindAsAsync <TResult>(query, options).AnyContext());
}
string cacheSuffix = options?.HasPageLimit() == true?String.Concat(options.GetPage().ToString(), ":", options.GetLimit().ToString()) : null;
FindResults <TResult> result;
if (allowCaching)
{
result = await GetCachedQueryResultAsync <FindResults <TResult> >(options, cacheSuffix : cacheSuffix).AnyContext();
if (result != null)
{
((IGetNextPage <TResult>)result).GetNextPageFunc = async r => await GetNextPageFunc(r).AnyContext();
return(result);
}
}
ISearchResponse <TResult> response;
if (useSnapshotPaging == false || !options.HasSnapshotScrollId())
{
var searchDescriptor = await CreateSearchDescriptorAsync(query, options).AnyContext();
if (useSnapshotPaging)
{
searchDescriptor.Scroll(options.GetSnapshotLifetime());
}
if (query.ShouldOnlyHaveIds())
{
searchDescriptor.Source(false);
}
response = await _client.SearchAsync <TResult>(searchDescriptor).AnyContext();
}
else
{
response = await _client.ScrollAsync <TResult>(options.GetSnapshotLifetime(), options.GetSnapshotScrollId()).AnyContext();
}
if (response.IsValid)
{
_logger.LogRequest(response, options.GetQueryLogLevel());
}
else
{
if (response.ApiCall.HttpStatusCode.GetValueOrDefault() == 404)
{
return(new FindResults <TResult>());
}
_logger.LogErrorRequest(response, "Error while searching");
throw new ApplicationException(response.GetErrorMessage(), response.OriginalException);
}
if (useSnapshotPaging)
{
result = response.ToFindResults();
result.HasMore = response.Hits.Count >= options.GetLimit();
// clear the scroll
if (!result.HasMore)
{
var scrollId = result.GetScrollId();
if (!String.IsNullOrEmpty(scrollId))
{
await _client.ClearScrollAsync(s => s.ScrollId(result.GetScrollId()));
}
}
((IGetNextPage <TResult>)result).GetNextPageFunc = GetNextPageFunc;
}
else
{
int limit = options.GetLimit();
result = response.ToFindResults(limit);
result.HasMore = response.Hits.Count > limit || response.Hits.Count >= options.GetMaxLimit();
((IGetNextPage <TResult>)result).GetNextPageFunc = GetNextPageFunc;
}
if (options.HasSearchAfter())
{
result.SetSearchBeforeToken();
if (result.HasMore)
{
result.SetSearchAfterToken();
}
}
else if (options.HasSearchBefore())
{
// reverse results
bool hasMore = result.HasMore;
result = new FindResults <TResult>(result.Hits.Reverse(), result.Total, result.Aggregations.ToDictionary(k => k.Key, v => v.Value), GetNextPageFunc, result.Data.ToDictionary(k => k.Key, v => v.Value));
result.HasMore = hasMore;
result.SetSearchAfterToken();
if (result.HasMore)
{
result.SetSearchBeforeToken();
}
}
else if (result.HasMore)
{
result.SetSearchAfterToken();
}
result.Page = options.GetPage();
if (!allowCaching)
{
return(result);
}
var nextPageFunc = ((IGetNextPage <TResult>)result).GetNextPageFunc;
((IGetNextPage <TResult>)result).GetNextPageFunc = null;
await SetCachedQueryResultAsync(options, result, cacheSuffix : cacheSuffix).AnyContext();
((IGetNextPage <TResult>)result).GetNextPageFunc = nextPageFunc;
return(result);
}